g-C_(3)N_(4)/Ag/Ag_(2)O复合材料低功率紫外照射下降解罗丹明B

Degradation of Rhodamine B in g-C_(3)N_(4)/Ag/Ag_(2)O Composites under Low Power UV Irradiation

光催化降解技术高效、环保、节能的优点使其在环保领域具有广泛应用前景,为解决环境污染问题提供了新的思路。其中高效催化剂是实现污染物高效光催化降解的关键。g-C_(3)N_(4)半导体材料因优良的热稳定性和化学稳定性、易于合成以及能带结构易调控等优点在催化领域具有广阔的应用前景,但由于纯g-C_(3)N_(4)可见光利用率低、表面积小、导带位置较低,限制了其实际应用中的催化活性。本文通过光诱导还原方法实现了g-C_(3)N_(4)材料表面Ag/Ag_(2)O的原位负载,系统研究了Ag/Ag_(2)O负载量对材料催化性能的影响,实现低功率紫外光催化下水中罗丹明B的快速高效去除,研究发现50 mg的g-C_(3)N_(4)中在0.24 g/L的AgNO3溶液还原得到的g-C_(3)N_(4)/Ag/Ag_(2)O复合材料具有最佳的催化性能。同时将复合材料应用于实际水体中罗丹明B染料的催化降解,取得了良好催化效果。本研究为去除水环境有机物污染提供了一种高效、绿色的解决方法。

The advantages of photocatalytic degradation technology,such as high efficiency,environmental protection and energy saving,make it have a wide range of application prospects in the field of environmental protection,which provides a new way of thinking to solve the problem of environmental pollution.The efficient catalyst is the key to achieve efficient photocatalytic degradation of pollutants.g-C_(3)N_(4) semiconductor material has a broad application prospect in the field of catalysis due to its excellent thermal and chemical stability,easy synthesis,and easy to regulate the energy band structure,etc.However,the catalytic activity in practical applications is limited by the low visible light utilisation,small surface area and low conduction band position of pure g-C_(3)N_(4).In this paper,the in situ loading of Ag/Ag_(2) O on the surface of g-C_(3)N_(4) material was achieved by photo-induced reduction method,and the effect of Ag/Ag_(2) O loading on the catalytic performance of the material was systematically investigated to achieve the rapid and efficient removal of rhodamine B from water under the low-power UV catalysis,which was found to be obtained by the reduction of g-C_(3)N_(4) in 50 mg of g-C_(3)N_(4) in 0.24 g/L of AgNO_(3) solution.C_(3)N_(4)/Ag/Ag_(2)O composite had the best catalytic performance.The composites were also applied to the catalytic degradation of rhodamine B dye in real water bodies,and good catalytic results were achieved.This study provides an efficient and green solution for the removal of organic pollution in the aqueous environment.