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学科主题: 物理化学
题名: Effects of Zn2+ and Pb2+ dopants on the activity of Ga2O3-based photocatalysts for water splitting
作者: Wang, Xiang1;  Shen, Shuai1;  Jin, Shaoqing1;  Yang, Jingxiu1;  Li, Mingrun1;  Wang, Xiuli1;  Han, Hongxian1;  Li, Can1
通讯作者: 李灿
刊名: PHYSICAL CHEMISTRY CHEMICAL PHYSICS
发表日期: 2013
DOI: 10.1039/c3cp53333f
卷: 15, 期:44, 页:19380-19386
收录类别: SCI
合作性质: 
文章类型: Article
部门归属: 5
项目归属: 503
产权排名: 待补充
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical ;  Physics, Atomic, Molecular & Chemical
资助者: 1,1
研究领域[WOS]: Chemistry ;  Physics
英文摘要: Zn-doped and Pb-doped beta-Ga2O3-based photocatalysts were prepared by an impregnation method. The photocatalyst based on the Zn-doped beta-Ga2O3 shows a greatly enhanced activity in water splitting while the Pb-doped beta-Ga2O3 one shows a dramatic decrease in activity. The effects of Zn2+ and Pb2+ dopants on the activity of Ga2O3-based photocatalysts for water splitting were investigated by HRTEM, XPS and time-resolved IR spectroscopy. A ZnGa2O4-beta-Ga2O3 heterojunction is formed in the surface region of the Zn-doped beta-Ga2O3 and a slower decay of photogenerated electrons is observed. The ZnGa2O4-beta-Ga2O3 heterojunction exhibits type-II band alignment and facilitates charge separation, thus leading to an enhanced photocatalytic activity for water splitting. Unlike Zn2+ ions, Pb2+ ions are coordinated by oxygen atoms to form polyhedra as dopants, resulting in distorted surface structure and fast decay of photogenerated electrons of beta-Ga2O3. These results suggest that the Pb dopants act as charge recombination centers expediting the recombination of photogenerated electrons and holes, thus decreasing the photocatalytic activity.
关键词[WOS]: VISIBLE-LIGHT IRRADIATION ;  RESOLVED INFRARED-ABSORPTION ;  BOND-VALENCE DETERMINATION ;  PB(II) SORPTION PRODUCTS ;  SURFACE COMPLEXATION ;  HYDROGEN-PRODUCTION ;  O-2 EVOLUTION ;  NATAO3 PHOTOCATALYSTS ;  SRTIO3 PHOTOCATALYSTS ;  GA2O3 PHOTOCATALYST
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000326220000034
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/119573
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China

Recommended Citation:
Wang, Xiang,Shen, Shuai,Jin, Shaoqing,et al. Effects of Zn2+ and Pb2+ dopants on the activity of Ga2O3-based photocatalysts for water splitting[J]. PHYSICAL CHEMISTRY CHEMICAL PHYSICS,2013,15(44):19380-19386.
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