Abstract

A visible light active nanocrystalline trirutile antimonates CoSb₂O₆, CuSb₂O₆, NiSb₂O₆ and FeSb₂O₆ were prepared by solution combustion method and their visible light photocatalytic activity was reported for the first-time. The as prepared products were in nanocrystalline single phasic trirutile structure. These compounds were synthesized with different oxidant to fuel ratios (O/F = 1, O/F = 0.5 and O/F = 2). XRD confirmed the formation of trirutile structured single phase and Raman spectral modes showed characteristic features of trirutile structure with broadening peaks. UV-DRS confirmed the band-gap decreases with different Oxidant/Fuel ratios. Furthermore, all the products showed good activity in p-nitrophenol degradation while CuSb₂O₆ showed better activity (98%) than the other products after 3 h. Thus, the presented work is highly extensive to those of UV active antimonate photocatalysts reported in the literature and this work unlocks the way to develop visible light active antimonate based semiconductor photocatalysts for degradation of organic pollutants in wastewater

摘要

可见光活性纳米晶三金红石锑酸盐 CoSb ₂ O ₆、CuSb ₂ O ₆、NiSb ₂ O ₆和 FeSb ₂ O ₆采用溶液燃烧法制备，首次报道了其可见光光催化活性。所制备的产物为纳米晶单相三金红石结构。这些化合物是用不同的氧化剂与燃料比（O/F = 1、O/F = 0.5 和 O/F = 2）合成的。XRD 证实形成了三金红石结构的单相，拉曼光谱模式显示出具有加宽峰的三金红石结构的特征。UV-DRS 证实了带隙随着不同氧化剂/燃料比的降低。此外，所有产物均表现出良好的对硝基苯酚降解活性，而CuSb ₂ O ₆3 小时后显示出比其他产品更好的活性 (98%)。因此，所提出的工作对文献中报道的紫外活性锑酸盐光催化剂的研究非常广泛，这项工作为开发基于可见光活性锑酸盐的半导体光催化剂用于降解废水中的有机污染物开辟了道路