椰壳活性炭基三元复合光催化剂的合成及降解可溶性污染物性能

Synthesis of activated coconut shell carbon based ternary composite and investigation on its photocatalytic performance for soluble pollutants

鉴于可溶性污染物对水质的污染,采用简单的一步水热合成工艺制备椰壳活性炭(ACSC)负载ZnO和TiO_(2)的三元复合光催化材料(ZnO-TiO_(2)/ACSC),用于在温和条件下光催化降解代表性的可溶有机污染物。对制备样品的形貌、结构等特性进行了相关表征,并探究了其在300 W氙灯照射下对水中罗丹明B和四环素的去除能力,以评估复合材料的光催化性能。结果表明:ZnO-TiO_(2)/ACSC对污染物的协同吸附-光催化作用表现出比纯TiO_(2)更高的光催化降解活性,光照120 min后,罗丹明B在ZnO-TiO_(2)/ACSC上的最高降解率达到89.0%,类似地,光照120 min后,四环素的降解效率达到82.0%。

Considering the pollution of soluble pollutants on water quality,this study used a simple one-step hydrothermal synthesis process to prepare a ternary composite photocatalytic material(ZnO-TiO_(2)/ACSC)loaded with ZnO and TiO_(2)on coconut shell activated carbon(ACSC),which was used for photocatalytic degradation of representative soluble organic pollutants under mild conditions.The morphology,structure and other characteristics of the prepared samples were characterized,and their ability to remove rhodamine B and tetracycline from water under 300 W xenon lamp irradiation was investigated to evaluate the photocatalytic performance of the composite material.The results showed that the synergistic adsorption photocatalytic effect of ZnO-TiO_(2)/ACSC on pollutants exhibited higher photocatalytic degradation activity than pure TiO_(2).After 120 minutes of illumination,the highest degradation rate of rhodamine B on ZnO-TiO_(2)/ACSC reached 89.0%.Similarly,after 120 minutes of illumination,the degradation efficiency of tetracycline reached 82.0%.