CAS OpenIR  > 研究所(批量导入)
Dopant-Controlled Morphology Evolution of WO3 Polyhedra Synthesized by RF Thermal Plasma and Their Sensing Properties
Alternative TitleACS Appl. Mater. Interfaces
Yao, Mingshui1,2; Li, Qiaohong2; Hou, Guolin1,3; Lu, Chen1,3; Cheng, Benli1; Wu, Kechen2; Xu, Gang2; Yuan, Fangli1; Ding, Fei1; Chen, Yunfa1
2015-02-04
Source PublicationACS APPLIED MATERIALS & INTERFACES
ISSN1944-8244
Volume7Issue:4Pages:2856-2866
Abstract

In this paper, a simple way is developed for the synthesis of Cr-doped WO3 polyhedra controlled by tailoring intrinsic thermodynamic properties in RF thermal plasma. Scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy are used to characterize the detail structures and surface/near-surface chemical compositions of the as-prepared products. Kinetic factors showed little effects on the equilibrium morphology of Cr-doped WO3 polyhedra, while equilibrium morphologies of WO3 polyhedra can be controlled by the thermodynamic factor (Cr doping). Set crystal growth habits of pure WO3 as an initial condition, coeffects of distortions introduced by Cr into the WO3 matrix, and a chromate layer on the crystal surface could reduce the growth rates along [001], [010], and [100] directions. The morphology evolution was turning out as the following order with increasing Cr dopants: octahedrontruncated octahedroncuboid. 2.5 at. % Cr-doped WO3 polyhedra exhibit the highest sensing response due to coeffects of exposed crystal facets, activation energy, catalytic effects of Cr, and particle size on the surface reaction and electron transport units. By simply decorating Au on Cr-doped WO3 polyhedra, the sensing responses, detection limit, and responserecovery properties were significantly improved.

;

In this paper, a simple way is developed for the synthesis of Cr-doped WO3 polyhedra controlled by tailoring intrinsic thermodynamic properties in RF thermal plasma. Scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy are used to characterize the detail structures and surface/near-surface chemical compositions of the as-prepared products. Kinetic factors showed little effects on the equilibrium morphology of Cr-doped WO3 polyhedra, while equilibrium morphologies of WO3 polyhedra can be controlled by the thermodynamic factor (Cr doping). Set crystal growth habits of pure WO3 as an initial condition, coeffects of distortions introduced by Cr into the WO3 matrix, and a chromate layer on the crystal surface could reduce the growth rates along [001], [010], and [100] directions. The morphology evolution was turning out as the following order with increasing Cr dopants: octahedrontruncated octahedroncuboid. 2.5 at. % Cr-doped WO3 polyhedra exhibit the highest sensing response due to coeffects of exposed crystal facets, activation energy, catalytic effects of Cr, and particle size on the surface reaction and electron transport units. By simply decorating Au on Cr-doped WO3 polyhedra, the sensing responses, detection limit, and responserecovery properties were significantly improved.

KeywordWo3 Dopant Crystal Growth Habit Rf Thermal Plasma Mox Sensors
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1021/am5081277
URL查看原文
Indexed BySCI
Language英语
WOS KeywordPHOTOELECTROCHEMICAL WATER OXIDATION ; NANOSTRUCTURED TUNGSTEN-OXIDE ; GAS SENSORS ; VAPOR-DEPOSITION ; HOLLOW SPHERES ; THIN-FILMS ; SURFACE ; NANOPARTICLES ; SNO2 ; ZNO
WOS Research AreaScience & Technology - Other Topics ; Materials Science
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS IDWOS:000349137300085
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/11876
Collection研究所(批量导入)
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Fujian Inst Res Struct Matter, State Key Lab Struct Chem, Fuzhou 350002, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Yao, Mingshui,Li, Qiaohong,Hou, Guolin,et al. Dopant-Controlled Morphology Evolution of WO3 Polyhedra Synthesized by RF Thermal Plasma and Their Sensing Properties[J]. ACS APPLIED MATERIALS & INTERFACES,2015,7(4):2856-2866.
APA Yao, Mingshui.,Li, Qiaohong.,Hou, Guolin.,Lu, Chen.,Cheng, Benli.,...&Chen, Yunfa.(2015).Dopant-Controlled Morphology Evolution of WO3 Polyhedra Synthesized by RF Thermal Plasma and Their Sensing Properties.ACS APPLIED MATERIALS & INTERFACES,7(4),2856-2866.
MLA Yao, Mingshui,et al."Dopant-Controlled Morphology Evolution of WO3 Polyhedra Synthesized by RF Thermal Plasma and Their Sensing Properties".ACS APPLIED MATERIALS & INTERFACES 7.4(2015):2856-2866.
Files in This Item:
File Name/Size DocType Version Access License
Dopant-Controlled Mo(9168KB)期刊论文出版稿限制开放CC BY-NC-SAApplication Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Yao, Mingshui]'s Articles
[Li, Qiaohong]'s Articles
[Hou, Guolin]'s Articles
Baidu academic
Similar articles in Baidu academic
[Yao, Mingshui]'s Articles
[Li, Qiaohong]'s Articles
[Hou, Guolin]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Yao, Mingshui]'s Articles
[Li, Qiaohong]'s Articles
[Hou, Guolin]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.