In situ preparation of oxygen-deficient TiO2 microspheres with modified {001} facets for enhanced photocatalytic activity | |
Department | ERC国家工程研究中心 |
Liu XG(刘小刚)1,2; Bi YP(毕迎普)1; Bi YP(毕迎普) | |
The second department | osso国家重点实验室 |
2017 | |
Source Publication | RSC Advances |
ISSN | 2046-2069 |
Volume | 7Issue:16Pages:9902-9907 |
Abstract | A facile in situ synthetic strategy has been developed to prepare highly active oxygen-deficient anatase TiO2 microsphere single crystals with modified {001} facets by simply controlling the hydrothermal reaction time. More importantly, on investigating the performance of photocatalytic hydrogen evolution, TiO2 microspheres consisting of micro-decahedrons with etched {001} facets show superior photoreactivity compared with TiO2 microspheres wrapped with intact-{001} faceted anatase crystals. As determined by electron spin resonance (ESR) measurement, short hydrothermal reaction time facilitates the formation of oxygen vacancies, whereas longer hydrothermal reaction time contributes to the decrease of oxygen vacancies and formation of subsurface Ti3+ defect states. Based on the PL emission spectra obtained at different excited wavelengths, a possible mechanism of charge separation and transport resulting from changing of bulk/surface trapping sites on the building blocks of TiO2 microspheres is proposed, and the enhanced photocatalytic efficiency of the as-prepared TiO2 microsphere is largely attributed to the efficient separation and transport of photogenerated charge carriers caused by rational surface modulation and modification. |
Subject Area | 物理化学与绿色催化 |
DOI | 10.1039/c6ra28533c |
Funding Organization | the "Hundred Talents Program" of the Chinese Academy of Sciences; the National Natural Science Foundation of China (21622310;21573264;21603247) |
Indexed By | SCI |
If | 3.108 |
Language | 英语 |
Funding Project | 能源与环境纳米催化材料组 |
compositor | 第一作者单位 |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.licp.cn/handle/362003/21438 |
Collection | 精细石油化工中间体国家工程研究中心(ERC) 羰基合成与选择氧化国家重点实验室(OSSO) |
Corresponding Author | Bi YP(毕迎普) |
Affiliation | 1.State Key Laboratory for Oxo Synthesis & Selective Oxidation, National Engineering Research Center for Fine Petrochemical Intermediates, Lanzhou Institute of Chemical Physics, CAS, Lanzhou 730000, China 2.University of Chinese Academy of Sciences, Beijing 100049, China |
Recommended Citation GB/T 7714 | Liu XG,Bi YP,Bi YP. In situ preparation of oxygen-deficient TiO2 microspheres with modified {001} facets for enhanced photocatalytic activity[J]. RSC Advances,2017,7(16):9902-9907. |
APA | Liu XG,Bi YP,&毕迎普.(2017).In situ preparation of oxygen-deficient TiO2 microspheres with modified {001} facets for enhanced photocatalytic activity.RSC Advances,7(16),9902-9907. |
MLA | Liu XG,et al."In situ preparation of oxygen-deficient TiO2 microspheres with modified {001} facets for enhanced photocatalytic activity".RSC Advances 7.16(2017):9902-9907. |
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c6ra28533c.pdf(719KB) | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | View Application Full Text |
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