水热法制备ZnS/Ag复合纳米线及其光催化性能研究

Phtocatalytic Properties of ZnS/Ag Composite Nanowires Prepared by Hydrothermal Method

摘要:

采用水热法制备了负载Ag的ZnS纳米线，通过XRD, TEM以及UV-Vis对所合成的纳米线的相结构、形貌以及光学性能进行了表征。并以甲基橙为目标降解物，评价了所制备的复合纳米线在紫外光下的光催化性能。研究结果表明，水热法制备的ZnS纳米线对甲基橙溶液的光催化活性比商业ZnS粉体更高，并且银的负载对ZnS纳米线的光催化活性有显著的提高作用。这是由于银粒子复合ZnS纳米线能促进光生电子空穴对分离，增多ZnS纳米线的反应活性点，从而提高其光催化活性

Abstract:

Ag supported ZnS (ZnS/Ag) composite nanowires were prepared by a hydrothermal method. The phase structure, morphology and optical properties of the prepared nanowires were characterized by XRD, TEM and UV-Vis spectrophotometer. With methyl orange as degradation target, photocatalytic performances of the prepared composite nanowires under ultraviolet radiation were evaluated. Results show that the photocatalytic activity of ZnS nanowires prepared by the hydrothermal method was superior to that of commercial ZnS. Meanwhile, the Ag supported ZnS nanowires exhibit higher photocatalytic activity than that of non-supported ZnS nanowires, which is attributed to that Ag particles promote the separation of the pairs of excited electrons and holes, and increase the activity points of ZnS nanowires