摘要
水溶液中金属离子的回收一直以来都是研究热点,其中贵金属离子的吸附和循环利用广受关注。聚丙烯酸在金属离子吸附中具有广阔前景,但其在水中的易溶解性限制了聚丙烯酸在水溶液中的广泛应用。因此,对聚丙烯酸进行改性解决其水溶性问题,有利于实现聚丙烯酸材料在水溶液中的金属离子吸附。本文成功制备了碳纳米管/壳聚糖/丙烯酸钠(CNTs/CS/PAA-Na)复合气凝胶,以作为水溶液中金属离子的高效吸附剂,在室温下对Cu(Ⅱ)和Pd(Ⅱ)分别达到27.6 mg/g和30.4 mg/g的吸附容量。此外,Cu(Ⅱ)和Pd(Ⅱ)被吸附到CNTs/CS/PAA-Na上形成的新材料能被应用于催化对硝基苯酚的加氢反应,展现出高效的催化性能。整个过程中,贵金属离子实现了一站式回收和再利用,为贵金属离子资源化利用提供了一种新策略。
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.
作者
识文达
欧阳宇欣
王梁炳
SHI Wenda;OUYANG Yuxin;WANG Liangbing(State Key Laboratory for Powder Metallurgy,School of Materials Science and Engineering,Central South University,Changsha,410083,China)
出处
《贵金属》
CAS
北大核心
2024年第1期45-55,共11页
Precious Metals
基金
中国科协青年人才托举工程(No.YESS20200031)
中南大学科研启动基金(No.502045005)
浙江新和成股份有限公司产学研合作项目
宁波锋成先进能源材料研究院有限公司产学研合作项目。
关键词
聚丙烯酸气凝胶
吸附
贵金属回收
催化应用
polyacrylic aerogels
adsorption
noble metal recycling
catalysis application
