目的 以Zn(CH3COO)2·2H2O和NaOH为原料,制备ZnO纳米粒子,并研究ZnO纳米材料的形貌对其光催化性能的影响.方法 采用一步水热法合成ZnO片状纳米粒子,通过X-射线粉末衍射(XRD) ,场发射扫描电镜(FE-SEM )和拉曼光谱(Raman)等分析手段对合成产物的结构和形貌进行表征,探讨反应物摩尔比、水热温度和水热时间等合成条件对形成的ZnO纳米粒子形貌的影响,以及形貌演变机理.通过光催化分解水实验对所制备的ZnO纳米粒子的光催化性能进行测试.结果 Zn2+/OH-摩尔比为1∶4时,在100 ℃反应6 h ,可制得片状的纳米ZnO ,其产氢量为313 μmol·h-1·g-1.结论 在本文制备的ZnO纳米材料中,ZnO纳米片的光催化性能优于短棒状和纤维状的ZnO粒子.%Purposes—To prepare ZnO nanoparticles with zinc acetate dihydrate and sodium hy-droxide as raw materials ,and to investigate the effect of the morphology of ZnO nanomaterials on their photoelectric performance .Methods—ZnO nanoparticles were synthesized with one-step hydro-thermal method .The effects of the molar ratio of reactants ,hydrothermal temperature and hydrother-mal time on the morphology of ZnO nanomaterials were investigated through characterizing structure and morphology of the synthesized samples with XRD ,FE -SEM and Raman .The photocatalytic properties of ZnO nanoparticles were tested with photocatalytic water splitting experiment .Results—T he sheet-like ZnO nanoarticles can be prepared w hen the molar ratio of Zn2+to O H -is 1 to 4 ,the temperature and time of chemical reaction are 100 ℃ and 6 hours ,respectively ,the amount of H2evo-lution for the ZnO is 313 μmol · h-1· g -1. Conclusion—The photoelectric performance of ZnO nanosheets is better than that of rod-shaped and fibrous ZnO particles .
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