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采用硝酸酸煮法氧化改性了碳纳米管.红外光谱仪的测定结果表明改性碳纳米管表面引人了羟基(-OH)、羰基(-C=O)等官能基团,比表面仪测定结果显示改性碳纳米管表面积略有增加.采用改性碳纳米管进行了吸附Pb2+的研究,结果表明其吸附除Pb2+效能较未改性的碳纳米管有了显著提高,在所实验的温度范围内吸附等温线符合Langmuir方程,反应级数为三级.
The modified carbon nanotubes were modified by nitric acid to oxidize carbon nanotubes.The results of infrared spectroscopy showed that functional groups such as hydroxyl group (-OH) and carbonyl group (-C = O) were introduced on the surface of modified carbon nanotubes, The results showed that the surface area of the modified carbon nanotubes increased slightly.The study on the adsorption of Pb2 + by modified carbon nanotubes showed that the adsorption of Pb2 + was significantly improved than that of the unmodified carbon nanotubes, The adsorption isotherms fit the Langmuir equation and the reaction order is three steps.