Effects of various hydrogenated temperatures on photocatalytic activity of mesoporous titanium dioxide. (1st January 2018)

• Record Type: Journal Article
• Authors: Soo, Chan Wai; Lai, Chin Wei; Pan, Guan‐Ting; Yang, Thomas Chung‐Kuang; Lee, Kian Mun; Yusop, Rahimi Muhammad; Juan, Joon Ching
• Is Part Of: Micro & nano letters. Volume 13:Number 1(2018)
• Page Start: 77
• Page End: 82
• Publication Date: 2018-01-01
• Subjects: 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 -- TiO2:H; Nanotechnology -- Periodicals; Nanostructures -- Periodicals; Microtechnology -- Periodicals; 620.5
• DOI: 10.1049/mnl.2017.0238
• Languages: English
• ISSNs: 1750-0443

Abstract

Abstract : 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 H‐TiO2 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.