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光催化降解有机废水可以实现在降解污染物同时回收清洁能源.本研究采用简单沉淀法制备了CuO/SnO2系列复合光催化剂,并用XRD、TEM对其结构进行表征.分别考察了氧化铜含量和乙醇浓度对复合材料光催化产氢性能的影响.实验结果表明,通过氧化铜与二氧化锡适当比例复合能显著提高复合材料的光催化产氢性能.复合材料48.51%CuO/SnO2的产氢性能比纯二氧化锡提高了近5倍.乙醇的浓度也对复合材料的产氢性能有较大影响,最佳的乙醇浓度为2.00 mol.L-1左右.长时间光催化产氢结果表明,每降解废水中1 kg的COD可产生氢气3724 mL.另外,对复合材料光催化分解乙醇的产氢机理也进行了分析.
Photocatalytic degradation of organic wastewater can be achieved in the degradation of pollutants and clean energy recovery.In this study, CuO / SnO2 composite photocatalyst was prepared by simple precipitation method and characterized by XRD and TEM.The effects of copper oxide content and ethanol Concentration on the photocatalytic hydrogen production performance of the composites.The experimental results show that the photocatalytic hydrogen production performance of the composites can be significantly improved by proper proportion of copper oxide and tin dioxide composite.Hydrogenic performance ratio of 48.51% CuO / SnO2 The pure tin dioxide increased by nearly 5 times.The concentration of ethanol also has a greater impact on the hydrogen production performance of the composite material, the best concentration of ethanol is about 2.00mol.L-1.Copper hydrogen production results show that each Degradation of 1 kg of COD in wastewater can produce 3724 mL of hydrogen.In addition, the mechanism of hydrogen production by photocatalytic decomposition of ethanol by composite materials was also analyzed.