Effects of various hydrogenated temperatures on photocatalytic activity of mesoporous titanium dioxide

Micro & nano letters

article

Chan Wai Soo¹  Chin Wei Lai¹  Guan-Ting Pan²  Thomas Chung-Kuang Yang²  Kian Mun Lee¹  Rahimi Muhammad Yusop³  Joon Ching Juan¹ 

[1] Nanotechnology and Catalysis Research Centre (NANOCAT), University of Malaya;Department of Chemical Engineering, National Taipei University of Technology;School of Chemical Sciences and Food Technology, Faculty of Science and Technology, National University of Malaysia;School of Science, Monash University Malaysia Campus, School of Science

关键词: titanium compounds;    hydrogen;    mesoporous materials;    catalysis;    photodissociation;    dyes;    catalysts;    porous semiconductors;    mesoporous titanium dioxide;    hydrogenated titanium dioxide;    photocatalysis;    solar absorption;    structural properties;    photogenerated charges;    hydrogenation temperatures;    purified H2 gas;    reactive black 5 photodegradation;    photoactive rutile phase;    TiO2H;   

DOI  :  10.1049/mnl.2017.0238

学科分类：计算机科学（综合）

来源: Wiley

【 摘 要 】

Hydrogenated titanium dioxide (H-TiO2) has drawn much research attention in the photocatalysis society since it has significantly improved solar absorption and enhanced photocatalytic activity. Nevertheless, the key factor that leads to the enhanced photocatalytic performance of HTiO2 is still debatable. To clarify this issue, the structural properties of H-TiO2 and its effects on photogenerated charges are investigated. Mesoporous H-TiO2 was subjected to different hydrogenation temperatures rate under the flow of purified H2 gas and its photocatalytic activities are evaluated by reactive black 5 photodegradation. The H-TiO2 pretreated at different temperatures seems to have a detrimental effect on photocatalytic activity as compared with that of untreated H-TiO2. Further investigations reveal that H-TiO2 treated at high temperature can cause the formation of less photoactive rutile phase and agglomeration that leads to the inhibition of their photocatalytic activity.

【 授权许可】

CC BY|CC BY-ND|CC BY-NC|CC BY-NC-ND