期刊
JOURNAL OF ENERGY CHEMISTRY
卷 25, 期 4, 页码 726-733出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jechem.2016.04.009
关键词
Ti3+ self-doping; Titanium; Photoanode; Water splitting; Photoelectrocatalytic properties
资金
- Key Project of Natural Science Foundation of Shandong Province [ZR2013EMZ001]
- National Basic Research Program of China [2013C6632401]
- National Nature Science Foundation of China [51,402.145]
- National University Student Innovation Program [201,510,532,033]
To improve the harvesting of visible light and reduce the recombination of photogenerated electrons and holes, Ti3+ self-doped TiO2 nanoparticles were synthesized and assembled into photoanodes with high visible light photoelectrochemical properties. X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectra, electron resonance spectroscopy and energy dispersive X-ray spectra were used to characterize the structure, crystallinity, morphology and other properties of the obtained nanoparticles. UV-visible diffuse reflectance spectra showed that the Ti3+ self-doped TiO2 nanoparticles had a strong absorption between 400 and 800 nm. Moreover, when hydrothermal treatment time was prolonged to 22 h, the heterogeneous junction was formed between the anatase and rutile TiO2, where the anatase particles exposed highly active {001} facets. Under visible light irradiation, the Ti3+ self-doped TiO2 electrode exhibited an excellent photoelectrocatalytic degradation of rhodamine B (RhB) and water splitting performance. Intriguingly, by selecting an appropriate hydrothermal time, the high photoconversion efficiency of 1.16% was achieved. (C) 2016 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. and Science Press. All rights reserved.
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