石墨烯/银复合材料的制备及光催化降解罗丹明B研究

Study on Preparation of Graphene/Silver Composites and Its Photocatalytic Degradation of Rhodamine B

以氧化石墨粉为原料,制备氧化石墨(GO)。通过不同质量比的GO和AgNO3与水合肼反应,制备得到石墨烯/银(RGO/Ag)复合材料。以不同时间下测得的罗丹明B的吸光度作为催化剂的光催化活性的判断标准,探究了不同复合比的RGO/Ag光催化剂对废水中有机染料罗丹明B的降解情况。分析材料的粒径、X-射线衍射图谱和红外光谱图,判断复合比的不同对复合材料性能的影响。通过对比罗丹明B在不同催化剂不同时间的吸收曲线及降解率发现,在可见光下,通过75%的GO和25%的AgNO3制备的75%RGO/Ag 0.1 g在光催化剂对30 mL 1×10-5mol/L的罗丹明B降解60 min,降解率达88.07%,降解效率较单纯的RGO提高2倍。

Graphite oxide(GO)is prepared using oxidizing graphite powder as raw material.Graphene/silver(RGO/Ag)composites is prepared by reacting GO and AgNO3 of different mass ratios with hydrazine hydrate.The absorbance of rhodamine B measured at different times is used as the criterion for determining the photocatalytic activity of the catalyst.The degradation of the organic dye rhodamine B in wastewater by RGO/Ag photocatalyst with different composite ratios is investigated.By analyzing the particle size,X-ray diffraction pattern and infrared spectrum of the material,the influence of the difference of the composite ratio on the composite material is judged.By comparing the absorption curves and degradation rates of rhodamine B at different catalysts at different times.It is found that 0.1 g of 75%RGO/Ag photocatalyst prepared with 75%GO and 25%AgNO3,30 mL 1×10-5 mol/L of rhodamine B is degraded under visible light for 60 min,the degradation rate can reach 88.07%,and the degradation efficiency is about 2 times higher than that of pure RGO.