School of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China.
School of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China.
J Colloid Interface Sci. 2017 Jul 15;498:263-270. doi: 10.1016/j.jcis.2017.03.072. Epub 2017 Mar 18.
A novel hollow hierarchical nano-heterostructure consisting of ZnO nanorods coated with InO nanoparticles was prepared using a hydrothermal method combined with an annealing treatment via carbon fiber (CF) templates. Experimental results reveal that the InO/ZnO hierarchical composite has a tubular structure with an average diameter of ∼6μm and InO 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 (1ppm). This outstanding performance is a result of the one-dimensional tubular structure and the heterostructure formation between InO 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 InO nanoparticles on the ZnO nanorod surfaces, which provide more active sites for pollutants and gases.
采用水热法结合碳纤维（CF）模板的退火处理，制备了一种由 ZnO 纳米棒包覆 InO 纳米粒子的新型中空分级纳米异质结构。实验结果表明，InO/ZnO 分级复合材料具有平均直径约为 6μm 的管状结构，InO 纳米粒子均匀分布在 ZnO 纳米棒上。值得注意的是，所得到的异质结构在可见光照射下对甲基橙（MO）降解具有增强的光活性，并且对乙醇具有良好的选择性和响应性，即使在低检测限（1ppm）下也是如此。这种优异的性能是一维管状结构和 InO 与 ZnO 之间形成异质结构的结果，有利于吸附和扩散以及电子和空穴的分离。此外，由于 ZnO 纳米棒表面均匀装饰的 InO 纳米粒子，提供了更多用于污染物和气体的活性位点，从而大大提高了性能。
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