Photocatalytic hydrogen production from aqueous methanol solutions under visible light over Na(BixTa1−x)O3 solid-solution |
| |
| Authors: | Zhonghua Li Yanxin Wang Jiawen Liu Gang Chen Yingxuan Li Chao Zhou |
| |
| Affiliation: | 1. Department of Chemistry, School of Science, Harbin Institute of Technology, 92 Xidazhi Street, Harbin, 150001, P.R. China;2. College of Chemistry and Chemical Engineering, Harbin Normal University, Harbin 150025, China |
| |
| Abstract: | A series of equivalent substitution solid-solution Na(BixTa1−x)O3 (x = 0–0.10) was prepared by a simple hydrothermal method using Ta2O5 and NaBiO3 as precursors. The Na(Bi0.08Ta0.92)O3 photocatalyst exhibited the highest performance of H2 evolution (59.48 μmol h−1 g−1) under visible-light irradiation (λ > 400 nm) without co-catalyst, whereas no H2 evolution is observed for NaTaO3 under the same conditions. The UV-Vis spectra indicate that the Na(Bi0.08Ta0.92)O3 powders can absorb not only ultraviolet light like pure NaTaO3 powder but also the visible-light spectrum. The absorption edge corresponds to a band gap of 2.88 eV. The results of density functional theory calculation illuminate that the visible-light absorption bands in the Na(BixTa1−x)O3 catalysts are attributed to the band transition from the O2p to the Bi2s + 2p + Ta5d hybrid orbital. |
| |
| Keywords: | Visible light Hydrothermal synthesis Density functional calculations Hydrogen production Photocatalyst |
| 本文献已被 ScienceDirect 等数据库收录！ |
