JOURNAL OF CHROMATOGRAPHY A
·
2025
·
IF 4
Chenhuan Wang,Qianqian Wang,Kaiyuan Si
The extensive presence of phenolic organic contaminants (POCs) poses a serious threat to humans. Meanwhile, the upcycling/reusing of waste polystyrene to reduce the exponential growth of plastic pollution is a very important environmental issue. Addressing these demands, a series of carboxyl-functional hypercrosslinked polymers (labeled PP-HCPs) were constructed by knitting waste polystyrene with pyromellitic dianhydride at different ratios through a one-step Friedel-Crafts reaction for effective adsorption of POCs. Among the prepared PP-HCPs, PP-HCP2 displayed a large specific surface area with high adsorption capacity (37.3 mg g −1 ) for POCs. Using PP-HCP2 as solid phase extraction sorbent, six POCs were effectively extracted from water and peach drink samples, then subjected to high-performance liquid chromatography-ultraviolet detection. The method demonstrated good linearity in the range of 0.03–100.0 ng mL −1 for water samples and 0.06–100.0 ng mL −1 for peach drinks under optimum experimental conditions. At a signal-to-noise ratio of 3, low detection limits were found to be 0.01–0.10 ng mL −1 for water samples and 0.02–0.15 ng mL −1 for peach drinks. Good accuracy and repeatability were achieved with recoveries of 85.3–111.8 % and the relative standard deviations below 8.6 %. The PP-HCP2-based approach can be employed as a dependable and sensitive tool to detect POCs in water and peach drink samples. This work delivers a simple and economically viable approach to fabricate carboxyl-functional HCPs by converting waste foam into high-value-added sorbent, with great significance for sustainable development.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2018
·Vol. 23
·期 1
·187-194
·
IF 2.509
Li Yancai,Li Yuhui,Zhang Yingzhen,Song Yingying,Jiang Yingying
In this work, carboxyl-functionalized graphene (CFG) was immobilized on glassy carbon electrode (GCE) by self-assembled monolayers (SAMs) based on covalent interaction with ethylenediamine as an arm linker. The obtained (CFG-NHCH 2 CH 2 NH)/GCE can be used as rapid and sensitive electrochemical sensor for hydroxyl free radicals (•OH). In the process of determination, the concentration of •OH was acquired not directly but through the only captured product 3,4-dihydroxybenzoic acid (3,4-DHBA), which is adopting 4-hydroxybenzoic acid (4-HBA) as the •OH trap. The glassy carbon electrode modified with carboxyl-functionalized graphene exhibits well conductivity and electron transfer ability, and also displays good electrocatalytic activity towards the electrochemical redox of 3,4-DHBA. The proposed sensor displays a good linear range from 1.0 to 450.0 μM for 3,4-DHBA with a low detection limit of 0.17 μM (S/ N = 3). More importantly, the sensing platform can be successfully applied for •OH detection with the 4-HBA as the •OH trap.
研究领域:
分析化学
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电化学
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产品关联
DOI
高影响因子
ACS Applied Nano Materials
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2019
·
IF 0
Yang Li,Cheng-Xiong Yang,Hai-Long Qian,Xu Zhao,Xiu-Ping Yan
The introduction of a functional moiety into a covalent organic framework (COF) is of great significance in promoting its wide applications. Here we show the one-pot synthesis of carboxyl-functionalized COF-TzDBd via the direct condensation of 1,3,5-tris(4-formyl-phenyl) triazine (Tz) and 4,4′-diamino-[1,1′-biphenyl]-2,2′-dicarboxylic acid (DBd). The prepared TzDBd showed good crystallinity, mesoporous pores, and high chemical stability. It was applied for ultrafast adsorption and the efficient elimination of triphenylmethane dyes. The adsorption isotherms, adsorption thermodynamics, kinetics, and reusability of the prepared carboxyl-COF were investigated in detail. The adsorption of crystal violet (CV) and brilliant green (BG) on TzDBd followed the pseudo-second-order adsorption kinetic model and reached equilibrium within 2 min at the initial concentration of 100 mg L–1. The adsorption of triphenylmethane dyes on TzDBd fit well with the Langmuir adsorption model and gave the maximum adsorption capacities of 307.7 and 276.1 mg g–1 for CV and BG, respectively. The predesigned mesoporous pores, conjugated phenyl structure, and negatively charged carboxyl groups on TzDBd significantly facilitate the adsorption kinetics for large cationic triphenylmethane dyes. The ultrafast kinetics, high adsorption capacity, and good reusability endow the carboxyl-functionalized COF with great potential for removing triphenylmethane dyes from an aqueous environment.
研究领域:
环境科学
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材料科学
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产品关联
DOI
RSC Advances
·
2017
·Vol. 7
·期 82
·51993-52000
·
IF 3.108
Shushan Hou,Xiaoju Li,Hongli Wang,Minggang Wang,Ying Zhang,Yue Chi,Zhankui Zhao
In this work, we report the fabrication of novel multifunctional microspheres which are composed of ordered mesoporous silica shells with accessible carboxyl functionalized surfaces and radially oriented large mesopores, and nonporous silica-coated magnetite cores (Fe3O4), aiming to remove heavy metal ions from aqueous media. The well-designed multifunctional microspheres were thoroughly characterized with transmission electron microscopy, scanning electron microscopy, infrared spectroscopy, N2 adsorption–desorption, X-ray diffraction as well as magnetization measurements. The as-prepared microspheres possess unique properties including stably grafted and accessible carboxyl groups, highly open mesopores (11.03 nm), high magnetization (34.5 emu g−1), and large BET surface areas (165 m2 g−1), and as a result, the as-prepared microspheres exhibit an enhanced performance for the removal of Cd(II), Cu(II), and Pb(II) from wastewater, with a high adsorption capacity, a rapid adsorption rate, and an easy magnetically separable process.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
·
2019
·Vol. 34
·期 4
·973-978
·
IF 0.605
Wang Wanxia,Wang Youyun,Wang Yu,Zhu Hongda,Sun Honghao,Liu Mingxing
Fluorescent mesoporous silica nanoparticles functionalized with carboxyl group (Znq-CMS-COOH) were successfully synthesized by in situ formation route of 8-hydroxyquinolinate zinc complexes in channels of mesoporous silica nanoparticles and post-grafting of carboxyl group on the surface. Moreover, the particle size and structural properties of Znq-CMS-COOH were characterized by transmission electron microscopy (TEM), field emission scanning electron microscopy (FE-SEM), dynamic light scattering (DLS). Fourier transform infrared spectroscopy (FT-IR), UV-vis spectrometer, fluorescence spectrometer and nitrogen adsorption-desorption measurements. The obtained results suggest that the Znq-CMS-COOH presents the uniform spherical shape with the mean diameter of about 85 nm and the obvious wormhole arrangement mesoporous. In addition, the Znq-CMS-COOH possesses green fluorescence with the emission peaks at 495 nm. So the Znq-CMS-COOH, which is beneficial to further modification and tracing, might be a great potential carrier for applying in drug delivery system in the future.
研究领域:
材料科学
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生物医学工程
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纳米技术
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DOI
高影响因子
Silicon
·
2019
·Vol. 11
·期 3
·1261-1266
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IF 1.21
Guo Ruibin,Qi Lei,Mo Zunli,Zhang Hongjuan,Feng Hangkong,Yang Shengrong
In this work, two different methods were applied to prepare SiO 2 -Graphene composite materials (SiO 2 -G). One way to synthesize composite materials was stirred carboxyl functionalized graphene and tetraethyl ortho silicate (TEOS) together at low temperature. In other way, SiO 2 -G were obtained via an one-pot hydrothermal reaction. We employed SEM to characterize the direct structure and morphology information of materials, subsequently. It could be clearly observed that their morphology were greatly affected by the different preparation methods and resulted in a tremendous change occurred. It is no question that the as-prepared materials with different structure can be used as different substrate materials.
研究领域:
材料科学
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纳米科技
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复合材料
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表面化学
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功能材料
✓ 已验证
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Ming Zhou,Yong Xu,Rong Zhong,Yurong Wang
A glassy carbon electrode modified by carboxyl-functionalized reduced graphene oxide (ERGO-COOH/GCE) was developed by electrochemical deposition method. The electrochemical behavior of caffeic acid (CA) on the ERGO-COOH/GCE was studied, and an electroanalytical method for the detection of CA in tablets was established. The effects of the modification parameters, the pH of the buffer solution and the scanning rate on the electrochemical behavior of CA were investigated by cyclic voltammetry (CV). The results revealed that modifying the GCE by electrochemical deposition facilitated a more sensitive response to CA on the modified electrode than modifying it by drop coating. The peak current of CA on the ERGO-COOH/GCE was significantly higher than that on the bare glassy carbon electrode (GCE) over five scan cycles, and the optimized the concentration of GO-COOH, the scanning cycles, and the pH were 4 mg·mL -1 , 5 cycles, and 2.0, respectively. The redox reaction of CA on the modified electrode was a quasi-reversible process controlled by adsorption and involved the transfer of two electrons and two protons. The ERGO-COOH/GCE showed a linear response to CA in the range of 0.05 ~ 20 μM with a limit of detection of 8 nM ( S/N =3). The modified electrode exhibited good repeatability and reproducibility and anti-interference performance. The ERGO-COOH/GCE was applied to the detection of CA in caffeic acid tablets with a recovery of 97.7% ~ 108%.
研究领域:
分析化学
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电化学
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生物传感
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药物分析
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纳米材料
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电分析化学
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药剂学
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2019
·
IF 3.375
Xiao-Fan Lu,Wen-Hua Ji,Lin Yuan,Shui Yu,Dian-Shun Guo
A carboxy-functionalized covalent organic framework COOH@COF for efficient removal of Pb2+ and Hg2+ ions from water has been prepared. Fourier transform infrared spectroscopy, solid-state 13C NMR spectra, and elemental analysis indicate that the carboxy function has been grafted to COF materials via the click reaction. Its crystallinity remains unchanged after post-synthetic modification, as confirmed by the powder X-ray diffraction. Scanning electron microscopy images reveal that the COOH@COF possesses the thorn ball structure assembled by numerous nanowires with a diameter of 90 nm. This COOH@COF features excellent adsorption capacities for Pb2+ (123.8) and Hg2+ (99.1 mg/g) in water. The adsorption isotherms follow the Langmuir model, and their kinetics adsorption fits the pseudo-second-order model. Particularly, the COOH@COF can be recycled 20 times without loss of the adsorption capacity in water, showing its latent potential for practical application in the future.
研究领域:
环境科学
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材料科学
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水处理
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产品关联
DOI
高影响因子
Desalination and Water Treatment
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2024
·
IF 1
Xiaomei Wang,Xiaomi Yuan,Fa Zhou,Jianhan Huang
Functionalized hyper-cross-linked polymers with special functional groups are anticipated for fast and efficient removal of aniline from aqueous solution. Herein, sequential four chemical reactions namely polymerization, Friedel–Crafts reaction, amination reaction, and carboxylation reaction were performed and carboxyl functionalized hyper-cross-linked dendrimers with highly branched structure and multiple functional groups were fabricated. The introduced carboxyl, amino, and amido groups on the polymers exhibit strong affinity to aniline through acid-base interaction, electrostatic interaction, and hydrogen bonding, which are helpful for the equilibrium adsorption of aniline. Importantly, these polymers owned hierarchical microporous and mesoporous structure, which is beneficial for the fast adsorption of aniline. These polymers were efficient for aniline adsorption with a maximum capacity of 163.0 mg/g and the adsorption was an exothermic, spontaneous, and ordered process. The adsorption was a fast process and less than 10 min was required to reach the equilibrium. The present study gives a simple strategy for the synthesis of carboxyl functionalized hyper-cross-linked dendrimers, which is of great significance for the fast and efficient adsorption of aniline from aqueous solution.
研究领域:
环境化学
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高分子科学
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吸附分离
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功能材料
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水处理技术
✓ 已验证
DOI
高影响因子
Science China-Chemistry
·
2019
·Vol. 62
·期 7
·889-896
·
IF 6.085
Wang Zhaolei,Jiang Xue,Liu Wenbin,Lu Guolin,Huang Xiaoyu
A new kind of bifunctional magnetic-fluorescent nanoparticles (NPs) with abundant carboxyls on the surface has been prepared by covalently combining glutathiose (GSH)-modified CdTe quantum dots (QDs) with Fe 3 O 4 @SiO 2 NPs. The silica-coated Fe 3 O 4 NPs were functionalized with amino groups by (3-aminopropyl)triethoxysilane to provide Fe 3 O 4 @SiO 2 -NH 2 NPs, which was then chemically conjugated with GSH-modified CdTe QDs to form bifunctional magnetic-fluorescent NPs, Fe 3 O 4 @SiO 2 -NH-CO-CdTe-QDs NPs. The properties and morphologies of Fe 3 O 4 @SiO 2 -NH-CO-CdTe-QDs NPs were investigated by FTIR, Xray diffraction, transmission electron microscopy (TEM), absorption and fluorescence spectroscopy and vibrating sample magnetometry. TEM images display that Fe 3 O 4 @SiO 2 -NH-CO-CdTe-QDs NPs possess spherical core-shell structure with a uniform size about 50 nm. The bifunctional NPs were found to exhibit good magnetic and strong fluorescent properties favorable for their application in the detection of latent fingerprints. Furthermore, the carboxyls on the surface of NPs have good absorptions with water in air and the residues of fingerprints so as to not only avoid dust flying to protect the health of operators, but also improve the efficiency of detection.
研究领域:
纳米生物技术
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法医科学
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分析化学
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材料科学
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分子影像
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表面功能化
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DOI
高影响因子
ACS Omega
·
2019
·
IF 2.584
Jue Zhang,Zhoujun Wang,Chao He,Xiaoling Liu,Weifeng Zhao,Shudong Sun,Changsheng Zhao
Urea is one of the uremic toxins threating people’s health. Herein, we prepared a kind of urease-immobilized beads to remove urea, which exhibited good hemocompatibility and high removal efficiency. Urease was covalently grafted onto carboxyl-group-functionalized polyethersulfone beads, which were previously prepared by in situ cross-linking polymerization and phase inversion methods. The urease-immobilized beads had sufficient blood compatibility with low protein adsorption amount, undiminished clotting times, low hemolysis ratio, and suppressed complement activation and contact activation. Furthermore, the urease-immobilized beads showed good urea removal ability with a urea removal amount of 75.1 mg/g after incubating in 80 mg/dL urea solution for 480 min. In addition, the prepared urease-immobilized beads could maintain urea removal activity after being used for five cycles and showed satisfied activity even when stored for 15 days in phosphate buffer saline solution. Thus, the urease-immobilized beads may meet the potential application demand for safe and effective blood detoxification.
研究领域:
生物医学工程
·
血液透析
·
毒理学
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产品关联
DOI
高影响因子
CELLULOSE
·
2020
·Vol. 27
·期 17
·10167-10181
·
IF 4.21
Guo Wanghuan,Zhao Zhigang,Yang Fan,Xie Meiying,Shao Zhiheng,Xue Liyan,Zhang Yang,Lin Wanqing,Du Chang,Zhang Yongjian
Abstract The separation and recovery of Au(III), Pd(II), and Pt(IV) is a challenge in hydrometallurgy, and finding good adsorbents is a way to solve this problem. In this work, two novel adsorbents, carboxymethyldiethylammoniumethyl cellulose (CM-n-DEAEC) and carboxymethyl-2-diethylaminoethyl cellulose (CM-o-DEAEC), were synthesized by changing the grafting site of carboxymethyl on diethylaminoethyl cellulose (DEAEC). The structures and morphologies of the adsorbents were examined by NMR, FT-IR, EA, TGA, and SEM analyses. The effects of adsorbents on the separation performance of Au(III), Pd(II), and Pt(IV) at different adsorption conditions were studied. The performances of stripping and recycling were investigated. At a 3 M chloride ion concentration, CM-n-DEAEC's adsorption rates for Pd(II), Au(III), and Pt(IV) were stabilized at 60%, 30%, and 7% in the pH range of 1.0–3.0 and were unaffected by coexisting metal ions. However, at a 0.1 M chloride ion concentration, CM-o-DEAEC separated Pt(IV) before Au(III) and Pd(II) in the pH range from 1.0 to 2.0 without being affected by coexisting metal ions. In addition, the absorbed metal ions can be easily stripped by a 0.1 M thiourea-0.1 M HCl solution, and the adsorption rate only decreased by 3.0% and 1.8% after seven adsorption–desorption cycles. Therefore, it was shown that CM-n-DEAEC and CM-o-DEAEC are excellent adsorbents that can control the adsorption order of precious metals and can selectively and quickly recover Pd(II) or Pt(IV) from wastes containing Au(III). Graphic abstract
研究领域:
化学工程
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材料科学
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环境科学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）