Preparation and photocatalytic performance of porous ZnO microrods loaded with Ag

载银氧化锌多孔微棒的合成与光催化性能(英文)

Porous silver-modified ZnO microrods photocatalysts were synthesized through direct thermal decomposition of the Ag-doped zinctartrate precursor,which was prepared by homogeneous precipitation method at 80 °C for 2 h.The obtained samples were characterized by XRD,FTIR,TG？DTA and UV-VIS absorption spectroscopy.The photocatalytic activity of the as-prepared porous Ag/ZnO microrods was tested with the photocatalytic degradation of methyl orange.The results indicate that doping Ag greatly improves the photocatalytic efficiency of ZnO and 3% Ag-doped（mole fraction） ZnO porous microrod photocatalyst exhibits the highest photocatalytic decolorization efficiency,leading to as much as 80% reduction of MO concentration in 120 min.Moreover,the 3% Ag-doped porous microrods also possess higher photocatalytic activity under the real sunlight irradiation.

采用均匀沉淀法于80°C下水热2h合成棒状掺银酒石酸锌,以此为前驱体通过直接热分解制备不同含银量的多孔载银氧化锌微米棒。利用X射线衍射仪(XRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)、紫外可见光谱(UV-VIS)和傅里叶红外光谱(FTIR)等手段对所得产物的结构和形貌进行表征,并进一步研究多孔载银氧化锌的光催化活性。结果表明:银的掺入提高了多孔氧化锌的光催化效率。掺杂量为3%(摩尔分数)的多孔氧化锌微棒的光催化效率最高,在120min内可使80%的甲基橙降解,且在太阳光下显示良好的光催化活性。