Fabrication of TiO2 nanofiber assembly from nanosheets（TiO2-NFs-NSs） by electrospinning-hydrothermal method for improved photoreactivity

作     者：Yachao Lu Xiaoyu Ou Wenguang Wang Jiajie Fan Kangle Lv 陆亚超;欧小雨;王文广;范佳杰;吕康乐

作者机构：Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of EducationCollege of Resources and Environmental ScienceSouth-Central University for NationalitiesWuhan 430074HubeiChina School of Materials and EnergyGuangdong University of TechnologyGuangzhou 510006GuangdongChina School of Materials Science and EngineeringZhengzhou UniversityZhengzhou 450001HenanChina 

基　　金：supported by the National Natural Science Foundation of China(51672312,21373275) the Fundamental Research Funds for the Central Universities,South-Central University for Nationalities(CZT19006) 

出 版 物：《Chinese Journal of Catalysis》 (催化学报（英文）)

年 卷 期：2020年第41卷第1期

页      码：209-218页

摘      要：Hierarchically structured nanomaterials have attracted much attention owing to their unique *** this study,TiO2 nanofibers assembled from nanosheets(TiO2-NFs-NSs)were fabricated through electrospinning technique,which was followed by hydrothermal treatment in NaOH *** effect of hydrothermal reaction time(0-3 h)on the structure and properties of TiO2 nanofibers(TiO2-NFs)was systematically studied,and TiO2-NFs was evaluated in terms of the photocatalytic activity toward photocatalytic oxidation of acetone and the photoelectric conversion efficiency of dye-sensitized solar *** was found that(1)hydrothermal treatment of TiO2-NFs in NaOH solution followed by acid washing and calcination results in the formation of TiO2-NFs-NSs;(2)upon extending the hydrothermal reaction time from 0 h to 3 h,the BET surface area of TiO2-NFs-NSs(T3.0 sample)increases 3.8 times(from 28 to 106 m2 g^-1),while the pore volume increases 6.0 times(from 0.09 to 0.54 cm3 g^-1);(3)when compared with those of pristine TiO2-NFs(T0 sample),the photoreactivity of the optimized TiO2-NFs-NSs toward acetone oxidation increases 3.1 times and the photoelectric conversion efficiency increases 2.3 *** enhanced photoreactivity of TiO2-NFs-NSs is attributed to the enlarged BET surface area and increased pore volume,which facilitate the adsorption of substrate and penetration of gas,and the unique hollow structure of TiO2-NFs-NSs,which facilitates light harvesting through multiple optical reflections between the TiO2 nanosheets.

主 题 词：TiO2 nanofiber Electrospinning Photocatalytic oxidation Acetone Dye-sensitized solar cell 

学科分类：08[工学] 0805[工学-能源动力学] 080502[080502] 

核心收录：

D　O　I：10.1016/S1872-2067(19)63470-4

馆 藏 号：203796066...