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Solvent Effect on the Solvothermal Synthesis of Mesoporous NiO Catalysts for Activation of Peroxymonosulfate to Degrade Organic Dyes
[Image: see text] In this work, we successfully prepared three different mesoporous NiO nanostructures with preferential (111) planes using three different solvents–water, a water–ethanol mixture, and a water–ethylene glycol mixture. The NiO nanosheets prepared from the water–ethylene glycol mixture...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical Society
2019
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6822129/ https://www.ncbi.nlm.nih.gov/pubmed/31681873 http://dx.doi.org/10.1021/acsomega.9b01883 |
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author | Gu, Yajie Sun, Shengrui Liu, Yangqiao Dong, Manjiang Yang, Qingfeng |
author_facet | Gu, Yajie Sun, Shengrui Liu, Yangqiao Dong, Manjiang Yang, Qingfeng |
author_sort | Gu, Yajie |
collection | PubMed |
description | [Image: see text] In this work, we successfully prepared three different mesoporous NiO nanostructures with preferential (111) planes using three different solvents–water, a water–ethanol mixture, and a water–ethylene glycol mixture. The NiO nanosheets prepared from the water–ethylene glycol mixture and denoted as NiO-EG showed a nanosheet morphology thinner than 10 nm, whereas the water–ethanol and water samples were 30–40 nm and above 100 nm thick, respectively. The NiO-EG catalyst was found to exhibit a high catalyzing ability to activate peroxymonosulfate (PMS) for decoloring dyes, by which 94.4% of acid orange 7 (AO7) was degraded under the following reaction conditions: AO7 = 50 mg/L, catalyst = 0.2 g/L, PMS = 0.8 g/L, pH = 7, and 30 min reaction time. The dye degradation rate was investigated as a function of the catalyst dosage, pH, and dye concentration. According to quenching experiments, it was found that SO(4)(•–), HO(•), and O(2)(•–) were the dominant radicals for AO7 degradation, and oxygen vacancies played a significant role in the generation of radicals. High surface area, thin flaky structure, rich oxygen vacancies, fast charge transport, and low diffusion impedance all enhanced the catalytic activity of NiO-EG, which exhibited the highest degradation ability due to its abundant accessible active sites for both adsorption and catalysis. |
format | Online Article Text |
id | pubmed-6822129 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | American Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-68221292019-11-01 Solvent Effect on the Solvothermal Synthesis of Mesoporous NiO Catalysts for Activation of Peroxymonosulfate to Degrade Organic Dyes Gu, Yajie Sun, Shengrui Liu, Yangqiao Dong, Manjiang Yang, Qingfeng ACS Omega [Image: see text] In this work, we successfully prepared three different mesoporous NiO nanostructures with preferential (111) planes using three different solvents–water, a water–ethanol mixture, and a water–ethylene glycol mixture. The NiO nanosheets prepared from the water–ethylene glycol mixture and denoted as NiO-EG showed a nanosheet morphology thinner than 10 nm, whereas the water–ethanol and water samples were 30–40 nm and above 100 nm thick, respectively. The NiO-EG catalyst was found to exhibit a high catalyzing ability to activate peroxymonosulfate (PMS) for decoloring dyes, by which 94.4% of acid orange 7 (AO7) was degraded under the following reaction conditions: AO7 = 50 mg/L, catalyst = 0.2 g/L, PMS = 0.8 g/L, pH = 7, and 30 min reaction time. The dye degradation rate was investigated as a function of the catalyst dosage, pH, and dye concentration. According to quenching experiments, it was found that SO(4)(•–), HO(•), and O(2)(•–) were the dominant radicals for AO7 degradation, and oxygen vacancies played a significant role in the generation of radicals. High surface area, thin flaky structure, rich oxygen vacancies, fast charge transport, and low diffusion impedance all enhanced the catalytic activity of NiO-EG, which exhibited the highest degradation ability due to its abundant accessible active sites for both adsorption and catalysis. American Chemical Society 2019-10-17 /pmc/articles/PMC6822129/ /pubmed/31681873 http://dx.doi.org/10.1021/acsomega.9b01883 Text en Copyright © 2019 American Chemical Society This is an open access article published under an ACS AuthorChoice License (http://pubs.acs.org/page/policy/authorchoice_termsofuse.html) , which permits copying and redistribution of the article or any adaptations for non-commercial purposes. |
spellingShingle | Gu, Yajie Sun, Shengrui Liu, Yangqiao Dong, Manjiang Yang, Qingfeng Solvent Effect on the Solvothermal Synthesis of Mesoporous NiO Catalysts for Activation of Peroxymonosulfate to Degrade Organic Dyes |
title | Solvent Effect on the Solvothermal Synthesis of Mesoporous
NiO Catalysts for Activation of Peroxymonosulfate to Degrade Organic
Dyes |
title_full | Solvent Effect on the Solvothermal Synthesis of Mesoporous
NiO Catalysts for Activation of Peroxymonosulfate to Degrade Organic
Dyes |
title_fullStr | Solvent Effect on the Solvothermal Synthesis of Mesoporous
NiO Catalysts for Activation of Peroxymonosulfate to Degrade Organic
Dyes |
title_full_unstemmed | Solvent Effect on the Solvothermal Synthesis of Mesoporous
NiO Catalysts for Activation of Peroxymonosulfate to Degrade Organic
Dyes |
title_short | Solvent Effect on the Solvothermal Synthesis of Mesoporous
NiO Catalysts for Activation of Peroxymonosulfate to Degrade Organic
Dyes |
title_sort | solvent effect on the solvothermal synthesis of mesoporous
nio catalysts for activation of peroxymonosulfate to degrade organic
dyes |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6822129/ https://www.ncbi.nlm.nih.gov/pubmed/31681873 http://dx.doi.org/10.1021/acsomega.9b01883 |
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