埃洛石纳米管表面修饰及其对次甲基蓝的吸附研究

采用硅烷偶联剂对埃洛石纳米管（HNTs）进行表面修饰,通过透射电子显微镜（TEM）、红外光谱仪（FTIR）、分光光度计等对HNTs的结构和吸附性能进行了表征。结果表明,硅烷偶联剂通过化学键实现了对HNTs的表面修饰,提高了HNTs在溶液中的分散稳定性;适当提高溶液温度、延长吸附时间及增加溶液pH值有助于提高HNTs对次甲基蓝的吸附量。当溶液温度为303K,吸附时间为90min,溶液pH值为7时,表面修饰HNTs的吸附量可达8.91mg/g,相对于表面未修饰HNTs（同等条件下的吸附量为7.83mg/g）明显提高。吸附后的表面修饰HNTs经过再生处理后,吸附量可达到7.66mg/g。

Modification of Halloysite Nanotubes and Their Adsorption on Methylene Blue

Halloysite nanotubes（HNTs） were modified with silane coupling agent.The structure and adsorption properties of HNTs were characterized by TEM,FTIR,spectrophotometer,etc.Results show that silane is chemically bonded onto HNTs,lead to the improved dispersion stability of HNTs in solution.Increases temperature,prolongs adsorption time,and elevates pH value,results in the improvement of HNTs＇ adsorption capacity on methylene blue.When the temperature is 303 K,adsorption time is 90 min,and the pH value is 7,the adsorption capacity of the modified HNTs is about 8.91 mg/g,which is higher than that of the unmodified ones（7.83 mg/g,under the same condition）.After regeneration,the adsorption capacity of the adsorbed modified HNTs is able to reach 7.66 mg/g.