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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
发表期刊CHEMICAL ENGINEERING SCIENCE
ISSN0009-2509
卷号152期号:OCT页码:436-442
摘要

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.

关键词Flame Aerosol Synthesis Distinct Pathways Structure Design Tungsten Oxide Aqueous Solution
文章类型Article
WOS标题词Science & Technology ; Technology
DOI10.1016/j.ces.2016.06.045
收录类别SCI
语种英语
关键词[WOS]VISIBLE-LIGHT IRRADIATION ; SPRAY-PYROLYSIS ; THERMAL-DECOMPOSITION ; OXIDE NANOPARTICLES ; PHOTOCATALYSTS ; SPECTROSCOPY ; PARTICLES ; CATALYSTS ; DROPLETS ; ZNO
WOS研究方向Engineering
WOS类目Engineering, Chemical
项目资助者National Natural Science Foundation of China(91434116) ; China 973 Research Program(2015CB251303)
WOS记录号WOS:000381542300039
引用统计
被引频次:1[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ipe.ac.cn/handle/122111/21456
专题多相复杂系统国家重点实验室
作者单位1.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
推荐引用方式
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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