Ag/WO_(3)纳米复合材料可见光催化还原废水中六价铬的研究  

Photocatalytic Reduction of Chromium(VI)in Wastewater by Ag/WO_(3)Nanocomposite under Visible Light Irradiation

作　　者：刘丽秀[1] 何爱江[1] 姚霞 Liu Lixiu;He Aijiang;Yao Xia(Yibin Vocational Technical College,Yibin 644003,China)

机构地区：[1]宜宾职业技术学院,四川宜宾644003

出　　处：《云南化工》2023年第7期20-22,共3页Yunnan Chemical Technology

基　　金：化工与环保科技创新团队(No.ybzy20cxtd03)。

摘　　要：以钨酸钠和硝酸银为原料,采用水热法合成得到Ag/WO_(3)纳米复合材料。XRD和SEM结构分析表明,Ag纳米颗粒掺入到WO_(3)结构中,增加了孔隙率和粗糙度,增强了纳米复合材料表面的活性位点,提高了有效比表面积。光催化实验表明,分别以WO_(3)和Ag/WO_(3)为光催化剂处理模拟废水中的Cr(Ⅵ)离子,对应在155 min和130 min的可见光照射后,Cr(VI)离子被完全去除。通过考察Ag/WO_(3)对实际工业废水中Cr(Ⅵ)的光催化还原能力,结果表明,该光催化剂在还原工业废水中的Cr(Ⅵ)方面具有良好性能。Ag/WO_(3)nanocomposites were synthesized by hydrothermal method from sodium tungstate and silver nitrate.XRD and SEM structural analysis showed that the incorporation of Ag nanoparticles into WO_(3)structure increased the porosity and roughness,enhanced the active sites on the surface of nanocomposites,and increased the effective specific surface area.UV-vis absorption spectra indicated that the optical band gaps of WO_(3)and Ag/WO_(3)materials were 2.89 and 2.80 eV,respectively.The photocatalysis experiment showed that the Cr(VI)ion in the simulated wastewater was treated with WO_(3)and Ag/WO_(3)nanocomposites as photocatalysts respectively.The Cr(VI)ions were completely removed after 155 and 130 minutes of visible light irradiation respectively.Further experiments suggested that Ag/WO_(3)nanocomposite photocatalyst had good performance in reducing Cr(VI)in industrial wastewater.

关 键 词：Ag/WO_(3) 纳米复合材料 水热法 六价铬 光催化还原 

分 类 号：TQ941[化学工程]