Bi2Sn2O7的不同水热法制备及其可见光光催化除As(Ⅲ)性能分析

引用本文: 庄建东, 田勤奋, 刘平. Bi₂Sn₂O₇的不同水热法制备及其可见光光催化除As(Ⅲ)性能分析[J]. 物理化学学报, 2016, 32(2): 551-557. doi: 10.3866/PKU.WHXB201511304 shu

Citation: ZHUANG Jian-Dong, TIAN Qin-Fen, LIU Ping. Bi₂Sn₂O₇ Visible-Light Photocatalysts: Different Hydrothermal Preparation Methods and Their Photocatalytic Performance for As(Ⅲ) Removal[J]. Acta Physico-Chimica Sinica, 2016, 32(2): 551-557. doi: 10.3866/PKU.WHXB201511304 shu

Bi₂Sn₂O₇的不同水热法制备及其可见光光催化除As(Ⅲ)性能分析

庄建东 ^{1,
,} ,
田勤奋 ^1, ,
刘平 ^2,

1.
1 福建农林大学材料工程学院, 福州 350002;
2.
2 福州大学化学学院, 能源与环境光催化国家重点实验室, 福州 350002

通讯作者: 庄建东

基金项目:
国家自然科学基金(21303244) (21303244)

福建农林大学杰出青年基金(XJQ201419)资助项目 (XJQ201419)

摘要: 利用微波和普通水热法合成出了具有可见光响应的Bi₂Sn₂O₇纳米光催化剂,并用X射线衍射(XRD)、氮气吸脱附、紫外-可见漫反射光谱(UV-Vis DRS)、扫描电镜(SEM)、透射电镜(TEM)、电子顺磁共振谱(ESR)、X射线光电子能谱(XPS)等技术对样品的晶相、比表面积、光吸收性能、形貌、光催化活性物种等结构与性质进行了系统表征,比较微波水热Bi₂Sn₂O₇(MH-BSO)与普通水热Bi₂Sn₂O₇(TH-BSO)形貌和微结构,并考察两者在可见光光照下光催化氧化As(Ⅲ)的性能差别。实验结果表明,MH-BSO具有更细小的粒径和更大的比表面积,而在可见光照射下,MH-BSO样品比TH-BSO样品具有更好的As(Ⅲ)的光催化氧化能力(可达98.7%)。此外,对Bi₂Sn₂O₇纳米光催化剂氧化去除As(Ⅲ)的光催化机理进行初步探索,结果表明超氧自由基(O₂^-·)和空穴(hVB+)是主要起作用的中间反应活性物种。

关键词:

English

Bi₂Sn₂O₇ Visible-Light Photocatalysts: Different Hydrothermal Preparation Methods and Their Photocatalytic Performance for As(Ⅲ) Removal

1.
1 College of Materials Engineering, Fujian Agriculture and Forestry University, Fuzhou 350002, P. R. China;
2.
2 State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350002, P. R. China

Corresponding author: 庄建东

Received Date: 06 October 2015
Fund Project:
国家自然科学基金(21303244)

福建农林大学杰出青年基金(XJQ201419)资助项目

Abstract: Bi₂Sn₂O₇, synthesized through different hydrothermal routes (the microwave hydrothermal method (MH-BSO) and the traditional hydrothermal method (TH-BSO)), was used for photocatalytic removal of arsenic from aqueous solution. The as-synthesized Bi₂Sn₂O₇ products were characterized by X-ray diffraction (XRD), N2 sorption-desorption, UV-Vis diffuse reflectance spectroscopy (UV-Vis DRS), transmission electron microscopy (TEM), electron spin resonance (ESR), X-ray photoelectron spectra (XPS), and electrochemistry technology. Under visible light irradiation, the MH-BSO sample exhibited a higher photocatalytic activity (up to 98.7%) than that of the TH-BSO sample during the oxidization of arsenite (AsO₃)^3-. The active species, O₂^-· and h_VB⁺, were identified as the primary active species responsible for As(Ⅲ) oxidation. In addition, a possible mechanism for the photo-oxidation of As(Ⅲ) over Bi₂Sn₂O₇ is proposed.

Key words:

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沈阳化工大学材料科学与工程学院沈阳 110142

Bi₂Sn₂O₇的不同水热法制备及其可见光光催化除As(Ⅲ)性能分析

通讯作者: 庄建东

English

Bi₂Sn₂O₇ Visible-Light Photocatalysts: Different Hydrothermal Preparation Methods and Their Photocatalytic Performance for As(Ⅲ) Removal

Corresponding author: 庄建东

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