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Zhang L, Luo YT, Fan JQ, Xiao SJ, Zheng QQ, Liu XL, Tan QG, Sun C, Shi Q, Liang RP, Qiu JD. Efficient capture of iodine in steam and water media by hydrogen bond-driven charge transfer complexes. JOURNAL OF HAZARDOUS MATERIALS 2024; 465:133488. [PMID: 38219593 DOI: 10.1016/j.jhazmat.2024.133488] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 12/12/2023] [Accepted: 01/08/2024] [Indexed: 01/16/2024]
Abstract
Untreated radioactive iodine (129I and 131I) released from nuclear power plants poses a significant threat to humans and the environment, so the development of materials to capture iodine from water media and steam is critical. Here, we report a charge transfer complex (TCNQ-MA CTC) with abundant nitrogen atoms and π-conjugated system for adsorption of I2 vapor and I3- from aqueous solutions. Due to the synergistic binding mechanism of benzene/triazine rings and N-containing groups with iodine, special I-π and charge transfer interaction can be formed between the guest and the host, and thus efficient removal of I2 and I3- can be realized by TCNQ-MA CTC with the adsorption capacity up to 2.42 g/g and 800 mg/g, respectively. TCNQ-MA CTC can capture 92% of I3- within 2.5 min, showing extremely fast kinetics, excellent selectivity and high affinity (Kd = 5.68 × 106 mL/g). Finally, the TCNQ-MA CTC was successfully applied in the removal of iodine from seawater with the efficiency of 93.71%. This work provides new insights in the construction of charge transfer complexes and lays the foundation for its environmental applications.
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Affiliation(s)
- Li Zhang
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, China
| | - Yu-Ting Luo
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, China
| | - Jia-Qi Fan
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, China
| | - Sai-Jin Xiao
- State Key Laboratory of Nuclear Resources and Environment, East China University of Technology (ECUT), Nanchang 330013, China
| | - Qiong-Qing Zheng
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, China
| | - Xiao-Lin Liu
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, China
| | - Quan-Gen Tan
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, China
| | - Chen Sun
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, China
| | - Qiang Shi
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, China
| | - Ru-Ping Liang
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, China
| | - Jian-Ding Qiu
- School of Chemistry and Chemical Engineering, Nanchang University, Nanchang 330031, China; State Key Laboratory of Nuclear Resources and Environment, East China University of Technology (ECUT), Nanchang 330013, China.
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Chen H, Geng J, Shen J, Shi Q, Lv J, Lv Y, Song C. Synthesis and Catalytic Degradation of PEF, ENR, and CIP by g-C 3N 4/TCNQ/Eu Composite. MICROMACHINES 2023; 14:2146. [PMID: 38138315 PMCID: PMC10745507 DOI: 10.3390/mi14122146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 11/08/2023] [Accepted: 11/18/2023] [Indexed: 12/24/2023]
Abstract
By using melamine as a precursor for the copolymerization process, g-C3N4 and g-C3N4/TCNQ/Eu complexes with various amounts of doping were created. These complexes were then examined using XRD, FT-IR, SEM, TEM, XPS, PL, UV-vis, and I-T. The degradation rates of pefloxacin (PEF), enrofloxacin (ENR), and ciprofloxacin (CIP) were 91.1%, 90.8%, and 93.2% under visible light (λ > 550 nm). The photocatalytic performance of the composite was analyzed, and the best effect was obtained for CIP photocatalysis when Eu doping was 3 mg at 20 °C and pH 7. Kinetic analysis showed that there was a linear relationship between the sample and the photocatalytic time, and the degradation rate was about 5 times that of g-C3N4. The cyclic stability of the g-C3N4/TCNQ/Eu composite sample was found to be good through repeated experiments. UPLC-MS visualizes the degradation process of CIP. The extremely low stability of piperazine ring induced subsequent degradation, followed by the fracture of quinolone ring promoting the complete decomposition of CIP.
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Affiliation(s)
- Hongyue Chen
- College of Pharmacy, Jiamusi University, Jiamusi 154007, China
| | - Jianxin Geng
- College of Pharmacy, Jiamusi University, Jiamusi 154007, China
| | - Jinghui Shen
- College of Pharmacy, Jiamusi University, Jiamusi 154007, China
| | - Qi Shi
- College of Pharmacy, Jiamusi University, Jiamusi 154007, China
| | - Jingxue Lv
- College of Pharmacy, Jiamusi University, Jiamusi 154007, China
| | - Yuguang Lv
- College of Pharmacy, Jiamusi University, Jiamusi 154007, China
| | - Chaoyu Song
- College of Pharmacy, Jiamusi University, Jiamusi 154007, China
- School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
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Tang J, Fu H, Jiang X, Cheng Z, Liao Y, Pu Q, Duan M. Conjugated Cationic Pp- x Formed on g-C 3N 4 for Photocatalyzed Water Splitting. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:7668-7680. [PMID: 34126011 DOI: 10.1021/acs.langmuir.1c00594] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Polycationic Pp-x@g-C3N4 composite was synthesized through an in situ polymerization process of N-alkylpyridinium acetylenic alcohol bromide (p-x) above the surface of g-C3N4. The structure of p-0 and the Pp-x@g-C3N4 properties were checked by modern technologies. Photocatalytic tests of Pp-x@g-C3N4 in water splitting unveiled much better Pp-x@g-C3N4 hydrogen evolution activities by comparison with both g-C3N4 and Pp-0. The hydrogen production by Pp-0@g-C3N4 was 1654.5 μmol h-1 g-1, which is ∼26- and 22-fold greater in relation to what g-C3N4 and Pp-0 produced (62.7 and 75.0 μmol h-1 g-1, respectively), suggesting strong bilateral and synergistic interactions of g-C3N4 with Pp-0. Although the lengthening methylene chain in the polymers weakened the hydrogen generation ability of Pp-x@g-C3N4, the conjugated double bonds, solubilization, and dispersion of Pp-x polycationic surfactants made Pp-x@g-C3N4 superior to g-C3N4 in water splitting. Due to the readily available raw materials, a simple way of preparation (starting chemicals to p-0 to Pp-0@g-C3N4), high photocatalysis efficiency, light irritation stability, recyclable ability, and low toxicity, Pp-0@g-C3N4 is a good candidate for water splitting.
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Affiliation(s)
- Jing Tang
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, China West Normal University, Nanchong, Sichuan 637009, P. R. China
| | - Hongquan Fu
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, China West Normal University, Nanchong, Sichuan 637009, P. R. China
| | - Xiaohui Jiang
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, China West Normal University, Nanchong, Sichuan 637009, P. R. China
| | - Zhengjun Cheng
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, China West Normal University, Nanchong, Sichuan 637009, P. R. China
| | - Yunwen Liao
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, China West Normal University, Nanchong, Sichuan 637009, P. R. China
| | - Qiang Pu
- China Petroleum Engineering Company, Limited Southwest Company, Chengdu, Sichuan 610213, P. R. China
| | - Ming Duan
- State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, P. R. China
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