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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| Format: | Article |
| Language: | English |
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MDPI AG
2021-11-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/13/21/3788 |
| _version_ | 1797511960428806144 |
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| 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 |
| collection | DOAJ |
| 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). |
| first_indexed | 2024-03-10T05:55:19Z |
| format | Article |
| id | doaj.art-de19cd6424394ad1ad223a42dc8d6162 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-10T05:55:19Z |
| publishDate | 2021-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-de19cd6424394ad1ad223a42dc8d61622023-11-22T21:28:44ZengMDPI AGPolymers2073-43602021-11-011321378810.3390/polym13213788Effective Adsorption and Sensitive Detection of Cr(VI) by Chitosan/Cellulose Nanocrystals Grafted with Carbon Dots Composite HydrogelHua Zeng0Zhiyuan Hu1Chang Peng2Lei Deng3Suchun Liu4College of Food Science and Technology, Hunan Agricultural University, Changsha 410128, ChinaCollege of Food Science and Technology, Hunan Agricultural University, Changsha 410128, ChinaSchool of Chemistry and Materials Science, Hunan Agricultural University, Changsha 410128, ChinaSchool of Chemistry and Materials Science, Hunan Agricultural University, Changsha 410128, ChinaCollege of Food Science and Technology, Hunan Agricultural University, Changsha 410128, ChinaDue 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).https://www.mdpi.com/2073-4360/13/21/3788chitosancellulose nanocrystalscarbon dotsadsorptionhexavalent chromium |
| spellingShingle | 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 Polymers chitosan cellulose nanocrystals carbon dots adsorption hexavalent chromium |
| title | 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_short | 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 |
| topic | chitosan cellulose nanocrystals carbon dots adsorption hexavalent chromium |
| url | https://www.mdpi.com/2073-4360/13/21/3788 |
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