Core-shell Fe3O4@catechol-formaldehyde trapped satellite-like silver nanoparticles toward catalytic reduction in cationic and anionic dyes. (August 2022)

• Record Type: Journal Article
• Authors: Liu, Yujie; Zhou, Haijun; Wang, Jinling; Li, Shiyun; Li, Zhaolei; Zhang, Jiaoxia
• Is Part Of: Vacuum. Volume 202(2022)
• Publication Date: 2022-08
• Subjects: Catechol-formaldehyde -- Fe3O4@CFR@Ag nanoparticles -- Catalysis -- Organic dyes; Vacuum -- Periodicals; 621.55
• DOI: 10.1016/j.vacuum.2022.111204
• Languages: English
• ISSNs: 0042-207X

Abstract

Abstract: Noble metal nanoparticles have excellent catalytic properties for organic dyes, and finding suitable carriers to deal with the extremely agglomerated noble metal nanoparticles has become a hot research topic. In this work, phenolic resin with strong sticky similar to mussel was obtained by polycondensation, Fe3 O4 NPs were obtained by hydrothermal method, and a core-shell Fe3 O4 @catechol-formaldehyde trapped satellite-like silver nanoparticles (denoted as Fe3 O4 @CFR@Ag) were obtained by reduction of Fe3 O4 @CFR loaded silver without external reducing agent. The existence of CFR shell ensured the silver nanoparticles were distributed like a satellite. Fe3 O4 @CFR@Ag exhibited excellent catalytic selective activity and recoverability for organic dyes. In particular, the catalytic performance of Fe3 O4 @CFR@Ag for the cationic dye methylene blue MB was higher than that of the anionic dye methyl orange MO due to electrostatic interactions. The Fe3 O4 @CFR core-shell structure with simple synthesis and friendly to the environment will be a reliable platform to realize multi-functionalization of nanomaterials. Highlights: Fe3 O4 @CFR material trapped satellite-like silver nanoparticles was prepared by using magnetic Fe3 O4 as the core material and CFR with strong sticky similar to mussel as the shell material. The CFR acted as both a carrier and a reducing agent for the nano-silver without adding any external reducing agent. The Fe3 O4 @CFR@Ag has excellent catalytic and cycling properties for organic pollutants.