TY - JOUR
T1 - Catalytic Transformation of Positional Nitrophenol Isomers on Highly Active Ag/Linde-Type A4 Zeolite
T2 - A Comparative Analysis
AU - Horta-Fraijo, Patricia
AU - García-Valdivieso, Guadalupe
AU - Rodríguez-Aranda, M. C.
AU - Navarro-Contreras, Hugo R.
AU - Londoño-Calderón, Alejandra
AU - José-Yacaman, Miguel
AU - Smolentseva, Elena
AU - Acosta, Brenda
N1 - Funding Information: The authors thank Eduardo Arenas for his technical support. This work was funded by CONACYT thought the projects A1‐S‐45958, 302286 and 299812, Mantenimiento de Infraestructura Científica en Laboratorios Nacionales 2020‐314931, 2021‐315911, FAI‐UASLP, COPOCYT (escrow 23871) and SENER‐CONACYT (117373). This work was partially performed at the Center for Integrated Nanotechnologies, an Office of Science User Facility operated for the U.S. Department of Energy (DOE) Office of Science. Los Alamos National Laboratory, an affirmative action equal opportunity employer, is managed by Triad National Security, LLC for the U.S. Department of Energy's NNSA, under contract 9233218CNA000001. The authors thank the access and use of the equipment in the Laboratorio Nacional de Análisis Físicos, Químicos y Biológicos‐UASLP, México. The authors thank “Investigadoras e Investigadores por México” program. Patricia Horta Fraijo and Guadalupe García Valdivieso thank CONACYT by the grant for academic postdoctoral stay. Funding Information: The authors thank Eduardo Arenas for his technical support. This work was funded by CONACYT thought the projects A1-S-45958, 302286 and 299812, Mantenimiento de Infraestructura Científica en Laboratorios Nacionales 2020-314931, 2021-315911, FAI-UASLP, COPOCYT (escrow 23871) and SENER-CONACYT (117373). This work was partially performed at the Center for Integrated Nanotechnologies, an Office of Science User Facility operated for the U.S. Department of Energy (DOE) Office of Science. Los Alamos National Laboratory, an affirmative action equal opportunity employer, is managed by Triad National Security, LLC for the U.S. Department of Energy's NNSA, under contract 9233218CNA000001. The authors thank the access and use of the equipment in the Laboratorio Nacional de Análisis Físicos, Químicos y Biológicos-UASLP, México. The authors thank “Investigadoras e Investigadores por México” program. Patricia Horta Fraijo and Guadalupe García Valdivieso thank CONACYT by the grant for academic postdoctoral stay. Publisher Copyright: © 2023 Wiley-VCH GmbH.
PY - 2023/3
Y1 - 2023/3
N2 - 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 (∼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.
AB - 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 (∼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.
KW - A4 zeolite
KW - Ag nanoparticles
KW - catalytic transformation
KW - microwave-assisted synthesis
KW - nitrophenol isomers
UR - http://www.scopus.com/inward/record.url?scp=85146467602&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85146467602&partnerID=8YFLogxK
U2 - https://doi.org/10.1002/cnma.202200464
DO - https://doi.org/10.1002/cnma.202200464
M3 - Article
SN - 2199-692X
VL - 9
JO - ChemNanoMat
JF - ChemNanoMat
IS - 3
M1 - e202200464
ER -