花状CuS微米球的制备及其光催化性能研究

Preparation of flower-like CuS microspheres and study on photocatalytic properties

以CuCl2·2H2O、硫脲为原料,1,2-丙二醇与水(体积比为2∶1)为溶剂,通过溶剂热法成功制备了形貌新颖、高比表面积、禁带宽度低且具有可见光催化活性的花状CuS微米球。采用XRD、SEM、TG、FT-IR及UV-Vis等手段对其进行表征;同时以亚甲基蓝为目标降解物评价了合成材料在氙灯和汞灯为照射光源时的光催化活性。结果表明,花状CuS微米球在无H2O2辅助下氙灯照射45 min时,亚甲基蓝的降解率可高达99.37%。此外,还分析了花状CuS微米球的生长机理。

Using 1,2-propylene glycol and water( 2 ∶1) as solvent,copper chloride and thiourea as raw materials,the solvent thermal method is used to prepare flower-like Cu S microspheres with novel morphology,high specific surface area,low gap width and visible light catalytic activity.The samples are characterized by XRD,SEM,TG,FT-IR and UVVis.The photocatalytic activity of the prepared materials in the case of xenon lamps and mercury lamps as illumination sources is also evaluated with methylene blue as the degrading target. The results show that the degradation rate of methylene blue can reach 99. 37% over the flower-like Cu S microspheres when it is exposed to xenon lamp for 45 min without H2O2 assistance.In addition,the growth mechanism of flower-like Cu S microspheres is also analyzed.