α-MnO_2对ZnO和TiO_2光催化降解萘酚蓝黑活性的影响

Influence of α-MnO_2 Particles on the Photocatalytic Degradation of Naphthol Blue Black over ZnO and TiO_2

以萘酚蓝黑为模型污染物,采用光催化降解动力学实验研究了α-MnO2颗粒物对亚微米级商品TiO2(C),ZnO(C)和自制纳米级TiO2(N),ZnO(N)光催化活性的影响,并通过紫外-可见漫反射光谱和荧光光致发光光谱对光催化剂进行了表征.结果表明,α-MnO2能导致2种TiO2严重失活,而对2种ZnO的光催化活性影响很小.

The influences of α-MnO2 particles on the photocatalytic activity of the commercial ZnO and TiO2 micro-particles,and the synthesized ZnO and TiO2 nanoparticles for the degradation of naphthol blue black were investigated by using a kinetical method.The photocatalysts were characterized by UV-vis diffuse reflectance and photoluminescence spectroscopy.The results showed that the α-MnO2 particles deactivated the TiO2 catalysts significantly,but had little influence on the ZnO catalysts.