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题名: Modified cellulose adsorption method for the synthesis of conducting perovskite powders for membrane application
作者: Shao, ZP;  Li, GT;  Xiong, GX;  Yang, WS
关键词: perovskite ;  cellulose ;  synthesis ;  surface area ;  sinter
刊名: POWDER TECHNOLOGY
发表日期: 2002-01-04
卷: 122, 期:1, 页:26-33
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Technology
类目[WOS]: Engineering, Chemical
研究领域[WOS]: Engineering
英文摘要: A modified cellulose adsorption method, i.e., pyrolysis of cellulose-(organic acid)-salt solid composite was applied for the synthesis of conducting perovskite-type La1-xSrxBO3-delta (B = Co, Fe, Mn; x = 0.0, 0.1, 0.2) functional oxides. Citric acid is mainly selected as the organic acid. Infrared (IR), scanning electron microscopy-electron diffusion spectroscopy (SEM-EDS) and X-ray diffraction (XRD) results indicated that the citric acid modified cellulose adsorption method could preserve the homogeneity of the solution system to the solid precursor more efficiently than the unmodified one, due to the change of interaction between metal salts and organic substance from weak chemical adsorption to chemical chelation and fixation. Thermal gravimetry and differential thermal analysis (TG-DTA) and IR results demonstrated that the citric acid's addition also changed the pyrolysis behavior of the precursor, Perovskite oxides could be obtained at low temperatures (less than or equal to600 degreesC) without development of other phases; the as-prepared powders had the morphology of cellulose fiber and relatively high Brunauer-Emmet-Teller (BET) surface areas (8-30 m(2)/g). The resulted oxide powders also demonstrated excellent sinterability, it is suitable for fabrication of dense membranes. (C) 2002 Elsevier Science B.V. All rights reserved.
关键词[WOS]: OXYGEN PERMEATION ;  LA1-XSRXFEO3-DELTA MEMBRANES ;  NITROGEN MONOXIDE ;  CERAMIC MEMBRANE ;  OXIDES ;  TRANSPORT ;  LA0.3SR0.7COO3-DELTA ;  DECOMPOSITION ;  SEPARATION ;  GRADIENTS
语种: 英语
WOS记录号: WOS:000173174100004
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/139189
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Shao, ZP,Li, GT,Xiong, GX,et al. Modified cellulose adsorption method for the synthesis of conducting perovskite powders for membrane application[J]. POWDER TECHNOLOGY,2002,122(1):26-33.
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