Ag/AgBr/Bi_4O_5Br_2复合催化剂的合成及性能研究

Preparation and Properties of Ag/AgBr/Bi_4O_5Br_2 Composite Photocatalyst

以AgNO_3为Ag源,在Bi_4O_5Br_2纳米片表面通过原位离子交换反应制备了Ag/AgBr/Bi_4O_5Br_2复合催化剂。利用XRD,TEM,紫外-可见吸收光谱等测试手段,对所合成样品的相结构、微观形貌、光学性能等进行了表征分析。以双酚A为目标污染物,考察了Ag/AgBr/Bi_4O_5Br_2粉体对污染物在可见光照射下的光催化降解性能。研究结论表明,20%Ag/AgBr/Bi_4O_5Br_2样品表现出最强的光催化活性,光照120 min后对双酚A的分解率为85%。

Ag/AgBr/Bi4O5Br2 composite photocatalysts of Ag/AgBr nanoparticles loaded on Bi4O5Br2, nanoplates were prepared by in situ ion exchange method using AgNO3 as the Ag source. The phase structure, morphology and optical property as-prepared Ag/AgBr/Bi4O5Br2 powders were characterized by X-ray diffraction, transmission electron microscopy and ultraviolet-visible adsorption spectra. Photocatalytic degradation of bisphenol A was carried out to evaluate the photocatalytic activity of the Ag/AgBr/Bi4O5Br2 photocatalysts under visible-light irradiation. The photocatalytic results show that 20wt%Ag/AgBr/Bi4O5Br2 showed the highest photoactivity and 85 % of Bisphenol A were photodegraded after being visible light irradiated for 120 min.