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Cellulose吸附法制备氧化物粉体的机理研究 邵宗平1,杨维慎1,熊国兴1 (1.中国科学院大连化学物理研究所催化基础研究国家重点实验室,大连,116023) 摘要:应用TG,DTA,IR,XRD和CO2-TPD等技术对用cellulose吸附法合成La0.8Sr0.2CoO3(LSCO)粉体的过程机理进行了研究. 发现在制备过程中cellulose首先起着一种金属离子吸附剂的作用. 在焙烧的前期阶段,cellulose先被部分氧化而在其骨架上出现了羧酸基团,并与金属离子发生螯合形成螯合离子. 优化条件下,在低温合成了纯相LSCO粉体. 然而若焙烧过程中产生的CO2不能及时地排出,会导致体相中碳酸盐的形成,从而需要高于800C的再焙烧才能获得纯相的LSCO粉体. 关键词:cellulose; 合成; La0.8Sr0.2CoO3; 机理研究; [全文内容正在添加中] ......
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Influence of Cellulose Ethers on Hydration Products of Portland Cement马保国,欧志华Key Laboratory for Silicate Materials Science and Engineering of Ministry of Education,Wuhan University of Technology摘 要:Cellulose ethers are widely used to mortar formulations,and it is significant to understand the interaction between cellulose ethers and cement pastes.FT-IR......
Separation of silver from silver-manganese ore with cellulose as reductant ZHANG Xiao-yun(张小云), TIAN Xue-da(田学达), ZHANG Dong-fang(张东方) College of Chemical Engineering, Xiangtan University... concentrate of both magnetic separation and flotation was dissolved in a reducing leaching, in which some cellulose reductant named CMK was used. Part of the slime contained in leach residue was removed......
Biosorption of Methylene Blue by Chemically Modifi ed Cellulose Waste靳艳巧,ZHANG Yizhuan,Lü Qiufeng,CHENG XiansuCollege of Materials Science and Engineering, Fuzhou University摘 要:Citric acid modifi ed cellulose waste(CMCW) was prepared via esterifi cation and used as a low-cost biosorbent for the removal of methylene blue(MB) from aqueous solutions......
Analysis of Air Voids Evolution in Cement Pastes Admixed with Non-ionic Cellulose Ethers欧志华1,2,XIAO Yi1,王菁菁1,MA Baoguo2,JIANG Longmin1,JIAN Shouwei21. School of Civil Engineering, Hunan University of Technology2. State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology摘 要:Four cellulose ethers(CEs) were compared......
Evaluation of Several Procedures for Immobilizing Cholesterol Oxidase Based on Cellulose Acetate Membrane王琛琪摘 要:Immobilized cholesterol oxidase ( COD) membrane with higher catalytic activity is important for biosensor.In this paper, several procedures for immobilizing COD based on cellulose acetate (CA) membrane are studied. Reasons causing different......
CHEMICAL PROPERTIES OF AMINO-CARBOXYLMETHYL CELLULOSE AND ITS DEPRESSING MECHANISMS ON STIBNITE徐晓军,胡熙庚,刘金华摘 要:<正>This paper presents a study on the chemical properties ofamino-carboxylmethyl cellulose(ACMC)and the mechanisms of the reac-tion of ACMC with copper ions and the depression of ACMC on CuSO4-ac-tivated stibnite.The results of XPS and IR......
EFFECT OF METAL IONIC SPECIES AT MINERAL SURFACES ON THE ADSORPTION OF CARBOXYMETHYL CELLULOSE曾宪滨,邓小莉,刘奇摘 要:<正>In this research it was shown that mineral surface metal-lic sites played a decisive role in carborymethyl cellulose(CMC) adsorp-tion, and surface hydrophobicity alone did not have significant effects.Both the carboxymethyl groups......
Kinetics of reductive leaching of manganese oxide ore using cellulose as reductantWU Fang-fang(武芳芳)1, 2, ZHONG Hong(钟宏)1, 2, WANG Shuai(王帅)1, 2, LAI Su-feng(赖素凤)1, 2(1. College of Chemistry..., China)Abstract:The kinetics of reductive leaching of manganese from a low-grade manganese oxide ore were studied using cellulose as reductant in dilute sulfuric acid medium. It was found that when......
