核壳结构CZTS-CdS纳米晶制备及其光催化产氢性能
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- 英文论文题名：Core-Shell Cu_2ZnSnS_4-CdS Nanocrystals for Photocatalytic Hydrogen Evolution
- 论文作者：王继磊 ; 陈小艳 ; 周文辉 ; 武四新
- 英文论文作者：Ji-Lei Wang ; Xiao-Yan Chen ; When-Hui Zhou ; Si-Xin Wu ; the Key Laboratory for Special Functional Materials of MOE ; Henan University
- 年：2016
- 作者机构：河南大学特种功能材料重点实验室;
- 论文关键词：Cu_2ZnSnS_4 ; CdS ; 核壳结构 ; p-n结 ; 光催化产氢
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第三十七分会：纳米催化
- 语种：中文
- 分类号：TB383.1;O643.36
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第三十七分会 ; 纳米催化
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：260k
- 原文格式：D
- 会议级别：全国
摘要
铜锌锡硫(Cu_2ZnSnS_4,CZTS)因具有与太阳光谱匹配的禁带宽度,较高的光吸收系数,良好的催化能力以及组成元素来源丰富、环境友好等优点而得了广泛的关注和研究,特别是CZTS作为光催化剂用于光催化产氢获得了极大的关注。由于CZTS材料自身的多元素组成及非化学计量比特性,导致其材料本身具有较多的有害缺陷,使得CZTS材料内部和表面光生载流子复合严重。针对这一问题,我们设计构建了核壳结构CZTS-CdS纳米晶,通过CZTS与CdS之间形成的p-n结可以提高光生载流子的分离效率并降低复合几率,有望实现CZTS基光催化剂催化制氢活性的调控与提高~([2])。
Cu_2ZnSnS_4(CZTS) has drawn much attention due to the optimum band gap, high absorption coefficient, photocatalytic ability, earth-abundant composition and environmentally friendly nature. CZTS also has received considerable attention in the field of photocatalytic hydrogen production. Due to the multielement and non-stoichiometry nature of CZTS, detrimental defects are always exists. These detrimental defects are responsible for most recombination of photogenerated carriers in bulk and surface of CZTS. In view of these above problems, core-shell Cu_2ZnSnS_4-CdS nanocrystals were constructed. The p-n heterojunction between CZTS(p type) and CdS(n type) interface facilitate the effective carrier separation and reduce carrier recombination, thus enhance the photocatalytic hydrogen evolution performance.
Cu_2ZnSnS_4(CZTS) has drawn much attention due to the optimum band gap, high absorption coefficient, photocatalytic ability, earth-abundant composition and environmentally friendly nature. CZTS also has received considerable attention in the field of photocatalytic hydrogen production. Due to the multielement and non-stoichiometry nature of CZTS, detrimental defects are always exists. These detrimental defects are responsible for most recombination of photogenerated carriers in bulk and surface of CZTS. In view of these above problems, core-shell Cu_2ZnSnS_4-CdS nanocrystals were constructed. The p-n heterojunction between CZTS(p type) and CdS(n type) interface facilitate the effective carrier separation and reduce carrier recombination, thus enhance the photocatalytic hydrogen evolution performance.
引文
[1]Chang,Z.X.;Zhou,W.H.;Kou,D.X.;Zhou,Z.J.;Wu S.X.Chem.Commun.2014,50(84):12726.
[2]Wang,H.L.;Zhang,L.S.;Chen,Z.G.;Hu,J.Q.;Li,S.J.;Wang.Z.H.;Liu J.S.;Wang,X.C.Chem.Soc.Rev.2014,43:5234.
[2]Wang,H.L.;Zhang,L.S.;Chen,Z.G.;Hu,J.Q.;Li,S.J.;Wang.Z.H.;Liu J.S.;Wang,X.C.Chem.Soc.Rev.2014,43:5234.