Cargando…
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...
Autores principales: | , , , , , , |
---|---|
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 |
_version_ | 1784836689339875328 |
---|---|
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. |
format | Online Article Text |
id | pubmed-9690051 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
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 |
work_keys_str_mv | AT usmanabubakarkatsina amodifiedsolgelsynthesisofanatase001tio2auhybridnanocompositesforenhancedphotodegradationoforganiccontaminants AT cursarudianaluciana amodifiedsolgelsynthesisofanatase001tio2auhybridnanocompositesforenhancedphotodegradationoforganiccontaminants AT branoiugheorghe amodifiedsolgelsynthesisofanatase001tio2auhybridnanocompositesforenhancedphotodegradationoforganiccontaminants AT somoghiraluca amodifiedsolgelsynthesisofanatase001tio2auhybridnanocompositesforenhancedphotodegradationoforganiccontaminants AT mantaanamaria amodifiedsolgelsynthesisofanatase001tio2auhybridnanocompositesforenhancedphotodegradationoforganiccontaminants AT mateidanuta amodifiedsolgelsynthesisofanatase001tio2auhybridnanocompositesforenhancedphotodegradationoforganiccontaminants AT mihaisonia amodifiedsolgelsynthesisofanatase001tio2auhybridnanocompositesforenhancedphotodegradationoforganiccontaminants AT usmanabubakarkatsina modifiedsolgelsynthesisofanatase001tio2auhybridnanocompositesforenhancedphotodegradationoforganiccontaminants AT cursarudianaluciana modifiedsolgelsynthesisofanatase001tio2auhybridnanocompositesforenhancedphotodegradationoforganiccontaminants AT branoiugheorghe modifiedsolgelsynthesisofanatase001tio2auhybridnanocompositesforenhancedphotodegradationoforganiccontaminants AT somoghiraluca modifiedsolgelsynthesisofanatase001tio2auhybridnanocompositesforenhancedphotodegradationoforganiccontaminants AT mantaanamaria modifiedsolgelsynthesisofanatase001tio2auhybridnanocompositesforenhancedphotodegradationoforganiccontaminants AT mateidanuta modifiedsolgelsynthesisofanatase001tio2auhybridnanocompositesforenhancedphotodegradationoforganiccontaminants AT mihaisonia modifiedsolgelsynthesisofanatase001tio2auhybridnanocompositesforenhancedphotodegradationoforganiccontaminants |