纤维素基载银水凝胶对亚甲基蓝的催化还原性能

打开文本图片集

中图分类号： 0636.1+1 文献标识码：A DOI：10.7535/hbkd.2025yx03004

Catalytic reduction of methylene blue using cellulose-based silver-loaded hydrogels

GAO Kairu，ZHANG Xinyao，CUI Maoqi，YUAN Miao，LIU Shaojie （Schoolof Chemical and Pharmaceutical Engineering，Hebei Universityof Science and Technology， Shijiazhuang，Hebei O50o18，China）

Abstract：In viewof theproblem thatitisdificult tobalance the highcatalyticactivityandeasyrecoveryof silver nanoparticles （ Ag NPs）catalyst in the catalytic reduction of methylene blue（MB），a cellulose-based silver-loaded hydrogel （TOC-CMC-Ag）was prepared and its catalytic reduction performance to MB was studied.Firstly，TOC-CMC hydrogels were prepared with oxidized cellulose（TOC）and carboxymethylcelulose（CMC）as raw materials and epichlorohydrin（ECH）as cross-linkingagent.Theefectof CMCsubstitution degree ontheirswelingandadsorption propertieswasstudied.Then， TOC-CMC- Ag was prepared by in-situ reduction method using the TOC-CMC hydrogel with the best adsorption performance as thecarrier.Theproductionwas characterized by transmision electron microscopyand X-rayphotoelectron spectroscopy.

Finally，the catalytic reduction performance of TOC-CMC- on MB was studied. The results indicate that TOC-CMC-Ag can completely reduce MB within4minutes.After7catalyticcycles，MBcouldstillbecompletelyreduced：The prepared silver loaded hydrogel with highcatalyticactivityandeasyrecovery providesanew wayforthedevelopment of catalyticreduction catalyst with excellent comprehensive performance.

Keywords：polymer composites；celulose-based hydrogels；silver nanoparticles；catalytic reduction; methylene blue

亚甲基蓝（methylene blue，MB）是常见的水溶性染料之一，在水性介质中以离子形式存在，因含有偶氮、杂环和芳环等基团，MB具有较大的毒性[1-4]。（剩余13283字）