Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 624, Issue -, Pages 44-52Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2014.11.096
Keywords
ZnS-In2S3 solid solution; TiO2 nanofiber; Hierarchical architecture; Photocatalysis; Organic dye
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Funding
- Hunan Provincial Natural Science Foundation of China [14JJ1015]
- Program for Innovation Research Team in University [IRT1238]
- Hunan Provincial International Cooperation Project of China [2014WK3030]
- National Natural Science Foundation of China [51178173, 51238002, 51272099, 51378187]
- Program for New Century Excellent Talents in University [NCET-11-0126]
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A unique hierarchical architecture of ZnS-In2S3 solid solution nanostructures onto TiO2 nanofibers (TiO2@ZnS-In2S3) has been successfully fabricated by simple hydrothermal method. The ZnS-In2S3 solid solution nanostructures exhibit a diversity of morphologies: nanosheet, nanorod and nanoparticle. The porous TiO2 nanofiber templates effectively inhibit the aggregation growth of ZnS-In2S3 solid solution. The formation of ZnS-In2S3 solid solution is proved by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) and the intimate contact between TiO2 nanofibers and ZnS-In2S3 solid solution favors fast transfer of photogenerated electrons. The trinary TiO2@ZnS-In2S3 heterostructures exhibit high adsorption capacity and visible light photocatalytic activity for the degradation of rhodamine B dye (RhB), remarkably superior to pure TiO2 nanofibers or binary structures (ZnS/TiO2 nanofibers, In2S3/TiO2 nanofibers and ZnS-In2S3 solid solution). Under visible light irradiation the RhB photocatalytic degradation rate over TiO2@ZnS-In2S3 heterostructures is about 16.7, 12.5, 6.3, 5.9, and 2.2 times that over pure TiO2 nanofibers, ZnS nanoparticles, In2S3/TiO2 nanofibers, ZnS/TiO2 nanofibers, and ZnS-In2S3 solid solution, respectively. Furthermore, the TiO2@ZnS-In2S3 heterostructures show highly stable recycling performance. (C) 2014 Elsevier B. V. All rights reserved.
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