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《Material Science and Technology》 2002-03
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A study on the synthesis of ZnO nanoparticles by supercritical fluid drying

ZHANG jing-chang,GAO Wei,CAO Wei-Hang,HU Zhi-hao (Faculty of Science, Beijing University of Chemical Technology, Beijing 100029, China)  
ZnO nanoparticles have many special characters. They were prepared by liquid chemistry and supercritical fluid drying (SCFD) from cheap inorganic salts as raw materials. It was found that the particle size depends on pH value, Zn2+ concentration, aging time and SCFD conditions. It was found that the increase of Zn2+ concentration will lead to larger size of particles. If pH 8 - 9, adding pH value will result in smaller particles; if pH = 8 - 9, particles are the smallest; when pH 9, particles will grow rapidly. At the same aging time, the aging temperature is higher, the particles are larger. At the same aging temperature, the time is longer, the particles are larger. The particles were characterized by means of XRD, TEM techniques. It was found that the drying and crystallizing could be achieved in one step by SCFD technique.
【Fund】: 国家自然科学基金资助项目(20016004)
【CateGory Index】: TB383
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