CAJ | 학술논문

将不同pH值下制备的Bi2 WO6掺杂到共沉淀法制备的ZrO2-TiO2中合成一系列Bi2 WO6-ZrO2-TiO2复合催化剂用于光催化降解苯。采用了X射线衍射( XRD),N2吸脱附,紫外-可见( UV-Vis)漫反射光谱,傅里叶红外变换光谱( FT-IR)和X光电子能谱( XPS)等手段对催化剂进行了表征。结果表明随着pH值的增大,催化剂晶粒尺寸减小,比表面积增大。 Bi2 WO6的掺杂降低了催化剂的禁带宽度,使催化剂感光范围拓展到可见光区。通过对气相苯的降解实验发现,掺杂pH=7的Bi2 WO6的复合氧化物催化剂的紫外和可见光催化活性最高。
장불동pH치하제비적Bi2 WO6참잡도공침정법제비적ZrO2-TiO2중합성일계렬Bi2 WO6-ZrO2-TiO2복합최화제용우광최화강해분。채용료X사선연사( XRD),N2흡탈부,자외-가견( UV-Vis)만반사광보,부리협홍외변환광보( FT-IR)화X광전자능보( XPS)등수단대최화제진행료표정。결과표명수착pH치적증대,최화제정립척촌감소,비표면적증대。 Bi2 WO6적참잡강저료최화제적금대관도,사최화제감광범위탁전도가견광구。통과대기상분적강해실험발현,참잡pH=7적Bi2 WO6적복합양화물최화제적자외화가견광최화활성최고。
A series of Bi2 WO6 with different pH values doped in ZrO2-TiO2 were prepared by the co-precipitation method to synthe-size Bi2 WO6-ZrO2-TiO2 mixed oxide and was used for photo-catalytic benzene. The catalysts were characterized by XRD,N2 adsorp-tion-desorption,UV-Vis diffuse reflectance spectroscopy,FT-IR and XPS. The results showed that the crystal size of catalyst became smaller and the surface area became larger with increasing pH values of Bi2 WO6 . Doping of Bi2 WO6 decreased the band gap of cata-lysts,which contributed to expand the sensitization range of catalysts to the visible light. The best ultraviolet light and visible light activities were obtained over the mixed oxides catalyst doped Bi2 WO6 at pH=7 in the experiment of catalytic gaseous benzene.