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A Modified Sol–Gel Synthesis of Anatase {001}-TiO(2)/Au Hybrid Nanocomposites for Enhanced Photodegradation of Organic Contaminants

A sol–gel synthesis technique was employed for the preparation of anatase phase {001}-TiO(2)/Au hybrid nanocomposites (NCs). The scalable, schematic, and cost-efficient method was successfully modified using HF and NH(4)OH capping agents. The photocatalytic activity of the as-synthesized {001}-TiO(2...

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Autores principales: Usman, Abubakar Katsina, Cursaru, Diana-Luciana, Brănoiu, Gheorghe, Şomoghi, Raluca, Manta, Ana-Maria, Matei, Dănuţa, Mihai, Sonia
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9690051/
https://www.ncbi.nlm.nih.gov/pubmed/36354637
http://dx.doi.org/10.3390/gels8110728
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author Usman, Abubakar Katsina
Cursaru, Diana-Luciana
Brănoiu, Gheorghe
Şomoghi, Raluca
Manta, Ana-Maria
Matei, Dănuţa
Mihai, Sonia
author_facet Usman, Abubakar Katsina
Cursaru, Diana-Luciana
Brănoiu, Gheorghe
Şomoghi, Raluca
Manta, Ana-Maria
Matei, Dănuţa
Mihai, Sonia
author_sort Usman, Abubakar Katsina
collection PubMed
description A sol–gel synthesis technique was employed for the preparation of anatase phase {001}-TiO(2)/Au hybrid nanocomposites (NCs). The scalable, schematic, and cost-efficient method was successfully modified using HF and NH(4)OH capping agents. The photocatalytic activity of the as-synthesized {001}-TiO(2)/Au NCs were tested over 2-cycle degradation of methylene blue (MB) dye and pharmaceutical active compounds (PhACs) of ibuprofen and naproxen under direct sunlight illumination at 35 °C and 44,000 lx. Transmission electron microscopy (TEM), high resolution transmission electron microscopy (HR-TEM), fast Fourier transform (FFT), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), energy dispersive X-ray spectroscopy (EDS), and ultraviolet–visible diffuse reflectance spectroscopy (UV–Vis DRS) were employed for the characterization of the as-prepared sample. The characterization results from the TEM, XPS, and XRD studies established both the distribution of Au colloids on the surface of TiO(2) material, and the presence of the highly crystalline structure of anatase {001}-TiO(2)/Au NCs. Photodegradation results from the visible light irradiation of MB indicate an enhanced photocatalytic performance of Au/TiO(2) NCs over TiO(2). The results from the photocatalytic activity test performed under direct sunlight exposure exhibited promising photodegradation efficiencies. In the first cycle, the sol–gel synthesized material exhibited relatively better efficiencies (91%) with the MB dye and ibuprofen, while the highest degradation efficiency for the second cycle was 79% for the MB dye. Pseudo first-order photodegradation rates from the first cycle were determined to be comparatively slower than those from the second degradation cycle.
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spelling pubmed-96900512022-11-25 A Modified Sol–Gel Synthesis of Anatase {001}-TiO(2)/Au Hybrid Nanocomposites for Enhanced Photodegradation of Organic Contaminants Usman, Abubakar Katsina Cursaru, Diana-Luciana Brănoiu, Gheorghe Şomoghi, Raluca Manta, Ana-Maria Matei, Dănuţa Mihai, Sonia Gels Article A sol–gel synthesis technique was employed for the preparation of anatase phase {001}-TiO(2)/Au hybrid nanocomposites (NCs). The scalable, schematic, and cost-efficient method was successfully modified using HF and NH(4)OH capping agents. The photocatalytic activity of the as-synthesized {001}-TiO(2)/Au NCs were tested over 2-cycle degradation of methylene blue (MB) dye and pharmaceutical active compounds (PhACs) of ibuprofen and naproxen under direct sunlight illumination at 35 °C and 44,000 lx. Transmission electron microscopy (TEM), high resolution transmission electron microscopy (HR-TEM), fast Fourier transform (FFT), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), energy dispersive X-ray spectroscopy (EDS), and ultraviolet–visible diffuse reflectance spectroscopy (UV–Vis DRS) were employed for the characterization of the as-prepared sample. The characterization results from the TEM, XPS, and XRD studies established both the distribution of Au colloids on the surface of TiO(2) material, and the presence of the highly crystalline structure of anatase {001}-TiO(2)/Au NCs. Photodegradation results from the visible light irradiation of MB indicate an enhanced photocatalytic performance of Au/TiO(2) NCs over TiO(2). The results from the photocatalytic activity test performed under direct sunlight exposure exhibited promising photodegradation efficiencies. In the first cycle, the sol–gel synthesized material exhibited relatively better efficiencies (91%) with the MB dye and ibuprofen, while the highest degradation efficiency for the second cycle was 79% for the MB dye. Pseudo first-order photodegradation rates from the first cycle were determined to be comparatively slower than those from the second degradation cycle. MDPI 2022-11-10 /pmc/articles/PMC9690051/ /pubmed/36354637 http://dx.doi.org/10.3390/gels8110728 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Usman, Abubakar Katsina
Cursaru, Diana-Luciana
Brănoiu, Gheorghe
Şomoghi, Raluca
Manta, Ana-Maria
Matei, Dănuţa
Mihai, Sonia
A Modified Sol–Gel Synthesis of Anatase {001}-TiO(2)/Au Hybrid Nanocomposites for Enhanced Photodegradation of Organic Contaminants
title A Modified Sol–Gel Synthesis of Anatase {001}-TiO(2)/Au Hybrid Nanocomposites for Enhanced Photodegradation of Organic Contaminants
title_full A Modified Sol–Gel Synthesis of Anatase {001}-TiO(2)/Au Hybrid Nanocomposites for Enhanced Photodegradation of Organic Contaminants
title_fullStr A Modified Sol–Gel Synthesis of Anatase {001}-TiO(2)/Au Hybrid Nanocomposites for Enhanced Photodegradation of Organic Contaminants
title_full_unstemmed A Modified Sol–Gel Synthesis of Anatase {001}-TiO(2)/Au Hybrid Nanocomposites for Enhanced Photodegradation of Organic Contaminants
title_short A Modified Sol–Gel Synthesis of Anatase {001}-TiO(2)/Au Hybrid Nanocomposites for Enhanced Photodegradation of Organic Contaminants
title_sort modified sol–gel synthesis of anatase {001}-tio(2)/au hybrid nanocomposites for enhanced photodegradation of organic contaminants
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9690051/
https://www.ncbi.nlm.nih.gov/pubmed/36354637
http://dx.doi.org/10.3390/gels8110728
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