原位合成可见光响应TiO<sub>2</sub>/SnS<sub>2</sub>及其光催化还原水中Cr(Ⅵ)的性质研究

李靖; 唐辉; 黄铭涛; 王晓辉; 段芳; 王绍荣

doi:10.13568/j.cnki.651094.2017.03.006

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原位合成可见光响应TiO₂/SnS₂及其光催化还原水中Cr(Ⅵ)的性质研究

更新时间：2026-01-21

- 原位合成可见光响应TiO₂/SnS₂及其光催化还原水中Cr(Ⅵ)的性质研究
- Journal of Xinjiang University (Natural Science Edition in Chinese and English) Vol. 34, Issue 3, Pages: 287-293(2017)
- 作者机构：
  
  1. 徐州工程学院化学化工学院
  2. 中国矿业大学化工学院
  3. 江南大学化学与材料工程学院
- 作者简介：
- 基金信息：
- DOI：10.13568/j.cnki.651094.2017.03.006
  CLC： O643.36;X703
- Published：2017
- 稿件说明：
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[1]李靖,唐辉,黄铭涛,等.原位合成可见光响应TiO_2/SnS_2及其光催化还原水中Cr(Ⅵ)的性质研究[J],2017,34(03):287-293.
[1]李靖,唐辉,黄铭涛,等.原位合成可见光响应TiO_2/SnS_2及其光催化还原水中Cr(Ⅵ)的性质研究[J],2017,34(03):287-293. DOI： 10.13568/j.cnki.651094.2017.03.006.

DOI：10.13568/j.cnki.651094.2017.03.006.

摘要

本文以钛酸四丁酯、四氯化锡和硫代乙酰胺为原料

在无水乙醇-水-冰醋酸的混合溶剂中得到可见光响应TiO2/SnS2纳米复合材料

采用XRD、TEM、HRTEM、XPS和UV-vis等测试手段表征了产品的结构、组成和光学性质;以可见光(λ>420 nm)为光源、K2Cr2O7水溶液为模型污染物

考察了所制产品和物理混合法所制的具有相同组成的PM-TiO2/SnS2的光催化活性.实验结果表明:得到了可见光响应的表面分散型TiO2/SnS2纳米复合材料具有比SnS2纳米片、TiO2纳米晶和PM-TiO2/SnS2纳米粉更高的可见光催化活性和良好的光催化稳定性;TiO2和SnS2具有匹配的能带结构

形成的表面分散型的异质结界面利于光生载流子有效分离和转移是ISTiO2/SnS2具有良好催化性能的重要因素.

Abstract

TiO2 nanocrystals-covered SnS2 nanoplates were synthesized via a simple and cost-effective insitu one-step solvothermal method

using Sn Cl4·5H_2O

thioacetamide and tetrabutyl titanate as the reactants and ethanol-water-acetic acid solution as the solvent. The compositions

structures and optical properties of the as-synthesized TiO2/SnS2 composites were characterized by X-ray diffraction

transmission electron microscopy

high resolution transmission electron microscopy

X-ray photoelectron spectroscopy and UV-vis diffuse reflectance spectra. It was observed that the as-synthesized TiO2/SnS_2nano-heterojunctions not only demonstrated much higher efficiency than SnS2 nanoplates

TiO2 nanocrystals and physical mixture of SnS2 nanoplates and TiO2 nanocrystals in photocatalytic reduction of aqueous Cr(VI) under visible light(λ > 420 nm) irradiation

but also had high photocatalytic stability. The greatly improved photocatalytic performance of the as-synthesized IS-TiO2/SnS_2nano-heterojunctions was mainly attributed to the efficient charge transfer and separation at the heterojunction interfaces between closely contacted SnS2 nanoplates and TiO2 nanocrystals

as well as the matching band potentials of SnS2 and TiO2.

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references

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原位合成可见光响应TiO2/SnS2及其光催化还原水中Cr(Ⅵ)的性质研究

DOI：10.13568/j.cnki.651094.2017.03.006

摘要

Abstract

关键词

Keywords

references

原位合成可见光响应TiO₂/SnS₂及其光催化还原水中Cr(Ⅵ)的性质研究