BiOBr/TiO_(2)纳米管阵列薄膜的制备及其光催化降解双酚A的性能研究

Preparation of BiOBr/TiO_(2) Nanotube Array Film and Its Photocatalytic Degradation Performance for Bisphenol A

研究了采用阳极氧化—连续离子层吸附反应法在TiO_(2)上原位制备BiOBr/TiO_(2)纳米管阵列(BiOBr/TNTAs)薄膜,并采用SEM、XRD、XPS和电化学工作站等手段进行分析表征,以及在可见光下以BiOBr/TNTAs催化降解双酚A。结果表明:BiOBr/TNTAs薄膜比TNTAs的光催化活性更强;浸渍7次后形成的BiOBr/TNTAs有更好的光催化活性,对双酚A的降解率达81.2%,降解过程符合准一级动力学模型,反应速率常数为5.36×10^(-3) min^(-1),为TNTAs的6倍。自由基捕获试验结果表明,降解过程中,·OH起主导作用。

BiOBr/TiO_(2) nanotube arrays(BiOBr/TNTAs)film was prepared by anodic oxidation method—successive ionic layer adsorption and reaction.As-prepared photocatalyst was characterized by SEM,XRD,XPS and electrochemical workstation,and the influence of the immersion times of BiOBr on the catalytic was assessed in terms of degradation of bisphenol A under visible light.The results show that BiOBr/TNTAs film has stronger photocatalytic activity than TNTAs.BiOBr/TNTAs formed after 7 times of impregnation has better photocatalytic activity,and the degradation rate of bisphenol A can reach 81.2%.The degradation process conforms to the quasi-irst-order kinetic equation and the degradation rate constant is 5.36×10^(-3) min^(-1),which is 6 times that of TNTAs.The results of free radical capture experiment show that·OH plays a leading role in the degradation process.