水体系中官能化多壁碳纳米管光致活性氧研究  

Light-induced production of reactive oxygen species by functionalized multi-walled carban nanotubes in water

作　　者：张亚[1] 周磊[1] 曾超[1] 汪祺[1] 高士祥[1] 王遵尧[1] 杨曦[1] 

机构地区：[1]南京大学环境学院,污染控制与资源化研究国家重点实验室,南京210023

出　　处：《环境化学》2013年第7期1253-1256,共4页Environmental Chemistry

基　　金：国家自然科学基金(20977045,21177056);中央高校基本科研业务费专项资金(1112021101)资助

摘　　要：采用间歇超声法制得水体稳定分散的羟基化多壁碳纳米管(MWNT-OH)和羧基化多壁碳纳米管(MWNT-COOH)悬浮液,并考察了它们在氙灯光照下产生活性氧(ROS)的能力.分别以呋喃醇和对氯苯甲酸为鉴定单重态氧(1O2)和羟基自由基(.OH)的分子探针,测得浓度为mgC.L-1级的碳纳米管悬浮液在模拟阳光辐射下生成1O2和.OH的稳态浓度分别可达10-14mol.L-1和10-15mol.L-1.MWNT-OH和MWNT-COOH生成1O2能力接近,但MWNT-OH光致产生.OH能力高于MWNT-COOH.增加碳纳米管浓度(0.8—8 mgC.L-1)可以提高光致活性氧的稳态浓度.Stable aqueous suspensions of hydroxylated multi-walled carbon nanotubes （MWNT-OH） and carboxylated multi-walled carbon nanotubes （MWNT-COOH） were prepared in deionized water via intermittent sonication. Light-induced production of reactive oxygen species （ROS） by MWNT-OH and MWNT-COOH were examined under simulated solar irradiation using a 1000 W Xenon lamp. During 30 h light exposure, steady-state concentrations of 102 and ~ OH were determined at the level of 10 - 14 mol- L- 1 and 10 - 15 mol- L- 1 in the mgC. L-1 suspensions of these two fnnctionalized multi-walled carbon nanotubes （FMWNTs）. Furfuryl alcohol and p-chlorobenzoic acid were used as molecular probes of 102 and · OH, respectively. The results showed that MWNT-OH and MWNT-COOH had similar capacity of producing 1O2 while MWNT-OH generated more ~ OH than MWNT-COOH. Increasing concentrations of FMWNTs promoted the production of ROS.

关 键 词：官能化多壁碳纳米管 活性氧 光化学 

分 类 号：TB383.1[一般工业技术—材料科学与工程]