Variability and improvement of optical and antimicrobial performances for CQDs/mesoporous SiO2/Ag NPs composites via in situ synthesis

To change the optical properties and improve the antibacterial performances of carbon quantum dots (CQDs) and Ag NPs, mesoporous SiO2 spheres were combined with them to form the composites. In this paper, CQDs with a uniform size of about 3.74 nm were synthesized using glucose as carbon source. Then...

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Autores principales:	Cheng Youliang, Wang Mingjie, Fang Changqing, Wei Ying, Chen Jing, Zhang Jin
Formato:	article
Lenguaje:	EN
Publicado:	De Gruyter 2021
Materias:	silver nanoparticles carbon quantum dots mesoporous silicon dioxide antimicrobial performances Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/cc7b05069087400dad6e8f1f8501ddc2
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spelling	oai:doaj.org-article:cc7b05069087400dad6e8f1f8501ddc22021-12-05T14:10:50ZVariability and improvement of optical and antimicrobial performances for CQDs/mesoporous SiO2/Ag NPs composites via in situ synthesis2191-955010.1515/gps-2021-0035https://doaj.org/article/cc7b05069087400dad6e8f1f8501ddc22021-07-01T00:00:00Zhttps://doi.org/10.1515/gps-2021-0035https://doaj.org/toc/2191-9550To change the optical properties and improve the antibacterial performances of carbon quantum dots (CQDs) and Ag NPs, mesoporous SiO2 spheres were combined with them to form the composites. In this paper, CQDs with a uniform size of about 3.74 nm were synthesized using glucose as carbon source. Then, CQDs/mesoporous SiO2/Ag NPs composites were obtained in situ under UV light irradiating by using mesoporous SiO2 and Ag NO3 as the carrier and silver resource, respectively. The diameter of CQDs/mesoporous SiO2/Ag NPs particles was in the range of 200–250 nm. With the increase in irradiating time, the red-shift in the UV-Vis spectrum for as-prepared CQDs/mesoporous SiO2/Ag NPs composites was found, and the adsorption peak was widened. In addition, the composites showed a high antibacterial activity against Staphylococcus aureus and Escherichia coli via disc diffusion method. These results indicated that inhibition circles for Ag NPs/mesoporous SiO2/CQDs and mesoporous SiO2/Ag NPs were similar in diameter. Furthermore, the two composites had a better bactericidal performance compared with other particles. Therefore, as-prepared CQDs/mesoporous SiO2/Ag NPs composites in this paper have great potential applications for fluorescent materials and antibacterial materials.Cheng YouliangWang MingjieFang ChangqingWei YingChen JingZhang JinDe Gruyterarticlesilver nanoparticlescarbon quantum dotsmesoporous silicon dioxideantimicrobial performancesChemistryQD1-999ENGreen Processing and Synthesis, Vol 10, Iss 1, Pp 403-411 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	silver nanoparticles carbon quantum dots mesoporous silicon dioxide antimicrobial performances Chemistry QD1-999
spellingShingle	silver nanoparticles carbon quantum dots mesoporous silicon dioxide antimicrobial performances Chemistry QD1-999 Cheng Youliang Wang Mingjie Fang Changqing Wei Ying Chen Jing Zhang Jin Variability and improvement of optical and antimicrobial performances for CQDs/mesoporous SiO2/Ag NPs composites via in situ synthesis
description	To change the optical properties and improve the antibacterial performances of carbon quantum dots (CQDs) and Ag NPs, mesoporous SiO2 spheres were combined with them to form the composites. In this paper, CQDs with a uniform size of about 3.74 nm were synthesized using glucose as carbon source. Then, CQDs/mesoporous SiO2/Ag NPs composites were obtained in situ under UV light irradiating by using mesoporous SiO2 and Ag NO3 as the carrier and silver resource, respectively. The diameter of CQDs/mesoporous SiO2/Ag NPs particles was in the range of 200–250 nm. With the increase in irradiating time, the red-shift in the UV-Vis spectrum for as-prepared CQDs/mesoporous SiO2/Ag NPs composites was found, and the adsorption peak was widened. In addition, the composites showed a high antibacterial activity against Staphylococcus aureus and Escherichia coli via disc diffusion method. These results indicated that inhibition circles for Ag NPs/mesoporous SiO2/CQDs and mesoporous SiO2/Ag NPs were similar in diameter. Furthermore, the two composites had a better bactericidal performance compared with other particles. Therefore, as-prepared CQDs/mesoporous SiO2/Ag NPs composites in this paper have great potential applications for fluorescent materials and antibacterial materials.
format	article
author	Cheng Youliang Wang Mingjie Fang Changqing Wei Ying Chen Jing Zhang Jin
author_facet	Cheng Youliang Wang Mingjie Fang Changqing Wei Ying Chen Jing Zhang Jin
author_sort	Cheng Youliang
title	Variability and improvement of optical and antimicrobial performances for CQDs/mesoporous SiO2/Ag NPs composites via in situ synthesis
title_short	Variability and improvement of optical and antimicrobial performances for CQDs/mesoporous SiO2/Ag NPs composites via in situ synthesis
title_full	Variability and improvement of optical and antimicrobial performances for CQDs/mesoporous SiO2/Ag NPs composites via in situ synthesis
title_fullStr	Variability and improvement of optical and antimicrobial performances for CQDs/mesoporous SiO2/Ag NPs composites via in situ synthesis
title_full_unstemmed	Variability and improvement of optical and antimicrobial performances for CQDs/mesoporous SiO2/Ag NPs composites via in situ synthesis
title_sort	variability and improvement of optical and antimicrobial performances for cqds/mesoporous sio2/ag nps composites via in situ synthesis
publisher	De Gruyter
publishDate	2021
url	https://doaj.org/article/cc7b05069087400dad6e8f1f8501ddc2
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_version_	1718371690319183872

Variability and improvement of optical and antimicrobial performances for CQDs/mesoporous SiO2/Ag NPs composites via in situ synthesis

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