Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 498, Issue -, Pages 263-270Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2017.03.072
Keywords
Hollow nanotubes; In2O3 nanoparticles; ZnO nanorods; Photoactivity; Gas-sensing
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Funding
- National High Technology Research and Development Program of China (863 Program) [2015AA034404]
- Distinguished Taishan Scholars in Climbing Plan [tspd20161006]
- Science and Technology Development Planning of Shandong Province [2014GGX102026]
- Natural Science Foundation of Shandong Province [ZR2015EQ001, ZR2015EQ007]
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A novel hollow hierarchical nano-heterostructure consisting of ZnO nanorods coated with In2O3 nanoparticles was prepared using a hydrothermal method combined with an annealing treatment via carbon fiber (CF) templates. Experimental results reveal that the In2O3/ZnO hierarchical composite has a tubular structure with an average diameter of similar to 6 mu m and In2O3 nanoparticles distribute uniformly on the ZnO nanorods. Significantly, the obtained heterostructure shows enhanced visible light photoactivity to methyl orange (MO) degradation and good selectivity and response toward ethanol even at a low detection limit (1 ppm). This outstanding performance is a result of the one-dimensional tubular structure and the heterostructure formation between In2O3 and ZnO, advantageous for the adsorption and diffusion and the separation of electrons and holes. In addition, the excellent performance is greatly improved by virtue of the evenly decorated In2O3 nanoparticles on the ZnO nanorod surfaces, which provide more active sites for pollutants and gases. (C) 2017 Elsevier Inc. All rights reserved.
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