花状硫化铜级次纳米结构的制备及可见光催化活性研究

摘要

Flower-like copper monosulfide (CuS) hierarchical nanostructures composed of nanoplates were successfully synthesized by means of a simple solvothermal process, using CuCl2·2H2O as Cu-precursor, CS2 as S-source and ethylene glycol (C2H6O2) as the solvent. The morphology and structure of the product were characterized by X-ray powder diffraction (XRD), scanning elec-tron microscopy (SEM), and transmission electron microscopy (TEM). The optical properties of the copper monosulfide hierarchical nanostructures were investigated by UV-visible absorption spectra. In addition, the photocatalytic activity of the flower-like CuS hier-archical nanostructures were evaluated by the degradation of methyl orange solution under natural light. Results demonstrate that the as-prepared flower-like CuS hierarchical nanostructures possess high photocatalytic performance, the degradation rate is up to 100%after 90 min degradation under the irradiation of natural light, which is much higher than bulk CuS powder. The formation mechanism of flower-like CuS hierarchical nanostructures was preliminarily analysed, alss.%　　本实验以氯化铜(CuCl2·2H2O)和二硫化碳(CS2)为原料，以乙二醇(C2H6O2)为溶剂，通过溶剂热法成功制备了具有可见光活性的花状硫化铜(CuS)级次纳米结构。并利用 X 射线粉末衍射技术(XRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)等技术对其进行了表征，利用紫外可见吸收光谱(Uv-vis)分析了其光学性能，并以甲基橙为目标降解物对其可见光催化活性进行了研究。结果表明：花状 CuS 级次纳米结构具有很高的可见光催化活性，与体相 CuS 粉末相比有很大的提高，在自然光照射下对甲基橙的降解率可以达到100%。同时本文对花状级次纳米结构的形成机理进行了分析。