WO_3/TNAs光电极光催化降解水中DMP的性能研究  

STUDY ON THE PROPERTY OF PHOTOCATALYTIC DEGRADATION OF DMP ON WO_3/TNAs PHOTOELECTRODES

作　　者：石岩[1,2] 辛言君[2,3] 高孟春[3] 

机构地区：[1]西南科技大学环境与资源学院,四川绵阳621010 [2]青岛农业大学资源与环境学院,山东青岛266109 [3]中国海洋大学环境科学与工程学院,山东青岛266003

出　　处：《水处理技术》2014年第6期96-99,共4页Technology of Water Treatment

基　　金：国家自然科学基金资助项目(51208274);博士后基金资助项目(2013M531651);山东省自然基金资助项目(ZR2012EEQ010)

摘　　要：采用电沉积法制备了WO3/TiO2纳米管阵列(TNAs)光电极,研究了溶液中H2O2、氧气、pH以及不同离子对其光催化降解邻苯二甲酸二甲酯(DMP)的影响。结果表明,WO3掺杂后,明显提高了光电极的光催化性能。光照2h后,DMP的降解率提高了9.3个百分点;H2O2的存在会促进DMP的降解,光催化反应2 h后,DMP的降解率提高了27.9个百分点,达到97.5%;适量的O2可以促进DMP的降解,当O2过量时,光催化反应的效率反而降低;酸性和碱性条件均有利于DMP的降解;当pH分别为3和7时,DMP的降解率比pH为7时的分别提高了38.4个和40.2个百分点。水中Ca2+会促进DMP的降解,而Cl-和SO42-会抑制DMP的降解。当质量浓度低于20 mg/L时,NO3-的存在会抑制光催化反应的进行,而当NO3-质量浓度高于20 mg/L时,则会促进DMP的降解。In this article, WO3/TNAs photoelectrodes were prepared by electro-deposition method. The effects of H2O2, oxygen, pH, and ions on the degradation of Dimethyl phthalate （DMP） were investigated. The results showed that the photocatalytic property of the photoelectrode was significantly improved after the modification by WO3. The degradation rate of DMP was increased by 9.3 percent point after 120 min illumination. H2O2 could promote the degradation of DMP. The degradation rate of DMP was increased by 27.9 percent point and arrived 97.5% after 120 min illumination. Moderate O2 added to the solution had positive effect on the degradation of DMP. However, excessive O2 would hold back its degradation. The degradation rate of DMP was improved in both acidic condition and basic condition. When pH=3, the degradation rate of DMP was increased by 38.4 percent point than that of pH=7, and when pH=11, the degradation rate increased by 40.2 percent point than that ofpH=7. Ca^2＋ could improve the degradation of DMP. Cl^- and SO4^2＋ could restrain the degradation of DMP. When the mass concentration of NO3 was under 20 mg/L, the degradation of DMP was restrained; however, when the concentration of NO3^- was above 20 mg/L, the degradation of DMP could be promoted.

关 键 词：阳极氧化 TNAs光电极 WO3 光催化降解 邻苯二甲酸二甲酯 

分 类 号：X703.1[环境科学与工程—环境工程]