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Synthesis and characterization of hybrid organic-inorganic materials based on EA-MAn-APTES and silica 被引量:1
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作者 邱凤仙 周钰明 +1 位作者 刘举正 张旭苹 《Journal of Southeast University(English Edition)》 EI CAS 2005年第1期63-67,共5页
Poly (EA-MAn-APTES)/silica hybrid materials were successfully prepared fromEthyl acrylate (EA), maleic anhydride (MAn) and tetraethoxysilane (TEOS) in the presence of acoupling agent 3-aminopropyltriethoxysilane (APTE... Poly (EA-MAn-APTES)/silica hybrid materials were successfully prepared fromEthyl acrylate (EA), maleic anhydride (MAn) and tetraethoxysilane (TEOS) in the presence of acoupling agent 3-aminopropyltriethoxysilane (APTES),by free-radical solution polymerization and insitu sol-gel process. The mass fraction of TEOS varied from 0 to 25%. The hybrid materials werecharacterized by the methods of FT-IR spectra, solvent extraction, scanning electron microscope (SEM), transmission electron microscope (TEM), differential scanning calorimetry (DSC) andthermogravimetric analysis (TGA) measuring apparatus to get their structures, gel contents,morphologies, particle sizes and thermal performances. The results show that the covalent bonds arebetween organic and inorganic phases, gel contents in the hybrid materials are much higher, theSiO_2 phase is well dispersed in the polymer matrix, silicon dioxide exist at nanoscale in thecomposites and have excellent thermal stability. 展开更多
关键词 organic-inorganic hybrid material sol-gel process Ethyl acrylate maleicanhydride 3-aminopropyltriethoxysilane (APTES)
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Synthesis and Characterization of Two New Photochromic Inorganic-organic Hybrid Materials Based on Keggin-type Polyoxometalates
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作者 库宗军 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2008年第3期367-371,共5页
Two new photochromic inorganic-organic hybrid materials formed from Keggin-type polyoxometalates(POMs) and metronidazole (C6H9N3O3, MNZ), formulated as H3PMo12OaO-3MNZ·3H2O (1) and H3PW12O40.3MNZ·3H2O... Two new photochromic inorganic-organic hybrid materials formed from Keggin-type polyoxometalates(POMs) and metronidazole (C6H9N3O3, MNZ), formulated as H3PMo12OaO-3MNZ·3H2O (1) and H3PW12O40.3MNZ·3H2O(2), were synthesized and characterized by elemental analysis, IR spectra, electronic spectra, electron spin resonance (ESR) spectra and thermogravi-metry-differential thermal analysis (TG-DTA). Reflectance spectra show the presence of weak intermolecular charge transfer between the organic and inorganic moieties in the solid state. The photochromic properties were studied by solid diffuse reflectance spectra and ESR spectra, and the photochromic reactions were found to exhibit first-order kinetics. TG-DTA showed that two hybrid materials have similar thermal behavior. 展开更多
关键词 POLYOXOMETALATE METRONIDAZOLE hybrid material photochromISM kinetics
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Fabrication of branch-like Aph@LDH-MgO material through organic-inorganic hybrid conjugation for excellent anti-corrosion performance
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作者 Maryam Chafiq Abdelkarim Chaouiki +1 位作者 Rachid Salghi Young Gun Ko 《Journal of Magnesium and Alloys》 SCIE EI CAS CSCD 2023年第7期2469-2485,共17页
Layered double hydroxides(LDH)frameworks have shown significant enhancement in stability and reusability,and their tailorable architecture brings new insight into the development of the next generation of hybrid mater... Layered double hydroxides(LDH)frameworks have shown significant enhancement in stability and reusability,and their tailorable architecture brings new insight into the development of the next generation of hybrid materials,which attracted considerable attention in many fields over the years.One of the factors contributing to the widespread applicability of layered double hydroxides is their adaptable composition,which can accommodate a wide spectrum of potential anionic guests.This exceptional property makes the LDH system simple to adjust for various applications.However,most LDH systems are synthesized in situ in an autoclave at high temperatures and pressures that severely restrict the industrial use of such coating systems.In this study,LDH was directly synthesized on a magnesium alloy that had undergone plasma electrolytic oxidation(PEO)treatment in the presence of ethylenediaminetetraacetic acid,thereby avoiding the use of hydrothermal autoclave conditions.This LDH system was compared with a hybrid architecture consisting of organic-inorganic self-assembly.An organic layer was fabricated on top of the LDH film using 4-Aminophenol(Aph)compound,resulting in a smart hierarchical structure that can provide a robust Aph@LDH film with excellent anti-corrosion performance.At the molecular level,the conjugation characteristics and adsorption mechanism of Aph molecule were studied using two levels of theory as follows.First,Localized orbit locator(LOL)-πisosurface,electrostatic potential(ESP)distribution,and average local ionization energy(ALIE)on the molecular surface were used to highlight localization region,reveal the favorable electrophilic and nucleophilic attacks,and clearly explore the type of interactions that occurred around interesting regions.Second,first-principles based on density functional theory(DFT)was applied to study the hybrid mechanism of Aph on LDH system and elucidate their mutual interactions.The experimental and computational analyses suggest that the highπ-electron density and delocalization characteristics of the functional groups and benzene ring in the Aph molecule played a leading role in the synergistic effects arising from the combination of organic and inorganic coatings.This work provides a promising approach to design advanced hybrid materials with exceptional electrochemical performance. 展开更多
关键词 Magnesium alloy Surface modification LDH organic-inorganic hybrid materials Inter-/intra-molecular interactions
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Ferroelectric Properties and Applications of Hybrid Organic-Inorganic Perovskites 被引量:1
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作者 Xin Tong Zhiming M. Wang 《Journal of Electronic Science and Technology》 CAS CSCD 2017年第4期326-332,共7页
Hybrid organic-inorganic perovskites (e.g. CH;NH;PbI;) have attracted tremendous attention due to their promise for achieving next-generation cost-effective and high performance optoelectronic devices.These hybrid o... Hybrid organic-inorganic perovskites (e.g. CH;NH;PbI;) have attracted tremendous attention due to their promise for achieving next-generation cost-effective and high performance optoelectronic devices.These hybrid organic-inorganic perovskites possess excellent optical and electronic properties, including strong light absorption, high carrier abilities, optimized charge diffusion lengths, and reduced charge recombination etc., leading to their widespread applications in advanced solar energy technologies (e.g.high efficiency perovskite solar cells). However, there is still a lack of investigations regarding fundamental properties such as ferroelectricity in these perovskites.As conventional ferroelectric ceramics are prepared at high temperature and have no mechanically flexibility,low-temperature proceed and flexible perovskite ferroelectrics have become promising candidates and should be exploited for future flexible ferroelectric applications. Here, ferroelectric properties in hybrid organic-inorganic perovskites and several state-of-the-art perovskite ferroelectrics are reviewed. Novel ferroelectric applications of hybrid organic-inorganic perovskites are discussed as well, providing guideline for realizing future high performance and flexible ferroelectric devices. 展开更多
关键词 FERROELECTRICITY ferroelectric materials flexible devices organic-inorganic perovskites
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Synthesis,Structure and Properties of a Novel Copolymer with Photochromic and Photoluminescence Functions 被引量:1
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作者 YANG Long ZHAO Tianxiang +1 位作者 SHU Dengkun XI Peng 《Journal of Donghua University(English Edition)》 EI CAS 2020年第6期460-469,共10页
Photochromic and photoluminescence materials show bright colors under different excitation conditions,and thus,these functional materials have been applied in many fields.Based on the photochromic and photoluminescenc... Photochromic and photoluminescence materials show bright colors under different excitation conditions,and thus,these functional materials have been applied in many fields.Based on the photochromic and photoluminescence theories,a block copolymer,which could be directly processed into nanofibers by electrospinning,was successfully prepared through atom transfer radical polymerization(ATRP).To synthesize the block copolymer,a vinyl monomer containing a spiropyran unit was employed to prepare the photochromic chain segment,and a polymethyl methacrylate(PMMA)chain segment was introduced to improve the processability of the block copolymer.Acting as the photoluminescence unit,the rare earth complex was linked to the side chain through coordination bonding between the rare earth ions and the ester groups of PMMA.When the photochromic and photoluminescence block copolymer was exposed to different wavelengths of ultraviolet(UV)light and visible(Vis)light,it could show white,red,green,yellow,and blue-purple.These results provide the potential of the as-prepared photochromic and photoluminescence block copolymer for application in fibers and fabrics. 展开更多
关键词 photochromic material photoluminescence material SPIROPYRAN atom transfer radical polymerization(ATRP) block copolymer
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Photochromic behavior and mechanism of thin films containing tungstosilicate acid
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作者 黄家骏 董晓雯 +1 位作者 潘庆谊 程知萱 《Journal of Shanghai University(English Edition)》 CAS 2008年第4期368-371,共4页
A novel reversible photochromic nanocomposite film based on a hybrid inorganic-organic matrix in which heteropolyacid H4SiW12O40 (SiWA) was entrapped in Si-O-Ti network was prepared. Structure, photochromic behavior... A novel reversible photochromic nanocomposite film based on a hybrid inorganic-organic matrix in which heteropolyacid H4SiW12O40 (SiWA) was entrapped in Si-O-Ti network was prepared. Structure, photochromic behaviors and mechanism of the film were investigated by means of infrared spectroscopy (IR), ultraviolet-visible (UV-Vis) absorption spectra and electron spin resonance (ESR). The results showed that heteropolyanion i.e. SiW12O^4- 40 (SiW12), maintained a Keggin structure in the film and there was a strong interaction between anion SiW12 and cation R-NH^+3 (R=link of hybrid composite). The photochromic properties of the composite film originated from reversible charge transfer between the anions and cations. Under UV irradiation, the anion would be reduced via one-electron step with simultaneous oxidation of the cation, accompanied by a color change from colorless to blue. Bleaching could occur when the film was in contact with ambient air or 02 in the dark. 展开更多
关键词 organic-inorganic SOL-GEL photochromic tungstosilicate aicd
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Preparation of Dithienylethene with Amino Groups, and Photochromic Behavior in Langmuir-Blodgett Film of the Amphiphilicdithienylethene
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作者 Tetsuzo Fujise Michinori Takeshita +1 位作者 Koichi Sakaguchi Masanao Era 《International Journal of Organic Chemistry》 2013年第2期158-161,共4页
We successfully synthesized dithienylethene with amino groups. Then, we successfully prepared Langmuir-Blodgett (LB) films of the dithienylethene having ammonium cation group when dodecyl benzene sulfonic acid was emp... We successfully synthesized dithienylethene with amino groups. Then, we successfully prepared Langmuir-Blodgett (LB) films of the dithienylethene having ammonium cation group when dodecyl benzene sulfonic acid was employed as an anionic counter ion. From X-ray diffraction profiles, however, it was demonstrated that they did not form well-defined layered structure;X-ray diffraction peaks were much broadened. Photochromic behavior was confirmed in the LB films. Unfortunately, the LB films were not so stable;photochromic reaction was observed only several times in the LB films. 展开更多
关键词 AMPHIPHILIC DITHIENYLETHENE LANGMUIR-BLODGETT Film photochromic material Dodecyl Benzenesulfonic ACID
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Thermal Studies and Analytical Applications of a Newly Synthesized Composite Material “Polyaniline Stannic Molybdate”
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作者 Sajad Ahmad Ganai Javid Ahmad Banday +1 位作者 Abid Hussain Shalla Tabassum Ara 《International Journal of Nonferrous Metallurgy》 2013年第3期106-109,共4页
Polyaniline stannic molybdate—an organic-inorganic composite material, was prepared via sol-gel mixing of organic polymer polyaniline into matrices of inorganic precipitate of stannicmolybdate. The composite material... Polyaniline stannic molybdate—an organic-inorganic composite material, was prepared via sol-gel mixing of organic polymer polyaniline into matrices of inorganic precipitate of stannicmolybdate. The composite material synthesized at pH 1.2 showed an ion exchange capacity 1.8 meq/g for Na+?ions. Ion exchange capacity, pH titration and distribution studies were carried out to determine the preliminary ion exchange properties of the material. The distribution studies showed the selectivity of Hg(II) ions by this material. The effect of temperature on the ion exchange capacity of the material at different temperatures had been studied. The sorption behavior of metal ions was also explored in different surfactant media. 展开更多
关键词 organic-inorganic Hybrid material POLYANILINE Stannic MOLYBDATE Synthesis Thermal Studies
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THE STUDY OF UV-PHOTOCHROMIC ANTI-COUNTERFEIT PAPER
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作者 XiaoxiuHao ShuhuiYang QunceFeng YuruZhou 《天津科技大学学报》 CAS 2004年第A01期197-202,共6页
The hydrophilicity, dispersity and minuteness of UV (ultraviolet)-photochromic special function materials and its retention and formation mechanisms in stock were comprehensively studied, and the retention mechanism o... The hydrophilicity, dispersity and minuteness of UV (ultraviolet)-photochromic special function materials and its retention and formation mechanisms in stock were comprehensively studied, and the retention mechanism of UV-photochromic fiber was also studied. In addition, according to the disadvantages of special function materials such as big grain, bad hydrophilicity, expensive price and so on, this paper displays our effects focused on the developing of anti-counterfeit pigments slurry system. Moreover, the properties and anti-counterfeit mechanism of the paper with different special function materials were researched by fluorescent spectrum. 展开更多
关键词 紫外光致变色 防伪纸 色素 功能材料 荧光光谱
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Multicolor upconversion reversible modulations in YNbO_(4):Er^(3+)/Tm^(3+)/Yb^(3+) photochromic materials
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作者 Zhen Zhang Peng Li +4 位作者 Ziyi Xu Zhihao Zhang Qiwei Zhang Haiqin Sun Xihong Hao 《Journal of Rare Earths》 SCIE EI CAS CSCD 2024年第2期270-277,I0002,共9页
Photochromic materials with multicolor upconversion reversible modulations are attractive in optical switching devices.Herein,the fabricated YNbO_(4):Er^(3+)/Tm^(3+)/Yb^(3+) materials exhibit excellent photochromism a... Photochromic materials with multicolor upconversion reversible modulations are attractive in optical switching devices.Herein,the fabricated YNbO_(4):Er^(3+)/Tm^(3+)/Yb^(3+) materials exhibit excellent photochromism and multicolor upconversion properties from green,red to near infrared(NIR) emissions with increasing Yb concentrations.Reversible multiband upconversion modulations are achieved by alternating light(365 and 405 nm) or thermal stimuli.After 365 nm irradiation,the luminescence color changes from yellow to red,the luminescent photoswitching contrast reaches up to 86.21%(green),82.12%(red) and 77.38%(NIR) in the Y_(0.83)Er_(0.01)Tm_(0.01)NbO_(4):0.15 Yb sample.Besides,the upconversion emission intensity before and after photochromic reaction shows remarkable change in a wide temperature range of 298-718 K.These results indicate that the Er^(3+)/Tm^(3+)/Yb^(3+) tri-doped YNbO_(4) materials can be a good candidate in optical switching and data storage applications. 展开更多
关键词 photochromic materials Luminescence modulation Multicolor emission Photoswitching contrast Rare earths
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Single-beam two-photon three-dimensional optical storage in a pyrryl-substituted fulgide photochromic material 被引量:6
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作者 Ningfang Liao Mali Gong +2 位作者 Duanyi Xu Guosheng Qi Kai Zhang 《Chinese Science Bulletin》 SCIE EI CAS 2001年第22期1856-1859,共4页
We introduce a high-density three-dimensional optical data storage approach by using a pyrryl-sub-stituted fulgide photochromic material with a method of single-beam two-photon recording and fluorescence confocal read... We introduce a high-density three-dimensional optical data storage approach by using a pyrryl-sub-stituted fulgide photochromic material with a method of single-beam two-photon recording and fluorescence confocal readout. The detailed information about the photochromic material and the experimental setup are presented. The experiments about multi-layered recording and readout are carried out with a 100-μm-thick transparent photochromic material film. The results show that the lateral resolution is better than 1 μm, and the longitudinal resolution is about 3 μm. Besides, the readout times for the recorded data aredesirable when using a readout laser power smaller than 5 mW. 展开更多
关键词 TWO-PHOTON optical data storage photochromic material CONFOCAL microscope.
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Enhancement of superconductivity in organic-inorganic hybrid topological materials 被引量:5
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作者 Haoxiong Zhang Awabaikeli Rousuli +10 位作者 Shengchun Shen Kenan Zhang Chong Wang Laipeng Luo Jizhang Wang Yang Wu Yong Xu Wenhui Duan Hong Yao Pu Yu Shuyun Zhou 《Science Bulletin》 SCIE EI CAS CSCD 2020年第3期188-193,共6页
Inducing or enhancing superconductivity in topological materials is an important route toward topological superconductivity.Reducing the thickness of transition metal dichalcogenides(e.g.WTe2 and MoTe2)has provided an... Inducing or enhancing superconductivity in topological materials is an important route toward topological superconductivity.Reducing the thickness of transition metal dichalcogenides(e.g.WTe2 and MoTe2)has provided an important pathway to engineer superconductivity in topological matters.However,such monolayer sample is difficult to obtain,unstable in air,and with extremely low Tc.Here we report an experimentally convenient approach to control the interlayer coupling to achieve tailored topological properties,enhanced superconductivity and good sample stability through organic-cation intercalation of the Weyl semimetals MoTe2 and WTe2.The as-formed organic-inorganic hybrid crystals are weak topological insulators with enhanced Tc of 7.0 K for intercalated MoTe2(0.25 K for pristine crystal)and2.3 K for intercalated WTe2(2.8 times compared to monolayer WTe2).Such organic-cation intercalation method can be readily applied to many other layered crystals,providing a new pathway for manipulating their electronic,topological and superconducting properties. 展开更多
关键词 Intercalation of organic cation TOPOLOGICAL materialS WEYL SEMIMETALS MoTe2 and WTe2 Ionic liquids cations organic-inorganic hybrid materialS Enhanced SUPERCONDUCTIVITY
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Ultrafast processes in photochromic material YH_xO_y studied by excited-state density functional theory simulation 被引量:2
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作者 Jun Chai Zewei Shao +8 位作者 Han Wang Chen Ming Wanseok Oh Tang Ye Yong Zhang Xun Cao Ping Jin Shengbai Zhang Yi-Yang Sun 《Science China Materials》 SCIE EI CSCD 2020年第8期1579-1587,共9页
Oxygen-containing rare-earth metal hydride YH_xO_y,is a newly found photochromic material showing fast photoresponse.While its preparation method,optical properties and structural features have been studied extensivel... Oxygen-containing rare-earth metal hydride YH_xO_y,is a newly found photochromic material showing fast photoresponse.While its preparation method,optical properties and structural features have been studied extensively,the photochromic mechanism in YH_xO_yremains unknown Here,using excited-state molecular dynamics simulation based on the recently developed real-time time-dependent density functional theory(RT-TDDFT)method,we study the photochemical reactions in YH_xO_y.We find that under photoexcitation,dihydrogen defects are formed within 100 fs.The dihydrogen defect behaves as a shallow donor and renders the material strongly n-type doped,which could be responsible for the photochromic effect observed in YH_xO_y.We also find that oxygen concentration affects the metastability of the dihydrogen species,meaning that the energy barrier for the dihydrogen to dissociate is related to the oxygen concentration The highest barrier of 0.28 eV is found in our model with O/Y=1:8.If the oxygen concentration is too low,the dihydrogen will quickly dissociate when the excitation is turned off.If the oxygen concentration is too high,the dihydrogen dissociates even when the excitation is still on. 展开更多
关键词 YHxOy photochromic material photochromic mechanism DIHYDROGEN oxygen concentration
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Organic-inorganic Hybrid Materials Based on Molybdophosphate and Organic Polyammonium 被引量:3
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作者 靳素荣 张联盟 +3 位作者 柳士忠 姚礼峰 胡学雷 赵卫锋 《Chinese Journal of Chemistry》 SCIE CAS CSCD 2005年第8期1123-1126,共4页
A new organic-inorganic hybrid compound (dienHs)2(P2Mo5O23) (1) [dien=NH(CH2CH2NH2)2] has been hydrothermally synthesized and characterized by elemental analyses, IR spectrum, thermogravimetric analysis, and t... A new organic-inorganic hybrid compound (dienHs)2(P2Mo5O23) (1) [dien=NH(CH2CH2NH2)2] has been hydrothermally synthesized and characterized by elemental analyses, IR spectrum, thermogravimetric analysis, and the single crystal X-ray diffraction technique. Compound 1 crystallizes in the triclinic system with space group P1 and a=0.9790(2) nm, b=0.9922(2) nm, c= 1.4644(3) nm, α=95.510(10)°, β=98.860(10)°, γ=95.700(10)°, V=1.3895(5) nm^3, Z=2, R=0.0465. The results show that the compound consists of dienH3^3++ and P2Mo5O23^6-, and the heteropoly anion P2Mo5O23^6- is connected to a 1-D chain structure with the protonated dien by hydrogen bonds. 展开更多
关键词 hydrothermal synthesis MOLYBDOPHOSPHATE organic-inorganic hybrid material crystal structure
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Functional-template directed self-assembly(FTDSA) of mesostructured organic-inorganic hybrid materials 被引量:2
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作者 LI LeLe SUN LingDong ZHANG YaWen m YAN ChunHua 《Science China Chemistry》 SCIE EI CAS 2009年第11期1759-1768,共10页
Since the discovery of a surfactant directed self-assembly approach for the fabrication of mesoporous silica in 1992,increasing attention has been focused on the design and synthesis of mesostructured functional mater... Since the discovery of a surfactant directed self-assembly approach for the fabrication of mesoporous silica in 1992,increasing attention has been focused on the design and synthesis of mesostructured functional materials.Organic functionalization is becoming a major topic in this research field,since highly ordered mesostructured organic-inorganic hybrids offer novel functionalities and enhanced performance over their individual components.We begin with a brief overview of the three fundamental methods(post-synthetic grafting technique,co-condensation method,and preparation of periodic mesoporous organosilicas) for the preparation of organically functionalized mesostructured silica,and focus on one of the most promising approaches,which herein was named as functional-template directed self-assembly(FTDSA) approach,and in the eyes of the authors it has a special position in the preparation of this class of hybrid materials.A comprehensive overview of the state of research in the area of FTDSA and its potential applications will be given. 展开更多
关键词 MESOPOROUS materials SELF-ASSEMBLY organic-inorganic HYBRIDS
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Partially reversible photochromic behavior of organic-inorganic perovskites with copper(II) chloride 被引量:1
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作者 Xiao-wei PAN Gang WU +1 位作者 Mang WANG Hong-zheng CHEN 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2009年第5期710-715,共6页
We report that the ultraviolet (UV) light induced photochromic behavior of layered organic-inorganic perovskite material of (C4H9NH3)2CuCl4, changed from yellow to brown after irradiation with UV light (10 mW/cm^... We report that the ultraviolet (UV) light induced photochromic behavior of layered organic-inorganic perovskite material of (C4H9NH3)2CuCl4, changed from yellow to brown after irradiation with UV light (10 mW/cm^2) and partially recovered through storage in the dark. (C4H9NH3)2CuCl4 exhibited two distinct absorption bands centered at 286 nm (band Ⅰ) and 384 nm (band Ⅱ), which were attributed to the photo-induced exciton formed in 2D inorganic layers sandwiched by organic layers. The blue shift of band Ⅰ from 287 to 269 nm as well as the decrease of the intensity of band Ⅰ and band Ⅱ could be found when samples were irradiated under UV light for different length of time. The simultaneous weakening of the intensity of the N-H...Cl hydrogen bond as well as the vibration of the long Cu-Cl bond in the distorted CuCl6^4- octahedron could be detected from the Fourier transform infrared (FTIR) spectra, which resulted the change of charge distribution of the dissymmetric Cl-Cu...Cl bond and the resulting photochromic behavior. 展开更多
关键词 photochromic behavior PEROVSKITE organic-inorganic hybrid
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Enhanced photocatalytic hydrogen production under visible light of an organic-inorganic hybrid material based on enzo[1,2-b:4,5-b']dithiophene polymer and TiO_(2) 被引量:1
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作者 Fang Jing Yanmeng Guo +3 位作者 Bo Li Yi-Fan Chen Chunman Jia Jianwei Li 《Chinese Chemical Letters》 SCIE CAS CSCD 2022年第3期1303-1307,共5页
Titanium dioxide(TiO_(2))has been limited in photocatalysis due to its wide band gap(3.2 eV)and limited absorption in the ultraviolet range.Therefore,organic components have been introduced to hybrid with TiO_(2) for ... Titanium dioxide(TiO_(2))has been limited in photocatalysis due to its wide band gap(3.2 eV)and limited absorption in the ultraviolet range.Therefore,organic components have been introduced to hybrid with TiO_(2) for enhanced photocatalytic efficiency under visible light.Here,we report that benzo[1,2-b:4,5-b']dithiophene polymer was an ideal organic material for the preparation of a hybrid material with TiO_(2).The energy band gap of the resulting hybrid material decreased to 2.9 eV and the photocatalytic hydrogen production performance reached 745.0μmol g^(-1) h^(-1) under visible light irradiation.Meanwhile,the material still maintained the stability of hydrogen production performance after 40 h of photocatalytic cycles.The analysis of the transient current response and electrochemical impedance revealed that the main reasons for the enhanced water splitting of the hybrid materials were the faster separation of electron hole pairs and the lower recombination of photocarrier ions.Our findings suggest that polythiophene is a promising organic material for exploring hybrid materials with enhanced photocatalytic hydrogen production. 展开更多
关键词 PHOTOCATALYSIS TiO_(2) Benzo[1 2-b:5-b’]dithiophene POLYTHIOPHENE organic-inorganic hybrid materials Sol-gel process
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Photochromism in CaS:Sm
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作者 Xiao Lin SUN Gut Lan ZHANG +3 位作者 Guo Qing TANG Wen Ju CHEN Guang Yan HONG Hong Peng YOU(Optical Information Science Laboratory, Institute of Modern Optics, Nankai University, Tianjin,300071)(Changchun Institute of Applied Chemistry, Chinese Academy of Scien 《Chinese Chemical Letters》 SCIE CAS CSCD 1999年第2期185-186,共2页
The photochromism in CaS:Sm (from white to pink) was observed for the first time by exposing it to ultraviolet light. The experiments results show that the absorption intensity of Sm2+ in the range of 500 similar to 6... The photochromism in CaS:Sm (from white to pink) was observed for the first time by exposing it to ultraviolet light. The experiments results show that the absorption intensity of Sm2+ in the range of 500 similar to 600nm was strongly increased after irradiation. This reveals that there is the valence changing of Sm. If the sample was excited by visible light again, the pink color turned to white, indicating that CaS:Sm has potential application in the field of storage material. 展开更多
关键词 photochromISM CaS : Sm valence transition storage material
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Fabrication of 2×2 Thermo-Optic Switches with Organic-Inorganic Hybrid Materials Prepared by Sol-Gel Technique
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作者 Xianjiang Wang, Lei Xu, Dongxiao Li, Liying Liu, and Wencheng WangState Key Lab for Advanced Photonic Materials and Devices, Department of Optical Science and Engineering, Fudan University, Shanghai 200433, P. R. China 《光学学报》 EI CAS CSCD 北大核心 2003年第S1期265-266,共2页
2×2 Mach-Zehnder interferometric thermo-optic switch was fabricated with organic/inorganic hybrid materials by sol-gel technique and direct UV patterning. The switching time of device was measured to be 4.2 ms an... 2×2 Mach-Zehnder interferometric thermo-optic switch was fabricated with organic/inorganic hybrid materials by sol-gel technique and direct UV patterning. The switching time of device was measured to be 4.2 ms and switching power 9.3 mW. 展开更多
关键词 of on by with Thermo-Optic Switches with organic-inorganic Hybrid materials Prepared by Sol-Gel Technique Fabrication of 2
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具有光致变色功能的PA6纳微米纤维的制备与性能
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作者 西鹏 常晓康 《天津工业大学学报》 CAS 北大核心 2024年第3期1-8,共8页
为制备具有光致变色功能的纳微米纤维,以萘并吡喃(NA)为变色单元,以甲基丙烯酸甲酯(MMA)为聚合物基质单体,以二氧化硅(SiO_(2))为包覆层,制备了光致变色纳微米微球PMMA/NA@SiO_(2),然后将PMMA/NA@SiO_(2)纳微米微球引入到尼龙6的静电纺... 为制备具有光致变色功能的纳微米纤维,以萘并吡喃(NA)为变色单元,以甲基丙烯酸甲酯(MMA)为聚合物基质单体,以二氧化硅(SiO_(2))为包覆层,制备了光致变色纳微米微球PMMA/NA@SiO_(2),然后将PMMA/NA@SiO_(2)纳微米微球引入到尼龙6的静电纺丝溶液中,通过对静电纺丝过程中的各工艺参数的优化,对PA6的基本形貌进行了在线调控,成功制备了直径分布较均匀的PA6纳微米变色纤维。场发射扫描电镜和紫外可见光分光光度计的测试结果表明:PMMA/NA@SiO_(2)的直径范围在100~210 nm之间;在PMMA/NA@SiO_(2)质量分数小于10%时,纤维样品的形貌无明显变化,变色性能随添加的变色材料的增加而增强,所制备的样品变色性能和纤维形貌最好,在紫外光照射后会呈现出较好的变色性能和耐疲劳性;通过紫外灯照射发现,相对于λ=365 nm的紫外光,λ=254 nm的紫外光对该光致变色纳微米纤维的变色性能影响较大。 展开更多
关键词 静电纺丝 光致变色材料 纳微米纤维 尼龙6
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