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求助结束！两个化学反应具体步骤
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本人非化学专业出身，请教高手们以下化学反应的具体步骤 1、怎样把MoF6转化为CaMoO4？ 2、怎样把GeF4转化为CaGeO3？ [ Last edited by dongjing0136 on 2007-12-26 at 13:10 ] |
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hobbyzhang
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dongjing0136(金币+5,VIP+0):辛苦了！谢谢您的应助
dongjing0136(金币+5,VIP+0):辛苦了！谢谢您的应助
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Preparation of CaMoO4 thin film by potentiostatic anode oxidation method and characterization. Bi, Jian; Zhang, Shu; Lai, Xin; Cui, Chun-Hua; Shi, Fang; Gao, Dao-Jiang. College of Chemistry & Materials Science, Sichuan Normal University, Chengdu, Peop. Rep. China. Yingyong Huaxue (2007), 24(5), 494-498. Publisher: Kexue Chubanshe, CODEN: YIHUED ISSN: 1000-0518. Journal written in Chinese. AN 2007:677598 CAPLUS Abstract In satd. Ca(OH)2 solns., CaMoO4 thin films with scheelite structure were prepd. by potentiostatic anode oxidn. method. The influence of soln. acidity and the method of substrate pretreatment on the film growth as well as the change of current during the deposition were studied, and the crystal phase structure, surface morphol., chem. compns. as well as photoluminescence at room temp. were investigated by XRD, SEM, XPS and FA (fluorescence anal.), resp. The results revealed that the grain growth was more complete for the CaMoO4 films deposited on polished substrate, and the grain size was larger and the photoluminescence at room temp. better than that of CaMoO4 films deposited on the substrate etched by mixt. acids. When the soln. pH exceeded 12.30, cluster growth of the grains was obsd. Therefore, it is better to prep. CaMoO4 films by potentiostatic anode oxidn. method on polished substrate, and to control the soln. pH at about 12.00. Influence of current density and pre-treatment of substrate on preparation of CaMoO4 thin films by electrochemical technique. Bi, Jian; Yu, Ping; Gao, Daojiang; Chen, Lianping; Yang, Zunian; Xiao, Dingquan. School of Materials Science and Engineering, Sichuan University, Chengdu, Peop. Rep. China. Gongneng Cailiao (2006), 37(12), 1951-1954. Publisher: Gongneng Cailiao Bianjibu, CODEN: GOCAEA ISSN: 1001-9731. Journal written in Chinese. AN 2007:620685 CAPLUS Abstract The influence of c.d. and pre-treatment of substrates on the formation of CaMoO4 thin films prepd. by electrochem. technique under const. c.d. conditions was studied. The results reveal that when the c.d. of anode oxidn. is enlarged, the growth speed of CaMoO4 thin films will be accelerated; whereas the cluster growing trend of CaMoO4 grains will be aggravated, and the adhesive force and uniformity of as-prepd. thin films would be weakened. The different pre-treatment ways of the substrates have great impact on the growth speed of grains, depositing ways as well as the uniformity of the as-prepd. CaMoO4. Furthermore, the depositing speed of CaMoO4 thin films on the substrate mech. polished is much faster than that on substrates roughly grinded or polished by using the mixt. acids, and the deposition of CaMoO4 thin films on the substrate mech. polished will hardly leads to the growth of cluster grains. The results indicate that the optimized electrochem. deposit condition for CaMoO4 films is the c.d. about 0.5mA/cm2 deposited on the substrates polished mech. Effects of solution acidity and reaction temperature on electrochemical preparation of CaMoO4 thin films. Bi, Jian; Yu, Ping; Gao, Dao-Jiang; Chen, Lian-Ping; Yang, Zhu-Nian; Xiao, Ding-Quan. College of Materials Science and Engineering, Sichuan University, Chengdu, Peop. Rep. China. Wuji Huaxue Xuebao (2006), 22(11), 1996-2000. Publisher: Wuji Huaxue Xuebao Bianjibu, CODEN: WHUXEO ISSN: 1001-4861. Journal written in Chinese. CAN 147:346402 AN 2006:1289016 CAPLUS Abstract The effects of soln. acidity and reaction temp. on the formation of CaMoO4 thin films were studied under const. c.d. process. The soln. acidity could affect the growth time and photoluminescence of as-prepd. CaMoO4 thin films, and low soln. acidity could cause the formation of clusters and the appearance of uncertain phases. When the reaction temp. was raised appropriately, the growth of CaMoO4 grain would be accelerated, the purity of as-prepd. CaMoO4 thin films be improved and the relative intensity of emission spectra of as-prepd. films be increased. The optimized pH value and reaction temp. were found to be 12.0 and 60 癈, resp., for the prepn. of well crystd. and high purity CaMoO4 polycryst. thin films. |
4楼2007-12-26 11:49:32
2楼2007-12-26 10:03:01
hobbyzhang
荣誉版主 (文坛精英)
小木虫首席大法官
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Cryst. Growth Des., 7 (12), 2397–2399 10.1021/cg060611o Web Release Date: November 3, 2007 Copyright © 2007 American Chemical Society Preparation of Monodispersed Eu3+:CaMoO4 Nanocrystals with Single Quasihexagon Sheng Yu,†‡ Zhoubin Lin,† Lizhen Zhang,† and Guofu Wang*† Fujian Institute of Research on the Structure of Matter, State Key Laboratory of Structural Chemistry, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China, and Graduate School of the Chinese Academy of Sciences, Beijing 100039, China Received September 13, 2006 Revised September 12, 2007 Abstract: This paper reports the preparation of Eu3+:CaMoO4 nanocrystals by the microemulsion-mediated hydrothermal method. The synthesized Eu3+:CaMoO4 nanocrystals were characterized by XRD, transmission electron microscopy, high-resolution transmission electron microscopy, excitation, and emission spectra. The result shown that Eu3+:CaMoO4 nanocrystals with sizes of 40–90 nm exhibited a monodispersed and single quasihexagon. Eu3+:CaMoO4 nanocrystals exhibit a strong red fluorescence at 614 nm. This result may bring opportunity for the development of the other nanocrystals. |
3楼2007-12-26 11:47:56