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	Hydrothermal synthesis of tungsten trioxides using citric acid as controlling agent
	Mo Ruo-Fei; Jin Guo-Qiang; Guo Xiang-Yun
刊名	Chinese journal of inorganic chemistry
	2007-09-01
卷号	23期号:9页码:1615-1620
关键词	Tungsten trioxide Rectangular flakes Citric acid Hydrothermal synthesis
ISSN号	1001-4861
通讯作者	Guo xiang-yun(xyguo@sxicc.ac.cn)
英文摘要	Nano-scaled orthorhombic tungsten trioxide rectangular flakes were synthesized by hydrothermal. method using citric acid as controlling agent. the phase composition of the products strongly depends on the reaction temperature. xrd results show that the product is tungsten trioxide monohydrate (wo3 - h2o) mixed with a small quantity of monoclime tungsten trioxide (gamma-wo3) at 393 k, gamma-wo3 at 413 k, and orthorhombic wo3 (beta-wo3) at 433 k and 453 k, respectively. sem images demonstrate that the products obtained at different reaction temperatures are all rectangular flakes with lamellar structure. all the products have almost the same specific surface areas between 8 similar to 9 m(2) center dot g(-1). the phase composition, morphology and specific surface area of the products can be controlled by the molar ratio of citric acid to tungstic acid (n(cit)/n(ta)). when n(cit)/n(ta)=o, the product is the mixture of h-wo3 (hexagonal system wo3) and wo3 center dot 1/3h(2)o, and have a morphology of nanorods; when n(cit)/n(ta)=0.5 or n(cit)/n(ta)= 1, the product is gamma- and have a morphology of rectangular flakes; when n(cit)/n(ta)=2, the product is beta-wo3, with the same morphology of rectangular flakes. in the ease of adding citric acid, the specific surface area of the products decreases with the increase of n(cit)/n(ta).
WOS关键词	THIN-FILMS ; WO3 ; MORPHOLOGY ; NANORODS ; ROUTE ; PHASE ; OXIDE
WOS研究方向	Chemistry
WOS类目	Chemistry, Inorganic & Nuclear
语种	英语
出版者	CHINESE CHEMICAL SOC
WOS记录号	WOS:000249881900021
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2381892
专题	中国科学院大学
通讯作者	Guo Xiang-Yun
作者单位	1.Chinese Acad Sci, State Key Lab Coal Convers, Taiyuan 030001, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
推荐引用方式 GB/T 7714	Mo Ruo-Fei,Jin Guo-Qiang,Guo Xiang-Yun. Hydrothermal synthesis of tungsten trioxides using citric acid as controlling agent[J]. Chinese journal of inorganic chemistry,2007,23(9):1615-1620.
APA	Mo Ruo-Fei,Jin Guo-Qiang,&Guo Xiang-Yun.(2007).Hydrothermal synthesis of tungsten trioxides using citric acid as controlling agent.Chinese journal of inorganic chemistry,23(9),1615-1620.
MLA	Mo Ruo-Fei,et al."Hydrothermal synthesis of tungsten trioxides using citric acid as controlling agent".Chinese journal of inorganic chemistry 23.9(2007):1615-1620.

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