中文摘要：

以三氯化锑（SbCl3）、硫粉（S）和硼氢化钠（NaBH4）为原料,1,2-丙二醇（C3H8O2）作溶剂,用回流法成功合成了Sb2S3纳米棒.用XRD,EDS,SEM,TEM,HRTEM,SAED以及UV-Vis等手段对所制备产品的晶型、成分、形貌和光学特性进行了表征;以太阳光为光源、亚甲基蓝为目标降解物评价了Sb2S3纳米棒的光催化活性.结果表明,经186℃回流15h可得到直径约为78～180nm、长度达2～5μm的正交晶系的Sb2S3单晶纳米棒.经计算,其晶胞参数a=1.124nm,b=1.138nm,c=0.384nm.UV-Vis分析表明,Sb2S3纳米棒为半导体材料,其带隙能量为1.52eV.光催化性能测试表明,所制备的Sb2S3纳米棒在太阳光下对亚甲基蓝具有较高的光催化降解率,经20min降解,亚甲基蓝的降解率达84.31%,表现出明显的可见光活性.加入的聚乙烯吡咯烷酮（PVP）对控制Sb2S3的形貌有重要的作用.另外,还讨论了Sb2S3纳米棒可能的形成机理.

英文摘要：

Antimony trisulfide （Sb2S3） nanorods were successfully synthesized via refluxing method,using antimony trichloride （SbCl3）,sulfur powders （S） and sodium borohydride （NaBH4） as starting materials,1,2-propanediol as solvent.The phase,morphologies,compositions and optical properties of the products were investigated by XRD,EDS,SEM,TEM,HRTEM,SAED and UV-Vis techniques.The sunlight was used as light source to investigate the photocatalytic activity of Sb2S3 nanorods for the degradation of methylene blue.The results show that the Sb2S3 nanorods with a single crystal structure can be obtained under refluxing at 186 ℃ for 15 h.The nanorods are typically 78～180 nm in diameter and 2～5 μm in length,and are orthorhombic phase with calculated cell parameters of a=1.124 nm,b=1.138 nm and c=0.384 nm.UV-Vis analysis exhibits that Sb2S3 nanorods are a semiconductor with bandwidth Eg=1.52 eV.Photocatalytic tests show that the as-prepared Sb2S3 nanorods have high photocatalytic degradation rate for methylene blue under sunlight,and the photocatalytic degradation rate of methylene blue is up to 84.31% after 20 min degradation,exhibiting obvious visible-light activity.Polyvinyl pyrrolidone （PVP） plays an important role in controlling the morphology of Sb2S3.In addition,the possible growth mechanism of Sb2S3 nanorods was also discussed.