摘要： 采用传统Hummer法制备氧化石墨烯（GO），以罗丹明B作为目标污染物，研究GO的光降解性能。研究结果表明，GO表现出优异的光降解罗丹明B性能，在GO投加质量浓度为0.15 g/L，罗丹明B质量浓度为10 mg/L（200 mL），300 W 氙灯光照120 min 后，对其降解率达到86.99%；加入1.0 mL H₂O₂，120 min 后光降解率可达到96.14%；羟基自由基捕获实验证明H₂O₂/GO光催化罗丹明B主要遵循羟基自由基氧化机制。在GO投加质量浓度为0.15 g/L，H₂O₂用量为2.0 mL，罗丹明B质量浓度10 mg/L，pH为3，光照10 min降解率达到98%。

关键词: 石墨烯, H₂O₂, 光催化, 羟基自由基, 罗丹明B

Abstract: Graphene oxide(GO)has been prepared by the traditional Hummer method and its photo-degradation capacity observed,using rhodamine B(RhB)as the target pollutant. The results indicate that GO shows excellent photo-degradation capacity for RhB. When the dosing concentration of GO is 0.15 g/L,and the mass concentration of RhB 10 g/L(200 mL),after irradiated under 300 W xenon lamp for 120 min,its RhB degradation rate is more than 86.99%. By adding 1.0 mL of H₂O₂,after 120 min the photo-degradation rate can reach 96.14%. The hydroxyl free radicals capturing experiments proves that H₂O₂/GO photo-catalysis of RhB mainly follows the hydroxyl free radical oxidation mechanism. When the mass concentration of the GO added is 0.15 g/L,the dosage of H₂O₂ 2.0 mL, mass concentration of RhB 10 g/L,pH = 3,and irradiation time 10 min,the degradation rate reaches 98%.

Key words: graphene oxide, H₂O₂, photocatalytic, hydroxyl free radicals, rhodamine B

中图分类号: 

• X703