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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.
Sb2S3 nanorods were synthesized by refluxing method using SbCl3, sulfur powder and sodium borohydride (NaBH4) as raw materials and 1,2-propanediol (C3H8O2) SEM, TEM, HRTEM, SAED and UV-Vis were used to characterize the crystal form, composition, morphology and optical properties of the prepared products. The photocatalytic activity of Sb2S3 nanorods was evaluated using sunlight as the light source and methylene blue The results show that the orthorhombic Sb2S3 single crystal nanorods with diameter of about 78 ~ 180nm and length of 2 ~ 5μm can be obtained by refluxing at 186 ℃ for 15h.The lattice parameters a = 1.124nm, b = 1.138nm, c = 0.384nm.UV-Vis analysis shows that the Sb2S3 nanorods are semiconductor materials with a bandgap energy of 1.52eV.The photocatalytic performance tests show that the prepared Sb2S3 nanorods have higher methylene blue in sunlight , Degradation rate of methylene blue reached 84.31% after 20 min, showing obvious visible light activity.The addition of polyvinylpyrrolidone (PVP) plays an important role in controlling the morphology of Sb2S3.In addition, Sb2S3 Possible formation mechanism of nanorods.