Sn掺杂对氧空位型α-Fe2O3纳米颗粒光解水性能的影响

在退火前未抽真空条件下,采用滴涂法在常压氮气氛围中退火制备了含氧空位的α-Fe2O3纳米颗粒.通过在空气和氮气氛围中退火和向前驱体溶液直接加入SnCl4制备的α-Fe2O3的方法研究了Sn掺杂对氧空位型的α-Fe2O3纳米颗粒光催化性能的影响.结果表明,氮气氛围中退火Sn掺杂得到的的α-Fe2O3在1.23V vs.RHE时的电流密度分别是氮气氛围中退火未掺杂的α-Fe2O3的35倍和空气氛围中退火Sn掺杂的α-Fe2O3的15倍,氮气氛围中退火和掺杂被证明是获得高催化性能必不可少的条件.Mott-Schottky曲线和交流阻抗谱表明,掺杂和氧空位能增大催化剂的载流子浓度的电导率.在牺牲剂溶液...

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Published in电化学 Vol. 23; no. 1; pp. 21 - 27
Main Author 王祖华 钮东方 李辉成 杜荣斌 徐衡 张新胜
Format Journal Article
LanguageChinese
Published 28.02.2017
Subjects
Sn掺杂
α-Fe2O3
氧空位
表面反应速率
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Abstract 在退火前未抽真空条件下,采用滴涂法在常压氮气氛围中退火制备了含氧空位的α-Fe2O3纳米颗粒.通过在空气和氮气氛围中退火和向前驱体溶液直接加入SnCl4制备的α-Fe2O3的方法研究了Sn掺杂对氧空位型的α-Fe2O3纳米颗粒光催化性能的影响.结果表明,氮气氛围中退火Sn掺杂得到的的α-Fe2O3在1.23V vs.RHE时的电流密度分别是氮气氛围中退火未掺杂的α-Fe2O3的35倍和空气氛围中退火Sn掺杂的α-Fe2O3的15倍,氮气氛围中退火和掺杂被证明是获得高催化性能必不可少的条件.Mott-Schottky曲线和交流阻抗谱表明,掺杂和氧空位能增大催化剂的载流子浓度的电导率.在牺牲剂溶液中测试发现,Sn掺杂导致材料的表面反应速率提高是催化剂活性的重要影响因素.
AbstractList 在退火前未抽真空条件下,采用滴涂法在常压氮气氛围中退火制备了含氧空位的α-Fe2O3纳米颗粒.通过在空气和氮气氛围中退火和向前驱体溶液直接加入SnCl4制备的α-Fe2O3的方法研究了Sn掺杂对氧空位型的α-Fe2O3纳米颗粒光催化性能的影响.结果表明,氮气氛围中退火Sn掺杂得到的的α-Fe2O3在1.23V vs.RHE时的电流密度分别是氮气氛围中退火未掺杂的α-Fe2O3的35倍和空气氛围中退火Sn掺杂的α-Fe2O3的15倍,氮气氛围中退火和掺杂被证明是获得高催化性能必不可少的条件.Mott-Schottky曲线和交流阻抗谱表明,掺杂和氧空位能增大催化剂的载流子浓度的电导率.在牺牲剂溶液中测试发现,Sn掺杂导致材料的表面反应速率提高是催化剂活性的重要影响因素.
Author 王祖华 钮东方 李辉成 杜荣斌 徐衡 张新胜
AuthorAffiliation 华东理工大学化学工程联合国家重点实验室,上海200237 石油化工新材料协同创新中心,安徽安庆246011
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DocumentTitleAlternate Sn-Doped α-Fe2O3 Photocatalyst Containing Oxygen Vacancy for Water-Splitting
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Notes WANG Zu-hua1, NIU Dong-fang1, LI Hui-cheng1, DU Rong-bin2, XU Heng2, ZHANG Xin-sheng1 （1. State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237; 2. Collaborative Innovation Center for Petrochemical New Materials, A nqing 246011, A nhui）
α-Fe2O3 photocatalyst; oxygen vacancy; Sn doping; surface reaction rate
The α-Fe2O3 nanoparticles containing oxygen vacancies were synthesized in atmospheric N2 by dip-dropping method without a high vacuum employed before annealing.The influences of annealing atmosphere and Sn-doping on the photocatalytic performance of α-Fe2O3 nanoparticles were studied by annealing the photocatalyst in N2 or air and adding SnCl4 to the precursor directly.The results showed that the current density of Sn-doping α-Fe2O3 annealed in N2 at 550oC and 1.23 V（vs.RHE） was 35 times greater than that of pristine α-Fe2O3 annealed in N2 at 550 ℃ and 15 times greater than that of Sn-doping α-Fe2O3 annealed in air at 550 oC,which indicated that both S
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PublicationTitle 电化学
PublicationTitleAlternate Electrochemistry
PublicationYear 2017
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Snippet 在退火前未抽真空条件下,采用滴涂法在常压氮气氛围中退火制备了含氧空位的α-Fe2O3纳米颗粒.通过在空气和氮气氛围中退火和向前驱体溶液直接加入SnCl4制备的α-Fe2O3的方法研究了Sn掺杂对氧空位型的α-Fe2O3纳米颗粒光催化性能的影响.结果表明,氮气氛围中退火Sn掺杂得到的的α-Fe2O3在1.23V...
SourceID chongqing
SourceType Publisher
StartPage 21
SubjectTerms Sn掺杂
α-Fe2O3
氧空位
表面反应速率
Title Sn掺杂对氧空位型α-Fe2O3纳米颗粒光解水性能的影响
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