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Flame aerosol synthesis of WO3/CeO2 from aqueous solution: Two distinct pathways and structure design
Wang, Shuhao1,2; Huang, Yun1
2016-10-02
Source PublicationCHEMICAL ENGINEERING SCIENCE
ISSN0009-2509
Volume152Issue:OCTPages:436-442
Abstract

Flame aerosol synthesis is a continuous one-step method to obtain metal oxides. However, production of uniform particle is considered an inherent challenge for flame aerosol synthesis from aqueous solution. It is necessary to fully understand the synthesis route and the essential governing factors to break through the barrier. A series of flames with different temperatures were employed to synthesize WO3, CeO2 and the WO3/CeO2 composite powders. Flame temperature and precursor concentration were investigated to determine the synthesis pathways from aqueous droplet to particle. Size distribution of the powders indicated that they were homogeneous (unimodal) micron particles at low temperature flame process, nanopowders at high temperature, and inhomogeneous (bimodal) particles in between. Two distinct pathways (droplet-particle and droplet-vapor-particle) were generalized from experiments and verified by size statistics. It was the competition between the temperature of flame and the vapor pressure of precursor solute that played an important role on selection of pathways. Based on the different response to temperature, the nanosized WO3/CeO2 mixture and nanoparticle-decorated WO3@CeO2 were designed. Furthermore, this generalized method was applicable for other tungsten oxide nanostructured catalysts, e.g. WO3@Al2O3, WO3@ZrO2. (C) 2016 Elsevier Ltd. All rights reserved.

KeywordFlame Aerosol Synthesis Distinct Pathways Structure Design Tungsten Oxide Aqueous Solution
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.ces.2016.06.045
Indexed BySCI
Language英语
WOS KeywordVISIBLE-LIGHT IRRADIATION ; SPRAY-PYROLYSIS ; THERMAL-DECOMPOSITION ; OXIDE NANOPARTICLES ; PHOTOCATALYSTS ; SPECTROSCOPY ; PARTICLES ; CATALYSTS ; DROPLETS ; ZNO
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
Funding OrganizationNational Natural Science Foundation of China(91434116) ; China 973 Research Program(2015CB251303)
WOS IDWOS:000381542300039
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/21456
Collection多相复杂系统国家重点实验室
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab MultiPhase Complex Syst, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Wang, Shuhao,Huang, Yun. Flame aerosol synthesis of WO3/CeO2 from aqueous solution: Two distinct pathways and structure design[J]. CHEMICAL ENGINEERING SCIENCE,2016,152(OCT):436-442.
APA Wang, Shuhao,&Huang, Yun.(2016).Flame aerosol synthesis of WO3/CeO2 from aqueous solution: Two distinct pathways and structure design.CHEMICAL ENGINEERING SCIENCE,152(OCT),436-442.
MLA Wang, Shuhao,et al."Flame aerosol synthesis of WO3/CeO2 from aqueous solution: Two distinct pathways and structure design".CHEMICAL ENGINEERING SCIENCE 152.OCT(2016):436-442.
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