abstract

• The catalytic transformation of ortho-(o-NP), meta-(m-NP) and para-nitrophenols (p-NP) by Ag nanoparticles (Ag-NPs) stabilised on zeolite A4 (ZA4) is presented for the first time. The catalysts are prepared by microwave-assisted synthesis (Ag/ZA4-MW) or ion exchange (Ag/ZA4-IE). The results indicate that the nitrophenol reduction rate depends on the molecule structure and the presence of low-coordinated metallic Ag-NPs (similar to 2 nm and sub nanometric species). Meanwhile, the reactivity tendency depends on the synthesis methodology (m-NP>p-NP>o-NP and o-NP>m-NP>p-NP for Ag/ZA4-MW and Ag/ZA4-IE, respectively). The turnover frequency (TOF) values estimated for nitrophenols reduction are superior for Ag/ZA4-MW catalyst by several orders of magnitude compared with those obtained for Ag/ZA4-IE catalyst. In addition, the catalyst exhibits remarkable catalytic stability for the reduction of p-NP even after the fifth consecutive catalytic run. The presently prepared catalysts are characterised by superior catalytic activity for the reduction of nitroaromatic compounds than similar Ag-based materials reported in the literature.

authors

• Acosta Ruelas Brenda Jeanneth
• García-Valdivieso G.
• Horta-Fraijo P.
• José-Yacamán M.
• Navarro Contreras Hugo Ricardo
• Rodríguez Aranda Ma. del Carmen
• Smolentseva E.

publication date

• 2023-01-01

funding provided via

• CONACYT [A1-S-45958, 302286, 299812]; Mantenimiento de Infraestructura Cientifica en Laboratorios Nacionales [2020-314931, 2021-315911, 23871]; U.S. Department of Energy\'s NNSA [117373]; [9233218CNA000001]  Grant

published in

• Chemnanomat  Journal

keywords

• Ag nanoparticles; A4 zeolite; catalytic transformation; microwave-assisted synthesis; nitrophenol isomers SILVER NANOPARTICLES; FACILE SYNTHESIS; REDUCTION; FABRICATION; 4-NITROPHENOL; NANOCATALYST; NANOREACTORS; DEGRADATION; IRRADIATION; PERFORMANCE

Digital Object Identifier (DOI)

• 10.1002/cnma.202200464

PubMed ID

start page

end page

volume

• 9

issue

• 3