ChemistrySelect
·
2023
·Vol. 8
·期 15
·e202300287
·
IF 2.1
Mengyu Liu,Xiang Yu,Lanting Yang,Guangzai Nong
Graphical In this study, copper-ammonia complexes were utilized as catalysts for the polymerization of hydroquinone. These complexes not only acted as catalysts, but also bound to the poly(hydroquinone) during the polymerization process. With acid hydrolysis to remove the complexes, a thermally stable poly(hydroquinone was obtained with a degree of polymerization of 2–9 and yield of 63.2 %. The copper-ammonia complexes also accelerated the polymerization rate by three times compared to using only ammonia solution, offering potential for improving hydroquinone polymerization efficiency. Poly(hydroquinone) (PHQ) is a class of polymers with a leading chain composed entirely of quinone-phenol structures, which possess both the heat resistance of polymers and the redox activity of the monomer quinone-phenol and have promising applications in sensors, anti-corrosion and antioxidants. However, the current synthesis efficiency is low, and the product solubility is poor, which hinders its wide application. In this paper, the copper-ammonia complex was used to catalyze the polymerization of hydroquinone. The product‘s structure was verified by FTIR, UV-Vis, XPS, SSNMR and EDS. The degree of PHQ obtained by GPC was 2–9, and the reaction mechanism of the polymerization process was demonstrated in detail. The experiments showed that the copper-ammonia complex not only acted as a catalyst but also participated in the reaction, firstly generating the PHQ copper-ammonia complex, which is almost insoluble in water and common organic solvents. Then by further acid washing to dislodge the copper-amino groups, the resulting PHQ was able to dissolve in solvents such as DMSO and methanol. In addition, the method is three times faster than the catalytic rate using an equivalent amount of ammonia.
研究领域:
材料科学
·
化学工程
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产品关联
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Yang Liu,Zejun Zhang,Yushu Li,Fan Shi,Yijing Ai,Baoli Wang,Siyue Zhang,Xiaoping Zhang,Wei Sun
An electrochemical sensor based on marine biomass shrimp shell-derived porous carbon (SSPC) modified glassy carbon electrode (GCE) was developed for the detection of hydroquinone (HQ) in this paper. The resultant SSPC was characterized by different methods including scanning electron microscopy and Fourier transform infrared spectroscopy. Brunauer-Emmett-Teller method was used to evaluate the pore structure and surface area of SSPC. The electrochemical behaviors of SSPC/GCE were explored by cyclic voltammetry and differential pulse voltammetry. The SSPC/GCE demonstrated linear response ranges of 5.0–25.0 μM and 25.0–1200.0 μM for HQ analysis with the limit of detection as 0.18 μM (S/N = 3). Additionally, the method had been successfully applied to determine HQ in real lake water sample, which provided potential applications in further sensing study.
研究领域:
材料科学
·
环境科学
·
分析化学
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Xuan Yang,Xueqin Wang,Shenghao Xu,Beili Lu,Biao Huang,Xinyu Zheng,Guanfeng Lin
Hydroquinone (HQ) in wastewater is of great concern, as it is harmful to human health and threatens the ecological environment. However, the existing adsorbents have low adsorption capacity for HQ. To improve the removal of HQ, N,S-codoped activated carbon-ZIF-67 (NSAC-ZIF-67@C) was synthesized in this study by in situ growth of ZIF-67 on N,S-codoped activated carbon (NSAC) and carbonization. The influence of pH, contact time, and initial concentration on the adsorption behaviors of NSAC-ZIF-67@C on HQ were investigated. Owing to the synergistic effect of abundant active sites and well-developed pore structure, the NSAC-ZIF-67@C achieved a prominent adsorption capacity of 962 mg·g–1 and can still retain high adsorption performance after 5 cycles for HQ, which is superior to that of reported other adsorbents. HQ adsorption follows the pseudo-second-order kinetics model (R2 = 0.99999) and the Freundlich isotherm model. X-ray photoelectron spectroscopy (XPS) analysis before and after adsorption as well as density functional theory (DFT) calculation results showed that pyridinic-N-termini were conducive to the π–π interactions and hydrogen-bonding interactions. Therefore, the adsorption mechanisms of NSAC-ZIF-67@C on HQ involve pore filling, electrostatic attraction, π–π interaction, and hydrogen bonding. This study is expected to provide a reference for designing highly effective adsorbents for wastewater treatment.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2018
·
IF 2.196
Chao Guo,Yangtong Tan,Yu Qian,Siyu Yang
Experimental liquid–liquid equilibria (LLE) data for ternary (methyl propyl ketone + hydroquinone + water) and (methyl propyl ketone + resorcinol + water) systems were determined under atmospheric pressure at T = 298.15, 318.15, and 333.15 K. Distribution coefficients and separation factors were calculated to evaluate extraction effectiveness. Hand, Bachman, and Othmer–Tobias equations were utilized to confirm consistency of experimental LLE data. Thermodynamic NRTL and UNIQUAC models were used to correlate experimental LLE data, and corresponding binary interaction parameters were obtained. The estimated data from the two models agree well with experimental LLE data. The NRTL model gives a better agreement than the UNIQUAC model for ternary (methyl propyl ketone + hydroquinone or resorcinol + water) systems.
研究领域:
化学工程
·
热力学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2017
·
IF 5.401
Haiguan Yang,Junqi Zha,Peng Zhang,Yuemei Qin,Tao Chen,Fanggui Ye
A simple method was proposed for the preparation of CeVO 4 . The as-synthesized CeVO 4 was, for the first time, demonstrated to exhibit both peroxidase-like and oxidase-like activity, which catalyzes the oxidation of 3, 3′, 5, 5′-tetramethylbenzidine (TMB) to form a typical blue solution in the presence or absence of H 2 O 2 . Moreover, the mechanism of its dual-enzyme activity was investigated in detail. The Michaelis constant ( K m ) value for CeVO 4 (0.136 mM) was lower than that of horseradish peroxidase (0.424 mM) with TMB as the substrate. Interestingly, hydroquinone (H 2 Q), dihydroxybenzene isomer, undergoes reduction accompanying the oxidation of TMB by the CeVO 4 oxidase mimic along with a visible color change, while the other two dihydroxybenzene isomers, i.e., resorcinol (RC) and catechol (CC), do not. Based on these findings, a colorimetric platform was developed to discriminate H 2 Q from RC and CC. Under optimal conditions, a linear relationship between the H 2 Q concentration and absorbance was observed from 0.05 to 8 μM, and a limit of detection of 0.04 μM was achieved. Moreover, this colorimetric platform can selectively reveal H 2 Q concentrations in the presence of other dihydroxybenzene isomers.
研究领域:
生物化学
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环境科学
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材料科学
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Yitian Su,Hongmin Jiang,Qiaoling Kang,Xianhe Meng,Xiaomei Zheng,Jianfei Lu,Xingkun Mei,Xiangdong Sun,Lijing Yan,Tingli Ma
All-organic aqueous batteries are deemed attractive energy storage systems for some application scenarios demanding recyclability or wearability. The efficient redox activity of quinone/hydroquinone-derived couples in biosystems inspires us to develop advanced batteries based on them. However, designing such an all-organic aqueous battery is challenging in selecting suitable electrolytes and active materials. A possible battery configuration consisting of the 9, 10-anthraquinone (AQ) anode, hydroquinone derivatives cathode, and weak acid metal-ion aqueous electrolyte is demonstrated herein. The molecular configuration of quinones and ionic type of electrolytes affect the redox behaviors of electrodes. Gratifyingly, a combination of AQ-tetrachlorohydroquinone-Al 2 (SO 4 ) 3 exhibits optimal performance. The underlying work mechanism of this full-battery configuration is disclosed by electrochemical and structural characterizations, finding that H + and Al 3+ are jointly involved in the redox reaction of quinone electrodes, and Al 3+ plays a crucial role. This work inaugurates a new framework for designing an all-organic aqueous battery.
研究领域:
能量存储系统
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电化学
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材料科学
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DOI
高影响因子
ANALYST
·
2015
·Vol. 140
·期 17
·6047-6053
·
IF 4.107
Min Zhong,Yunlong Dai,Limei Fan,Xiaojing Lu,Xianwen Kan
A facile electrochemical sensor for hydroquinone (HQ) and catechol (CC) determination was successfully fabricated by the modification of poly(3-aminophenylboronic acid) (pAPBA) film and multi-walled carbon nanotubes (MWCNTs) on a glassy carbon electrode (pAPBA/MWCNTs/GCE). The prepared sensor was characterized by scanning electron microscope and electrochemical impedance spectroscopy. Under optimal conditions, differential pulse voltammetry was employed to quantify individual HQ and CC within the concentration range of 5.0 × 10−7–4.0 × 10−5 mol L−1 and 7.0 × 10−6–1.0 × 10−4 mol L−1, respectively. Based on the covalent binding between the boronic acid groups of pAPBA film and the cis-diol-containing molecule, a novel substitution-sensing strategy was proposed for the highly sensitive determination of CC. With the addition of CC into HQ solution, covalent interaction between CC and APBA occurred and the HQ was displaced by CC, resulting in a decrease of HQ oxidation peak current and the increase of the CC oxidation peak current. The summation of both current changes (Δ|IHQ| + Δ|ICC|) were combined for CC sensitive detection in a concentration range of 4.0 × 10−8–1.7 × 10−5 mol L−1 with a limit of detection of 4.3 × 10−9 mol L−1. The sensor was successfully applied to the determination of CC in spiked water samples.
研究领域:
分析化学
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环境科学
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产品关联
DOI
PubMed
高影响因子
Coatings
·
2024
·Vol. 14
·期 4
·453
·
IF 2.9
Ningning Xing,Lilin Yang,Li Wang,Yanxiang Lu,Hongkun Zhang,Xijun Sun,Min Zhao,Wenjie Tan,Jie Yang
The reliable detection of environmental contaminants can correctly forecast the degree of environmental pollution that has occurred, which contributes to improving the environmental purification rate and maintaining the ecological balance. Herein, a novel hierarchical biomimetic catalysis MnO2@CuAl-CLDHs was designed and synthesized using a facile method, which exhibited significantly enhanced peroxidase-like activity due to the unique composition and hierarchical mesoporous structure. Under optimized operational conditions, a visible colorimetric array based on the superior nanozyme activity of MnO2@CuAl-CLDHs was developed for the quantitative determination of hydroquinone with a wide linear detection range (1–100 μM) and a low detection limit (0.183 μM). Simultaneously, our presented strategy could analyze hydroquinone in real water samples with high accuracy. Therefore, the bimetallic co-catalyzed nanozymes are expected to be the perfect replacement for natural enzymes to develop convenient and efficient sensors.
研究领域:
环境科学
·
生物化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2018
·
IF 6.434
Hailong Wang,Quanqin Hu,Yuan Meng,Zier Jin,Zilin Fang,Qinrui Fu,Wenhua Gao,Liang Xu,Yibing Song,Fushen Lu
Reduced graphite oxide (rGO) was incorporated into a metal organic framework (MOF) MIL-101(Cr) for the modification of carbon paste electrode. Taking advantages of the large surface area of MOF and the electrical conductivity of rGO, the resulted electrodes exhibited high sensitivity and reliability in the simultaneous electrochemical identification and quantification of catechol (CC) and hydroquinone (HQ). Specifically, in the mixture solution of catechol and hydroquinone (constant concentration of an analyte), the linear response ranges for catechol and hydroquinone were 10–1400 μM and 4–1000 μM, and detection limits were 4 μM and 0.66 μM (S/N = 3) for individual catechol and hydroquinone, respectively. Therefore, the relatively easy fabrication of modified CPE and its fascinating reliability towards HQ and CC detection may simulate more research interest in the applications of MIL-101(Cr)-rGO composites for electrochemical sensors.
研究领域:
分析化学
·
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Xinyue Wang,Li Liu,Binbin Jiang,Weiwei Xie,Qingyang Chong,Song Li,Zhiming Chen
The rapid and sensitive detection of hazardous substances is essential for safeguarding human health. This work presented the synthesis of laccase immobilized on N-doped carbon nanonets (N-doped carbon nanonets-lac) biosensor and its application for the photothermal detection of hydroquinone. The N-doped carbon nanonets-lac biosensor demonstrated rapid response and precise detection of hydroquinone in 5 s, along with excellent sensitivity, good tolerance to metal ions and organic compounds, outstanding selectivity, and storage stability. Thanks to the photothermal effect of N-doped carbon nanonets, the N-doped carbon nanonets-lac biosensor was demonstrated as a photothermal biosensor for hydroquinone detection. The N-doped carbon nanonets-lac biosensor exhibits a highly sensitive current response under illumination, with a detection limit as low as 0.14 μM (S/N = 3) and an extensive response range of 1–1000 μM. Furthermore, the N-doped carbon nanonets-lac biosensor showed reliable performance in photothermal analysis of tap and Yangtze River water samples, highlighting its technical effectiveness in detecting contamination of toxic compounds in real water samples.
研究领域:
环境科学
·
生物化学
·
分析化学
✓ 已验证
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2019
·Vol. 166
·期 15
·B1400
·
IF 3.12
Xiaohua Zhu,Can Wu,Liqiong Miao,Yanyu Zhang,Shengming Cheng,Yong Liang,Junmin Nan
The electrocatalytic role of oxygenated defects in graphite nanoplatelets (GNPs) was evaluated to advance the nanosized graphite as an alternative modified matrix in electrochemical sensors. The oxidized GNPs (ox-GNPs) were prepared via a ball milling and oxidizing process. The abundant functional groups and defective sites in the ox-GNPs result in the excellent electrocatalytic activity compared with GNPs. The redox behaviors of hydroquinone and catechol at the ox-GNPs modified glassy carbon electrode (ox-GNPs/GCE) were investigated. Compared to GNPs/GCE, the as-prepared ox-GNPs/GCE exhibited enhanced electrocatalytic activity and well-define redox peaks. The detection limit was 0.4 and 0.6 μM for hydroquinone and catechol, respectively (S/N = 3). In addition, this ox-GNPs/GCE also shows potential applications to the practical sample and some important biomolecules. The as-prepared ox-GNPs/GCE all can exhibit efficient sensitivity for the electrochemical determination of neurotransmitters (ascorbic acid and dopamine), nucleic acid bases (guanine), pharmaceuticals (rutin and thymol), and other biological molecules (uric acid). These results demonstrate the potential of nanosized graphite material in sensing applications.
研究领域:
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
TOXICOLOGY
·
2017
·
IF 3.582
Chuanyang Su,Zixuan Liu,Yawen Wang,Yuxin Wang,Erqun Song,Yang Song
The activation of nuclear factor erythroid 2-related factor 2 (Nrf2) is the most important cellular defense mechanisms against oxidative attack. BTB and CNC homology-1 (Bach1), like Kelch-like ECH-associated protein 1 (Keap1), is one of a negative regulator of Nrf2 that control antioxidant response elements (ARE)-dependent gene expressions. In the current study, we found that quinones show greater capacity than hydroquinones in nuclear Bach1 export, as well as ubiquitin-dependent Bach1 degradation in our experimental time frame. Consistently, quinones are easier than hydroquinones in Nrf2 activation and ARE-driven antioxidant protein expressions. Considering the redox cycling potential of quinone-hydroquinone couple, we investigated the effect of transit metal oxidation on the regulation of Nrf2 activity. As shown, Fe 3+ enhanced hydroquinone-induced Nrf2 activation and ARE-driven gene expressions, suggesting quinones rather than hydroquinone activate Nrf2 through Bach1 arylation. Taking together, our investigation illustrated that the electrophilic character of quinones ensure their conjugation with Bach1, which is important for the downregulation of Bach1 and the upregulation of Nrf2 signaling.
研究领域:
生物化学
·
分子生物学
·
细胞信号传导
·
氧化应激
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）