RSC Advances
·
2022
·Vol. 12
·期 9
·5062-5071
·
IF 4.036
Zhenshan Li,Qi Li,Rong Jiang,Yan Qin,Yan Luo,Jinsong Li,Wei Kong,Zhiguo Yang,Chao Huang,Xin Qu,Tao Wang,Lin Cui,Gang Wang,Shengchao Yang,Zhiyong Liu,Xuhong Guo
Cu(II) ions are one of the most common forms of copper present in water and can cause bioaccumulation and toxicity in the human body; therefore, sensitive and selective detection methods are required. Herein, a copper ion sensor based on a UiO-66-NH2/ZnO composite material is proposed. The UiO-66-NH2/ZnO nanocomposite was prepared by an ultrasonic mixing method. The morphology and structure of the nanocomposite were studied by scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffraction (XRD). The sensitivity to Cu(II) is 6.46 μA μM−1 and the detection limit is 0.01435 μM. The composite material is rich in –OH and –NH2 groups, which are active sites for Cu(II) adsorption. The UiO-66-NH2/ZnO-modified electrode has good repeatability and anti-interference ability. The sensor was successfully used for the determination of Cu(II) in an actual water sample.
研究领域:
环境科学
·
分析化学
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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
·
催化化学
·
材料化学
·
绿色化学
·
有机合成
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DOI
RSC Advances
·
2015
·Vol. 5
·期 118
·97435-97445
·
IF 3.84
Yuling Cai,Liuchun Zheng,Zhanqiang Fang
To reduce costs and improve practicability, an ion imprinted magnetic chitosan (IMCS) was synthesized through co-precipitation using steel pickling waste liquor and chitosan and Cu(II) as template ions, which was then characterized by TEM, SEM, EDX, FTIR, XRD and VSM. The batch experiments were carried out for its potential application and high selectivity of Cu(II) removal, which were observed due to the paramagnetic properties and coordination reactions in the imprinted cavities. Kinetic studies revealed that the adsorption process followed a pseudo second-order model and the equilibrium data fit perfectly with the Langmuir isotherm model. The maximum adsorption capacity was 109.89 mg g−1. Negative values for ΔH0 and ΔG0 indicated an exothermic and spontaneous adsorption process. The adsorption process was found to be a chemical reaction and coordination complexes were formed between the metal ions and the groups of chitosan binding mainly in the “bridge model”. Moreover, 0.2 mol L−1 HCl solution was considered as the most appropriate eluent for regeneration. It showed a great performance in the experiments for practical copper wastewater and the process was considerably cost-effective.
研究领域:
环境化学
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材料科学
·
污染控制工程
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资源循环利用
·
吸附技术
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DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2018
·
IF 5.807
Meng Li,Shaoqi Zhou
Cu(II) ion was employed as an electron-shuttle mediator to enhance bioelectricity output and accelerate reduction rate of Cr(VI) in a dual-chamber microbial fuel cell (MFC). In the presence of Cu(II), power density and the Cr(VI) reduction rate were 1235.53 mW m −2 and 1.191 g m −3 h −1 , respectively, which were 1.44 times and 1.17 times than that of MFC in the absence of Cu(II). A series of electrochemical analysis confirmed the presence of Cu(II) can diminish overpotential and diffusional resistance of MFC, further accelerating electrochemical reduction process of Cr(VI) via an indirect mechanism. After reduction, Cr(VI) and Cu(II) in this work were mainly deposited on cathode electrodes in the form of Cr(OH) 3 and little Cu, thus wastewater containing Cr(VI) was successfully treated by bio-electrochemical technology. The aim of this work was to study the efficacy of Cu(II) as an electron-shuttle mediator for improved bioelectricity generation and Cr(VI) reduction in MFCs.
研究领域:
环境工程
·
生物电化学
·
废水处理
·
能源回收
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Zhaofeng Zhai,Nan Huang,Hao Zhuang,Lusheng Liu,Bing Yang,Chun Wang,Zhigang Gai,Fengxiang Guo,Zhengjun Li,Xin Jiang
A platform for the determination of Zn(II), Cd(II), Pb(II) and Cu(II) has been proposed based on a novel diamond/graphite (D/G) nanoplatelets film electrode using differential pulse anodic stripping voltammetry method. The microstructure and the composition of the film were characterized by scanning electron microscope (SEM), atomic force microscope (AFM), Raman spectroscopy and transmission electron microscope (TEM). The D/G nanoplatelets structure with two-dimensional diamond nanoplatelet as the stem and highly conducting graphite layers as shells exhibits large specific surface and great electrical conductivity, significantly enhancing the electron transport in the electrochemical reaction. Under the optimum conditions, wide linear ranges and high sensitivity were achieved. In the typical detection process, two linear working ranges were obtained due to the incomplete anodic removal and the limits of detection (LODs) were estimated to be 1.72 μg L −1 , 0.47 μg L −1 , 4.86 μg L −1 and 0.45 μg L −1 for Zn(II), Cd(II), Pb(II) and Cu(II), respectively. The simultaneous detections also verify the superior analytical performance with linear ranges from 10 μg L −1 to 250 μg L −1 and low LODs. Herein, we present a novel diamond/graphite nanoplatelets electrode without any modification/functionalization for the sensitive detection of trace heavy metal ions .
研究领域:
分析化学
·
材料科学
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DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2021
·
IF 5.268
Zhiyue Li,Zhiwei Guo,Taoyi Zhang,Quan Li,Jing Chen,Wenxi Ji,Cong Liu,Yun Wei
Synthesizing high uniform metal-organic frameworks grown on natural biomass such as sodium alginate (ALG), which can efficiently remove metal ions from aqueous solution, is a challenging project. A simple and eco-friendly method of preparing ALG@ZIF-67 hydrogels by in situ synthesis of ZIF-67 onto ALG hydrogels was established. Combining the virtues of ALG with abundant hydroxyl and carboxyl groups and ZIF-67 with excellent porous structure, the obtained ALG@ZIF-67 hydrogels have excellent adsorption for Cu 2+ (153.63 mg/g), which was much higher than that of pure ALG hydrogels (111.79 mg/g). The methodology showed that the adsorption process was in accord with the Langmuir isotherm adsorption model (R 2 = 0.9972) and pseudo-second-order kinetic model (R 2 = 0.9822). The thermodynamic experiments demonstrated that Cu (II) was absorbed by hydrogel with an endothermic and spontaneous process. The competitive adsorption experiment results of ALG@ZIF-67 hydrogel indicated that the absorption capacity of Cu (II) was higher than that of Cd (II), Ni (II), Zn (II) and Mn (II). Moreover, the ALG@ZIF-67 hydrogels still had excellent reusability after five adsorption-desorption cycles. The results indicated that the ALG@ZIF-67 hydrogels had the advantages of low cost, easy preparation, and environment friendly.
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2026
·
IF 9.2
Maolin Wang,Haoyang Fu,Yanchun Fan,Gang Zhao,Tianwen Liu,Yi Liu,Qingqing Wu,Ying Huang
Persulfate (PS)-based advanced oxidation of polycyclic aromatic hydrocarbons (PAHs) in carbonate-rich water is severely constrained by radical scavenging and surface passivation of iron-based activators. Here, a dithionite–zerovalent iron–copper (DTN–ZVI–Cu) ternary system was developed to promote persulfate activation toward predominantly non-radical oxidation under bicarbonate-rich conditions. DTN and ZVI accelerated Cu(II)-to-Cu(I) reduction while simultaneously regenerating the ZVI surface, thereby sustaining Cu-centered redox turnover and facilitating the formation of Cu(III)-like oxidizing species. In parallel, DTN promoted sulfur-centered conversion pathways that favored 1 O 2 generation. These non-radical oxidizing pathways are generally less susceptible to inorganic-anion scavenging than conventional sulfate and hydroxyl radicals. Under standard conditions, the system achieved 91% acenaphthene removal within 60 min ( k obs = 0.039 min −1 ), an 8.7-fold kinetic enhancement over ZVI/PS alone. Moderate bicarbonate further promoted degradation, with k obs reaching 0.13 min −1 at 250 mg/L HCO 3 − , which is consistent with a plausible role of copper–carbonate complexation in stabilizing Cu redox cycling and favoring non-radical oxidation pathways. XPS analysis suggested that DTN–ZVI coupling elevated the reactive copper pool (Cu(I) + Cu(III)) to 57% of total surface copper. Applied to synthetic wastewaters, the system maintained 90–96% PAH removal at optimal dosages, indicating strong performance across complex saline matrices. This work demonstrates the feasibility of using coexisting Cu(II) as a catalytic resource for non-radical persulfate activation in carbonate-rich water.
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产品关联
DOI
PubMed
高影响因子
DESALINATION
·
2026
·
IF 9.9
Karim Youssef Nabat,Ali Raza Ayub,Ahmed E. Mansy,Tesfa Oluma Fufa,Niu Zhang,Xiyan Xu,Hansheng Li,Hui Li
Green CMC/PVA based Schiff base bio-composite material successfully Fabricated • CMC/PVA-LH35 composite achieved adsorption capacity of 532.15 mg/g for Cu(II) • CMC/PVA-LA35 composite achieved adsorption capacity of 516.49 mg/g for Zn(II) • High reusability after 6 cycles with low-cost adsorbents for desalination • DFT computational analysis to elucidate the structural and binding mechanism Metal contamination in water sources is a critical threat to human health and water ecosystems, which reduces the efficiency of water desalination. Therefore, the development of materials for metal removal is essential for water purification. In this study, two novel Schiff bases (LA35 and LH35) were immobilized in a carboxymethyl cellulose/polyvinyl alcohol (CMC/PVA) matrix via robust hydrogen bonding. The CMC/PVA-LA35 and CMC/PVA-LH35 composite adsorbents achieved a maximal adsorption of 474.38 mg/g and 532.15 mg/g for Cu(II) and 516.49 mg/g and 468.04 mg/g for Zn(II), respectively, at optimum conditions, pH 5, 318 K, and 300 mg/L. The data fit the Langmuir isotherm model, suggesting that adsorption occurred on a homogeneous mono-layer surface with uniform binding sites. Additionally, a thermodynamic analysis confirmed the reaction was both spontaneous and endothermic. After six cycles of adsorption/desorption, the CMC/PVA-LA35 and CMC/PVA-LH35 maintained outstanding reusability with efficiencies of 76.72% and 81.69% for Cu(II) and 71.33% and 67.32% for Zn(II), respectively. DFT calculations revealed effective metal-ligand interactions via charge transfer and reduced bandgap. These findings were consistent with the large experimental adsorption capacities and confirm the importance of chemisorption for Cu(II) and Zn(II) removal. These findings reveal that metal chelation strength and complexation control the adsorption process. The results of the cost-effectiveness analysis showed that the total cost of reusability was extremely low. This discovery unveils its potential use in water desalination, offering new bio-composites to decrease metal contamination and protect aquatic life. Download: Download high-res image (171KB) Download: Download full-size image
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2026
·
IF 3.1
Lifeng Yang,Yirun Yang,Yi Zhu,Huajiang Zuo,Dongmei Deng
Cu(II) contamination in industrial wastewater constitutes a major challenge to global environmental management as traditional treatment methods are plagued by high energy consumption, secondary pollution risks, and substantial costs. A technical strategy was developed to prepare glutaraldehyde-crosslinked sodium alginate-zeolite (SA-HZ/GA) composite adsorption membranes via phase inversion. This approach leverages zeolites' structural reinforcement and mass transfer channel formation combined with glutaraldehyde's crosslinking properties to optimize material performance. SA-HZ/GA features abundant mesopores with sizes ranging from 2 to 16 nm and exhibits fracture strength over 74% higher than pure sodium alginate membranes. At pH 5 and 25°C, its Cu(II) adsorption capacity reaches 46.80 mg/g with over 80% removal efficiency maintained after 5 cycles with 0.1 M HCl as desorbent. The adsorption process fits the Langmuir model ( R 2 = 0.999) and follows pseudo-second-order kinetics, indicating monolayer chemical adsorption. Thermodynamic analysis revealed that the adsorption was spontaneous (Δ G = −12.5 kJ/mol) and endothermic (Δ H = 28.4 kJ/mol), with a positive entropy change (Δ S = 0.14 kJ/(mol·K)) suggesting increased randomness at the solid–liquid interface. This work provides an efficient, stable, and cost-effective engineering solution for heavy metal-laden wastewater treatment.
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DOI
高影响因子
ChemistrySelect
·
2026
·Vol. 11
·期 20
·e73532
·
IF 2.3
Siyu Mao,Yaqi Fu,Jiaxing Wei,Yichuan Wang,Wei Feng
Manganese superoxide dismutase (SOD) catalyzes the decomposition of hydrogen peroxide (H 2 O 2 ) to generate hydroxyl radicals (•OH). In this study, SOD was encapsulated via coordination with Cu(II), Fe(II), and phosphate in phosphate-buffered saline (PBS) to form a hybrid material denoted as SOD@Cu&Fe&PO 4 . Our study demonstrates that SOD and the coordinated Cu(II)/Fe(II) ions exert a synergistic catalytic effect on •OH generation during H 2 O 2 decomposition. This synergistic behavior stems from the dynamic interplay between the production and consumption of superoxide anion radicals (O 2 •− ). Specifically, O 2 •− is generated as an intermediate in the reactions of coordinated Cu(II) and Fe(II) with H 2 O 2 . The in situ generated O 2 •− is subsequently utilized by encapsulated SOD, which in turn reduces Mn 3 + at the enzyme's active site to Mn 2 + . A continuous supply of O 2 •− to SOD accelerates the Mn 3 + /Mn 2 + redox cycle at its active center. Concurrently, the timely removal of O 2 •− from the Cu(II)/Fe(II)–H 2 O 2 reaction system eliminates the potential inhibition of O 2 •− accumulation, thereby promoting the Fe(III)/Fe(II) and Cu(II)/Cu(I) redox cycles. As a result, SOD@Cu&Fe&PO 4 affords a significantly enhanced •OH generation capacity. Moreover, this hybrid material exhibits enhanced contaminant degradation efficiency and potent antibacterial activity against multidrug-resistant Escherichia coli (MDR E. coli ) and methicillin-resistant Staphylococcus aureus (MRSA). Graphical O 2 •− is generated as an intermediate in the reactions of coordinated Cu(II) and Fe(II) with H 2 O 2 . The in situ generated O 2 •− is subsequently utilized by encapsulated SOD, which in turn reduces Mn 3 + at the enzyme's active site to Mn 2 + . A continuous supply of O 2 •− to SOD accelerates the Mn 3 + /Mn 2 + redox cycle at its active center.
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DOI
高影响因子
Polymers
·
2016
·Vol. 8
·期 4
·78
·
IF 2.944
Sheng Chen,Rui Ding,Xiuling Ma,Liqun Xue,Xiuzhu Lin,Xiaoping Fan,Zhimin Luo
In this article, reduced graphene oxide (RGO)/carboxymethyl chitosan (CMC) composites (RGO/CMC) were synthesized by a hydrothermal method throughin-situreduction and modification of graphene oxide (GO) in the presence of CMC. An electrochemical sensor for the determination of Cu(II) by differential pulse anodic stripping voltammetry (DPASV) was constructed by an electrode modified with RGO/CMC. The fabricated electrochemical sensor shows a linear range of 0.02–1.2 μmol·L−1, a detection limit of 3.25 nmol·L−1(S/N = 3) and a sensitivity of 130.75 μA·μmol·L−1·cm−2, indicating the sensor has an excellent detection performance for Cu(II).Keywords:graphene;carboxymethyl chitosan;sensor;differential pulse anodic stripping voltammetry;Cu(II)
研究领域:
材料科学
·
环境科学
·
分析化学
✓ 已验证
DOI
PubMed
高影响因子
ELECTROANALYSIS
·
2019
·Vol. 31
·期 8
·1448-1457
·
IF 2.691
Fan Bai,Xinhao Zhang,Xinmei Hou,Huijuan Liu,Junhong Chen,Tao Yang
Amino-functionalized Fe 3 O 4 @carbon microspheres (NH 2 −Fe 3 O 4 @C) were prepared and the electrochemical sensor was constructed using NH 2 −Fe 3 O 4 @C modified glassy carbon electrodes (GCE) to determine toxic heavy metals in aqueous solution. Scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) were used to characterize the structure and phase of NH 2 −Fe 3 O 4 @C. Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) results indicate that NH 2 −Fe 3 O 4 @C modified GCE possesses large active area and excellent electron transfer. Under optimized electrochemical condition, Cd(II), Pb(II) and Cu(II) were determined using NH 2 −Fe 3 O 4 @C modified GCE. The electrode through amino functionalization exhibits higher sensitivity and lower detection limit toward Cd(II) and Cu(II) due to the acid-base pairing interaction between the electron-rich −NH 2 ligand and the electron-deficient heavy metal ions. Compared with other similar results reported in the literature, the NH 2 −Fe 3 O 4 @C modified electrode exhibits wider linear response range while with comparable lower detection limit. It also exhibits excellent stability, reproducibility and anti-interference ability.
研究领域:
分析化学
·
环境科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）