標題: | Facile fabrication of titania-ordered cubic mesoporous carbon composite: Effect of Ni doping on photocatalytic hydrogen generation |
作者: | Rath, Purna Chandra Mishra, Mrinalini Saikia, Diganta Chang, Jeng Kuei Perng, Tsong-Pyng Kao, Hsien-Ming 材料科學與工程學系 Department of Materials Science and Engineering |
關鍵字: | Titania;Ordered mesoporous carbon;Nickel;Photocatalytic H-2 generation;Photocatalyst |
公開日期: | 19-七月-2019 |
摘要: | Hitherto TiO2 is the most popular catalyst for photocatalytic H-2 generation and reduction of organic pollutants due to its chemical inertness, high activity, and abundance. In this work, ordered mesoporous carbon CMK-8 supported TiO2 nanoparticles loaded with non-noble metal Ni, denoted as Ni-TiO2@CMK-8 are fabricated for application in photocatalytic H-2 generation. Our results demonstrate that the developed composite exhibit exceptional photocatalytic activity for H-2 generation (3556 mu mol g(-1)) under 300 W Xe lamp irradiation (with an external quantum efficiency of 37.9%), which is around 10 times higher than pure TiO2 and 4 times that of TiO2@CMK-8. The enhanced photocatalytic performance is attributed to the well-dispersed TiO2 in the ordered mesoporous carbon structure of CMK-8. The performance is boosted by the black body-like light absorbance of CMK-8 and plasmonic effect of Ni. Enhanced UV-visible light absorbance, large surface area and the loaded Ni metal synergistically improve the charge-carrier kinetics to attain highly efficient photocatalytic H-2 generation. The Ni-TiO2@CMK-8 composite shows enhanced activity for the reduction of 4-nitrophenol as well. (C) 2018 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved. |
URI: | http://dx.doi.org/10.1016/j.ijhydene.2018.09.014 http://hdl.handle.net/11536/152674 |
ISSN: | 0360-3199 |
DOI: | 10.1016/j.ijhydene.2018.09.014 |
期刊: | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY |
Volume: | 44 |
Issue: | 35 |
起始頁: | 19255 |
結束頁: | 19266 |
顯示於類別: | 期刊論文 |