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Synthesis of flower-likebasic zinc carbonatethrough a ceramic membrane dispersion reactor

Authors： XU Zhilong，ZHANG Feng，ZHONG Zhaoxiang，XING Weihong*

Units： National Engineering Research Center for Special Separation Membrane, Membrane Science and Technology Research Center, Nanjing University of Technology, Nanjing 210009, Jiangsu, China

KeyWords： membrane reactor；nanomaterials；basic zinc carbonate

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2015,35(2):7-13

Abstract：

A direct sediment reaction was coupled with a ceramic membrane to construct a membrane reactor, for synthesis of basic zinc carbonate. Flower-like basic zinccarbonatewith nanostructures were successfully prepared at room temperaturerapidly. The effects of membrane pore size, flux and sediment reaction conditions such as stirring rate, molar ratio and initial concentration on particle size and morphology were studied.The products were characterized by SEM, XRD, BET and so on. The results showed that the particle size of basic zinc carbonatedecreased with the decrease of membrane pore size and flux. Under different molar ratio(MNH4HCO3/MZn(CH3COO)2)，bulk, strip and sphere powders could be obtained. Plate, dumbbell-like and flower-like basic zinc carbonate with uniform size and morphology were prepared respectively when theconcentration of zinc acetate increased from 0.25 to 1.0mol/L. Flower-like basic zinc carbonate hierarchically structures are assembled by nanosheets of 20 nm and the diameter of the powders is about 3 μm. The specific surface area of prepared basic zinc carbonatecanreachto 61.62m2/g.

Funds：

国家自然科学基金项目(21125629,21306079, 21276124），863重大项目课题(2012AA03A606),江苏省高校自然科学基金(13KJB530005) ，江苏省工业支撑项目（BE2011185）

AuthorIntro：

许志龙，(1989-)，男，硕士研究生，研究方向为膜分离技术；邢卫红（联系人），研究员，

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