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微波辅助sol-gel法合成Bi_(0.5)Na_(0.5)TiO_(3)粉体及其压电性能研究
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作者 武家莹 刘佳 +3 位作者 胡月 房国丽 郭小雷 范玉杰 《宁夏大学学报(自然科学版)》 CAS 2024年第2期218-224,共7页
采用微波辅助溶胶-凝胶(sol-gel)法制备Bi_(0.5)Na_(0.5)TiO_(3)(BNT)粉体,通过DSC/TG,XRD,SEM,FT-IR等表征方法,分析BNT的反应历程,煅烧温度对BNT成分、晶粒尺寸和压电性能的影响.结果表明,当微波煅烧温度为650℃时,可合成出高纯度BNT... 采用微波辅助溶胶-凝胶(sol-gel)法制备Bi_(0.5)Na_(0.5)TiO_(3)(BNT)粉体,通过DSC/TG,XRD,SEM,FT-IR等表征方法,分析BNT的反应历程,煅烧温度对BNT成分、晶粒尺寸和压电性能的影响.结果表明,当微波煅烧温度为650℃时,可合成出高纯度BNT粉体(30~120 nm),其居里温度为394℃,d_(33)=7.5 pC/N,ε_(r)=535.58,tanδ=0.29.对比传统马弗炉煅烧sol-gel法,微波辅助sol-gel法有利于提高BNT的介电性能和居里温度,降低介质损耗. 展开更多
关键词 钛酸铋钠 溶胶-凝胶(sol-gel)法 微波烧结 介电损耗 压电性能
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Sol-gel synthesis of nanometer silicon/silicon suboxide/carbon anode material
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作者 QIN Tong WANG Zheng LI Zhengzheng 《Baosteel Technical Research》 CAS 2024年第2期12-18,共7页
A stacked Si/SiO_(x)/C composite anode material with carbon-coated structure was prepared by sol-gel method combined with carbothermal reduction using organic silicon.The results of X-ray diffractometry, scanning elec... A stacked Si/SiO_(x)/C composite anode material with carbon-coated structure was prepared by sol-gel method combined with carbothermal reduction using organic silicon.The results of X-ray diffractometry, scanning electron microscopy, and elemental analysis show that the Si/SiO_(x)/C material is a secondary particle with a porous micronanostructure, and the presence of nanometer silicon does not affect the carbothermal reduction and carbon coating.Electrochemical test results indicate that the specific capacity and first coulombic efficiency of SiO_(x)/C composite with nanometer silicon can be increased to 1 946.05 mAh/g and 76.49%,respectively.The reversible specific capacity of Si/SiO_(x)/C material blended with graphite is 749.69 mAh/g after 100 cycles at a current density of 0.1 C,and the capacity retention rate is up to 89.03%.Therefore, the composite has excellent electrochemical cycle stability. 展开更多
关键词 sol-gel method nanometer silicon silicon suboxide anode material
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Development of Modified Glasses by Transparent, Functional Hybrid Sol-Gel Nano-Ceramic Coatings, a Comparative Study
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作者 Md. Barkat Ullah Yeasmin Akter +1 位作者 Khodeja Afrin Md. Saiful Quddus 《World Journal of Engineering and Technology》 2024年第1期170-184,共15页
This paper concentrates on the development of glasses with self-cleaning surfaces exhibiting high water contact angles. In this study, we prepared super-hydrophobic nano-ceramic coated glass based on titania & sil... This paper concentrates on the development of glasses with self-cleaning surfaces exhibiting high water contact angles. In this study, we prepared super-hydrophobic nano-ceramic coated glass based on titania & silica using simple sol-gel & dip coating methods and studied the best composition of the coatings by altering ratios of titanium tetraisopropoxide (TTIP)/tetraethyl orthosilicate (TEOS) with different homogenizing agents. We characterized the coatings by surface roughness measurement, percentage of optical transmission, static contact angle, near-infrared (NIR) transmission, and diffuse reflectance. The fabrication of coatings on glass substrates played an important role in increasing the water contact angle of about 95° and visible & NIR transmission of about 90%. We compared our modified glass substrate with commercial low emissivity (Low E) glass using X-ray diffraction (XRD) analysis, which showed pure amorphous surface claiming excellent wettability and thus the prepared glass substrate could have a variety of applications in different fields. 展开更多
关键词 sol-gel Nano-Ceramic Coatings Self-Cleaning Glass Water Contact Angle Optical Transmission
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Sol-gel-based porous Ti-doped tungsten oxide films for high-performance dual-band electrochromic smart windows 被引量:1
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作者 Qiancheng Meng Sheng Cao +6 位作者 Juquan Guo Qingke Wang Ke Wang Tao Yang Ruosheng Zeng Jialong Zhao Bingsuo Zou 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2023年第2期137-143,I0004,共8页
Dual-band electrochromic smart windows(DESWs)with independent control of the transmittance of near-infrared and visible light show great potential in the application of smart and energy-saving buildings.The current st... Dual-band electrochromic smart windows(DESWs)with independent control of the transmittance of near-infrared and visible light show great potential in the application of smart and energy-saving buildings.The current strategy for building DESWs is to screen materials for composite or prepare plasmonic nanocrystal films.These rigorous preparation processes seriously limit the further development of DESWs.Herein,we report a facile and effective sol-gel strategy using a foaming agent to achieve porous Ti-doped tungsten oxide film for the high performance of DESWs.The introduction of foaming agent polyvinylpyrrolidone during the film preparation can increase the specific surface area and free carrier concentration of the films and enhance their independent regulation ability of near-infrared electrochromism.As a result,the optimal film shows excellent dual-band electrochromic properties,including high optical modulation(84.9%at 633 nm and 90.3%at 1200 nm),high coloration efficiency(114.9 cm^(2) C^(-1) at 633 nm and 420.3 cm^(2) C^(-1) at 1200 nm),quick switching time,excellent bistability,and good cycle stability(the transmittance modulation losses at 633 and 1200 nm were 11%and 3.5%respectively after 1000 cycles).A demonstrated DESW fabricated by the sol-gel film showed effective management of heat and light of sunlight.This study represents a significant advance in the preparation of dual-band electrochromic films,which will shed new light on advancing electrochromic technology for future energy-saving smart buildings. 展开更多
关键词 ELECTROCHROMISM Tungsten oxide Smart windows sol-gel method Dual-band absorption
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Comparative structural and electrochemical properties of mixed P2/O′3-layered sodium nickel manganese oxide prepared by sol-gel and electrospinning methods:Effect of Na-excess content 被引量:2
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作者 Thongsuk Sichumsaeng Atchara Chinnakorn +3 位作者 Ornuma Kalawa Jintara Padchasri Pinit Kidkhunthod Santi Maensiri 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2023年第10期1887-1896,共10页
The effect of Na-excess content in the precursor on the structural and electrochemical performances of sodium nickel manganese oxide(NNMO)prepared by sol-gel and electrospinning methods is investigated in this paper.X... The effect of Na-excess content in the precursor on the structural and electrochemical performances of sodium nickel manganese oxide(NNMO)prepared by sol-gel and electrospinning methods is investigated in this paper.X-ray diffraction results of the prepared NNMO without adding Na-excess content indicate sodium loss,while the mixed phase of P2/O′3-type layered NNMO presented after adding Na-excess content.Compared with the sol-gel method,the secondary phase of NiO is more suppressed by using the electrospinning method,which is further confirmed by field emission scanning electron microscope images.N_(2) adsorption-desorption isotherms show no remarkably difference in specific surface areas between different preparation methods and Na-excess contents.The analysis of X-ray absorption near edge structure indicates that the oxidation states of Ni and Mn are+2 and+4,respectively.For the electrochemical properties,superior electrochemical performance is observed in the NNMO electrode with a low Na-excess content of 5wt%.The highest specific capacitance is 36.07 F·g^(-1)at0.1 A·g^(-1)in the NNMO electrode prepared by using the sol-gel method.By contrast,the NNMO electrode prepared using the electrospinning method with decreased Na-excess content shows excellent cycling stability of 100%after charge-discharge measurements for 300 cycles.Therefore,controlling the Na excess in the precursor together with the preparation method is important for improving the electrochemical performance of Na-based electrode materials in supercapacitors. 展开更多
关键词 sodium nickel manganese oxide mixed P2/O′3-type Na-excess content sol-gel method electrospinning method electrochemical properties
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Investigation of UV photosensor properties of Al-doped SnO_(2) thin films deposited by sol-gel dip-coating method
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作者 Kaour Selma Benkara Salima +2 位作者 Bouabida Seddik Rechem Djamil Hadjeris Lazhar 《Journal of Semiconductors》 EI CAS CSCD 2023年第3期114-123,共10页
Transparent conducting aluminum doped tin oxide thin films were prepared by sol-gel dip coating method with differ-ent Al concentrations and characterized by X-ray diffraction (XRD), atomic force microscopy (AFM), UV-... Transparent conducting aluminum doped tin oxide thin films were prepared by sol-gel dip coating method with differ-ent Al concentrations and characterized by X-ray diffraction (XRD), atomic force microscopy (AFM), UV-Vis spectrophotometry and photoconductivity study. The variation observed in the properties of the measured films agrees with a difference in the film's thickness, which decreases when Al concentration augments. X-ray diffraction analysis reveals that all films are polycrystal-line with tetragonal structure, (110) plane being the strongest diffraction peak. The crystallite size calculated by the Debye Scher-rer’s formula decreases from 11.92 to 8.54 nm when Al concentration increases from 0 to 5 wt.%. AFM images showed grains uni-formly distributed in the deposited films. An average transmittance greater than 80% was measured for the films and an en-ergy gap value of about 3.9 eV was deduced from the optical analysis. Finally, the photosensitivity properties like current-voltage characteristics, ION/IOFF ratio, growth and decay time are studied and reported. Also, we have calculated the trap depth energy using the decay portion of the rise and decay curve photocurrent. 展开更多
关键词 tin oxide thin films sol-gel UV photodetector photoconductivity trap depth
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Structural evolution-enabled BiFeO3 modulated by strontium doping with enhanced dielectric,optical and superparamagnetic properties by a modified sol-gel method
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作者 Sharon V S Veena Gopalan E Malini K A 《Chinese Physics B》 SCIE EI CAS CSCD 2023年第3期521-530,共10页
Multiferroic(BFO)nanoparticles doped with strontium with the general formula Bi1-xSrx FeO3(x=0,0.3,0.5,0.7)were synthesized using a modified sol-gel auto-combustion process.The structural,electrical,optical,and magnet... Multiferroic(BFO)nanoparticles doped with strontium with the general formula Bi1-xSrx FeO3(x=0,0.3,0.5,0.7)were synthesized using a modified sol-gel auto-combustion process.The structural,electrical,optical,and magnetic properties of the samples are discussed.The structural analysis,carried out using the x-ray powder diffraction technique,shows a structural transition from rhombohedral(R-3c)to cubic(Pm-3m)for the doping amount of strontium(Sr)equal to x=0.3.Morphological analysis of the prepared samples were carried out using scanning electron microscopy(SEM).Frequency-dependent dielectric constant and ac conductivity were studied.The doped samples,with improved dielectric properties,can be used to fabricate different optoelectronic devices.Strong dielectric dispersion and broad relaxation were exhibited by all the samples.Cole–Cole plots were employed as an effective tool to study the dispersion parameters,namely,the optical dielectric constant,static dielectric constant,relaxation time,and spreading factor.The activation energy was calculated from the relaxation peaks and Cole–Cole plots,which were found to be compatible with each other.The bandgap of the samples was calculated using diffuse reflectance spectral(DRS)analysis.Sharp and strong photoluminescence in the IR region was observed in the samples,similar to ZnO,which was reported for the first time.Room-temperature and low-temperature magnetization studies point towards the superparamagnetic nature of the samples,with an improvement in magnetic properties with doping.The antiferromagnetic behavior of bulk bismuth ferrite transforms to superparamagnetic in nature for both pure and Sr-substituted bismuth ferrite nanoparticles due to the close dimensions of crystallite size with magnetic domains leading to the break-down of the frustrated spin cycloidal moment. 展开更多
关键词 MULTIFERROICS sol-gel process x-ray spectra optical and dielectric properties
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Application of g-C_(3)N_(4)/sol-gel nanocomposite on AM60B magnesium alloy and investigation of its properties
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作者 Roghaye Samadianfard Davod Seifzadeh Burak Dikici 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2023年第6期1113-1127,共15页
To protect the AM60B magnesium alloy from corrosion,a sol-gel coating containing hydroxylated g-C_(3)N_(4)nanoplates was applied.The chemical composition of the hydroxylated g-C_(3)N_(4)nanoplates was investigated usi... To protect the AM60B magnesium alloy from corrosion,a sol-gel coating containing hydroxylated g-C_(3)N_(4)nanoplates was applied.The chemical composition of the hydroxylated g-C_(3)N_(4)nanoplates was investigated using X-ray photoelectron spectroscopy(XPS).The hydroxylation process did not affect the crystal size,specific surface area,pore volume,average pore diameter,and thermal stability of the g-C_(3)N_(4)nanoplates.After incorporating pristine and hydroxylated g-C_(3)N_(4)nanoplates,dense sol-gel coatings were obtained.Transmission electron microscopy(TEM)revealed the uniform distribution of the modified g-C_(3)N_(4)in the coating.The average roughness of the coating was also reduced after adding the modified nanoplates due to the decreased aggregation tendency.Electrochemical impedance spectroscopy(EIS)examinations in simulated acid rain revealed a significant improvement in the anticorrosion properties of the sol-gel film after the addition of the modified g-C_(3)N_(4)due to the chemical bonding of the coating to the nanoplates. 展开更多
关键词 Mg alloy corrosion protection sol-gel g-C_(3)N_(4)nanocomposite electrochemical impedance spectroscopy
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Sol-Gel法制备ZnO压敏陶瓷及其电性 被引量:30
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作者 刘素琴 黄可龙 +1 位作者 宋志方 彭斌 《无机材料学报》 SCIE EI CAS CSCD 北大核心 2000年第2期376-380,共5页
采用溶胶-凝胶(sol-gel)工艺制备ZnO电压敏陶瓷粉体.探讨其制备的最佳工艺条件:以 Zn(NO3)2与 NaOH为反应前驱物制取胶体, Zn2+浓度控制在 0.5mol·L-1以上, pH值7.5左右,预烧温... 采用溶胶-凝胶(sol-gel)工艺制备ZnO电压敏陶瓷粉体.探讨其制备的最佳工艺条件:以 Zn(NO3)2与 NaOH为反应前驱物制取胶体, Zn2+浓度控制在 0.5mol·L-1以上, pH值7.5左右,预烧温度300℃,陶瓷烧结温度1200℃;制得的压敏电阻的非线性系数α=28;研究了稀土La2O3掺杂对该陶瓷电性的影响:低浓度掺杂时,可提高压敏电压,高浓度掺杂时;不呈现压敏特性;对粉体进行了X射线衍射和透射电镜分析,预烧后得到五元掺杂的ZnO粉体粒形呈球状,属六方晶系,粒径分布窄,约为40~80nm. 展开更多
关键词 ZnO陶瓷 sol-gel 压敏电阻
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TiO_2的微波辐射Sol-Gel法制备及其光催化性能 被引量:8
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作者 夏启斌 李忠 +2 位作者 奚红霞 徐科峰 肖静 《华南理工大学学报(自然科学版)》 EI CAS CSCD 北大核心 2003年第11期92-96,共5页
采用微波辐射Sol Gel法在石英砂表面制备负载型TiO2 光催化剂 ,考察不同加热方式 ,微波功率以及微波加热温度对溶胶质量的影响 ,微波加热反应制备的溶胶粒子平均粒径小于常规加热反应制备得到的溶胶粒子 ,微波加热反应适宜条件是微波功... 采用微波辐射Sol Gel法在石英砂表面制备负载型TiO2 光催化剂 ,考察不同加热方式 ,微波功率以及微波加热温度对溶胶质量的影响 ,微波加热反应制备的溶胶粒子平均粒径小于常规加热反应制备得到的溶胶粒子 ,微波加热反应适宜条件是微波功率6 0 0W ,反应温度为 90℃ .以苯酚为光催化降解研究对象 ,考察了两种方式制备的负载型TiO2 光催化剂的催化性能 ,实验结果表明微波辐射Sol Gol法制备的负载型TiO2 光催化剂光催化性能也优于常规Sol Gel法制备的负载型TiO2 光催化剂 . 展开更多
关键词 二氧化钛 微波 sol-gel 光催化
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Sol-Gel技术与纳米材料的化学剪裁 被引量:50
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作者 孙继红 张晔 +2 位作者 范文浩 吴东 孙予罕 《化学进展》 SCIE CAS CSCD 1999年第1期80-85,共6页
本文以SiO2纳米材料为实例,阐述了sol-gel化学的基本概念,讨论了SiO2纳米材料在结构剪裁和性能调控方面的研究进展和前沿问题,并指出sol-gel技术已经成为实现化学剪裁合成纳米材料的主要手段。
关键词 纳米技术 sol-gel 化学裁剪 纳米材料 二氧化硅
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不同Ti/Ba摩尔比的钛酸钡纳米晶粉体的Sol-gel法制备与表征 被引量:18
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作者 吴淑荣 李东升 +1 位作者 畅柱国 熊为淼 《功能材料》 EI CAS CSCD 北大核心 1999年第2期179-181,共3页
采用Sol-gel法制备了不同Ti/Ba摩尔比的BayTixO3(x/y=0.990,1.000,1.010,1.020,1.045)纳米晶粉体。应用热分析、X射线粉末衍射、激光和透射电镜等技术对干凝胶热分解历程和粉... 采用Sol-gel法制备了不同Ti/Ba摩尔比的BayTixO3(x/y=0.990,1.000,1.010,1.020,1.045)纳米晶粉体。应用热分析、X射线粉末衍射、激光和透射电镜等技术对干凝胶热分解历程和粉体性能进行了研究,发现随Ti/Ba摩尔比的增加,粉体的平均晶粒尺寸、晶体结构和粉体粒度分布各呈现规律性变化。 展开更多
关键词 钛酸钡 纳米晶粉体 Ti/Ba摩尔比 sol-gel 表征
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纳米晶钛酸钡的Sol-gel法制备及其尺寸效应 被引量:22
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作者 郭惠芬 张兴堂 +3 位作者 刘兵 李蕴才 黄亚彬 杜祖亮 《物理化学学报》 SCIE CAS CSCD 北大核心 2004年第2期164-168,共5页
采用sol-gel法制备了不同粒径的钛酸钡(BT)纳米晶粉.XRD、Raman光谱和DSC测试结果显示,随着退火温度的升高,晶粒长大,晶胞的a轴逐渐减小,c轴逐渐增大.粒径在54nm左右时,钛酸钡由顺电立方相向铁电四方相结构转变,在立方-四方相变过程中,... 采用sol-gel法制备了不同粒径的钛酸钡(BT)纳米晶粉.XRD、Raman光谱和DSC测试结果显示,随着退火温度的升高,晶粒长大,晶胞的a轴逐渐减小,c轴逐渐增大.粒径在54nm左右时,钛酸钡由顺电立方相向铁电四方相结构转变,在立方-四方相变过程中,晶胞略微膨胀.随着粒径的减小,正交-四方相变温度升高,四方-立方相变温度降低,Raman谱峰降低和宽化,粒径为38nm左右时四方相的特征峰消失. 展开更多
关键词 纳米晶钛酸钡 sol-gel 制备 尺寸效应 相变 铁电性 晶胞参数
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多孔氧化铝模板结合sol-gel旋转涂敷法制备PZT纳米管 被引量:6
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作者 宋晔 蒋龙飞 +4 位作者 戚卫星 路超 朱绪飞 杭启明 朱信华 《功能材料》 EI CAS CSCD 北大核心 2012年第12期1605-1609,共5页
利用溶胶-凝胶旋转涂敷法在通孔的多孔阳极氧化铝(PAA)模板中制备了锆钛酸铅(PZT)纳米管,研究了溶胶浓度对样品形貌的影响。利用SEM和TEM观察了纳米管阵列和单根纳米管的形貌,采用XRD和EDS图谱分析了纳米管的相结构和化学元素组成。结... 利用溶胶-凝胶旋转涂敷法在通孔的多孔阳极氧化铝(PAA)模板中制备了锆钛酸铅(PZT)纳米管,研究了溶胶浓度对样品形貌的影响。利用SEM和TEM观察了纳米管阵列和单根纳米管的形貌,采用XRD和EDS图谱分析了纳米管的相结构和化学元素组成。结果表明合成的PZT纳米管结晶良好,具有钙钛矿结构(属于四方晶系);纳米管具有较高的韧性但表面较粗糙,直径和管壁厚度分别约为75和7nm,直径与原始PAA模板的孔径相吻合。在一定范围内调节PZT溶胶的浓度(0.1~0.4mol/L),均能在PAA模板的孔洞中形成PZT多晶纳米管,且组成PZT纳米管的晶粒随着溶胶浓度的增加而变大。 展开更多
关键词 氧化铝模板 sol-gel PZT 纳米管 制备
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Sol-Gel法合成HAP的结晶特征及其对F^-离子吸附性能研究 被引量:34
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作者 黄志良 刘羽 +2 位作者 王大伟 张术根 陈露军 《无机材料学报》 SCIE EI CAS CSCD 北大核心 2001年第4期661-666,共6页
用sol-gel法合成了具有纳米级尺寸的HAP;采用XRD,IR,BET比表面积测定,静、动态吸附等方法研究了不同Ca/P摩尔比和煅烧温度合成的HAP的比表面积、结晶度、晶粒尺寸、晶格缺陷度、热稳定性、平衡吸氟量;探... 用sol-gel法合成了具有纳米级尺寸的HAP;采用XRD,IR,BET比表面积测定,静、动态吸附等方法研究了不同Ca/P摩尔比和煅烧温度合成的HAP的比表面积、结晶度、晶粒尺寸、晶格缺陷度、热稳定性、平衡吸氟量;探讨了吸氟机理和行为.结果表明:sol-gel法合成的HAP在常温、常压、不调pH的操作条件下,有较大的吸氟能力,且无二次污染,可作为绿色环境材料. 展开更多
关键词 sol-gel 羟基磷灰石 氟离子 阴离子交换吸附 废水处理 结晶特征
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Sol-Gel法制备PZT薄膜及其抗疲劳性能研究进展 被引量:4
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作者 刘大格 张洪喜 +2 位作者 王中 蔡伟 赵连城 《压电与声光》 CSCD 北大核心 1998年第4期276-282,共7页
综述了Sol-Gel法制备PZT系列铁电薄膜各种因素对薄膜微结构及性能的影响,分析了铁电薄膜极化疲劳微观机制,提出了优化的工艺条件及极化疲劳改善方法。
关键词 PZT 铁电薄膜 sol-gel 疲劳
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纳米掺铁二氧化钛的sol-gel法制备与表征(Ⅰ)热重红外联用分析掺铁二氧化钛凝胶的热分解和晶化特性 被引量:20
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作者 岳林海 刘清 +1 位作者 徐铸德 水淼 《无机化学学报》 SCIE CAS CSCD 北大核心 2000年第6期933-938,共6页
本文通过热分析、红外联用和 X射线衍射分析了不同煅烧温度下的纳米掺铁二氧化钛样品,研究了 sol-gel方法制备的纯二氧化钛和掺铁二氧化钛干凝胶的热分解和晶化过程。结果表明,干凝胶有较为明显的两个阶段的热分解。在实验条件下得到... 本文通过热分析、红外联用和 X射线衍射分析了不同煅烧温度下的纳米掺铁二氧化钛样品,研究了 sol-gel方法制备的纯二氧化钛和掺铁二氧化钛干凝胶的热分解和晶化过程。结果表明,干凝胶有较为明显的两个阶段的热分解。在实验条件下得到的二氧化钛干凝胶粉为无定形,无定形二氧化钛加热晶化过程是一个持续的过程,没有明显的晶化温度。 展开更多
关键词 sol-gel 热分析 晶粒度 掺铁二氧化钛 纳米材料
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Sol-gel法制备纳米SnO_2气敏材料的研究 被引量:20
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作者 张忠锁 张兴堂 +4 位作者 陈艳辉 田宝丽 程轲 黄亚彬 杜祖亮 《光谱学与光谱分析》 SCIE EI CAS CSCD 北大核心 2003年第1期98-100,共3页
用Sol gel法制备SnO2 纳米粒子 ,并用XRD、紫外吸收光谱和激光Raman光谱进行了表征和分析。XRD实验证实了所制备的粒子具有较理想的纳米尺寸 ,其粒径随热退火温度升高而增大 ;Raman光谱表明 ,低温退火时SnO2 纳米材料的氧缺位较大 ;紫... 用Sol gel法制备SnO2 纳米粒子 ,并用XRD、紫外吸收光谱和激光Raman光谱进行了表征和分析。XRD实验证实了所制备的粒子具有较理想的纳米尺寸 ,其粒径随热退火温度升高而增大 ;Raman光谱表明 ,低温退火时SnO2 纳米材料的氧缺位较大 ;紫外吸收光谱表明退火温度在 30 0~ 5 0 0℃粒径变化很大 ,但光的吸收稳定不变。可望利用这些性质 ,提高SnO2 气敏器件的性能。 展开更多
关键词 sol-gel 制备 纳米SNO2 气敏材料 二氧化锡 溶胶-凝胶
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Surface modification of NiTi alloy by sol-gel derived porous TiO_(2)film 被引量:3
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作者 付涛 吴晓明 +3 位作者 吴锋 罗孟 董兵辉 纪元 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2012年第7期1661-1666,共6页
Titania films with nano-sized pores were prepared on the NaOH?HCl pretreated NiTi alloy substrate by sol?gel method.A crack-free film is obtained for the sample with a dense inner layer and a porous outside layer(s... Titania films with nano-sized pores were prepared on the NaOH?HCl pretreated NiTi alloy substrate by sol?gel method.A crack-free film is obtained for the sample with a dense inner layer and a porous outside layer(sample TC1+1).The X-ray diffraction shows that the titania films are composed of anatase,and a little Ni4Ti3 phase in the heat treated substrate is also detected.The X-ray photoelectron spectroscopy results indicate that the titania film completely covered the NiTi substrate for sample TC1+1.The sample TC1+1 is hydrophilic with a contact angle about 20°,and UV illumination treatment for 15 min further decreases the contact angle to(9.2±3.2)°.The potentiodynamic polarization test in 0.9% NaCl solution reveals a better corrosion resistance of sample TC1+1 than the polished NiTi sample. 展开更多
关键词 NiTi alloy TITANIA sol-gel method HYDROPHILICITY corrosion resistance
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Fabrication and Characterization of LiFePO4 Nanotubes by a Sol-gel-AAO Template Process 被引量:4
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作者 刘晓红 王金清 +1 位作者 张俊彦 杨生荣 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 北大核心 2006年第6期530-534,共5页
The LiFePO4 nanotubes were successfully fabricated by a sol-gel method with porous anodic aluminum oxide as the template. Transmission electron microscopy and scanning electron microscopy showed that the synthesized L... The LiFePO4 nanotubes were successfully fabricated by a sol-gel method with porous anodic aluminum oxide as the template. Transmission electron microscopy and scanning electron microscopy showed that the synthesized LiFeP04 nanotubes were monodispersed and parallel to one another. Selected area electron diffraction pattern, X-ray diffraction and X-ray photoelectron spectroscopy investigations jointly demonstrated that the synthesized LiFePO4 nanotubes were pure olivine structure. This approach offered a potentially way for fabricating ordered LiFePO4 nanotubes at room temperature and ambient conditions, which might be expected to find promising application as a new cathode material in lithium ion battery, 展开更多
关键词 LIFEPO4 AAO template sol-gel Lithium ion battery
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