Synthesis of Mg_5(CO_3)_4(OH)_2·4H_2O with Flower-like Micro-structure and Its Catalytic Activity for Transesterification of Dimethyl Carbonate with Phenol  

作　　者：WANG Qiang WANG Ke-li WU Xing-long LUO Sheng-jun HU Chang-wen 

机构地区：[1]The Institute for Chemical Physics, Department of Chemistry, State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, P. R. China [2]Biological Engineering Department, Jilin Vocational Technology College in Agriculture Engineering, C, ongzhuling 136100, P. R. China

出　　处：《Chemical Research in Chinese Universities》2007年第6期641-645,共5页高等学校化学研究（英文版）

基　　金：Supported by the National Natural Science Foundation of China(Nos.20671011,20331010,90406002and90406024);the 111 Project(No.B07012);the Key Laboratory of Structural Chemistry Foundation(No.060017).

摘　　要：A novel flower-like hydrated magnesium carbonate hydroxide, Mg5 （CO3 ）4 （OH）2·4H2O, with micro-structure composed of individual thin nano-sheets was synthesized using a facile solution route without the use of template or organic surfactant. Reaction time has an important effect on the final morphology of the product. The micro-structure and morphology of Mg5 （CO3）4 （OH）2·4H2O were characterized by means of X-ray diffractometry （XRD）, fieldemission scanning electron microscopy（FE-SEM）. Brunauer-Emmett-Teller（BET） surface areas of the samples were also measured. The probable formation mechanism of flower-like micro-structure was discussed. It was found that Mg5 （CO3）4（ OH）2·4H2O with flower-like micro-structure was a novel and efficient catalyst for the synthesis of diphenyl carbonate （DPC） by transesterification of dimethyl carbonate （DMC） with phenol.A novel flower-like hydrated magnesium carbonate hydroxide, Mg5 （CO3 ）4 （OH）2·4H2O, with micro-structure composed of individual thin nano-sheets was synthesized using a facile solution route without the use of template or organic surfactant. Reaction time has an important effect on the final morphology of the product. The micro-structure and morphology of Mg5 （CO3）4 （OH）2·4H2O were characterized by means of X-ray diffractometry （XRD）, fieldemission scanning electron microscopy（FE-SEM）. Brunauer-Emmett-Teller（BET） surface areas of the samples were also measured. The probable formation mechanism of flower-like micro-structure was discussed. It was found that Mg5 （CO3）4（ OH）2·4H2O with flower-like micro-structure was a novel and efficient catalyst for the synthesis of diphenyl carbonate （DPC） by transesterification of dimethyl carbonate （DMC） with phenol.

关 键 词：Mg5（CO3）4（OH）2 ·4H2O Flower-like micro-structure Catalytic property TRANSESTERIFICATION Diphenyl carbonate 

分 类 号：O614.22[理学—无机化学]