Effective Adsorption and Sensitive Detection of Cr(VI) by Chitosan/Cellulose Nanocrystals Grafted with Carbon Dots Composite Hydrogel

Due to its lethal effect on the human body and other creatures, Cr(VI) ions have attained widespread public attention, and an effective adsorbent for removing Cr(VI) ions is vital. Chitosan (CS)/cellulose nanocrystals grafted with carbon dots (CNCD) composite hydrogel with strong sorption ability an...

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Autores principales:	Hua Zeng, Zhiyuan Hu, Chang Peng, Lei Deng, Suchun Liu
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	chitosan cellulose nanocrystals carbon dots adsorption hexavalent chromium Organic chemistry QD241-441
Acceso en línea:	https://doaj.org/article/de19cd6424394ad1ad223a42dc8d6162
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spelling	oai:doaj.org-article:de19cd6424394ad1ad223a42dc8d61622021-11-11T18:47:27ZEffective Adsorption and Sensitive Detection of Cr(VI) by Chitosan/Cellulose Nanocrystals Grafted with Carbon Dots Composite Hydrogel10.3390/polym132137882073-4360https://doaj.org/article/de19cd6424394ad1ad223a42dc8d61622021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4360/13/21/3788https://doaj.org/toc/2073-4360Due to its lethal effect on the human body and other creatures, Cr(VI) ions have attained widespread public attention, and an effective adsorbent for removing Cr(VI) ions is vital. Chitosan (CS)/cellulose nanocrystals grafted with carbon dots (CNCD) composite hydrogel with strong sorption ability and sensitive detection ability for Cr(VI) was formed. The cellulose nanocrystals (CN) offered a natural skeleton for assembling 3D porous structures, and then improved the sorption ability for Cr(VI); moreover, carbon dots (CD) acted as a fluorescent probe for Cr(VI) and provided Cr(VI) adsorption sites. With a maximum adsorption capacity of 217.8 mg/g, the CS/CNCD composite hydrogel exhibited efficient adsorption properties. Meanwhile, with a detection limit of 0.04 μg/L, this hydrogel was used for selective and quantitative detection of Cr(VI). The determination of Cr(VI) was based on the inner filter effect (IFE) and static quenching. This hydrogel retained its effective adsorption ability even after four repeated regenerations. Furthermore, the economic feasibility of the CS/CNCD composite hydrogel over activated carbon was confirmed using cost analysis. This study provided one new method for producing low-cost adsorbents with effective sorption and sensitive detection for Cr(VI).Hua ZengZhiyuan HuChang PengLei DengSuchun LiuMDPI AGarticlechitosancellulose nanocrystalscarbon dotsadsorptionhexavalent chromiumOrganic chemistryQD241-441ENPolymers, Vol 13, Iss 3788, p 3788 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	chitosan cellulose nanocrystals carbon dots adsorption hexavalent chromium Organic chemistry QD241-441
spellingShingle	chitosan cellulose nanocrystals carbon dots adsorption hexavalent chromium Organic chemistry QD241-441 Hua Zeng Zhiyuan Hu Chang Peng Lei Deng Suchun Liu Effective Adsorption and Sensitive Detection of Cr(VI) by Chitosan/Cellulose Nanocrystals Grafted with Carbon Dots Composite Hydrogel
description	Due to its lethal effect on the human body and other creatures, Cr(VI) ions have attained widespread public attention, and an effective adsorbent for removing Cr(VI) ions is vital. Chitosan (CS)/cellulose nanocrystals grafted with carbon dots (CNCD) composite hydrogel with strong sorption ability and sensitive detection ability for Cr(VI) was formed. The cellulose nanocrystals (CN) offered a natural skeleton for assembling 3D porous structures, and then improved the sorption ability for Cr(VI); moreover, carbon dots (CD) acted as a fluorescent probe for Cr(VI) and provided Cr(VI) adsorption sites. With a maximum adsorption capacity of 217.8 mg/g, the CS/CNCD composite hydrogel exhibited efficient adsorption properties. Meanwhile, with a detection limit of 0.04 μg/L, this hydrogel was used for selective and quantitative detection of Cr(VI). The determination of Cr(VI) was based on the inner filter effect (IFE) and static quenching. This hydrogel retained its effective adsorption ability even after four repeated regenerations. Furthermore, the economic feasibility of the CS/CNCD composite hydrogel over activated carbon was confirmed using cost analysis. This study provided one new method for producing low-cost adsorbents with effective sorption and sensitive detection for Cr(VI).
format	article
author	Hua Zeng Zhiyuan Hu Chang Peng Lei Deng Suchun Liu
author_facet	Hua Zeng Zhiyuan Hu Chang Peng Lei Deng Suchun Liu
author_sort	Hua Zeng
title	Effective Adsorption and Sensitive Detection of Cr(VI) by Chitosan/Cellulose Nanocrystals Grafted with Carbon Dots Composite Hydrogel
title_short	Effective Adsorption and Sensitive Detection of Cr(VI) by Chitosan/Cellulose Nanocrystals Grafted with Carbon Dots Composite Hydrogel
title_full	Effective Adsorption and Sensitive Detection of Cr(VI) by Chitosan/Cellulose Nanocrystals Grafted with Carbon Dots Composite Hydrogel
title_fullStr	Effective Adsorption and Sensitive Detection of Cr(VI) by Chitosan/Cellulose Nanocrystals Grafted with Carbon Dots Composite Hydrogel
title_full_unstemmed	Effective Adsorption and Sensitive Detection of Cr(VI) by Chitosan/Cellulose Nanocrystals Grafted with Carbon Dots Composite Hydrogel
title_sort	effective adsorption and sensitive detection of cr(vi) by chitosan/cellulose nanocrystals grafted with carbon dots composite hydrogel
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/de19cd6424394ad1ad223a42dc8d6162
work_keys_str_mv	AT huazeng effectiveadsorptionandsensitivedetectionofcrvibychitosancellulosenanocrystalsgraftedwithcarbondotscompositehydrogel AT zhiyuanhu effectiveadsorptionandsensitivedetectionofcrvibychitosancellulosenanocrystalsgraftedwithcarbondotscompositehydrogel AT changpeng effectiveadsorptionandsensitivedetectionofcrvibychitosancellulosenanocrystalsgraftedwithcarbondotscompositehydrogel AT leideng effectiveadsorptionandsensitivedetectionofcrvibychitosancellulosenanocrystalsgraftedwithcarbondotscompositehydrogel AT suchunliu effectiveadsorptionandsensitivedetectionofcrvibychitosancellulosenanocrystalsgraftedwithcarbondotscompositehydrogel
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Effective Adsorption and Sensitive Detection of Cr(VI) by Chitosan/Cellulose Nanocrystals Grafted with Carbon Dots Composite Hydrogel

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