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
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绿色化学
·
有机合成
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DOI
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
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
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生物电化学
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废水处理
·
能源回收
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DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Lei Zhang,Qimei Li,Jiaqi Zhu,Heng Liu,Xueling Liu,Yi Wang,Guozhi Fan,Yanjun Huang,Likun Li
In this study, a novel composite bead (MPB-ALG) was prepared by encapsulating H 2 O 2 modified peanut shell-derived biochar (MPB) into alginate matrix through a facile method. The structure and properties of prepared materials were characterized using FTIR , BET, SEM, and XPS . Batch adsorption experiments were performed to compare the Cu(II) adsorption performance of MPB, plain alginate beads (ALG), and MPB-ALG. The effect parameters of the components, solution pH, contact time, initial concentration, and coexisting ions were studied systematically. The results showed that the maximum adsorption capacity of the optimized MPB-ALG-1 (MPB/alginate = 1:1 w/w%) was 117.4 mg g −1 at pH 5, which was much higher than that of MPB (37.4 mg g −1 ). The adsorption kinetics and isotherms data of Cu(II) on MPB-ALG-1 were well described by Elovich kinetic model and Freundlich adsorption isotherm. Compared with plain ALG beads, MPB-ALG-1 exhibited better reusability and anti-interference of coexisting ions. Finally, the adsorption mechanisms of Cu(II) on MPB-ALG-1 beads were revealed by FTIR and XPS analysis. The experimental results demonstrated that MPB-ALG-1 beads can be used as an environmentally friendly and efficient adsorbent for the removal of Cu(II) from wastewater.
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2023
·
IF 15.1
Ping Zhang,Mingxue Xiang,Wei Jiang,Huiling Liu,Yu Chen,Ying Fang,Longyong Wu,Hongjun Guo,Yufei Wang
Integrated adsorption and photocatalysis is a worth frontier strategy for recalcitrant organics elimination, yet the current challenge is developing materials featured with dual functions of adsorption/photocatalytic ability. In this scenario, a novel attractive exfoliated vermiculite coupling with Cu(II) composite (eVT@Cu) was tactfully engineered. Specifically, exfoliated structure containing vast negative charge was conductive for Cu(II) loading. The anchored Cu(II) played triple roles in this system, that is, regulating electron configuration of photocatalyst with narrow bandgap, as well as providing complexation sites for tetracycline (TC) enrichment. With the help of inherent Fe(III), Cu(II) was readily to form heterogeneous high-valence Cu(III) driven by photonic energy. Benefited by these effects, eVT@Cu exhibited extremely augment on TC removal compared to pristine VT and eVT, with ca. 80% removal efficiency through the synergy of adsorption and photocatalysis. Overall, this study not only provides an excellent environmental candidate for TC removal but also opens a brand-new perspective for the generation of heterogeneous high-valence Cu(III) over eVT@Cu under visible light.
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2022
·
IF 8.025
HuiQiang Zeng,HongYing Hao,Xuhong Wang,Ziqiang Shao
Utilizing natural and renewable natural polysaccharides as substrates to fabricate films or spinning with high metal ion adsorption and retain their mechanical properties is essential but challenging for the treatment of polluted water systems. In this study, the adsorption film was prepared with excellent mechanical properties and adsorption properties by blending chitosan (CS), poly (vinyl pyrrolidone) (PVP), β-cyclodextrin (β-CD), and nanocellulose (NCC). Fourier transform infrared spectroscopy , X-ray diffraction analysis, and scanning electron microscopy were used to investigate the microstructure of the film. The effects of the NCC content, contact time, temperature, initial concentration, and pH on the adsorption of Cu(II) ion were investigated. X-ray photoelectron spectroscopy (XPS) was used to explore the adsorption mechanism. The results showed that a suitable content of NCC enhanced the tensile strength of the CS/PVP/β-CD/NCC composite film and improved its adsorption capacity under acidic conditions. The adsorption kinetics followed the pseudo-second-order kinetic model and the equilibrium data could be better described by the Langmuir isotherm. The thermodynamic parameters indicated that the adsorption of the Cu(II) ion onto the CS/PVP/β-CD/NCC film exhibited physical adsorption and spontaneous process. XPS analysis showed that the nitrogen-containing functional groups play an important role during the adsorption process. Therefore, applying this adsorbent to remove metal ions during wastewater treatment is promising.
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DOI
PubMed
高影响因子
Materials Chemistry Frontiers
·
2022
·Vol. 6
·期 13
·1779-1787
·
IF 8.683
Xiaoming An,Jie Liu,Jia-Han Zhang,Xinxin Huang,Tangsong Zhu,Hongping Yan,Xudong Jia,Qiuhong Zhang
Elastomers possessing good mechanical strength and self-healing capability are showing great importance in stretchable electronics, since they can play the role of robust substrates for devices, and prolong the service life of devices. However, it is hard to balance the trade-off between the high mechanical strength and self-healing ability. Here we propose the synergetic strategy via combining thio-β-diketone-Cu2+ metal–ligand (M–L) coordination with hydrogen bonds in one system, through which high mechanical strength, good elasticity and self-healing ability are achieved. The elastomer displays excellent mechanical performances (with a fracture strength of 4.35 MPa and a fracture strain of 3400%). Meanwhile, the elastomer can realize a high self-healing efficiency (94%) within only 3 hours at 80 °C. X-ray absorption fine structure (XAFS) analysis demonstrates the reconfiguration of M–L coordination at the molecular level, and small angle X-ray scattering (SAXS) during stretching demonstrates the microphase structure change of the polymer at the nanoscale level. Based on the elastomer, a self-healable pressure sensor and a self-healable strain sensor are fabricated.
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高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2022
·
IF 3.841
Aihong Yang,Wenjing Liu,Xiangyu Li,Wanru Wu,Xiaodi Kou,Rui Shen
More and more evidence suggested that bio-metals including iron, zinc and copper play an important role in Alzheimer's disease (AD). Metal chelation agents may play an important role through promoting the metal homeostasis for AD treatment. In this study, UA (usnic acid), a natural product with antioxidant activity and metal chelation sites was selected as a lead compound. Different types of tertiary amine groups were introduced to synthesize four UA derivatives 1–4 as metal chelators and cholinesterase inhibitors since tertiary amine moiety was the key pharmacophore to inhibit cholinesterase. And the related activities such as antioxidant, anti-cholinesterase and metal chelation were evaluated. Results showed that 1–4 displayed excellent anti-oxidant activity, with lowest IC 50 of 0.433 µM for ·OH scavenging ability and 8.808 µM for ·O 2 − scavenging ability. The mechanisms of anti-oxidant activities were furtherly studied by cyclic voltammetry. Besides, 1–4 also showed good anti-cholinesterase activities with lowest IC 50 of 0.269 µM for acetylcholinesterase (AChE) and 0.361 µM for butyrylcholinesterase (BuChE). The results of molecular docking with AChE and BuChE were consistent with the experimental results. 1–4 displayed obvious chelating abilities with Cu(II) and Fe(III) by UV–vis spectra analysis and the metal complexes also showed good anti-AD activities. Interestingly, single crystal of Cu(II) complex of the hydrolyzed mono-substituted ligand was obtained which further substantiated the metal binding ability and provided clues to the anti-AD activities of the metal complex. Meanwhile, hydrolysis ratio of 4 was also tested by HPLC. Finally, BBB permeability of 1–4 was acceptable by ADMET prediction. Overall, these findings demonstrated that compounds 1–4 might be considered as potential candidates in the anti-AD therapy.
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高影响因子
CELLULOSE
·
2022
·Vol. 29
·期 2
·1003-1015
·
IF 6.123
Xiao Yuanxiang,Shen Guokang,Zheng Weishi,Fu Jiajia,Fu Feiya,Hu Xinyue,Jin Ziyi,Liu Xiangdong
We report here a simple and effective method applying a combination of chitosan (Cs) and Cu(II) ion to fabricate antibacterial cotton fabric with a remarkable durability against laundering. The antibacterial fabric was prepared by grafting Cs onto cotton fibers through a succinic acid linkage, following with loading Cu(II) ions by the coordination effect. The modified fabric achieved 100% bacterial reduction (BR) rates against both S. aureus and E. coli , and remarkable laundering durability was confirmed even after 100 washing cycles. Moreover, longer Cs chains grafted on fibers shown enhanced chelating capability with Cu(II) ions. When compared to copper nanoparticles, our strategy has advantages in terms of low dosage of Cu(II), reasonable cost, simple process, reduced environmental hazards, and improved antibacterial durability. This work is believed to be a practical strategy for developing environment-friendly and cost-effective long-acting antibacterial cotton textiles.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Yaoyao Zhang,Shikui Jia,Xinqiang Yuan,Liu Ding,Taotao Ai,Kangze Yuan,Wei Wang,Luca Magagnin,Zhenyi Jiang
In this work, a novel adsorbent was evaluated for eliminating heavy metal ions from water. The cyano-functionalized silica aerogels (ANSA-X) were fabricated by functionalizing silica aerogel with 2-cyanoethyltriethoxysilane, and then further by the reaction with hydroxylamine hydrochloride to obtain amidoxime-functionalized silica aerogels (AOSA-X) with a large specific surface area. The FTIR and NMR analysis indicated that cyano was successfully transformed into amidoxime groups. Adsorption experiments showed the adsorption performed well with the Langmuir isotherm, and AOSA3 exhibited the optimum adsorption property with 598.05 mg/g for Pb (II) and 534.10 mg/g for Cu (II). The thermodynamic results indicated that spontaneous endothermic process was the nature of the adsorption. The adsorption rate of AOSA3 was above 86% after five successive adsorption–desorption cycles. XPS analysis and DFT calculations demonstrated that the N and O atoms participated in the chelating adsorption of Pb (II) and Cu (II), and the N atom on the amidoxime groups played a dominant role. Life Cycle Analysis (LCA) evaluated the environmental effect of the preparation of 1 kg AOSA3 adsorbent, identified the environmental factors with high environmental impact, proposed alternative solutions, proved the feasibility of preparing a novel high-efficiency amidoxime-based adsorbent, and provided a guideline for the sustainable mass production of AOSA3 adsorbent. In conclusion, AOSA3 demonstrated to have promising application perspectives in heavy metal effluent treatment.
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高影响因子
EUROPEAN JOURNAL OF MEDICINAL CHEMISTRY
·
2021
·
IF 6.514
Wen-Ying Shen,Chun-Peng Jia,An-Na Mo,Hong Liang,Zhen-Feng Chen
Three Cu(II) complexes of quinoline derivatives as cancer chemodynamic therapy agents were synthesized and characterized. These complexes were heavily taken up by cells and reacted with cellular glutathione (GSH) to reduce Cu 2+ to Fenton-like Cu + , which catalyzed endogenous H 2 O 2 to produce the highly toxic hydroxyl radicals (•OH) to kill cancer cells. Cu1 and Cu2 initiated CAT activity declines, mitochondrial membrane potential and ATP concentration decrease, mitochondrial Ca 2+ overload and ER stress response, leading to cell cycle arrest in sub-G1 and cancer cell caspase-dependent apoptosis . On account of the high GSH and H 2 O 2 specific properties of the tumor microenvironment , Cu1 and Cu2 exhibited higher in vitro anticancer activity and lower toxicity to normal cells. Cu1 and Cu2 efficiently inhibited tumor growth in the SK-OV-3 xenograft mouse model without obvious systemic toxicity.
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DOI
PubMed
高影响因子
SOLVENT EXTRACTION AND ION EXCHANGE
·
2023
·
IF 2
Dong Cao,Shuai Wang,Xin Ma,Jia Yang,Hong Zhong
Herein, a novel C=O–NOH-contained compound was synthesized and used in the extraction and recovery of copper from sulfate solution. Dodecyl phenyl ethyl hydroxamic acid (DPEHA) exhibited high selectivity to Cu(II) over the competing ions, and the separation factors (β) obtained were βCu/Zn = 227.370, βCu/Co = 199.094, βCu/Ni = 188.889, respectively. The separation effect was stronger than that of 2-hydroxy-5-nonyl acetophenone oxime. Meanwhile, extraction capacity of 0.10 g Cu(II) per gram DPEHA was reached, and the extracted Cu(II) can be stripped effectively. The investigation of extraction mechanism revealed that O atoms in C=O and O-H groups of DPEHA operate as active sites, which could powerfully chelate with Cu(II) by forming stable five-membered rings. The high copper extraction efficiency and selectivity associated with a simple synthesis of DPEHA make it to serve as the potential selective Cu(II) extractant, which also provide a novel insight for the research and development of economical Cu(II) extractants.
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高影响因子
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