The Preparation And Activity Study Of Graphene Based Ag@AgX Materials

Three-dimensional network structure of graphene hydrogels processing great specific surface area can make electron transfer quickly. It is an ideal support skeleton photocatalytic composite materials. Ag@Ag Cl nanoparticles have obvious plasmon resonance effect and remarkable photocatalytic activity. Composite graphene hydrogels with Ag@Ag Cl, make the preparation of functionalized graphene Ag@Ag Cl material, realize synergy between the adsorption and photocatalytic degradation.Compared with Ag Cl-r GH by impregnation, Ag@Ag Cl nanoparticles of Ag Cl@r GO-r GH-1 and Ag Cl@r GO-r GH-2 composite materials prepared by chemical reduction method have smaller size-400 nm;And because the GO membrane separation effect, its distribution and morphology are more uniform and neat. At the same time, the photocurrent of Ag Cl@r GO-r GH-2 composite material is 10 times than that of Ag@Ag Cl, 2 times than that of Ag Cl-r GH, 1.2 times than that of Ag Cl@r GO-r GH-1;Accordingly, the impedance of Ag Cl@r GO-r GH-2 is minimum.At the condition of 10 ppm, 100 ml BPA solution and 0.1 g sample, the saturated adsorption capacity of Ag Cl@r GO-r GH-2 is 6.7 mg/g, photocatalytic degradation rate is 79.78%, the synergistic degradation rate is as high as 93.77%. whether pure adsorption and pure photocatalytic degradation, or collaborative purification, Ag Cl@r GO-r GH-2 has higher activity than Ag Cl-r GH and Ag Cl@r GOr GH-1. At the same time, the photocatalytic degradation of BPA in 60 min by Ag Cl@r GO-r GH-2 is above 90%, and Ag Cl@r GO-r GH-2 has best effect under the neutral condition. At the condition of 10 ppm, 0.2ml/min flow rate of BPA solution and 0.5g sample, the saturated adsorption capacity of Ag Cl@r GO-r GH-2 is 0.032mg/g, and its penetration time increases with the percentage of r GH; After the sample reaches adsorption equilibrium, the photocatalytic degradation rate of Ag Cl@r GO-r GH-2decreased with the increase of r GH ratio, and degradation rate gradually stabilized;When collaborative mobile phase test experiment, Ag Cl@r GO-r GH-2 synergistic degradation rate is much higher than even with the conditions of both pure adsorption and pure photodegradation, which shows that synergy method is more effection to purify the organic pollutants.