Microwave Synthesis of Ce/BiVO 4 Nanocomposites Photocatalyst and Their Photocatalytic Properties

Ming-Huang Tuo, Shuibin Yang, Xuehong Liao
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引用次数: 0

Abstract

Ce/BiVO4 nanocomposites photocatalyst was synthesized by direct feeding microwave synthesis method, using bismuth nitrate (Bi (NO3)3·5H2O), cerium nitrate hexahydrate (Ce (NO3)3·6H2O) and ammonium metavanadate (NH4VO3) as raw material and sodium dodecyl sulfate (SDS) as surfactant. The X-ray diffractometer (XRD) and the scanning electron microscopy (SEM) technology were used to characterize the Ce/BiVO4 nanocomposites. We investigated the photocatalytic activity of the as-prepared photocatalyst, and methyl orange was used as organic pollutant. The results show that the Ce/BiVO4 nanocomposite was a good photocatalyst under visible light. In 100 ml of 5 mg/L methylene orange solution, when the catalyst calcined at 673 K was 0.1 g, hydrogen peroxide was 0.5 ml, pH was 2.0, and the degradation ratio of catalyst for methylene orange reached 90.26% within 70 min.
微波合成Ce/BiVO4纳米复合光催化剂及其光催化性能
以硝酸铋(Bi(NO3)3·5H2O)、六水合硝酸铈(Ce(NO4)3·6H2O)和偏钒酸铵(NH4VO3)为原料,十二烷基硫酸钠(SDS)为表面活性剂,采用微波直接进料法合成了Ce/BiVO4纳米复合光催化剂。采用X射线衍射仪(XRD)和扫描电子显微镜(SEM)技术对Ce/BiVO4纳米复合材料进行了表征。以甲基橙为有机污染物,研究了所制备的光催化剂的光催化活性。结果表明,Ce/BiVO4纳米复合材料在可见光下是一种良好的光催化剂。在100毫升5毫克/升的甲基橙溶液中,当催化剂在673 K下煅烧为0.1克,过氧化氢为0.5毫升,pH为2.0时,催化剂对甲基橙的降解率在70分钟内达到90.26%。
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