期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 699, 期 -, 页码 183-192出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2016.12.343
关键词
TiO2-Based nanosheets; Hydrogen evolution; Textile industrial wastewater; 0D-2D Schottky barrier heterostructures
资金
- National Basic Research Program of China (973 Program) [2009CB939704, 2009CB939705]
- Large-scale Instrument and Equipment Sharing Foundation of Wuhan University [LF20150681, 20150683]
- National Natural Science Foundation of China [51402126, 11547262]
TiO2-nanosheet (TNS) was firstly fabricated using a one-pot hydrothermal route followed with photo depositing various dosages of Pt nanoparticles over its surface. The hydrogen production performance of these as-prepared samples was assessed in triehanolamine (TEOA) aqueous solutions under visible-light irradiation. The results showed the optimal ratio of Pt:, TNS was 0.5 wt %, with apparent quantum efficiency (QE) climbing 15.44%. And on this basis, it was used to H-2 production simultaneous photo degradation with individual or both kinds of dyes (namely, methyl orange (MO), eosine Y (EY), methyl blue (MB) and rhedamine B (RhB)), respectively. As the figures indicated, although the rate of hydrogen production saw a steady increase in the single dye in the solution, it was outmatched by any two kinds of dyes group, which played significant positive synergism effects. In particular, when MB/EY group was added intoTEOA solution, the QE reached a peaking of 25.42% dramatically. In addition, real textile industrial wastewater was applied in this system, and the QE was 20.45%, which was 1.32 fold that of clean water. The crucial factor in improving the photocatalytic activity was that appropriate amount of functional 0D-2D Schottky barrier heterostructures were constructed. Such a novel architecture provided a large and intimate contact interface for fast interfacial photo-charges separation. The effective charge transfer from TNS to Pt was demonstrated by the significant enhancement of photocurrent responses in 0D-2D Pt-TNS composite. This work created new opportunities for designing and constructing highly efficient photocatalysts by interfacial engineering. (C) 2016 Elsevier B.V. All rights reserved.
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