期刊
ELECTROCHIMICA ACTA
卷 277, 期 -, 页码 244-254出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2018.05.014
关键词
Black TiO2 nanotubes; Au nanoparticles; PbS quantum dots; Fast charge separation
资金
- KD program at University College of Southeast Norway
- Norwegian Research Council-FRINATEK programme [231416/F20]
- EEA-Poland [237761]
- National Natural Science Foundation of China [61574117, 61274120]
- Norwegian Ph.D. Network on Nanotechnology for Microsystems - Research Council of Norway, Division for Science [221860/F40]
Reduced TiO2 nanomaterials (so-called black TiO2) attract intensive research interests due to their excellent capability for harvesting solar energy. To obtain a high conversion rate of solar energy to electrical energy, we loaded Au nanoparticles (NPs) and PbS quantum dots (QDs) on as-prepared TiO2 nanotubes (TNT) and black TiO2 nanotubes by magnetron sputter technique and subsequently dip coating for enhancing their photoelectric behaviors. It was discovered that the loadings of Au NPs and PbS QDs result in over 45% enhancement of photocurrent for the black TNT under visible light, and only similar to 9.12% enhancement on the as-prepared TNT (without reduction process). The loadings of Au NPs and PbS QDs might act as separation centers rather than only light absorbers to accelerate electron-hole separation and transport. The black TiO2 nanotube composites could be considered as an excellent photoelectrode material applied in the field of solar energy conversion due to their high visible light harvesting and photoelectric response. (C) 2018 Elsevier Ltd. All rights reserved.
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