Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 11, Issue 49, Pages 46197-46204Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.9b17074
Keywords
cationic organic network; Cr2O72- detection and removal; anion exchange; water decontamination
Funding
- National Natural Science Foundation of China [21702089]
- Science and Technology Project of Gansu Province, China [18JR3RM239]
- Doctoral Research Foundation of Longdong University [XYBY1702]
- Industry Support and Guidance Project of Higher Education of Gansu Province, China [2019C-08]
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Dichromate is a widespread contaminant in wastewater, threatening the health of humans and other organisms. Therefore, effective detection and removal of dichromate from water is of great significance. Herein, a tetraphenylethylene functionalized cationic organic network (CON-LDU2) was constructed via a facile quaternization reaction. CON-LDU2 was successfully integrated with both detection and removal functionalities toward dichromate. On the one hand, benefiting from the strong fluorescence, CONLDU2 was employed as a chemosensor, it could efficiently and selectively probe Cr2O72- in water with turn-off' fluorescent response. On the other hand, the cationic skeleton and free anions inside framework make CON-LDU2 an excellent adsorbent for Cr2O72-, it could capture Cr2O72- from water with rapid kinetics and high capacity. The kinetic constant for adsorption of Cr2O72- can reach up to 1.784 g mg(-1) min(-1), while the capacity is determined as 325 mg Furthermore, CON-LDU2 displayed good recyclability and can be reused for at least 5 cycles. Therefore, CON-LDU2 can serve as an ideal candidate not only in detection but also in removal of Cr2O72- in water medium.
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