The adsorption and recovery of metal ions,especially noble metal ions,in aqueous solutions have received increasing attention.Although polyacrylic acid is a promising adsorbent for metal ions,its solubility in water limits its widespread application.This solubility problem can be solved by modifying polyacrylic acid to facilitate the adsorption of metal ions in water.In this study,carbon nanotubes/chitosan/sodium acrylate(CNTs/CS/PAA-Na)aerogels were successfully synthesized as efficient metal adsorbents in aqueous solution.At room temperature,CNTs/CS/PAA-Na exhibited remarkable metal ion adsorption at room temperature with an adsorption capacity of 27.6 mg/g for Cu(Ⅱ)and 30.4 mg/g for Pd(Ⅱ).In addition,Cu(Ⅱ)and Pd(Ⅱ)absorbed on CNTs/CS/PAA-Na can catalyze the hydrogenation of p-nitrophenol.In this one-step way,the recycle and reuse of noble metal ions have been realized,providing a novel strategy for resource utilization of noble metal ions.
关键词
聚丙烯酸气凝胶/吸附/贵金属回收/催化应用
Key words
polyacrylic aerogels/adsorption/noble metal recycling/catalysis application
万方数据