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

Chan Wai Soo; Chin Wei Lai; Guan-Ting Pan; Thomas Chung-Kuang Yang; Kian Mun Lee; Rahimi Muhammad Yusop; Joon Ching Juan

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

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Author(s): Chan Wai Soo¹ ; Chin Wei Lai¹ ; Guan-Ting Pan² ; Thomas Chung-Kuang Yang² ; Kian Mun Lee¹ ; Rahimi Muhammad Yusop³ ; Joon Ching Juan^{1, 4}
- Affiliations: 1: Nanotechnology and Catalysis Research Centre (NANOCAT), IPS Building , University of Malaya , Kuala Lumpur , Malaysia ;
  2: Department of Chemical Engineering , National Taipei University of Technology , Taipei City , Taiwan ;
  3: School of Chemical Sciences and Food Technology , Faculty of Science and Technology, National University of Malaysia , UKM, 43600 Bangi, Selangor Darul Ehsan , Malaysia ;
  4: School of Science , Monash University Malaysia Campus , School of Science, Bandar Sunway 46150 , Malaysia
Source: Volume 13, Issue 1, January 2018, p. 77 – 82
DOI: 10.1049/mnl.2017.0238 , Online ISSN 1750-0443

Received 04/05/2017, Accepted 14/08/2017, Revised 05/07/2017, Published 01/01/2018

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.

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

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