Effects of Zn2+ and Pb2+ dopants on the activity of Ga2O3-based photocatalysts for water splitting

	Effects of Zn2+ and Pb2+ dopants on the activity of Ga2O3-based photocatalysts for water splitting
	Wang, Xiang; Shen, Shuai; Jin, Shaoqing; Yang, Jingxiu; Li, Mingrun; Wang, Xiuli; Han, Hongxian; Li, Can
刊名	physical chemistry chemical physics
	2013
卷号	15 期号:44 页码:19380-19386
通讯作者	李灿
产权排序	待补充
合作状况	英
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.
学科主题	物理化学
WOS标题词	science & technology ; physical sciences
类目[WOS]	chemistry, physical ; physics, atomic, molecular & chemical
研究领域[WOS]	chemistry ; physics
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
收录类别	SCI
资助信息	1，1
原文出处	19386
语种	英语
WOS记录号	WOS:000326220000034
公开日期	2014-09-11
内容类型	期刊论文
源URL	[http://159.226.238.44/handle/321008/119573]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
作者单位	Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China
推荐引用方式 GB/T 7714	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.
APA	Wang, Xiang.,Shen, Shuai.,Jin, Shaoqing.,Yang, Jingxiu.,Li, Mingrun.,...&Li, Can.(2013).Effects of Zn2+ and Pb2+ dopants on the activity of Ga2O3-based photocatalysts for water splitting.physical chemistry chemical physics,15(44),19380-19386.
MLA	Wang, Xiang,et al."Effects of Zn2+ and Pb2+ dopants on the activity of Ga2O3-based photocatalysts for water splitting".physical chemistry chemical physics 15.44(2013):19380-19386.