无定形二氧化钛修饰二氧化钛光子晶体电极及其光电性能  

Photoelectric Performance of Amorphous Titanium Dioxide Modified Titanium Dioxide Photonic Crystal Electrode

作　　者：蒋佳洁 谢新媛 李风煜 JIANG Jiajie;XIE Xinyuan;LI Fengyu(Center for Industrial Analysis and Testing,Guangdong Academy of Sciences,Guangzhou 510000,China;College of Chemistry and Material Science,Jinan University,Guangzhou 510000,China)

机构地区：[1]广东省科学院工业分析检测中心,广州510000 [2]暨南大学化学与材料学院,广州510000

出　　处：《硅酸盐学报》2025年第1期95-101,共7页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(22474049)。

摘　　要：随着太阳能广泛应用,寻找优良的光电转换材料一直为太阳能研究的重点。通过模板法和溶胶凝胶法在氟掺杂氧化锡上组装二氧化钛反蛋白石光子晶体,再在其晶体骨架低温沉积无定形二氧化钛形成无定型二氧化钛修饰的二氧化钛反蛋白石光子晶体电极。采用X射线衍射仪、X射线光电子能谱及扫描电子显微镜进行晶型、禁带及形貌表征;对电极进行光电流测试,并探讨了光电流增强原理。结果证明经过无定形二氧化钛修饰的二氧化钛反蛋白石光子晶体电极,不仅具有高比表面积,还降低了光生电子空穴的复合,使得电极光电流达到600 nA,比未修饰前提高了4倍。为基于非晶二氧化钛光电转换材料的应用提供了新思路。Introduction Titanium dioxide(TiO_(2))is used as a photoelectric conversion material due to its non-toxicity,good photothermal stability and low cost.However,TiO_(2) has a wide electron bandgap,and its photo-generated electrons and holes are easy to recombine.The photoelectric performance of TiO_(2) is often improved via increasing the specific surface area,speeding up the axial transport of electrons.In this paper,titanium dioxide inverse opal photonic crystals(TiO_(2) IOPCs)were selected as photoelectric conversion materials due to the advantages of large specific surface area and promoted light absorption.TiO_(2) IOPCs were prepared by a template method and a sol–gel method.Also,TiO_(2) IOPCs was modified with amorphous titanium dioxide(A-TiO_(2)).Methods Self-assembled opal photonic crystals on fluorine-doped tin oxide(FTO)were used as templates.The precursor liquid prepared with isopropyl titanate,ethanol,acetyl acetone,hydrochloric acid and deionized water was filled into the gap of opal photonic crystal.After the sol in the opal crystal gap was dried and gelled,the electrode was calcined at 450℃to remove the opal photonic crystals template to obtain TiO_(2) IOPCs.Afterwards,amorphous titanium dioxide modified titanium dioxide inverse opal photonic crystals(A-TiO_(2)/TiO_(2) IOPCs)were prepared via placing TiO_(2) IOPCs electrodes into TiCl_(4) aqueous solution at a low temperature without stirring.The phase composition,elemental composition,energy level structure and morphology of the electrode were analyzed by X-ray diffraction(XRD),X-ray electron spectroscopy(XPS),ultraviolet visible spectrophotometry(UV–VIS)and scanning electron microscopy(SEM).A three-electrode system was used to detect the photocurrent in the dark,and the LED with 390–410 nm was used as an excitation light source.The current–time(I–T)curve was recorded when the light source was switched.Results and Discussion The XRD patterns show that amorphous titanium dioxide modified anatase titanium dioxide electrode can be obtained.B

关 键 词：光子晶体 二氧化钛 非晶 光电性能 反蛋白石 

分 类 号：TB332[一般工业技术—材料科学与工程]