Tuning the electronic and structural properties of WO3 nanocrystals by varying transition metal tungstate precursors

doi:10.1039/c4ra10650d

CORC > 化学研究所 > 中国科学院化学研究所

	Tuning the electronic and structural properties of WO3 nanocrystals by varying transition metal tungstate precursors
	Rahimnejad, Sara 1,2,3; He, Jing Hui 1,2; Chen, Wei 1,4; Wu, Kai 2,5; Xu, Guo Qin 1,2
刊名	RSC ADVANCES
	2014
卷号	4 期号:107 页码:62423-62429
ISSN号	2046-2069
DOI	10.1039/c4ra10650d
英文摘要	Oxygen vacancy is one type of the most important defects affecting the photocatalytic performance of WO3. In this paper, WO3 nanoplates with a high density of oxygen vacancies were synthesized from MWO4 (M = Zn, Cd, Co, Ni) precursors using a sacrificial template method. The structures and morphologies of WO3 nanoplates were investigated by field emission scanning electron microscopy (FE-SEM), high resolution Transmission Electron Microscopy (HRTEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Brunauer-Emmett-Teller (BET) analysis, Photoluminescence (PL), Diffuse Reflectance UV-Vis (DRS UV-Vis) and Time-correlated single-photon counting (TCSPC). The metal tungstates were found to not only act as the precursors but also as structure-directing agents during the growth of WO3 nanoplates. XRD data revealed that two phases of WO3 center dot xH(2)O (x = 1 or 2) were obtained after acid treatment of MWO4. WO3 nanoplates derived from NiWO4 were found to have the highest ratio of WO3 center dot 2H(2)O, highest concentration of oxygen vacancies, narrowest band gap, longest electron-hole recombination time, and in turn the highest rate of photodegradation of azo dye methylene blue. These results show that the structural, electronic and photocatalytic properties of synthesized WO3 nanoplates can be tuned by varying the transition metal tungstate precursors.
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000345660300052
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/51695]
专题	中国科学院化学研究所
通讯作者	Xu, Guo Qin
作者单位	1.Natl Univ Singapore, Dept Chem, Singapore 117543, Singapore 2.SPURc, Singapore 138602, Singapore 3.Islamic Azad Univ, Yadegar & Imam Khomeini RAH Branch, Dept Chem, Tehran 18155144, Iran 4.Natl Univ Singapore, Dept Phys, Singapore 117542, Singapore 5.Peking Univ, Coll Chem & Mol Engn, State Key Lab Struct Chem Unstable & Stable Speci, Beijing 100871, Peoples R China
推荐引用方式 GB/T 7714	Rahimnejad, Sara,He, Jing Hui,Chen, Wei,et al. Tuning the electronic and structural properties of WO3 nanocrystals by varying transition metal tungstate precursors[J]. RSC ADVANCES,2014,4(107):62423-62429.
APA	Rahimnejad, Sara,He, Jing Hui,Chen, Wei,Wu, Kai,&Xu, Guo Qin.(2014).Tuning the electronic and structural properties of WO3 nanocrystals by varying transition metal tungstate precursors.RSC ADVANCES,4(107),62423-62429.
MLA	Rahimnejad, Sara,et al."Tuning the electronic and structural properties of WO3 nanocrystals by varying transition metal tungstate precursors".RSC ADVANCES 4.107(2014):62423-62429.