Iodine doped anatase TiO(2) photocatalyst with ultra-long visible light response: correlation between geometric/electronic structures and mechanisms

IMR OpenIR

	Iodine doped anatase TiO(2) photocatalyst with ultra-long visible light response: correlation between geometric/electronic structures and mechanisms
	G. Liu; C. H. Sun; X. X. Yan; L. Cheng; Z. G. Chen; X. W. Wang; L. Z. Wang; S. C. Smith; G. Q. Lu; H. M. Cheng
	2009
发表期刊	Journal of Materials Chemistry
ISSN	0959-9428
卷号	19 期号:18 页码:2822-2829
摘要	We report that surface iodine doped TiO(2) with coexisting atomic configurations of iodine dopant, I-O-I and I-O-Ti structures, exhibits an extended absorption edge up to 800 nm. Furthermore, photocatalytic activity investigations confirm the efficient generation of important oxidative species (center dot)OH radicals in photocatalysis oxidation processes beyond 600 nm. It is theoretically found that iodine atoms prefer to be doped within the surface due to the strong I-O repulsion. I-doping in the surface led to little change in its intrinsic bandgap, but the distribution and occupation of localized states of iodine strongly depend on the surface iodine configurations. The latter is responsible for the wider range visible light response exhibited in anatase TiO2 with the coexistence of I-O-I and I-O-Ti structures. The coexistence of I-O-I and I-O-Ti structures can distinctly change the surface structure due to the release of local strain energies.
部门归属	[sun, chenghua; yan, xiaoxia; cheng, lina; smith, sean c.] univ queensland, australia inst bioengn & nanotechnol, ctr computat mol sci, brisbane, qld 4072, australia. [liu, gang; chen, zhigang; wang, xuewen; cheng, hui-ming] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. [liu, gang; sun, chenghua; wang, lianzhou; lu, gao qing (max)] univ queensland, sch engn, arc ctr excellence funct nanomat, brisbane, qld 4072, australia.;smith, sc (reprint author), univ queensland, australia inst bioengn & nanotechnol, ctr computat mol sci, brisbane, qld 4072, australia;s.smith@uq.edu.au maxlu@uq.edu.au cheng@imr.ac.cn
关键词	Titanium-dioxide Band-gap Thin-films Photoelectrochemical Properties Mechanochemical Reaction Electronic-structures Surface Science Mesoporous Tio2 Nitrogen Degradation
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/32080
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	G. Liu,C. H. Sun,X. X. Yan,et al. Iodine doped anatase TiO(2) photocatalyst with ultra-long visible light response: correlation between geometric/electronic structures and mechanisms[J]. Journal of Materials Chemistry,2009,19(18):2822-2829.
APA	G. Liu.,C. H. Sun.,X. X. Yan.,L. Cheng.,Z. G. Chen.,...&H. M. Cheng.(2009).Iodine doped anatase TiO(2) photocatalyst with ultra-long visible light response: correlation between geometric/electronic structures and mechanisms.Journal of Materials Chemistry,19(18),2822-2829.
MLA	G. Liu,et al."Iodine doped anatase TiO(2) photocatalyst with ultra-long visible light response: correlation between geometric/electronic structures and mechanisms".Journal of Materials Chemistry 19.18(2009):2822-2829.