| The printing and dyeing wastewater and antibiotic wastewater have the characteristics of complex composition,high concentration of organic pollutants,high toxicity,and difficult biodegradability,and are recognized as one of the most difficult wastewaters to be treated.The discharge of printing and dyeing wastewater and antibiotic wastewater poses a great threat to the water environment and human health.As a new type of pollution treatment technology,photocatalytic technology has a wide range of application prospects because of its high efficiency,low cost,no pollution and simple production.Graphite-like carbon nitride(g-C3N4)semiconductor materials have wide application prospects in the field of photocatalysis because of their good stability,low cost,band structure controllability and high solar energy conversion rate.However,g-C3N4 has the advantages of fast electron hole recombination,small specific surface area and poor photocatalytic activity.At present,photocatalytic activity is improved by physical composite modification and chemical doping modification.In this paper,a series of AgInS2 composite samples were prepared by the oil bath method after the preparation of metal doped g-C3N4 materials by calcination,a series of TiO2 and NaBiO3 binary and ternary composite samples were prepared by rotary evaporation,and a series of Sn/BiOI composite samples were prepared by hydrothermal.The crystal structure,surface topography and optical properties of the composite photocatalyst were studied by X-ray diffraction(XRD),scanning electron microscopy(SEM),UV-visible diffuse reflectance spectroscopy(UV-vis DRS),photoelectron spectroscopy(XPS)and Raman spectroscopy(Raman).Rhodamine B(RhB),reactive brilliant red(X-3B),4-chlorophenol(4-CP)and ofloxacin solutions were used to simulate the printing and dyeing wastewater and antibiotic wastewater,respectively,to research and explore the catalytic performance of the composite photocatalyst.And proposed methods to improve catalytic activity. |
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