Javier Alonso Lopez Medina, David Domínguez, Pedro Pizá, Guoduan Liu, Camilo Velez, Faustino Reyes Gómez, Mario Humberto Farías, Uriel Caudillo-Flores, Gerardo Soto Herrera, Hugo Tiznado, Jorge Ricardo Mejía-Salazar
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The crystallite size, determined from the (311) peak, was 36.5 nm; this value was consistent with the average size of 33.2 nm measured by transmission electron microscopy (TEM). Magnetic characterization via vibrating sample magnetometry (VSM) at room temperature revealed a superparamagnetic behavior, determined by a very small hysteresis loop. The ZnO coating, achieved with 200 ALD cycles, resulted in a degradation efficiency η<sub>eff</sub> of approximately 60% for the Red Amaranth dye. Finite-difference time-domain (FDTD) simulations provided theoretical insights into the electromagnetic interactions driving the photodegradation process, supporting the UV-vis absorbance data of the AZO dye. This nanocomposite can be considered as a soft magnetic material that offers promising applications in nanotechnology for environmentally friendly wastewater treatment and remediation.</p>","PeriodicalId":22,"journal":{"name":"ACS Omega","volume":"10 17","pages":"17595-17610"},"PeriodicalIF":4.3000,"publicationDate":"2025-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12059902/pdf/","citationCount":"0","resultStr":"{\"title\":\"Magnetic Photocatalyst Nanocomposite Based on MnFe<sub>2</sub>O<sub>4</sub>@ZnO for AZO Dye Degradation.\",\"authors\":\"Javier Alonso Lopez Medina, David Domínguez, Pedro Pizá, Guoduan Liu, Camilo Velez, Faustino Reyes Gómez, Mario Humberto Farías, Uriel Caudillo-Flores, Gerardo Soto Herrera, Hugo Tiznado, Jorge Ricardo Mejía-Salazar\",\"doi\":\"10.1021/acsomega.4c11468\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>This work focuses on fabricating a photocatalyst nanocomposite based on MnFe<sub>2</sub>O<sub>4</sub>@ZnO for degrading Red Amaranth azo dye. Manganese ferrite (MnFe<sub>2</sub>O<sub>4</sub>) magnetic nanoparticles were synthesized via a hydrothermal method, while a ZnO thin film, acting as the photoactive layer, was deposited on the magnetic cores using the atomic layer deposition (ALD) technique. X-ray diffraction (XRD) confirmed the spinel ferrite structure of MnFe<sub>2</sub>O<sub>4</sub> and the hexagonal wurtzite phase of ZnO. The crystallite size, determined from the (311) peak, was 36.5 nm; this value was consistent with the average size of 33.2 nm measured by transmission electron microscopy (TEM). Magnetic characterization via vibrating sample magnetometry (VSM) at room temperature revealed a superparamagnetic behavior, determined by a very small hysteresis loop. The ZnO coating, achieved with 200 ALD cycles, resulted in a degradation efficiency η<sub>eff</sub> of approximately 60% for the Red Amaranth dye. 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Magnetic Photocatalyst Nanocomposite Based on MnFe2O4@ZnO for AZO Dye Degradation.
This work focuses on fabricating a photocatalyst nanocomposite based on MnFe2O4@ZnO for degrading Red Amaranth azo dye. Manganese ferrite (MnFe2O4) magnetic nanoparticles were synthesized via a hydrothermal method, while a ZnO thin film, acting as the photoactive layer, was deposited on the magnetic cores using the atomic layer deposition (ALD) technique. X-ray diffraction (XRD) confirmed the spinel ferrite structure of MnFe2O4 and the hexagonal wurtzite phase of ZnO. The crystallite size, determined from the (311) peak, was 36.5 nm; this value was consistent with the average size of 33.2 nm measured by transmission electron microscopy (TEM). Magnetic characterization via vibrating sample magnetometry (VSM) at room temperature revealed a superparamagnetic behavior, determined by a very small hysteresis loop. The ZnO coating, achieved with 200 ALD cycles, resulted in a degradation efficiency ηeff of approximately 60% for the Red Amaranth dye. Finite-difference time-domain (FDTD) simulations provided theoretical insights into the electromagnetic interactions driving the photodegradation process, supporting the UV-vis absorbance data of the AZO dye. This nanocomposite can be considered as a soft magnetic material that offers promising applications in nanotechnology for environmentally friendly wastewater treatment and remediation.
ACS OmegaChemical Engineering-General Chemical Engineering
CiteScore
6.60
自引率
4.90%
发文量
3945
审稿时长
2.4 months
期刊介绍:
ACS Omega is an open-access global publication for scientific articles that describe new findings in chemistry and interfacing areas of science, without any perceived evaluation of immediate impact.