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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.
Hydroxylated multi-walled carbon nanotubes (MWNT-OH) and carboxylated multi-walled carbon nanotubes (MWNT-COOH) suspensions were prepared by intermittent sonication. The effects of reactive oxygen species ) Were investigated.Franol and p-chlorobenzoic acid were used as molecular probes for the identification of singlet oxygen (1O2) and hydroxyl radicals (.OH), respectively, and the concentration of carbon nanotube suspension The steady-state concentrations of 1O2 and .OH generated by simulated solar radiation were close to 10-14mol.L-1 and 10-15mol.L-1.MWNT-OH and MWNT-COOH, respectively, but the MWNT-OH light OH-producing ability is higher than that of MWNT-COOH. Increasing the concentration of carbon nanotubes (0.8-8 mgC.L-1) can increase the steady-state concentration of photoactive oxygen.