Synthesis And Photocatalystic Properties Of BiOX(X=Cl,Br,I)

Semiconductor Titanium dioxide(Ti O2) has showed excellent photocatalytic properties, but Ti O2 only own higher photocatalytic performance under UV irradiation, the one route to improve the photocatalytic activity is to search for new photocatalysts. Through exploring the study, people found Bi OX have much higher photocatalytic activity. At present Bi OX has been extensively studied. So we also study the Bi OCl and Bi OX / Zn O composite. Anodic aluminum oxide membrane with highly ordered porous holes was preparated by two-step anodization method.The pore size of anodic aluminum oxide(AAO) membrane is 220 nm ~280 nm and the distance is 30 microns. Photocatalyst of Bi OCl with multi-cellular dendritic was successfully prepared using anodized aluminum(AAO) nanosheets under vacuum conditions. It was characterizated by X-ray Diffraction(XRD), Field Emission Scanning Electron Microscope(FE-SEM), High-resolution Transmission Electron Microscopy(TEM) and UV- visible diffuse reflectance spectroscopy(UV-Vis DRS) for its phase structure, morphology and samples characterized. Under UV irradiation multilayer cellular dendritic Bi OCl degradation of rhodamine B(Rn B) exhibitied higher catalytic activity drops.Zn O is used to improving photocatalytic performance of Bi OX to prepare Bi OX / Zn O composites with better photocatalytic activity. The ethylene glycol monomethyl ether as a solvent to prepare Bi OX / Zn O composites under vacuum conditions. Bi: Zn different proportions affect the catalytic properties were studied. It is also characterized by XRD, FE-SEM, HTEM and UV-Vis DRS for its optical phase structure, morphology and samples. The result showed that Bi OCl exhibited excellent photocatalytic properties when Bi: Zn = 1: 12, but Bi OBr and Bi OI at Bi: Zn = 1: 6, exhibited excellent photocatalytic properties. Degradation rate can be reached 80% in 1h.