Preparation And Photocatalytic Properties Of ZnO(S) Semiconductor Composites

ZnO(S) semiconductor composite is one kind of new and efficient photocatalytic materials developed in recent years and has broad application prospects in solving environmental pollution. In this paper, ZnS/PSt, Fe3 +/Cu2 + doped ZnO on aluminum substrate and ZnO/GO composites were prepared through several simple reactants from an organic material, metals, inorganics three aspects. The morphology, structure and the performance of photocatalytic of the composites were studied. The main contents are as follows:1.The modified polystyrene firstly was prepared through dispersion polymerization by a polycondensation reaction between the unsaturated double bonds of styrene and KH-570. Then zinc sulfide/polystrene core-shell composite have been successfully prepared using modified polystyrene as template through chemical assembly. The structure of synthesized products were characterized by Fourier transform infrared and thermo gravimetric analysis, the micrographs of samples were characterized by scanning electron microscopy and transmission electron microscopy. The UV–vis absorption spectroscopy was used to characterize the properties of composite. The results showed the coating thickness of zinc sulfide shell can be controlled by the amount of 3-methacryloxypropyltrimethoxysilane and the UV-vis absorption intensity of zinc sulfide/ polystyrene composite also were verified with the coating thickness of zinc sulfide.2.The oriented Fe or Cu-doped ZnO nanoplates were fabricated on the Al substrates using the water bath heating method with Zinc nitrate and hexamethylene tetramine as reactant, copper nitrate or ferric chloride as doping agent. The scanning electron microscopy(SEM) was used to characterize the morphology of ZnO nanoplates. The results show that the doping element content has a certain effect on the morphology of ZnO structure. X-ray electron diffraction results show that iron or copper doping element had been incorporated into zinc oxide and existed with the form of oxide. The prepared Fe or Cu-doped ZnO nanoplates were used to visible light catalytic methyl orange. The results show that Cu or Fe-doped ZnO had an impact on the photocatalytic properties of ZnO and the content of Fe or Cu influenced the degree of photocatalytic.3. GO was obtained through closed oxidation methods. And using Zn(NO3)2, HMTA and GO by hydrothermal method prepared Zn O/GO composites. The morphology and structure were characterized by scanning electron microscopy(SEM)、specific surface area(BET) 、X-ray diffraction(XRD) and fourier infrared spectrum(FT-IR). The photocatalytic activity of composites was characterized through degradation of methyl orange. The results shows that ZnO/GO composites has good photocatalytic degradation for methyl orange and the degradation ability related to the concentration of GO.