Materials
·
2023
·Vol. 16
·期 18
·6212
·
IF 3.4
Wenjie Tan,Rui Xin,Jiarui Zhang,Lilin Yang,Min Jing,Fukun Ma,Jie Yang
Given the serious harm of toxic phenol to human health and the ecological environment, it is urgent to develop an efficient, low-cost and sensitive nanoenzyme-based method to monitor phenol. MOF-derived nanozyme has attracted wide interest due to its hollow polyhedra structure and porous micro-nano frameworks. However, it is still a great challenge to synthesize MOF-derived multimetal synergistic catalytic nanoenzymes in large quantities with low cost. Herein, we reported the synthetic strategy of porous hollow CA-CoNiMn-CLDHs with ZIF-67 as templates through a facile solvothermal reaction. The prepared trimetallic catalyst exhibits excellent peroxidase-like activity to trigger the oxidative coupling reaction of 4-AAP and phenol in the presence of H2O2. The visual detection platform for phenol based on CA-CoNiMn-CLDHs is constructed, and satisfactory results are obtained. The Kmvalue for CA-CoNiMn-CLDHs (0.21 mM) is lower than that of HRP (0.43 mM) with TMB as the chromogenic substrate. Because of the synergistic effect of peroxidase-like activity and citric acid functionalization, the built colorimetric sensor displayed a good linear response to phenol from 1 to 100 μM with a detection limit of 0.163 μM (3σ/slope). Additionally, the CA-CoNiMn-CLDHs-based visual detection platform possesses high-chemical stability and excellent reusability, which can greatly improve economic benefits in practical applications.Keywords:metal organic framework;nanozyme;colorimetric detection;phenol
研究领域:
生物化学
·
环境科学
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产品关联
DOI
PubMed
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2023
·
IF 9.8
Xiaodan Zhao,Jiahui Wei,Ying Wu,Zuoming Zhou,Guohua Jing
Sulfite autoxidation in combination with the cobalt-based heterogeneous activators, has recently emerged as the efficient sulfate radical (SO 4 •− ) generation process for organic micropollutant abatement in the water and wastewater treatment , yet the sluggish >Co(II)/Co(III) redox cycling currently compromises the efficacy of radical generation and the potential applications. Herein, regarding that the reductive W(IV) species in WS 2 can modulate the >Co(II)/Co(III) redox cycling in the advanced oxidation processes , confinement of cobalt with WS 2 (Co-WS 2 ) is designed and characterized. The Co-WS 2 /sulfite process achieves an ultrafast tetracycline (TC) abatement (∼100 % abatement of TC within 1 min) under circumneutral conditions with lower dosage of sulfite and activator, outperforming the current cobalt-based heterogeneous counterparts. The dominant reactive radicals are identified as SO 4 •− and hydroxyl radical (HO • ), which are quantified to be 9.7 μM and 4.5 μM, respectively. The superior radical generation efficiency and the concomitant TC abatement rely on the excellent redox properties and electron transfer capability of Co-WS 2 . The inter-transformation of >Co(II)/>Co(III) can be accelerated via the involvement of the reductive W(IV) species with the redox-reversibility of the W(IV)/W(VI) couple in the presence of sulfite. The TC degradation intermediates and the corresponding pathways are also proposed according to the ultra-performance liquid chromatography and quadrupole-time of flight mass spectrometry (UPLC-QTOF-MS) analysis. In addition, the influences of the reactant dosage, coexisting anions (HCO 3 − , HPO 4 2− , Cl − and NO 3 − ), humic acid and the various real water matrices on TC abatement are thoroughly explored. Especially, the Co-WS 2 /sulfite process is advantageous owing to the negligible effect of the coexisting anions on the TC abatement. This study provides a novel heterogeneous activator for significantly improving sulfite activation efficacy to achieve the efficient organic micropollutant abatement.
研究领域:
环境科学
·
化学工程
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DOI
高影响因子
WATER RESEARCH
·
2022
·
IF 13.4
Lingwei Gao,Yang Guo,Juhong Zhan,Gang Yu,Yujue Wang
Reactive species such as sulfate radicals ( SO 4 • − ), hydroxyl radicals ( • OH), and/or singlet oxygen ( 1 O 2 ) have often been proposed as the main reactive species for pollutant abatement during the persulfate-based process, and their relative importance is conventionally assessed by the quenching method based on an implicit fundamental assumption that the added high-concentration quenchers (e.g., tert-butanol and methanol) only scavenge their target reactive species, but do not considerably affect the other reaction mechanism of the system. To examine the validity of this assumption, this study evaluated the effects of several commonly used quenchers (tert-butanol, methanol, ethanol, isopropanol, furfuryl alcohol, and L-histidine) on the mechanism of a cobalt mediated peroxymonosulfate (Co(II)/PMS) process. The results demonstrate that besides quenching target reactive species, the added high-concentration quenchers can cause many confounding effects on the Co(II)/PMS process, e.g., accelerating PMS decomposition, interfering reactive species production, and quenching of non-target reactive species. Because of these confounding effects, the quenching method can actually lead to serious misinterpretation of the role of reactive species in pollutant abatement during the persulfate-based process. The findings of this study highlight that the underlying assumption of the quenching method is usually invalid for the persulfate-based process. Therefore, it should be cautious to apply the quenching method to investigate the mechanism of the persulfate-based process, and some debatable conclusions of prior studies obtained with the quenching method may require further verification.
研究领域:
环境化学
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水处理
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污染控制
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高级氧化过程
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DOI
高影响因子
CHINESE JOURNAL OF CHEMISTRY
·
2011
·Vol. 29
·期 3
·387-398
·
IF 0.773
Yan Liu,Zhanchao Liu,Jiangdong Dai,Jie Gao,Jimin Xie,Yongsheng Yan
A novel surface ion imprinted adsorbent [Co(II)-IIP] using polyethyleneimine (PEI) as function monomer and ordered mesoporous silica SBA-15 as support matrix was prepared for Co(II) analysis with high selectivity. The prepared polymer was characterized by Fourier transmission infrared spectrometry, scanning electron microscopy, X-ray diffraction and nitrogen adsorption-desorption isotherm. Bath experiments of Co(II) adsorption onto Co(II)-IIP were performed under the optimum conditions. The experimental data were analyzed by pseudo-first-order and pseudo-second-order kinetic models. It was found that the pseudo-second-order model best correlated the kinetic data. The intraparticle diffusion and liquid film diffusion were applied to discuss the adsorption mechanism. The results showed that Co(II) adsorption onto IIP was controlled by the intraparticle diffusion mechanism, along with a considerable film diffusion contribution. Langmuir, Freundlich and Dubinin-Radushke- vich adsorption models were applied to determine the isotherm parameters. Langmuir model fitted the experiment data well and the maximum calculated capacity of Co(II) reached 39.26 mg/g under room temperature. The thermodynamic data were indicative of the spontaneousness of the endothermic sorption process of Co(II) onto Co(II)-IIP. Co(II)-IIP showed high affinity and selectivity for template ion compared with non imprinted polymer (NIP).
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DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Zexian Chen,Yaojie Zhang,Wenjuan Dong,Yang Liu,Li Zhang,Yueping Dong,Zihan Wang,Yihong Chen,Qin Hu,Chuan Dong,Xiaojuan Gong
Lignin-derived carbon dots (L-CDs) were synthesized via a simple one-step hydrothermal method using sodium lignosulfonate and polyethylene polyamine as carbon and nitrogen sources, respectively. The obtained L-CDs exhibited strong blue fluorescence, which was effectively quenched by Co(II) and VB 12 through an inner filter effect (IFE), accompanied by distinct color changes under both visible and ultraviolet light. Taking advantage of this property, a smartphone-assisted visual sensing strategy was developed for the rapid and portable detection of Co(II) and VB 12 with high selectivity and sensitivity. The detection limits were as low as 0.17 μM for Co(II) and 0.03 μM for VB 12 . Furthermore, the proposed sensing platform was successfully applied to the determination of Co(II) in environmental water samples and VB 12 in pharmaceutical formulations. This work not only demonstrates a novel design of carbon dot-based dual-mode sensors but also highlights the value-added utilization of lignin in analytical applications.
研究领域:
分析化学
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环境监测
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药物分析
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纳米生物技术
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传感器开发
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食品安全
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转化医学
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产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2023
·
IF 4.8
Zanling Huang,Shuqi Zhu,Abebe Reda Woldu,Wenhua Gao,Jing-Xin Jian,Paul K. Chu,Qing-Xiao Tong,Liangsheng Hu
Electrochemical glucose detection co-catalyzed by bimetallic ions is carried out by introducing Co(II) and Cu(II) into the alkaline solution. The technique avoids the complicated electrode design and catalyst poisoning. By using nitrogen-doped carbon nanotubes (NCNT) loaded on carbon cloth (CC) as the working electrode, the bimetal co-catalytic system achieves a sensitivity of 6,909 mA M −1 cm −2 , a detection limit of 0.4 μM (S/N = 3), as well as good selectivity and stability. By performing systematic electrochemical and structural analysis, the mechanism of Co(II) and Cu(II) co-catalysis for glucose detection in the solution is elucidated. Co(II) supplies the dynamic reaction sites and source of active intermediate (CoOOH), while Cu(II) promotes the formation of CoOOH. The results provide mechanistic insights into bimetal co-catalysis of glucose detection and other electrochemical reactions .
研究领域:
电化学
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材料科学
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分析化学
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DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2021
·
IF 3.196
Zhiyuan Feng,Lin Cheng,Hong Fan,Jia Liu,Fusheng Han
This article has been retracted: please see Elsevier Policy on Article Withdrawal ( http://www.elsevier.com/locate/withdrawalpolicy ). This article has been retracted at the request of the Editor-in-Chief. In investigating concerns brought up regarding the authenticity of the article, the editors reached out to the corresponding author for an explanation and to request the original data. Per journal policy, the editors, at their discretion, may request deposition of any or all original data files for examination by the reviewers and/or editors. As a result of the author’s unsatisfactory explanation and failure to provide these data—in violation of journal policy—the editors feel that the findings of the manuscript cannot be relied upon. The corresponding author agrees to this retraction.
研究领域:
材料科学
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生物学
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医学
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DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2019
·Vol. 27
·期 3
·2588-2598
·
IF 2.914
Yuan Donghai,Zhang Wenjing,Cui Jun,He Liansheng,Wang Jiazhuo,Yan Chenling,Kou Yingying,Li Junqi
Magnetic phosphorylated chitosan composite (P-MCS), an excellent adsorbent for Co(II), was synthesized in this experiment via a facile fabrication. Its removal efficiency was improved by optimizing pH, contact time, and initial concentration. The adsorption isotherms and kinetic models of Co(II) by P-MCS followed the Langmuir model and the pseudo-second-order model, respectively. However, the rate of adsorption was also affected by intragranular diffusion. The maximum adsorption capacity was 46.1 mg g-1 for Co(II). The results of spectroscopic analysis also indicated that good adsorption performance of Co(II) mainly depends on surface chelation between functional groups and metal ions. The saturation magnetic susceptibilities of P-MCS and P-MCS-Co were 22.29 emu g −1 and 18.18 emu g −1 , respectively. The excellent magnetic properties of P-MCS enabled the easy achievement of solid-liquid separation via the use of an external magnetic field. In complex aqueous solutions, K + , Na + , Ca 2+ , and Mg 2+ have less influence on P-MCS adsorption Co(II), but the adsorption capacity on Co(II) is still good. This study shows the feasibility of using P-MCS to treat wastewater containing Co(II).
研究领域:
环境科学
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材料科学
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DOI
PubMed
高影响因子
Molecular Catalysis
·
2025
·
IF 4.9
Hang Zhao,Xiuying Liu,Siyu He,Mingxia Guo,Yuhan Huang,Yifan Niu,Haiqing Jiang,Qian Li
Advanced oxidation processes (AOPs) are effective approaches for the removal of organic contaminants from water. In this study, a combined hydrogen peroxide-bicarbonate (H 2 O 2 -HCO 3 − ) oxidant system was engineered for a Fenton-like process catalyzed by lithium cobalt oxide (LCO). The oxidant system integrates hydrogen peroxide oxidation with bicarbonate's dual functionality as both an H 2 O 2 activator and pH buffer. Efficient contaminant degradation was achieved by the LCO/H 2 O 2 HCO 3 − system under neutral or weakly alkaline conditions, and the solution pH remained stable throughout the reaction, due to the presence of HCO 3 − . A comprehensive investigation into the optimization of reaction parameters governing the removal of a phenothiazine dye was conducted. The mechanism driving the generation of reactive oxygen species (ROS) which are responsible for the degradation of organic contaminants was elucidated. These ROS were identified as superoxide radicals, singlet oxygen, and hydroxyl radicals. The Co(III)/Co(II) redox pair in LCO served as the key active sites for activating the H 2 O 2 HCO 3 − . In addition, a possible pathway of the degradation of the phenothiazine structure was proposed based on ultraviolet-visible spectroscopy and liquid chromatography-mass spectrometry analysis. The LCO/H 2 O 2 -HCO 3 − system shows great promise as a sustainable Fenton-like approach for wastewater treatment, with cost-effectiveness, high efficiency, environmental friendliness, and compatibility with neutral or weakly alkaline conditions.
研究领域:
环境化学
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材料科学
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水处理技术
·
催化
·
化学工程
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产品关联
DOI
高影响因子
RSC Advances
·
2012
·Vol. 2
·期 8
·3309-3314
·
IF 0
Yanghe Fu,Dengrong Sun,Meng Qin,Renkun Huang,Zhaohui Li
Aerobic oxidation of cyclohexene over [Cu2(OH)(BTC)(H2O)]n·2nH2O (Cu-MOF, BTC = 1,3,5-benzenetricarboxylic acid) and [M2(DOBDC)(H2O)2]·8H2O (Co-and Ni-MOF, DOBDC = 2,5-dihydroxyterephthalic acid) in the absence of solvent under mild conditions was studied. It is observed that both Cu-MOF and Co-MOF can selectively oxidize cyclohexene to give 2-cyclohexen-1-ol and 2-cyclohexen-1-one as the main products, while Ni-MOF is totally inactive for cyclohexene oxidation. The mechanism of the catalytic oxidation of cyclohexene over Cu-MOF and Co-MOF has been proposed. These MOF-based catalysts are stable and recyclable under current reaction conditions. This study highlights the great potential of developing MOFs as highly stable, molecularly tunable, recyclable and reusable heterogeneous catalysts for alkenes oxidation.
研究领域:
无机化学
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催化化学
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材料化学
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绿色化学
·
有机合成
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DOI
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Xianni Song,Wenzhong Wang,Yu Guo
Methyl phenyl sulfoxide (PMSO), conventionally employed to probe high-valent metal-oxo species in persulfate processes, is reveals herein as a substrate-dependent mediator that selectively enhanced/inhibited degradation of various pollutants in Fe(II)/peroxymonosulfate (PMS) systems. Control experiments across transition-metal systems (Fe(II)/Co(II)/Cu(II)/Mn(II)/Fe(III)) confirmed that this phenomenon is unique to Fe(II)-based systems. The system-dependent behavior of PMSO is demonstrated to correlate with ROS generated in each system. In Fe(II)/PMS systems dominated by Fe IV O 2+ , SO 4 ·– and unidentified iron-centered species, PMSO exhibits dual functionality: as an electron shuttle, enhancing degradation of electron-rich pollutants by facilitating electron transfer and promoting the Fe(III)/Fe(II) cycle; conversely, for electron-deficient pollutants, PMSO functions as a conventional scavenger, suppressing degradation. Quantitative structure-activity relationships (QSARs) modeling establishes that PMSO enhances degradation for pollutants with the highest occupied molecular orbital (HOMO) ≥ −8.3154 eV and ionization potential (IP) ≤ 6.9711 eV; otherwise, it inhibits degradation. In Co(II)/PMS systems dominated by Coᴵᴵ-PMS* complexes, PMSO competitively consumes Coᴵᴵ-PMS* and quenches SO 4 – resulting in uniform inhibition of all pollutants. Negligible PMSO effect was observed in Cu(II)/Mn(II)/Fe(III) systems with ineffective PMS activation. This work challenges the uncritical use of PMSO as an inert probe in Fe(II) systems, highlights metal-peroxo complexes as pivotal intermediates dictating electron-transfer pathways and provides principles for designing selective advanced oxidation processes (AOPs) through mediator tuning.
研究领域:
环境化学
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化学工程
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水处理
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高级氧化工艺
·
反应机理
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产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Miwan Shi,Yuan Weng,Shengxi Wu,Lu Zhang,Chaoyue Deng,Pengxiang Li,Yunmin Wang,Kui Gu
Utilizing efficient diagnostic methods to assess antibody levels in unexposed individuals and vaccinated populations is of significant importance for the prevention and control of rabies virus (RV). In this study, we developed a novel label-free electrochemical immunosensor based on AgNPs@Co( II )MOFs@PtNPs composite materials for the rapid detection of RV antibodies. The RV nucleocapsid protein (NP) antigen and its nanobodies were firstly prepared using genetic engineering techniques as reagent materials. Next, a bimetallic composite of AgNPs@Co( II )MOFs@PtNPs was synthesized via a mixed solvothermal method, with cobalt-based metal-organic frameworks (Co-MOFs) serving as the substrate. This composite was deposited onto the surface of a glassy carbon electrode, where the RV-NP antigen was covalently attached to the Co-MOF surface, enabling specific binding with RV antibodies. The antigen-antibody interaction resulted in detectable changes in the current, facilitating the sensing process. Finally, the developed immunosensor exhibited a linear detection range for RV NP antibodies from 7.576 × 10 −11 mol/L to 3.788 × 10 −5 mol/L, with a correlation coefficient (R 2 ) of 0.9965 in differential pulse voltammetry, and the limit of detection was defined as 4.508 × 10 −10 mol/L. Furthermore, the newly immunosensor demonstrated excellent repeatability, stability, specificity, and clinical applicability, making it a promising, precise, and cost-effective tool for the early screening of RV antibodies.
研究领域:
免疫学
·
生物传感器
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分子诊断
·
纳米医学
·
病毒学
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电化学分析
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转化医学
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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）