负载型Li/CNTS-TiO_2光催化剂降解海洋柴油污染的研究及应用  

Research and application of photocatalytic degradation of diesel pollutants in seawater by supported Li/CNTS-TiO_2

作　　者：王力萍 于晓彩 刘京华 郭美岑 聂志伟 杨夯 WANG Li-ping;YU Xiao-cai;LIU Jing-hua;GUO Mei-cen;NIE Zhi-wei;YANG Hang(College of Ocean Technique and Environment,Dalian Ocean University,Dalian 116023,China)

机构地区：[1]大连海洋大学海洋科技与环境学院,辽宁大连116023

出　　处：《大连海洋大学学报》2018年第4期509-513,共5页Journal of Dalian Ocean University

基　　金：辽宁省科学事业公益研究基金资助项目(20170002);辽宁省海洋与渔业厅科研项目(201733);辽宁省大型仪器设备共享服务能力建设补贴项目(2016LD0105)

摘　　要：为研发高效复合光催化剂降解海洋石油污染,采用溶胶-凝胶法成功制备Li/CNTS-TiO_2复合光催化剂,并在聚丙烯多面球上负载得到负载型Li/CNTS-TiO_2光催化剂,运用X射线衍射(XRD)、扫描电镜(SEM)等技术对Li/CNTS-TiO_2光催化剂进行表征,在室外光照条件下,考察了催化剂负载量、反应时间、柴油初始浓度等因素对催化剂去除海水中柴油污染的影响,用正交试验法确定了负载型Li/CNTS-TiO_2光催化剂处理海洋柴油污染的优化条件,并利用自制的模拟海洋石油污染装置在室外条件下进行了较大规模的验证试验。结果表明:将2.0 g复合型Li/CNTS-TiO_2光催化剂负载于两个聚丙烯球上得到负载型Li/CNTSTiO_2光催化剂,当柴油初始浓度为100 mg/L、室外光照时间为4 h时,柴油去除率最高(91.87%);在自制模拟海洋石油污染装置条件下,负载型光催化剂可以连续使用且对初始浓度为10 mg/L的柴油光催化降解效果良好,降解率达到92.89%;负载型Li/CNTS-TiO_2光催化剂对初始浓度为100 mg/L的原油光催化降解率为99.72%。研究表明,Li/CNTS-TiO_2光催化剂为海洋柴油污染的处理提供了一种环境友好的途径。The Li/CNTS-TiO2 composite photocatalysts were successfully prepared by sol-gel method and the supported Li/CNTS-TiO2 photocatalysts were obtained by loading Li/CNTS-TiO2 on the surface of polypropylene spheres and were characterized by XRD,SEM and other methods.The photocatalytic degradation efficiency of diesel was investigated under outdoor light conditions by various parameters including amount of catalyst used for load,reaction time and the initial concentration of diesel to optimize conditions for the treatment of marine diesel pollutant by Li/CNTS-TiO2 photocatalyst.A large-scale verification test was carried out with a homemade simulated device that simulated the marine environment under outdoor conditions,and the supported Li/CNTS-TiO2 photocatalyst was obtained by loading 2.0 g Li/CNTS-TiO2 photocatalyst on the surface of two polypropylene spheres.The removal diesel rate of 91.87%was observed at initial diesel concentration of 100 mg/L for 4 h under outdoor light.The supported Li/CNTS-TiO2 photocatalyst was continuously used with good removal effect under the conditions of self-made simulated marine oil pollution device,with the photocatalytic degradation rate of 92.89%for diesel and 99.72%for crude oil,indicating that the supported Li/CNTS-TiO2 photocatalyst is a friendship photocatalyst for treatment of marine diesel pollution.

关 键 词：负载型光催化剂 室外光照 海洋油污染 

分 类 号：P734.2[天文地球—海洋化学]