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Zhu L, Lou C, Zhang X, Yang F. Hg 2+-enhanced oxidase-like activity of platinum nanoparticles immobilized on porphyrin-based porous organic polymer for the colorimetric detection and removal of Hg 2. Mikrochim Acta 2024; 191:378. [PMID: 38853206 DOI: 10.1007/s00604-024-06471-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Accepted: 05/27/2024] [Indexed: 06/11/2024]
Abstract
Porphyrin-based porous organic polymer (POP) with uniformly immobilized platinum nanoparticles (Pt NPs) were designed and synthesized, and it was demonstrated that such nanocomposites (Pt/POP) have oxidase-like activity. Surprisingly, Hg2+ significantly enhanced the oxidase-like activity of Pt/POP. The enhancement was attributed to the capture of Hg2+ by the thioether group in Pt/POP and the subsequent redox reaction of Hg2+ with Pt NPs, accelerating the electron transfer. In the presence of Hg2+, Pt/POP catalyzed the colorless 3,3',5,5'-tetramethylbenzidine (TMB) to turn blue rapidly and changed its absorbance at 652 nm. Based on this, a fast-response colorimetric sensor was constructed for the sensitive detection of Hg2+ with a linear range of 0.2-50 μM and a detection limit of 36.5 nM. Importantly, Pt/POP can be used as an adsorbent for the efficient removal of Hg2+ with a removal efficiency as high as 99.4%. This work provides a valuable strategy for colorimetric detection and efficient removal of Hg2+.
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Affiliation(s)
- Liqin Zhu
- School of Pharmaceutical Sciences, School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250000, Shandong, China
| | - Congcong Lou
- School of Pharmaceutical Sciences, School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250000, Shandong, China
| | - Xiaomei Zhang
- School of Pharmaceutical Sciences, School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250000, Shandong, China
| | - Fei Yang
- School of Pharmaceutical Sciences, School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250000, Shandong, China.
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Yang S, Zhi K, Zhang Z, Kerem R, Hong Q, Zhao L, Wu W, Wang L, Wang D. Nitrogen-Rich Triazine-Based Covalent Organic Frameworks as Efficient Visible Light Photocatalysts for Hydrogen Peroxide Production. NANOMATERIALS (BASEL, SWITZERLAND) 2024; 14:643. [PMID: 38607177 PMCID: PMC11013763 DOI: 10.3390/nano14070643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2024] [Revised: 04/05/2024] [Accepted: 04/06/2024] [Indexed: 04/13/2024]
Abstract
Covalent organic frameworks (COFs) have been widely used in photocatalytic hydrogen peroxide (H2O2) production due to their favorable band structure and excellent light absorption. Due to the rapid recombination rate of charge carriers, however, their applications are mainly restricted. This study presents the design and development of two highly conjugated triazine-based COFs (TBP-COF and TTP-COF) and evaluates their photocatalytic H2O2 production performance. The nitrogen-rich structures and high degrees of conjugation of TBP-COF and TTP-COF facilitate improved light absorption, promote O2 adsorption, enhance their redox power, and enable the efficient separation and transfer of photogenerated charge carriers. There is thus an increase in the photocatalytic activity for the production of H2O2. When exposed to 10 W LED visible light irradiation at a wavelength of 420 nm, the pyridine-based TTP-COF produced 4244 μmol h-1 g-1 of H2O2 from pure water in the absence of a sacrificial agent. Compared to TBP-COF (1882 μmol h-1 g-1), which has a similar structure but lacks pyridine sites, TTP-COF demonstrated nearly 2.5 times greater efficiency. Furthermore, it exhibited superior performance compared to most previously published nonmetal COF-based photocatalysts.
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Affiliation(s)
- Shu Yang
- College of Chemistry, Xinjiang University, Urumqi 830017, China; (S.Y.); (Z.Z.); (R.K.); (Q.H.); (L.Z.); (W.W.)
- State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, Urumqi 830017, China
| | - Keke Zhi
- College of Engineering, China University of Petroleum—Beijing at Karamay, Karamay 834000, China;
- State Key Laboratory of Heavy Oil Processing—Karamay Branch, Karamay 834000, China
| | - Zhimin Zhang
- College of Chemistry, Xinjiang University, Urumqi 830017, China; (S.Y.); (Z.Z.); (R.K.); (Q.H.); (L.Z.); (W.W.)
- State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, Urumqi 830017, China
| | - Rukiya Kerem
- College of Chemistry, Xinjiang University, Urumqi 830017, China; (S.Y.); (Z.Z.); (R.K.); (Q.H.); (L.Z.); (W.W.)
- State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, Urumqi 830017, China
| | - Qiong Hong
- College of Chemistry, Xinjiang University, Urumqi 830017, China; (S.Y.); (Z.Z.); (R.K.); (Q.H.); (L.Z.); (W.W.)
- State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, Urumqi 830017, China
| | - Lei Zhao
- College of Chemistry, Xinjiang University, Urumqi 830017, China; (S.Y.); (Z.Z.); (R.K.); (Q.H.); (L.Z.); (W.W.)
- State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, Urumqi 830017, China
| | - Wenbo Wu
- College of Chemistry, Xinjiang University, Urumqi 830017, China; (S.Y.); (Z.Z.); (R.K.); (Q.H.); (L.Z.); (W.W.)
| | - Lulu Wang
- College of Chemistry, Xinjiang University, Urumqi 830017, China; (S.Y.); (Z.Z.); (R.K.); (Q.H.); (L.Z.); (W.W.)
- State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, Urumqi 830017, China
| | - Duozhi Wang
- College of Chemistry, Xinjiang University, Urumqi 830017, China; (S.Y.); (Z.Z.); (R.K.); (Q.H.); (L.Z.); (W.W.)
- State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, Urumqi 830017, China
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Guo X, Yao W, Bai S, Xiao J, Wei Y, Wang L, Yang J. A graphitic C 3N 4 nanocomposite-based fluorescence platform for label-free analysis of trace mercury ions. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2024; 16:930-938. [PMID: 38258552 DOI: 10.1039/d3ay01880f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2024]
Abstract
In this study, a nanocomposite consisting of graphitic carbon nitride nanosheets loaded with graphitic carbon nitride quantum dots (CNQDs/CNNNs) was synthesized via a one-step pyrolysis method. This nanocomposite exhibited excellent thermal stability, photobleaching and salt resistance. Then a new fluorescence sensing platform based on CNQDs/CNNNs was constructed, which showed high sensitivity and selectivity towards trace mercury ions (Hg2+). By using X-ray photoelectron spectroscopy, UV-vis diffuse reflectance spectra and density functional theory, the fluorescence response mechanism was elucidated where Hg2+ could interact with CNQDs/CNNNs, causing a structural change in the nanocomposite, further affecting its bandgap structure, and finally leading to fluorescence quenching. The linear range for detecting Hg2+ was found to be 0.025-4.0 μmol L-1, with a detection limit of 7.82 nmol L-1. This strategy provided the advantages of a rapid response and a broad detection range, making it suitable for quantitative detection of Hg2+ in environmental water.
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Affiliation(s)
- Xinrong Guo
- Dongguan Key Laboratory of Public Health Laboratory Science, School of Public Health, Guangdong Medical University, Dongguan 523808, People's Republic of China.
| | - Wen Yao
- Dongguan Key Laboratory of Public Health Laboratory Science, School of Public Health, Guangdong Medical University, Dongguan 523808, People's Republic of China.
| | - Silan Bai
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, People's Republic of China.
| | - Junhui Xiao
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, People's Republic of China.
| | - Yubo Wei
- School of Pharmaceutical Sciences, Yunnan Key Laboratory of Pharmacology for Natural Products, College of Modern Biomedical Industry, Kunming Medical University, People's Republic of China.
| | - Lishi Wang
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, People's Republic of China.
| | - Jie Yang
- Dongguan Key Laboratory of Public Health Laboratory Science, School of Public Health, Guangdong Medical University, Dongguan 523808, People's Republic of China.
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El-Wakeel NM, Tawfik SM, Abd-Elaal AA, Moustafa Y, Khalil MM. Chitosan-based fluorescein amphiphile macromolecular sensor for Hg2+ detection. J Mol Liq 2023. [DOI: 10.1016/j.molliq.2023.121744] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
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Peng C, Pei L, Chen S, Song Y, Wang L. A hydrazone-linked covalent organic framework with abundant N and O atoms for detecting heavy metal ions. J Electroanal Chem (Lausanne) 2023. [DOI: 10.1016/j.jelechem.2023.117307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/09/2023]
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