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CQDs/ZnO composites based on waste rice noodles: preparation and photocatalytic capability

To provide a low-cost photocatalyst and new methodology for the utilization of waste rice noodle (WRN), a carbon quantum dots/zinc oxide (CQDs/ZnO) composite using WRN as the raw material was synthesized and characterized. The CQDs/ZnO composite based on WRN exhibited a highly efficient photocatalyt...

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Autores principales: Jin, Xin-Yan, Ying, Wan-Ying, Che, Rui-Jie, Xiao, Ping, Zhou, Yu-Qing, Liu, Yan, Liu, Meng-Yu, Chen, Shuo-Ping
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9390721/
https://www.ncbi.nlm.nih.gov/pubmed/36090407
http://dx.doi.org/10.1039/d2ra03709b
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author Jin, Xin-Yan
Ying, Wan-Ying
Che, Rui-Jie
Xiao, Ping
Zhou, Yu-Qing
Liu, Yan
Liu, Meng-Yu
Chen, Shuo-Ping
author_facet Jin, Xin-Yan
Ying, Wan-Ying
Che, Rui-Jie
Xiao, Ping
Zhou, Yu-Qing
Liu, Yan
Liu, Meng-Yu
Chen, Shuo-Ping
author_sort Jin, Xin-Yan
collection PubMed
description To provide a low-cost photocatalyst and new methodology for the utilization of waste rice noodle (WRN), a carbon quantum dots/zinc oxide (CQDs/ZnO) composite using WRN as the raw material was synthesized and characterized. The CQDs/ZnO composite based on WRN exhibited a highly efficient photocatalytic degradation effect on various organic pollutants and could be a good alternative for commercial ZnO. For methylene blue, the CQDs/ZnO composite showed a good degradation rate of 99.58% within 40 min, a high degradation rate constant of 0.2630 min(−1), and could be recycled and reused for ten photocatalytic cycles without an appreciable decrease in the degradation effect, which was much better than that of commercial ZnO. The resulting CQDs/ZnO composite also displayed a nice photocatalytic degradation effect on other common organic pollutants, such as malachite green, methyl violet, basic fuchsin, rhodamine B, aniline and tetracycline. In particular, it could achieve excellent photocatalytic degradation on malachite green with an extremely high degradation rate constant of 1.9260 min(−1). Besides, the CQDs/ZnO composite could also be used to control the pollution of tetracycline or aniline. The introduction of CQDs based on WRN to ZnO resulted in efficient electron–hole pair separation and enabled more photogenerated electrons to reduce O(2) and more photogenerated holes to oxidize H(2)O, which caused stronger abilities in producing radicals (such as O(2)˙(−) and ˙OH) and a better photocatalytic degradation effect to organic pollutants.
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spelling pubmed-93907212022-09-08 CQDs/ZnO composites based on waste rice noodles: preparation and photocatalytic capability Jin, Xin-Yan Ying, Wan-Ying Che, Rui-Jie Xiao, Ping Zhou, Yu-Qing Liu, Yan Liu, Meng-Yu Chen, Shuo-Ping RSC Adv Chemistry To provide a low-cost photocatalyst and new methodology for the utilization of waste rice noodle (WRN), a carbon quantum dots/zinc oxide (CQDs/ZnO) composite using WRN as the raw material was synthesized and characterized. The CQDs/ZnO composite based on WRN exhibited a highly efficient photocatalytic degradation effect on various organic pollutants and could be a good alternative for commercial ZnO. For methylene blue, the CQDs/ZnO composite showed a good degradation rate of 99.58% within 40 min, a high degradation rate constant of 0.2630 min(−1), and could be recycled and reused for ten photocatalytic cycles without an appreciable decrease in the degradation effect, which was much better than that of commercial ZnO. The resulting CQDs/ZnO composite also displayed a nice photocatalytic degradation effect on other common organic pollutants, such as malachite green, methyl violet, basic fuchsin, rhodamine B, aniline and tetracycline. In particular, it could achieve excellent photocatalytic degradation on malachite green with an extremely high degradation rate constant of 1.9260 min(−1). Besides, the CQDs/ZnO composite could also be used to control the pollution of tetracycline or aniline. The introduction of CQDs based on WRN to ZnO resulted in efficient electron–hole pair separation and enabled more photogenerated electrons to reduce O(2) and more photogenerated holes to oxidize H(2)O, which caused stronger abilities in producing radicals (such as O(2)˙(−) and ˙OH) and a better photocatalytic degradation effect to organic pollutants. The Royal Society of Chemistry 2022-08-19 /pmc/articles/PMC9390721/ /pubmed/36090407 http://dx.doi.org/10.1039/d2ra03709b Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/
spellingShingle Chemistry
Jin, Xin-Yan
Ying, Wan-Ying
Che, Rui-Jie
Xiao, Ping
Zhou, Yu-Qing
Liu, Yan
Liu, Meng-Yu
Chen, Shuo-Ping
CQDs/ZnO composites based on waste rice noodles: preparation and photocatalytic capability
title CQDs/ZnO composites based on waste rice noodles: preparation and photocatalytic capability
title_full CQDs/ZnO composites based on waste rice noodles: preparation and photocatalytic capability
title_fullStr CQDs/ZnO composites based on waste rice noodles: preparation and photocatalytic capability
title_full_unstemmed CQDs/ZnO composites based on waste rice noodles: preparation and photocatalytic capability
title_short CQDs/ZnO composites based on waste rice noodles: preparation and photocatalytic capability
title_sort cqds/zno composites based on waste rice noodles: preparation and photocatalytic capability
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9390721/
https://www.ncbi.nlm.nih.gov/pubmed/36090407
http://dx.doi.org/10.1039/d2ra03709b
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