个人信息
教师姓名：张永才
教师拼音名称：ZYC
电子邮箱：
入职时间：2003-06-01
所在单位：化学化工学院
职务：professor
学历：博士研究生毕业
办公地点：N111, New Chemistry Building, Yangzhou University, No.180 Siwangting Road, Yangzhou City
联系方式：zhangyc@yzu.edu.cn
学位：博士
职称：副高级
在职信息：在岗
硕士生导师
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所属院系： 化学化工学院
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学科：无机化学
其他联系方式
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论文成果
A new high efficiency visible-light photocatalyst made of SnS2 and conjugated derivative of polyvinyl alcohol and its application to Cr(VI) reduction
发布时间：2021-06-08 点击次数：
DOI码：10.1016/j.cej.2017.05.009
所属单位：扬州大学
教研室：无机教研室
发表刊物：Chemical Engineering Journal
项目来源：江苏省自然科学基金
关键字：Tin disulfide; Polyvinyl alcohol; Nanocomposites; Photocatalytic Cr(VI) reduction
摘要：This study focuses on the synthesis of a new high efficiency visible-light photocatalyst made of SnS2 and conjugated derivative (CPVA) from thermal dehydration of polyvinyl alcohol (PVA), and the evaluation of its performance in photocatalytic reduction of aqueous Cr(VI). SnS2/CPVA nanocomposites were synthesized via the procedures of (i) mixing of SnS2 nanocrystals and PVA in aqueous solution and evaporation of the aqueous solvent to generate SnS2/PVA nanocomposites, and (ii) thermal treatment of the SnS2/PVA nanocomposites for transforming their PVA into conjugated CPVA. The optimum conditions for synthesis of most efficient SnS2/CPVA nanocomposite were explored. The characterization by X-ray diffraction, Raman spectroscopy, infrared spectroscopy, X-ray photoelectron spectroscopy, high resolution transmission electron microscopy and elemental mapping indicated the formation of SnS2/CPVA nanocomposites. The photocatalytic experiments showed that SnS2/CPVA nanocomposite synthesized under the optimum conditions (SnS2/CPVA-1%-180 °C-2 h) had exceptionally higher photocatalytic activity than SnS2 nanocrystals, physical mixture of SnS2 nanocrystals and CPVA, SnS2/CPVC nanocomposite and TiO2/CPVA nanocomposite in the reduction of aqueous Cr(VI) under visible-light (wavelength > 420 nm) irradiation. The mechanism underlying the most enhanced photocatalytic activity of SnS2/CPVA-1%-180 °C-2 h was elucidated, based upon comparison between the optical, photoelectric and electrochemical impedance properties of SnS2 nanocrystals and different SnS2/CPVA nanocomposites. Furthermore, the effects of photocatalytic experiment parameters (including dosage of photocatalyst, and initial pH and concentration of Cr(VI) aqueous solution) on the Cr(VI) removal efficiency by SnS2/CPVA-1%-180 °C-2 h were also studied.
论文类型：journalArticle
论文编号：https://doi.org/10.1016/j.cej.2017.05.009
文献类型：journalArticle
卷号：324
页面范围：140-153
是否译文：否
发表时间：2017-09-15
收录刊物：SCI
