Ag-doped TiO2 photocatalysts with effective charge transfer for highly efficient hydrogen production through water splitting |
| |
| Affiliation: | 1. Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India;2. CSIR - North East Institute of Science and Technology, Jorhat, 785006, Assam, India;1. Materials Technology and Process Engineering Laboratory, University of Bejaia, Algeria;2. Department of Physics, College of Science, University of Bahrain, PO Box 32038, Kingdom of Bahrain;3. Solid Physics Laboratory, Department of Physics, Faculty of Science, University Badji Mokhtar, Annaba, Algeria;4. Department of Material Sciences, Faculty of Science and Technology, Ahmed Draia University – ADRAR, Algeria;1. Microelectronics and Nanotechnology-Shamsuddin Research Center, Institute for Integrated Engineering, Universiti Tun Hussein Onn Malaysia, 86400, Parit Raja, Batu Pahat, Johor, Malaysia;2. Faculty of Engineering Technology, Universiti Tun Hussein Onn Malaysia, Hab Pendidikan Tinggi Pagoh, Km 1, Jalan Panchor, 84600 Muar, Johor, Malaysia;3. Faculty of Applied Science and Technology, Universiti Tun Hussein Onn Malaysia, Pagoh Education Hub, 84600 Muar, Johor, Malaysia;4. NANO-ElecTronic Centre (NET), Faculty of Electrical Engineering, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia;5. Nanotechnology Research Centre, Faculty of Science and Mathematics, Universiti Pendidikan Sultan Idris, 35900 Tanjung Malim, Perak, Malaysia;6. Department of Engineering, Graduate School of Integrated Science and Technology, Shizuoka University, 432-8011 Hamamatsu, Shizuoka, Japan;1. Department of Chemistry, Siddaganga Institute of Technology (Affiliated to Visvesvaraya Technological University, Belagavi), Tumakuru, 572103, India;2. Department of Chemical Technology, Faculty of Sciences, Chulalongkorn University, 10330, Thailand;3. School of Basic Sciences, Jain University, Bangalore 562 112, Karnataka, India;4. The School of Chemical and Biomolecular Engineering, The University of Sydney, Sydney, NSW 2006, Australia;1. School of Chemical Engineering, Northwest University, No. 229 Taibai North Road, Xi’an, Shaanxi 710069, China;2. Department of Physics, Northwest University, Xi''an, Shaanxi, China;3. School of Science, Xi''an Polytechnic University, No. 19 Jinhua South Road, Xi''an, Shaanxi, China |
| |
| Abstract: | The development of efficient metal doped semiconductors for solar energy harvesting to produce hydrogen has attracted significant attention. Herein, the H2 generation over Ag-doped TiO2 photocatalyst, synthesized using a simple and cost-effective method based on chemical reduction, was reported. The Ag/TiO2 exhibited an absorption peak in the visible region and the reduction of the bandgap to 2.5 eV due to surface plasmonic resonance (SPR). X-ray photoelectron spectroscopy revealed the presence of oxygen vacancies and 11% of Ag in Ti–Ag–O phase. The effect of reaction time and photocatalyst loading in the absence and presence of sacrificial reagents (alcohols and sulfur) on water splitting was studied and compared the activity of Ag/TiO2 with that of bare TiO2. The H2 production rate of 23.5 mmol g−1 h−1 (with an apparent quantum yield of 19%), over 1.5Ag/TiO2, was the highest ever reported so far. The observed higher activity could mainly be attributed to the existence of oxygen vacancies and the Ti–Ag–O phase. The photocatalyst was stable for three consecutive cycles in both the presence and absence of sacrificial reagents. This study offers new insights into the rational design of metal-support hybrid structures for hydrogen production through photocatalytic water splitting. |
| |
| Keywords: | Photocatalytic water splitting Renewable energy Bandgap reduction Hydrogen production |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
