微波辅助合成CNB/MIL光催化降解水中罗丹明B

Microwave-assisted synthesis of CNB/MIL for photocatalytic degradation of rhodamine B in water

目的构建可见光响应的异质结光催化材料,高效降解水中有机染料。方法通过微波辅助合成体相氮化碳(carbon nitride bulk,CNB)和金属有机骨架材料MIL^(-1)00(Fe)的异质结(CNB/MIL)。结果表征分析证实CNB/MIL成功合成。在可见光下,90 min内,15 mg CNB/MIL对体积为50 mL、质量浓度为10 mg·L^(-1)的罗丹明B(RhB)的降解率接近100%。降解机理研究表明,OH是光催化过程中的主要活性物种。结论氮化碳与MIL复合,能够起到协同作用,提高材料的可见光响应能力,此外,利用微波辅助法合成可大大缩短材料合成时间,节省能源。

Objective To construct a visible light responsive heterojunction photocatalyst material for efficient degradation of organic dyes in water.Methods Carbon nitride bulk(CNB)and metal-organic framework(MIL^(-1)00(Fe))heterojunction(CNB/MIL)were synthesized by microwave assisted method.Results The characterization analysis confirmed that CNB/MIL was successfully synthesized.Under visible light,the degradation rate of 15 mg CNB/MIL to rhodamine B(RhB)with a volume of 50 mL and a concentration of 10 mg·L~(-1)is close to 100%within 90 minutes.The study of degradation mechanism shows that·OH is the main active species in the photocatalytic process.Conclusions Carbon nitride combined with MIL can play a synergistic role in improving the visible light response of the material.In addition,using microwave assisted synthesis can greatly shorten the synthesis time and save energy.