Z型异质结CuFe_(2)O_(4)/ZnIn_(2)S_(4)的构筑及其光催化降解TNT

Construction of Z-scheme heterojunction CuFe_(2)O_(4)/ZnIn_(2)S_(4) and its photocatalytic degradation of TNT

针对弹药装填物TNT处废过程中能耗高、不安全,且对环境产生污染的问题,本研究利用绿色无二次污染的光催化技术,通过水热法成功制备出Z型异质结CuFe_(2)O_(4)/ZnIn_(2)S_(4)光催化材料,并运用XRD、BET等系列表征方法确定了CuFe_(2)O_(4)/ZnIn_(2)S_(4)的组织结构与形貌特征,分析了其光催化性能和降解TNT机理。CuFe 2O 4的引入有效促进了光生载流子的分离,延长了光生载流子的寿命。实验表明,3%CuFe_(2)O_(4)/ZnIn_(2)S_(4)复合材料表现出最佳的降解效果,在2 h内能够降解77.07%的TNT。相较于CuFe 2O 4和ZnIn 2S 4来说,降解效果提高了49.52%和30.24%,利用研究构筑的Z型异质结CuFe_(2)O_(4)/ZnIn_(2)S_(4),有效提升了废弃TNT的降解质效和安全性,消除了对环境的污染,降低了处理成本,是一种高质效、低成本进行废弃TNT降解的科学方法。

To address the problems of high energy consumption,insecurity and environmental pollution in the TNT disposal process of munitions loadings,this study successfully prepared Z-scheme heterojunction CuFe_(2)O_(4)/ZnIn_(2)S_(4) photocatalytic material by hydrothermal method using the green photocatalytic technology with no secondary pollution,and used a series of characterization methods(such as XRD and BET)to determine the organization and morphological characteristics of CuFe_(2)O_(4)/ZnIn_(2)S_(4) and morphological features,and analyzed its photocatalytic performance and TNT degradation mechanism.The introduction of CuFe 2O 4 effectively promoted the separation of photogenerated charge carriers,extended the life of photogenerated carriers.The experiments showed that the 3%CuFe_(2)O_(4)/ZnIn_(2)S_(4) composite showed the best degradation effect of 77.07%of the TNT within 2 h.Compared with CuFe 2O 4 and ZnIn 2S 4,the degradation effect is improved by 49.52%and 30.24%.Using the Z-scheme heterojunction CuFe_(2)O_(4)/ZnIn_(2)S_(4),it effectively improves the degradation efficiency and safety of the waste TNT,eliminates the environmental pollution,and reduces the treatment cost.It is a scientific method for the waste TNT degradation with high quality and efficiency and low cost.