文献类型：专利

英文题名：Preparation of nano zinc oxide for e.g. water purification, involves mixing and stirring deionized water, polybutadiene microsphere emulsion and potassium persulfate or ammonium persulfate as initiator, and then supplying nitrogen gas

作者：LI L;GUO X;LI W;XU J;FANG D;LI G;ZHANG R

机构：[1]UNIV EAST CHINA SCI&TECHNOLOGY

申请号：CN102976391-A

申请日：2012-12-07

公开日：2013-03-20

语种：英文

收录：DERWENT

摘要：NOVELTY - Deionized water, polybutadiene microsphere emulsion and potassium persulfate or ammonium persulfate as initiator are mixed and stirred. Nitrogen gas is supplied, temperature is increased and then water-soluble monomer acrylic acid is added to reactor and then subjected to thermal-control emulsion polymerization, to obtain spherical polyelectrolyte brush having particle diameter of 140-300 nm. The obtained spherical polyelectrolyte brush is further processed, to obtain nano zinc oxide. USE - Preparation of nano zinc oxide used for high-efficient nano photocatalyst and water purification. ADVANTAGE - The method efficiently and economically provides nano zinc oxide, using simple process. DETAILED DESCRIPTION - Deionized water, polybutadiene microsphere emulsion and potassium persulfate or ammonium persulfate as initiator are mixed, stirred with stirring speed of 300-500 rpm. Nitrogen gas is supplied for 3-5 times, temperature is increased to 70-80 degrees C and continuously reacted for half an hour. Then, water-soluble monomer acrylic acid is added to reactor under the protection of nitrogen, reacted for 1-2 hours and then subjected to thermal-control emulsion polymerization, to obtain spherical polyelectrolyte brush having particle diameter of 140-300 nm. Inorganic alkali chosen from potassium hydroxide and sodium hydroxide solution is added to dialyzed brush, stirred for 0.5-1 hour to make the carboxyl on the polyelectrolyte brush fully dissociate. Then, 0.001-0.002 mol/L zinc acetate or zinc nitrate hexahydrate solution is added, reacted, nitrogen gas is supplied for 3-5 times, temperature is increased to 70-80 degrees C, stirred with rotating speed of 300-500 rpm for 0.5-1 hour to allow zinc ion enter into polyelectrolyte brush. Then, hexamethylenetetramine is dripped into the reactor under the protection of nitrogen with speed of 1-2 drops per second and continuously reacted for 2 to 3 hours, to obtain nano-zinc oxide particles loaded nano-spherical polyelectrolyte brush. The obtained brush is calcined at 500-600 degrees C for 2-3 hours, to obtain nano pure zinc oxide particles.