ɑ-Fe_2O_3多孔纳米棒结构及其光电催化性能
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- 英文论文题名：Photoanode Hematite Photoelectrocatalysis for Water Splitting
- 论文作者：王开放 ; 高旭升 ; 贺冬莹 ; 刘光 ; 李晋平
- 英文论文作者：Kai-fang Wang ; Xu-sheng Gao ; Dong-ying He ; Guang Liu ; Jin-ping Li ; Research Institute of Special Chemicals ; Tai Yuan University of Technology
- 年：2016
- 作者机构：太原理工大学精细化工研究所;
- 论文关键词：ɑ-Fe2O3 ; 多孔纳米棒 ; 光电催化
- 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-第二十七分会：光化学
- 语种：中文
- 分类号：O614.811;O643.36
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第二十七分会 ; 光化学
- 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：245k
- 原文格式：D
- 会议级别：全国
摘要
在光电化学池中,ɑ-Fe_2O_3是一种非常具有发展前景的光阳极催化剂,它廉价易得,稳定性好,具有高的光电转化效率,而微观形貌是影响其光电催化性能的重要原因之一。为此,我们用二氰胺聚合物的水溶液,通过溶剂热法合成了一种多孔的纳米棒状结构前驱体,直径在40~80nm之间,长度为300nm左右。氮气中800℃下烧结10分钟可以获得ɑ-Fe2O3,在模拟一倍的太阳光下(100m W/cm2),外加偏压为1.23V(vs.RHE)时,光电流密度可以达到0.93m A/cm~2,表现出了较强的光响应,这可能是由于多孔的结构增加了与电解液的接触面积,加速了电荷的转移。通过EDS分析发现,纳米棒中含有少量的碳、氮元素,而且FTO表面的锡元素在高温下也会扩散至纳米棒中,造成元素掺杂。
Hematite is considered as one of the most promising photoanode catalyst in photoelectrochemical cell, it has the advantages of high solar to hydrogen efficiency in theory, chemical stability under illumination and abundance in earth, and nanostructure is one of the important reasons for photoelectrocatalysis property. Here, the multihole nanorods are prepared by solvothermal method, its diameter is between 40 and 80 nanometer, the length at about 300 nanometer. In AM1.5G, the photocurrent density can reach 0.93 m A/ cm~2 at1.23V(vs. RHE), this high photoresponse due to the increased area at the interface between catalyst and electrolyte, and the result may accelerate charge transfer.
Hematite is considered as one of the most promising photoanode catalyst in photoelectrochemical cell, it has the advantages of high solar to hydrogen efficiency in theory, chemical stability under illumination and abundance in earth, and nanostructure is one of the important reasons for photoelectrocatalysis property. Here, the multihole nanorods are prepared by solvothermal method, its diameter is between 40 and 80 nanometer, the length at about 300 nanometer. In AM1.5G, the photocurrent density can reach 0.93 m A/ cm~2 at1.23V(vs. RHE), this high photoresponse due to the increased area at the interface between catalyst and electrolyte, and the result may accelerate charge transfer.
引文
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[3]Carvalho-Jr,W.M.;Souza,F.L.Sol.Energ.Mat.Sol.C.,2016,144:395-404.
[4]Li,M.;Zhang,Z.;Lyu,F.;He,X.;Liang,Z.;Balogun,M-S.;Lu,X.;Fang,P-P.;Tong,Y.Electrochim.Acta,2015,186:95-100.