Towards TiO2 nanotubes modified by WO3 species: influence of ex situ crystallization of precursor on the photocatalytic activities of WO3/TiO2 composites

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	Towards TiO2 nanotubes modified by WO3 species: influence of ex situ crystallization of precursor on the photocatalytic activities of WO3/TiO2 composites
	Sun, Hui 1; Dong, Bohua 1; Su, Ge 1; Gao, Rongjie 1; Liu, Wei 1; Song, Liang 2; Cao, Lixin 1
刊名	JOURNAL OF PHYSICS D-APPLIED PHYSICS
	2015-09-09
卷号	48 期号:35
关键词	WO3/TiO2 nanotubes photocatalytic activity hydrothermal ammonium paratungstate
英文摘要	TiO2 nanotubes (TNT) crystallized at different temperatures were loaded with WO3 hydrate through the reaction between (NH4)(6)W7O24 center dot 6H(2)O and an aqueous solution of HCl. The photocatalytic activities of nanocomposites firstly increase and then decrease as a function of the crystallized temperature of the TNT precursor. The structural, morphologic and optical properties of WO3/TiO2 nanocomposites were also investigated in this study. The samples, initially anatase titania (573 K-773 K), presented phase transition to rutile titania at 873 K. With the crystallized temperature increasing, an evolution of samples morphology changing from nanotube-like structure to nanorod-like structure was observed. Meanwhile, the absorption edge of samples exhibited a red shift, and correspondingly their band gap decreased. Consistent with x-ray diffraction diffractograms, the existence of rutile titania as an impurity in the precursor TNT, crystallized at higher than 873 K, depressed photocatalytic activity evidently. As a result, the degradation rate of methyl orange (MO) increased with the samples crystallinity firstly, and then reduced due to the appearance of rutile titania. In our experimental conditions, the optimal photocatalytic activity was achieved for the sample crystalized at 773 K. Its degradation rate could reach 98.76% after 90 min UV light irradiation.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Physics, Applied
研究领域[WOS]	Physics
关键词[WOS]	QUANTITATIVE-ANALYSIS ; FORMATION MECHANISM ; METHYL-ORANGE ; DEGRADATION ; ARRAYS ; ANATASE ; CELL
收录类别	SCI
语种	英语
WOS记录号	WOS:000359714700018
公开日期	2015-12-24
内容类型	期刊论文
源URL	[http://ir.qibebt.ac.cn/handle/337004/6508]
专题	青岛生物能源与过程研究所_科技发展部
作者单位	1.Ocean Univ China, Inst Mat Sci & Engn, Qingdao 266100, Peoples R China 2.Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Key Lab Biofuels, Qingdao 266101, Peoples R China
推荐引用方式 GB/T 7714	Sun, Hui,Dong, Bohua,Su, Ge,et al. Towards TiO2 nanotubes modified by WO3 species: influence of ex situ crystallization of precursor on the photocatalytic activities of WO3/TiO2 composites[J]. JOURNAL OF PHYSICS D-APPLIED PHYSICS,2015,48(35).
APA	Sun, Hui.,Dong, Bohua.,Su, Ge.,Gao, Rongjie.,Liu, Wei.,...&Cao, Lixin.(2015).Towards TiO2 nanotubes modified by WO3 species: influence of ex situ crystallization of precursor on the photocatalytic activities of WO3/TiO2 composites.JOURNAL OF PHYSICS D-APPLIED PHYSICS,48(35).
MLA	Sun, Hui,et al."Towards TiO2 nanotubes modified by WO3 species: influence of ex situ crystallization of precursor on the photocatalytic activities of WO3/TiO2 composites".JOURNAL OF PHYSICS D-APPLIED PHYSICS 48.35(2015).