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Exploring Rapid Photocatalytic Degradation of Organic Pollutants with Porous CuO Nanosheets: Synthesis, Dye Removal, and Kinetic Studies at Room Temperature
[Image: see text] In this work, we report the facile, environmentally friendly, room-temperature (RT) synthesis of porous CuO nanosheets and their application as a photocatalyst to degrade an organic pollutant/food dye using NaBH(4) as the reducing agent in an aqueous medium. Ultrahigh-resolution fi...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical Society
2021
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7859952/ https://www.ncbi.nlm.nih.gov/pubmed/33553878 http://dx.doi.org/10.1021/acsomega.0c04747 |
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author | Nazim, Mohammed Khan, Aftab Aslam Parwaz Asiri, Abdullah M. Kim, Jae Hyun |
author_facet | Nazim, Mohammed Khan, Aftab Aslam Parwaz Asiri, Abdullah M. Kim, Jae Hyun |
author_sort | Nazim, Mohammed |
collection | PubMed |
description | [Image: see text] In this work, we report the facile, environmentally friendly, room-temperature (RT) synthesis of porous CuO nanosheets and their application as a photocatalyst to degrade an organic pollutant/food dye using NaBH(4) as the reducing agent in an aqueous medium. Ultrahigh-resolution field effect scanning electron microscopy images of CuO displayed a broken nanosheet-like (a length of ∼160 nm, a width of ∼65 nm) morphology, and the lattice strain was estimated to be ∼1.24 × 10(–3) using the Williamson–Hall analysis of X-ray diffraction plots. Owing to the strong quantum size confinement effect, CuO nanosheets resulted in an optical energy band gap of ∼1.92 eV, measured using Tauc plots of the ultraviolet–visible (UV–vis) spectrum, resulting in excellent photocatalytic efficiency. The RT synthesized CuO catalyst showed a high Brunauer–Emmet–Teller surface area of 30.88 ± 0.2313 m(2)/g (a correlation coefficient of 0.99972) with an average Barrett–Joyner–Halenda pore size of ∼20.385 nm. The obtained porous CuO nanosheets exhibited a high crystallinity of 73.5% with a crystallite size of ∼12 nm and was applied as an efficient photocatalyst for degradation of the organic pollutant/food dye, Allura Red AC (AR) dye, as monitored by UV–vis spectrophotometric analysis and evidenced by a color change from red to colorless. From UV–vis spectra, CuO nanosheets exhibited an efficient and ultrafast photocatalytic degradation efficiency of ∼96.99% for the AR dye in an aqueous medium within 6 min at RT. According to the Langmuir–Hinshelwood model, photodegradation reaction kinetics followed a pseudo-first-order reaction with a rate constant of k = 0.524 min(–1) and a half-life (t(1/2)) of 2.5 min for AR dye degradation in the aqueous medium. The CuO nanosheets showed an outstanding recycling ability for AR degradation and would be highly favorable and an efficient catalyst due to the synergistic effect of high adsorption capability and photodegradation of the food dye. |
format | Online Article Text |
id | pubmed-7859952 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | American Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-78599522021-02-05 Exploring Rapid Photocatalytic Degradation of Organic Pollutants with Porous CuO Nanosheets: Synthesis, Dye Removal, and Kinetic Studies at Room Temperature Nazim, Mohammed Khan, Aftab Aslam Parwaz Asiri, Abdullah M. Kim, Jae Hyun ACS Omega [Image: see text] In this work, we report the facile, environmentally friendly, room-temperature (RT) synthesis of porous CuO nanosheets and their application as a photocatalyst to degrade an organic pollutant/food dye using NaBH(4) as the reducing agent in an aqueous medium. Ultrahigh-resolution field effect scanning electron microscopy images of CuO displayed a broken nanosheet-like (a length of ∼160 nm, a width of ∼65 nm) morphology, and the lattice strain was estimated to be ∼1.24 × 10(–3) using the Williamson–Hall analysis of X-ray diffraction plots. Owing to the strong quantum size confinement effect, CuO nanosheets resulted in an optical energy band gap of ∼1.92 eV, measured using Tauc plots of the ultraviolet–visible (UV–vis) spectrum, resulting in excellent photocatalytic efficiency. The RT synthesized CuO catalyst showed a high Brunauer–Emmet–Teller surface area of 30.88 ± 0.2313 m(2)/g (a correlation coefficient of 0.99972) with an average Barrett–Joyner–Halenda pore size of ∼20.385 nm. The obtained porous CuO nanosheets exhibited a high crystallinity of 73.5% with a crystallite size of ∼12 nm and was applied as an efficient photocatalyst for degradation of the organic pollutant/food dye, Allura Red AC (AR) dye, as monitored by UV–vis spectrophotometric analysis and evidenced by a color change from red to colorless. From UV–vis spectra, CuO nanosheets exhibited an efficient and ultrafast photocatalytic degradation efficiency of ∼96.99% for the AR dye in an aqueous medium within 6 min at RT. According to the Langmuir–Hinshelwood model, photodegradation reaction kinetics followed a pseudo-first-order reaction with a rate constant of k = 0.524 min(–1) and a half-life (t(1/2)) of 2.5 min for AR dye degradation in the aqueous medium. The CuO nanosheets showed an outstanding recycling ability for AR degradation and would be highly favorable and an efficient catalyst due to the synergistic effect of high adsorption capability and photodegradation of the food dye. American Chemical Society 2021-01-20 /pmc/articles/PMC7859952/ /pubmed/33553878 http://dx.doi.org/10.1021/acsomega.0c04747 Text en © 2021 The Authors. Published by American Chemical Society This is an open access article published under a Creative Commons Non-Commercial No Derivative Works (CC-BY-NC-ND) Attribution License (http://pubs.acs.org/page/policy/authorchoice_ccbyncnd_termsofuse.html) , which permits copying and redistribution of the article, and creation of adaptations, all for non-commercial purposes. |
spellingShingle | Nazim, Mohammed Khan, Aftab Aslam Parwaz Asiri, Abdullah M. Kim, Jae Hyun Exploring Rapid Photocatalytic Degradation of Organic Pollutants with Porous CuO Nanosheets: Synthesis, Dye Removal, and Kinetic Studies at Room Temperature |
title | Exploring Rapid Photocatalytic Degradation of Organic
Pollutants with Porous CuO Nanosheets: Synthesis, Dye Removal, and
Kinetic Studies at Room Temperature |
title_full | Exploring Rapid Photocatalytic Degradation of Organic
Pollutants with Porous CuO Nanosheets: Synthesis, Dye Removal, and
Kinetic Studies at Room Temperature |
title_fullStr | Exploring Rapid Photocatalytic Degradation of Organic
Pollutants with Porous CuO Nanosheets: Synthesis, Dye Removal, and
Kinetic Studies at Room Temperature |
title_full_unstemmed | Exploring Rapid Photocatalytic Degradation of Organic
Pollutants with Porous CuO Nanosheets: Synthesis, Dye Removal, and
Kinetic Studies at Room Temperature |
title_short | Exploring Rapid Photocatalytic Degradation of Organic
Pollutants with Porous CuO Nanosheets: Synthesis, Dye Removal, and
Kinetic Studies at Room Temperature |
title_sort | exploring rapid photocatalytic degradation of organic
pollutants with porous cuo nanosheets: synthesis, dye removal, and
kinetic studies at room temperature |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7859952/ https://www.ncbi.nlm.nih.gov/pubmed/33553878 http://dx.doi.org/10.1021/acsomega.0c04747 |
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