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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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Electrochromic & magnetic properties of electrode materials for lithium ion batteries 被引量:1
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作者 郭正飞 潘坤 王学进 《Chinese Physics B》 SCIE EI CAS CSCD 2016年第1期36-42,共7页
Progress in electrochromic lithium ion batteries (LIBs) is reviewed, highlighting advances and possible research di- rections. Methods for using the LIB electrode materials' magnetic properties are also described, ... Progress in electrochromic lithium ion batteries (LIBs) is reviewed, highlighting advances and possible research di- rections. Methods for using the LIB electrode materials' magnetic properties are also described, using several examples. Li4Ti5Ol2 (LTO) film is discussed as an electrochromic material and insertion compound. The opto-electrical proper- ties of the LTO film have been characterized by electrical measurements and UV-Vis spectra. A prototype bi-functional electrochromic LIB, incorporating LTO as both electrochromic layer and anode, has also been characterized by charge- discharge measurements and UV-Vis transmittance. The results show that the bi-functional electrochromic LIB prototype works well. Magnetic measurement has proven to be a powerful tool to evaluate the quality of electrode materials. We introduce briefly the magnetism of solids in general, and then discuss the magnetic characteristics of layered oxides, spinel oxides, olivine phosphate LiFePO4, and Nasicon-type Li3Fez(PO4)3. We also discuss what kind of impurities can be detected, which will guide us to fabricate high quality films and high performance devices. 展开更多
关键词 electrochromISM lithium ion batteries magnetic properties materials
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Spectroscopic Properties of Methyl Ketone Bridged Electrochromic Materials: a Quantum Chemical and Experimental Study
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作者 ZHENG Wen-Xuan WANG De-Lic ZHANG Yu-Mob 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2019年第4期489-498,共10页
Tuning accurately the color of electrochromic materials has been considered as a crucial step to achieve successful electrochromic display. In this paper, the effect of substitution on the color of methyl ketone bridg... Tuning accurately the color of electrochromic materials has been considered as a crucial step to achieve successful electrochromic display. In this paper, the effect of substitution on the color of methyl ketone bridged electrochromic materials has been investigated systematically by experimental and TDDFT methods. By screening 15 functional and 11 basis sets, a statistical method based on M052 X data is developed to estimate the maximum absorption wavelengths(λ_(max)) of electrochromic materials, based on analyzing λ_(max) of 18 molecules. For methyl ketone bridged electrochromic materials, the color from yellow to green and λ_(max) from 400 to 690 nm can be adjusted by electron-withdrawing functional group on Ar2 and electron-donating functional group on Ar1. This work not only exhibits the suitable method to predict the maximum absorption wavelength and color of electrochromic materials, but also inspires and accelerates further development of electrochromic materials for future displays. 展开更多
关键词 electrochromic materials electrobase electroacid METHYL KETONE DFT
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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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Correlation between lithium storage and diffusion properties and electrochromic characteristics of WO_3 thin films 被引量:2
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作者 于鹏飞 崔忠慧 +1 位作者 范武刚 郭向欣 《Chinese Physics B》 SCIE EI CAS CSCD 2013年第3期512-516,共5页
As essential electrochromic(EC) materials are related to energy savings in fenestration technology,tungsten oxide(WO3) films have been intensively studied recently.In order to achieve better understanding of the m... As essential electrochromic(EC) materials are related to energy savings in fenestration technology,tungsten oxide(WO3) films have been intensively studied recently.In order to achieve better understanding of the mechanism of EC properties,and thus facilitate optimization of device performance,clarification of the correlation between cation storage and transfer properties and the coloration performance is needed.In this study,transparent polycrystalline and amorphous WO3 thin films were deposited on SnO2:F-coated glass substrates by the pulsed laser deposition technique.Investigation into optical transmittance in a wavelength range of 400-800 nm measured at a current density of 130 μA·cm-2 with the applied potential ranging from 3.2 to 2.2 V indicates that polycrystalline films have a larger optical modulation of ~ 30% at 600 nm and a larger coloration switch time of 95 s in the whole wavelength range compared with amorphous films(~ 24% and 50 s).Meanwhile,under the same conditions,polycrystalline films show a larger lithium storage capacity corresponding to a Li/W ratio of 0.5,a smaller lithium diffusion coefficient(2×10-12cm2·s-1 for Li/W=0.24) compared with the amorphous ones,which have a Li/W ratio of 0.29 and a coefficient of ~2.5×10-11cm2·s-1 as Li/W=0.24.These results demonstrate that the large optical modulation relates to the large lithium storage capacity,and the fast coloration transition is associated with fast lithium diffusion. 展开更多
关键词 WO3 thin films electrochromic material lithium storage and diffusion
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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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Synergistic Effect and Electrochromic Mechanism of Nanoflake Li-doped NiO in LiOH Electrolyte 被引量:1
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作者 Kejun Xu Liuying Wang +4 位作者 Gu Liu Chaoqun Ge Long Wang Weichao Wang Mengzhou Chen 《Energy & Environmental Materials》 SCIE EI CAS CSCD 2023年第3期66-73,共8页
Inorganic metal oxide electrochromic materials have good application prospects for energy-saving windows in buildings and smart display applications.Therefore,the development of electrochromic films with good cycling ... Inorganic metal oxide electrochromic materials have good application prospects for energy-saving windows in buildings and smart display applications.Therefore,the development of electrochromic films with good cycling stabilities,fast color-change response times,and high coloring efficiencies has attracted considerable attention.In this study,nanoflake Li-doped NiO electrochromic films were prepared using a hydrothermal method,and the films exhibited superior electrochromic performances in the LiOH electrolyte.Li^(+)ions doping increased the ion transmission rates of the NiO films,and effectively promoted the transportation of ions from the electrolyte into NiO films.Meanwhile,the nanoflake microstructure caused the NiO films to have larger specific surface areas,providing more active sites for electrochemical reactions.It was determined that the NiO-Li20%film exhibited an ultra-fast response in the LiOH electrolyte(coloring and bleaching times reached 3 and 1.5 s,respectively).Additionally,the coloration efficiency was 62.1 cm^(2)C^(−1),and good cycling stability was maintained beyond 1500 cycles.Finally,the simulation calculation results showed that Li doping weakened the adsorption strengths of the NiO films to OH^(−),which reduced the generation and decomposition of NiOOH and helped to improve the cycling stabilities of the films.Therefore,the research presented in this article provides a strategy for designing electrochromic materials in the future. 展开更多
关键词 electrochromic materials Li-doped NiO films LiOH electrolyte nanoflake
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An overview of recent progress in the development of flexible electrochromic devices
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作者 Bin Wang Wu Zhang +4 位作者 Feifei Zhao William W.Yu Abdulhakem Y.Elezzabi Linhua Liu Haizeng Li 《Nano Materials Science》 EI CAS CSCD 2023年第4期369-391,共23页
Electrochromic materials are capable of reversibly switching their colors or optical properties through redox reactions under applied voltages,which have shown great potential applications including smart windows,none... Electrochromic materials are capable of reversibly switching their colors or optical properties through redox reactions under applied voltages,which have shown great potential applications including smart windows,nonemissive displays,optical filters,among others.Although the current rigid electrochromic devices have shown emerging interest and developed rapidly,many applications(e.g.,wearable/deformable optoelectronics)are blocked due to their inflexible features.Herein,the adaption of rigid electrochromic devices to flexible ones is of particular interest for the new era of smart optoelectronics.In this review,the current state-of-the-art achievements of flexible electrochromic devices(FECDs)are highlighted,along with their design strategies and the choice of electrochromic materials.The recent research progress of FECDs is reviewed in detail,and the challenges and corresponding solutions for real-world applications of FECDs are discussed.Furthermore,we summarize the basic fabrication strategies of FECDs and their potential applications.In addition,the development trend,the perspectives,and the outlook of FECDs are discussed at the end of this Review,which may provide recommendations and potential directions to advance the practical applications of FECDs. 展开更多
关键词 electrochromISM Flexible electrochromic devices OPTOELECTRONICS Optical materials
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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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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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EVALUATION AND PREDICTION OF ELECTROCHROMIC MATERIALS WITH PATTERN RECOGNITION
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作者 俞善庆 《Chinese Science Bulletin》 SCIE EI CAS 1990年第8期627-631,共5页
Ⅰ. INTRODUCTIONThe electrochromic materials’ spectral transmittance can be changed reversibly with applied electric current. Consequently, the goal of the optical modulation may be achieved. In recent years, there h... Ⅰ. INTRODUCTIONThe electrochromic materials’ spectral transmittance can be changed reversibly with applied electric current. Consequently, the goal of the optical modulation may be achieved. In recent years, there has been considerable interest in the development 展开更多
关键词 electrochromic materials PATTERN recognition.
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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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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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电致变色材料在智能运动服装中的应用
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作者 郭海静 丁雪莲 《毛纺科技》 CAS 北大核心 2024年第6期133-139,共7页
为实现电致变色材料与柔性器件的集成,设计出高性能、低成本和舒适性的智能运动服装。采用文献综述和比较分析的研究方法,对电致变色材料的基本原理、分类以及优越性进行了论述;分析了电致变色材料在智能运动服装中的温度调节功能和运... 为实现电致变色材料与柔性器件的集成,设计出高性能、低成本和舒适性的智能运动服装。采用文献综述和比较分析的研究方法,对电致变色材料的基本原理、分类以及优越性进行了论述;分析了电致变色材料在智能运动服装中的温度调节功能和运动状态监测功能等功能与应用。电致变色材料在智能运动服装领域展现巨大潜力,但电致变色材料在智能运动服装实际应用中仍面临一些挑战问题,如能耗高、响应速度慢和循环稳定性差等,提出针对性的解决方案,可为电致变色材料在智能运动服装中的应用提供可行性参考。 展开更多
关键词 电致变色材料 智能运动服装 可穿戴 电子元件
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电致变色材料微纳结构设计及多波段调控应用研究进展
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作者 蔡轩皓 娄兴 +1 位作者 覃继宁 周涵 《材料导报》 EI CAS CSCD 北大核心 2024年第21期1-7,共7页
电致变色材料具有在外电场下光响应性质可逆变化的特性,由于其响应可控、能耗小、多波段可兼容等优势在光热管理应用方面极具发展潜力。然而,传统的电致变色材料存在调控慢、变色单一、调控波段窄的局限性,限制了电致变色技术的进一步... 电致变色材料具有在外电场下光响应性质可逆变化的特性,由于其响应可控、能耗小、多波段可兼容等优势在光热管理应用方面极具发展潜力。然而,传统的电致变色材料存在调控慢、变色单一、调控波段窄的局限性,限制了电致变色技术的进一步发展。近年来,微纳结构化的电致变色材料实现了循环性能改善、灵活的响应光谱选择性等优势,成为一种行之有效的调控手段并引起了研究者重点关注。本文介绍了电致变色器件(ECD)的基本结构,并围绕扩散动力学、结构色设计、局域表面等离激元共振机理对近几年ECD结构设计的研究进展进行重点论述,分析了多波段兼容响应ECD潜在的应用前景。最后,总结了电致变色材料目前面临的挑战并展望其未来发展方向。 展开更多
关键词 电致变色材料 微纳结构设计 多波段兼容响应 扩散动力学 结构色设计 局域表面等离激元共振
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电致变色纤维材料的研究进展
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作者 蒋何鹏 胡敏 +1 位作者 涂虎 张如全 《化工新型材料》 CAS CSCD 北大核心 2024年第2期11-15,共5页
电致变色纤维材料因其独特的电致变色性、结构稳定性、耐久性等优点而受到广泛关注。根据电致变色纤维材料组成成分进行分类介绍并概括其研究进展,介绍各类电致变色纤维材料的性能,对结构稳定性、变色速率、色彩变化、着色深度等复合型... 电致变色纤维材料因其独特的电致变色性、结构稳定性、耐久性等优点而受到广泛关注。根据电致变色纤维材料组成成分进行分类介绍并概括其研究进展,介绍各类电致变色纤维材料的性能,对结构稳定性、变色速率、色彩变化、着色深度等复合型电致变色材料的特点进行分析,并对其未来发展趋势进行展望。绿色环保、多功能、舒适安全将成为下一代电致变色纤维材料的重点发展方向。 展开更多
关键词 电致变色 纤维 复合材料 结构稳定性 着色响应速率
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N-2-氰乙基吡咯/3,4-乙烯二氧噻吩电致变色共聚物的制备及性能
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作者 李慧娴 孙肖梦 +4 位作者 许天旭 邢小静 杜宪超 邱东方 程新峰 《精细化工》 EI CAS CSCD 北大核心 2024年第12期2645-2651,2659,共8页
以N-2-氰乙基吡咯(CNPy)和3,4-乙烯二氧噻吩(EDOT)为原料,通过电化学聚合制备了导电聚合物P(CNPy-co-EDOT)膜。采用FTIR、SEM、电化学工作站、UV-Vis吸收光谱对P(CNPy-co-EDOT)膜进行了表征,通过光谱电化学法,探究了n(CNPy)∶n(EDOT)对P... 以N-2-氰乙基吡咯(CNPy)和3,4-乙烯二氧噻吩(EDOT)为原料,通过电化学聚合制备了导电聚合物P(CNPy-co-EDOT)膜。采用FTIR、SEM、电化学工作站、UV-Vis吸收光谱对P(CNPy-co-EDOT)膜进行了表征,通过光谱电化学法,探究了n(CNPy)∶n(EDOT)对P(CNPy-co-EDOT)膜电致变色转换和开路稳定性的影响。结果表明,EDOT的引入能够显著提高CNPy的合成膜能力,形成了具有电化学氧化还原活性和光学吸收特性的P(CNPy-co-EDOT)膜;P(CNPy-co-EDOT)膜具有较低的禁带宽度(1.70~2.32 e V)和利于电解质离子传输的多孔状颗粒堆积结构;由n(CNPy)∶n(EDOT)=3∶7制备的P(CNPy_(3)-co-EDOT_(7))膜具有显著的多色电致变色特性,在不同外加电压下,呈现出黄褐色(–0.8 V)、草绿色(0.4 V)到蓝色(1.0 V)的丰富颜色变化;P(CNPy_(3)-co-EDOT_(7))膜的光学对比度为35.7%,响应时间为0.76 s,着色效率为219.6 cm^(2)/C;P(CNPy_(3)-co-EDOT_(7))膜在氧化态和还原态的透过率几乎没有变化,能维持原来的色泽,不会出现显著的褪色现象,显示出优异的光存储性能。 展开更多
关键词 导电聚合物 氰乙基吡咯 3 4-乙烯二氧噻吩 电化学聚合 电致变色 功能材料
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Active and passive modulation of solar light transmittance in a uniquely multifunctional dual-band single molecule for smart window applications
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作者 Pooja V.Chavan Pramod V.Rathod +2 位作者 Joohyung Lee Sergei V.Kostjuk Hern Kim 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2024年第1期293-305,I0007,共14页
Functional materials may change color by heat and electricity separately or simultaneously in smart windows.These materials have not only demonstrated remarkable potential in the modulation of solar radiation but are ... Functional materials may change color by heat and electricity separately or simultaneously in smart windows.These materials have not only demonstrated remarkable potential in the modulation of solar radiation but are also leading to the development of indoor environments that are more comfortable and conducive to improving individuals'quality of life.Unfortunately,dual-responsive materials have not received ample research attention due to economic and technological challenges.As a consequence,the broader utilization of smart windows faces hindrances.To address this new generational multistimulus responsive chromic materials,our group has adopted a developmental strategy to create a poly(NIPAM)n-HV as a switchable material by anchoring active viologen(HV)onto a phase-changing poly(NIPAM)n-based smart material for better utility and activity.These constructed smart windows facilitate individualistic reversible switching,from a highly transparent state to an opaque state(thermochromic)and a red state(electrochromic),as well as facilitate a simultaneous dual-stimuli response reversible switching from a clear transparent state to a fully opaque(thermochromic)and orange(electrochromic)states.Absolute privacy can be attained in smart windows designed for exclusive settings by achieving zero transmittance.Each unique chromic mode operates independently and modulates visible and near-infrared(NIR)light in a distinct manner.Hence,these smart windows with thermal and electric dual-stimuli responsiveness demonstrate remarkable heat regulation capabilities,rendering them highly attractive for applications in building facades,energy harvesting,privacy protection,and color display. 展开更多
关键词 Smart windows THERMOCHROMISM electrochromISM Energy saving Dual-responsive material
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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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