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采用硝酸铋、钼酸铵、柠檬酸和乙基纤维素为原料,通过溶胶-凝胶法制备钼酸铋(Bi_2MoO_6)纳米颗粒。通过X射线衍射(XRD)、傅里叶变换红外光谱(FT-IR)、高分辨扫描电镜(HRSEM)、能谱分析(EDX)、紫外-可见漫散射光谱(DRS)、光致发光光谱(PL)和振动样品磁强计(VSM)等手段对制备的粉末结构、形貌、光磁性和光催化性能进行表征。XRD、FT-IR和EDX结果表明,制备的粉末是具有斜方晶结构的纯单相晶体Bi_2MoO_6。HRSEM图像显示,制备的粉末具有很好的纳米颗粒结构。VSM结果显示制备的纳米颗粒具有超顺磁性。Bi_2MoO_6纳米颗粒的光催化活性实验发现TiO2催化剂的添加提高Bi_2MoO_6纳米颗粒的光催化活性。催化剂Bi_2MoO_6、TiO2和混合氧化物催化剂Bi_2MoO_6-TiO2纳米复合材料对4-氯酚的光催化降解(PCD),发现Bi_2MoO_6-TiO2纳米复合材料的PCD效率比纯Bi_2MoO_6和TiO2催化剂的PCD效率高。
Bi 2 MoO 6 nanoparticles were prepared by sol-gel method using bismuth nitrate, ammonium molybdate, citric acid and ethyl cellulose as raw materials. The structures of the samples were characterized by XRD, FT-IR, HRSEM, EDX, DRS, and photoluminescence PL) and vibrating sample magnetometer (VSM) were used to characterize the structure, morphology, magnetism and photocatalytic performance of the prepared powders. XRD, FT-IR and EDX results show that the prepared powder is a pure single-phase crystal Bi 2 MoO 6 with a rhombic structure. HRSEM images show that the prepared powder has a very good nanoparticle structure. VSM results show that the prepared nanoparticles have superparamagnetism. The photocatalytic activity of Bi 2 MoO 6 nanoparticles shows that the addition of TiO 2 improves the photocatalytic activity of Bi 2 MoO 6 nanoparticles. The photocatalytic degradation (PCD) of 4-chlorophenol by Bi 2 Mo 6 O 6, TiO 2 and mixed oxide Bi 2 MoO 6 -TiO 2 nanocomposites showed that the PCD efficiency of Bi 2 MoO 6 -TiO 2 nanocomposites was higher than that of pure Bi 2 MoO 6 and TiO 2 catalysts.