dor_id: 4110268

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336.#.#.3: Artículo de Investigación

336.#.#.a: Artículo

351.#.#.6: http://jart.icat.unam.mx/index.php/jart

351.#.#.b: Journal of Applied Research and Technology

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harvesting_group: RevistasUNAM

270.1.#.p: Revistas UNAM. Dirección General de Publicaciones y Fomento Editorial, UNAM en revistas@unam.mx

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856.4.0.u: http://jart.icat.unam.mx/index.php/jart/article/view/1285/791

100.1.#.a: Arellano, Ulises; Wang, Jin An; Balcázar, Luz M.; Chen, Lifang; Salmones, José; Solís, Silvia; Asomoza, Maximiliano; González, Julio

524.#.#.a: Arellano, Ulises, et al. (2020). Ag/CeO2/SBA-15 hybrid catalysts for the elimination of E. coli in potable water system. Journal of Applied Research and Technology; Vol 18 No 5, 2020. Recuperado de https://repositorio.unam.mx/contenidos/4110268

245.1.0.a: Ag/CeO2/SBA-15 hybrid catalysts for the elimination of E. coli in potable water system

502.#.#.c: Universidad Nacional Autónoma de México

561.1.#.a: Instituto de Ciencias Aplicadas y Tecnología, UNAM

264.#.0.c: 2020

264.#.1.c: 2020-10-30

506.1.#.a: La titularidad de los derechos patrimoniales de esta obra pertenece a las instituciones editoras. Su uso se rige por una licencia Creative Commons BY 4.0 Internacional, https://creativecommons.org/licenses/by/4.0/legalcode.es, fecha de asignación de la licencia 2020-10-30, para un uso diferente consultar al responsable jurídico del repositorio por medio del correo electrónico revistas@unam.mx

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041.#.7.h: eng

520.3.#.a: Hybrid Ag/CeO2/SBA-15 mesoporous nanocatalysts were prepared and their bactericidal activity was evaluated aiming at elimination of Escherichia coli (E. coli) in the potable water system. It was found that there existed electrons transferring from Ag0 to CeO2 to form Ag+/Ag0 and Ce4+/Ce3+ couples in the heterojunction structure, which resulted from strong interaction between Ag nanoparticles (AgNPs) and highly dispersed CeO2. By increasing the Ag content from 1wt% to 3 and 5 wt% in the catalysts, the bactericidal power of Ag/CeO2/SBA-15 materials significantly enhanced in the presence of both visible and UV light, which can be explained by the increasing electrons transferring function from Ag0 to CeO2 under UV-visible light irradiation. A combination mechanism of E. coli deactivation was proposed where E. coli body may be simultaneously attacked by both AgNPs and Ag+ ions promoted by CeO2. The former may attack the cell membrane, leading to its cleavage and disruption; and the latter may be ionized and released from AgNPs to enter inside the cell, modifying its permeability and respiration, finally resulting in complete deactivation and death.

773.1.#.t: Journal of Applied Research and Technology; Vol 18 No 5 (2020)

773.1.#.o: http://jart.icat.unam.mx/index.php/jart

046.#.#.j: 2021-04-13 00:00:00.000000

022.#.#.a: ISSN electrónico: 2448-6736; ISSN: 1665-6423

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264.#.1.b: Instituto de Ciencias Aplicadas y Tecnología, UNAM

758.#.#.1: http://jart.icat.unam.mx/index.php/jart

doi: https://doi.org/10.22201/icat.24486736e.2020.18.5.1285

handle: 0087b582f54bd8e7

harvesting_date: 2021-03-08 00:00:00.0

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Artículo

Ag/CeO2/SBA-15 hybrid catalysts for the elimination of E. coli in potable water system

Arellano, Ulises; Wang, Jin An; Balcázar, Luz M.; Chen, Lifang; Salmones, José; Solís, Silvia; Asomoza, Maximiliano; González, Julio

Instituto de Ciencias Aplicadas y Tecnología, UNAM, publicado en Journal of Applied Research and Technology, y cosechado de Revistas UNAM

Licencia de uso

Procedencia del contenido

Cita

Arellano, Ulises, et al. (2020). Ag/CeO2/SBA-15 hybrid catalysts for the elimination of E. coli in potable water system. Journal of Applied Research and Technology; Vol 18 No 5, 2020. Recuperado de https://repositorio.unam.mx/contenidos/4110268

Descripción del recurso

Autor(es)
Arellano, Ulises; Wang, Jin An; Balcázar, Luz M.; Chen, Lifang; Salmones, José; Solís, Silvia; Asomoza, Maximiliano; González, Julio
Tipo
Artículo de Investigación
Área del conocimiento
Ingenierías
Título
Ag/CeO2/SBA-15 hybrid catalysts for the elimination of E. coli in potable water system
Fecha
2020-10-30
Resumen
Hybrid Ag/CeO2/SBA-15 mesoporous nanocatalysts were prepared and their bactericidal activity was evaluated aiming at elimination of Escherichia coli (E. coli) in the potable water system. It was found that there existed electrons transferring from Ag0 to CeO2 to form Ag+/Ag0 and Ce4+/Ce3+ couples in the heterojunction structure, which resulted from strong interaction between Ag nanoparticles (AgNPs) and highly dispersed CeO2. By increasing the Ag content from 1wt% to 3 and 5 wt% in the catalysts, the bactericidal power of Ag/CeO2/SBA-15 materials significantly enhanced in the presence of both visible and UV light, which can be explained by the increasing electrons transferring function from Ag0 to CeO2 under UV-visible light irradiation. A combination mechanism of E. coli deactivation was proposed where E. coli body may be simultaneously attacked by both AgNPs and Ag+ ions promoted by CeO2. The former may attack the cell membrane, leading to its cleavage and disruption; and the latter may be ionized and released from AgNPs to enter inside the cell, modifying its permeability and respiration, finally resulting in complete deactivation and death.
Idioma
eng
ISSN
ISSN electrónico: 2448-6736; ISSN: 1665-6423

Enlaces