COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2018
·
IF 2.829
Min Wang,Xiong Li,Tonghui Zhang,Li Deng,Peiyun Li,Xuefen Wang,Benjamin S. Hsiao
A thorough cleanup of heavy metal ions in water bodies is of vital importance for the urgent requirement of clean potable water. In this study, combining the prominent structural characteristics of electrospun nanofibers and the special property of hydrogels, we developed a green strategy to construct an eco-friendly poly(acrylic acid)-sodium alginate nanofibrous hydrogels (PAA-SA NFHs) by electrospinning PAA-SA nanofibers, and followed by a facile thermal cross-linking treatment. The resultant PAA-SA NFHs with high swelling ratio, intrinsic fiber morphology, excellent stability and satisfactory mechanical performances exhibited prominent adsorption performances towards Cu 2+ (q m = 591.7 mg/g) and outstanding regenerability. Notably, by virtue of the synergy of porous network structure, superhydrophilicity and faster adsorption rate, such PAA-SA NFHs membrane permitted extremely high water permeation flux solely driven by gravity (up to 868.5 L m −2 h −1 ) and remarkable removal efficiency, when acted as a free-standing filter for the dynamic removal of Cu 2+ . Furthermore, we also demonstrated a sustainable strategy of converting the toxic Cu 2+ pollutants to valuable Cu nanoparticles for imparting additional functionality of catalysis, and the resultant PAA-SA NFHs with uniformly distributed Cu nanoparticles possessed an excellent catalytic activity. Consequently, constructing such attractive PAA-SA NFHs will provide new insights into the design and exploitation of novel adsorbents or filters for the practical water purification, and to recycle metals (copper and potentially others) for keeping the resources sustainable.
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2018
·
IF 5.667
Lin Liu,Dehua Deng,Yiru Wang,Kewei Song,Ziling Shang,Qiao Wang,Ning Xia,Bing Zhang
We developed a colorimetric method for assay of protease activity through the growth of gold nanoparticles (AuNPs) with ascorbic acid (AA) as the reducing agent. The method is based on the difference in the catalytic activity of various Cu 2+ species toward AA oxidation. A mutational peptide is employed as the protease substrate, in which only one amino acid residue is replaced by the histidine residue. Specifically, HAuCl 4 can be reduced into AuNPs by AA; Cu 2+ ion promotes the oxidation of AA under oxygen atmosphere by a redox cycling, thus preventing the formation of AuNPs. Cleavage of the substrate peptide results in the exposure of an amino terminal Cu 2+ and Ni 2+ -binding (ATCUN) motif in the NH 2 -terminus of one fragment. The resultant ATCUN peptide can sequestrate Cu 2+ and thus depress the catalytic oxidation of AA. The consumption of AA is monitored by UV–vis spectra and differential pulse voltammetry. The high extinction coefficient of the generated AuNPs enables the quantitative and sensitive colorimetric analysis of protease. To demonstrate the analytical performances, β-secretase was tested as a model protease. By employing peptide-functionalized magnetic beads, β-secretase in serum was determined with a satisfactory result. This work provides valuable information for designing of novel protease biosensors.
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS & DESIGN
·
2016
·
IF 3.997
Tianlin Zhang,Xiadan Yue,Keren Zhang,Jinghao Li,Caiyian Zhu,Lei Zhang,Wei Chen
A polymerizable complex of copper(II) ion with unsaturated quaternary ammonium cation-modified salicylaldoxime ligand was prepared and used to synthesize a novel copper(II) ion imprinted polymers (Cu(II)-IIPs). Elemental analysis (EA), Fourier transform infrared spectroscopy (FTIR), and NMR spectroscopy confirmed the structures of the polymerizable complex and Cu(II)-IIPs. Thermogravimetric analysis (TGA), Brunauer–Emmett–Teller surface area analysis (BET), and scanning electron microscopy (SEM) characterized physical properties and morphologies of synthesized metal complex and corresponding polymers. The effect of pH, contact time, and initial Cu 2 + and SO 4 2 − concentration on the simultaneous adsorption of Cu 2 + and SO 4 2 − ions of Cu(II)-IIPs were investigated. Cu(II)-IIPs showed high hydrophilicity and simultaneously rapid adsorption of Cu 2 + and SO 4 2 − from solution. Moreover, Cu(II)-IIPs displayed highest adsorption capacity in the pH range of 5.0–6.5, the separation factor ( β ) between Cu 2 + with respect to Fe 3 + was 1866, the equilibrium adsorption capacities for Cu 2 + and SO 4 2 − were almost the same and close to 0.13 mmol g − 1 at 25 °C. Stripping experiments revealed that 1.5 mol L − 1 H 2 SO 4 was an effective eluent for desorbing copper (II) ions from Cu(II)-IIPs. In additional, Cu(II)-IIPs exhibited good recyclability and reusability for 5 cycles without deterioration of its selective ion-absorbing capacity.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Tianxin Gu,Songwen He,Jianxin Yi,Qianwei Liang,Hanjin Luo
Heavy metals in industries such as electroplating plants and semiconductor industries usually exist in the form of heavy metal organic complexes, and the removal of heavy metal organic complexes is troubled by the difficulty of decomplexation as well as the complexity of the treatment process of the free heavy metal ions after decomplexation. In this study, we proposed a synergistic strategy for the removal and secondary utilization of Cu(II) organic complexes (Cu-EDTA) in wastewater through mixed pyrolysis of carbon nitride precursor and Cu-EDTA, and the resulted product was used for the efficient degradation of tetracycline (TC). The unique electronic structure of carbon nitride and abundant surface defects anchor Cu during pyrolysis, which effectively realizes the removal of Cu-EDTA from wastewater. In addition, the Cu and O co-doped carbon nitride (Cu/O-CN) catalyst constructed by this strategy was proved to be effective in peroxydisulfate activation TC degradation, with a removal efficiency of 91.5% in 20 min, a degradation rate of 0.1643 min −1 , and a TOC removal efficiency of 53%. X-ray Photoelectron Spectroscopy (XPS) and density functional theory (DFT) calculation revealed Cu + active center constructed by the strong metal support interaction between Cu and carbon nitride in Cu/O-CN and the 1 O 2 dominated nonradical degradation pathways of TC. This study demonstrated a synergistic strategy for the efficient removal and secondary utilization of Cu-EDTA in wastewater, providing new insights into the use of environmentally friendly and cost-effective methods for the removal and recovery of heavy metal organic complexes from wastewater.
✓ 已验证
产品关联
DOI
高影响因子
Biomaterials Advances
·
2025
·
IF 6
Lei Wang,Huainian Wang,Haoming Dang,Baolong Niu,Hong Yan,Ruijie Guo,Huifang Wang,Pucha Zhou
Effective wound dressings play an important role in preventing infections and promoting wound healing. Most polysaccharide-based hydrogel dressings have the drawbacks of weak tissue adhesion and poor antibacterial properties. Herein, a multifunctional dopamine-grafted oxidized sodium alginate-methacrylated carboxymethyl chitosan/gallic acid‑copper(II) complex (OD-CM/GA-Cu II UV ) hydrogel was fabricated through Schiff base bonds and photo-crosslinked polymerization between dopamine-grafted oxidized sodium alginate (OSA-DA) and methacrylated carboxymethyl chitosan (CMC-MA), with the integration of gallic acid‑copper(II) complexes (GA-Cu II ). The double cross-linked network and mussel-inspired adhesion mechanism endowed the hydrogel with attractive physicochemical properties, including excellent self-healing properties, pH-responsive biodegradability, robust toughness, and a maximum adhesion strength of 15.06 kPa. Moreover, the composite hydrogel exhibited an antibacterial ratio of > 99 % against Escherichia coli and Staphylococcus aureus , as well as good antioxidant activity. The MTT assay showed that the cell viability of the composite hydrogel reached > 85 %. The in vivo full-thickness skin defect healing assays in rats demonstrated that the composite hydrogel remarkably accelerated wound repair by attenuating the inflammatory response and promoting epithelial tissue remodeling. Therefore, this novel multifunctional hydrogel has potential applications in biomedical wound dressing.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Xiuxian Zhao,Yuhan Fang,Liang Xue,Yizhong Lu,Riming Hu,Jiayuan Yu,Xuchuan Jiang,Junhua Sun
Efficient removal of Pb(II) and Cu(II) from wastewater is crucial for safeguarding environmental safety and public health. Biomass-based adsorbents with surface-specific functionality hold great promise for selective adsorption of metal cations. In this study, a novel phosphorylated chitosan-lignin (PCSL) composite is successfully synthesized via Mannich reaction. The PCSL exhibits remarkable selectivity in the adsorption of Pb(II) and Cu(II), as evidenced by Density Functional Theory (DFT) calculations. Furthermore, DFT analysis reveals that the incorporation of phosphate groups significantly enhances the chelation capacity of the adsorbent towards heavy metals. The PCSL demonstrates ultrafast adsorption capabilities for Pb(II) and Cu(II). Specifically, the adsorption processes reach equilibrium within 7 min and 5 min, respectively, with maximum adsorption capacities of 207.9 mg·g −1 for Pb(II) and 100.0 mg·g −1 for Cu(II). X-ray photoelectron spectroscopy analysis indicates that the adsorption mechanisms involve both chemical complexation and electrostatic attraction. Notably, the adsorbent can be recycled many times, and the spent Cu-PCSL, upon pyrolysis treatment, demonstrate remarkable catalytic activity in nitrate reduction reactions, with Faradaic efficiencies as high as 98.3 % and NH 3 yield of 4.3 mg·h −1 ·mg cat. −1 . This work not only advances the progression of biomass adsorbents but also demonstrates considerable industrial potential in mitigating water pollution and promoting sustainable development.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2024
·
IF 3.7
Huang Pei-Pei,Wu Ting-Ting,Tuo Meng-Qi,Zhang Rui-Ying,Shuai Chun-Jiang,Liu Bo,Song Juan,Zhang Sheng-Rui,Lu Jiu-Fu
In the field of water decontamination, the design of luminance sensor for sensitive detection of heavy metal ion toxic and nitroaromatic compounds are important and challenging. Herein, a new luminescent Cd(II) metal–organic framework (MOF), {[Cd 2 (H 2 O) 3 (4-CPCA) 2 ]·2H 2 O} n ( SNUT-27 ) (H 2 (4-CPCA) = 1-(4-carboxyphenyl)-4-oxo-1,4-dihydropyridazine-3-carboxylic acid) was obtained by the reaction of flexible ligand H 2 (4-CPCA) and Cd(II) ions, characterized by single crystal X-ray diffraction, PXRD, FT-IR, and TGA, the samples were further analyzed. The analysis of single crystal X-ray diffraction showed that SNUT-27 possesses a distinct three-dimensional spatial arrangement and demonstrates impressive fluorescence properties. Particularly, SNUT-27 showed a highly sensitive response to the nitro-aromatic compounds nitrobenzene by fluorescence quenching, and in contrast, showed a fluorescence enhancement response to Al 3+ and Cu 2+ . SNUT-27 can be effortlessly recycled by simply rinsing with water post-sensing experiments, showcasing its reusability. Additionally, potential detection mechanisms have been explored.
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Chenglong Bao,Fengyu Wu,Fan Wang,Longyu Qiu,Menggang Li,Depeng Zhao,Yongsheng Yu,Weiwei Yang
The development of efficient heterogeneous catalysts for copper-catalyzed azide-alkyne cycloaddition (CuAAC) is crucial for overcoming the limitations of homogeneous systems, such as poor recyclability and catalyst leaching. In this study, we report the synthesis of nanosized hollow Cu(I)/Cu(II)-metal-organic frameworks (Nano-hollow Cu(I)/Cu(II)-MOF). The paddlewheel Cu(II) sites persist as robust structural nodes, while partial reduction engenders catalytically active planar tetranuclear Cu(I) sites strategically embedded within the framework. This unique architecture endowed Nano-hollow Cu(I)/Cu(II)-MOF with remarkable catalytic activity, achieving a turnover frequency (TOF) of 456.9 h −1 over 10 min for the CuAAC reaction between phenylacetylene and benzyl azide with a TOF 1.66-fold higher than the nanosphere control, underscoring the hollow structure's advantages. Moreover, the catalyst also demonstrated exceptional recyclability, maintaining a nearly constant catalytic conversion rate over 6 cycles. Theoretical calculations unveiled a dual‑copper synergistic mechanism, wherein coordinated charge redistribution mediated by both copper sites significantly lowered the activation barrier. The alkyne dehydrogenation is identified as the rate-determining step with a theoretical overpotential of 0.82 eV, which was pivotal for enhancing reaction efficiency. Beyond conventional catalysis, the Nano-hollow Cu(I)/Cu(II)-MOF exhibited versatile applicability, including rapid fluorescent molecule synthesis with a rate constant (k Flu ) of 0.1 min −1 and efficient DNA-templated ligation reactions with an apparent rate constant (k obs ) of 0.21 s −1 .
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Shiwei Xie,Wei Shao,Hui Zhan,Zheng Wang,Chengcheng Ge,Qingjie Li,Wenjing Fu
The widely usage of ethylenediaminetetraacetic acid (EDTA) arises environmental concerns on toxic metal mobilization, and challenges the conventional processes in water treatment. In the study Cu(II)-EDTA in near natural water was efficiently removed during a two-step electrocoagulation using Fe(0) anode (Fe-EC), including a transformation to Fe(III)-EDTA induced mainly by structural Fe(II) in anoxic Fe-EC and further degradation in oxic Fe-EC. The degradation of Fe(III)-EDTA was mostly attributed to an oxygen activation mechanism that involving O 2 − and hydroxyl radical ( OH) generation, as validated by the quenching experiments and electron spin resonance. Furthermore, O 2 − generated during Fe(II) oxidation took a dominant role on Fe(III)/Fe(II)-EDTA transformation instead of electrochemical reduction. Six intermediates during the Fe(III)-EDTA degradation were identified by LC-Q-TOF, indicating a pathway of stepwise breakage of N C bonds. The results revealed in this work is helpful to understand the contribution and fate of EDTA during Fe-EC treatment of metal-EDTA polluted water.
✓ 已验证
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2017
·
IF 3.671
Yuvaraja Gutha,Yaping Zhang,Weijiang Zhang,Xu Jiao
Metal ions cause a serious public health problem. It is a great challenge to find an effective and efficient adsorbent to remove heavy metals from wastewater. Chitosan-based adsorbents are potential and effective for heavy metal ion removal. Hence a novel m-ECCSB was synthesized, characterized and utilized as an adsorbent for the removal of Cu(II) ions from aqueous solution. Various factors affecting the uptake behavior such as pH, adsorbent dosage, contact time, initial concentration of Cu(II) and temperature effect were investigated. Maximum adsorption capability (123.10 mg/g) was obtained at pH = 6, adsorbent dose of = 250 mg, rotational speed = 200 rpm, contact time = 60 min, and temperature of 323 K. The result of the kinetic study shows that the adsorption of Cu(II) could be described by the pseudo-second-order equation. Equilibrium data were analysed with the Langmuir, Freundlich and Dubinin-Radushkevich isotherms and Langmuir model was found to provide the best fit of the experimental data. The thermodynamic parameters showed that the adsorption of Cu(II) onto m-ECCSB was spontaneous (ΔG° = −8.990, −10.00 and −10.593 kJ/mol), endothermic (ΔH° = 15.674, 15.478 and 15.699 kJ/mol) and ΔS° (0.0814 J/mol K) suggests an increased randomness at the solid/solution interface under the studied conditions.
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 42
·21029-21038
·
IF 9.931
Liang Zhang,Jing Wang,Xinyi Ren,Wentao Zhang,Tianshu Zhang,Xinnan Liu,Ting Du,Tao Li,Jianlong Wang
The excessive accumulation of toxic copper species makes it imperative to develop smart dual-functional materials for the simultaneous removal and detection of Cu(II) in drinking water. In this work, novel core–shell NH2-MIL-101(Al)@ZIF-8 nanoflowers were successfully fabricated via an internal extended growth mode under the regulation of polyvinylpyrrolidone (PVP) to achieve this goal. Benefiting from the specific affinity of imidazole nitrogen in ZIF-8 toward Cu(II), the resultant NH2-MIL-101(Al)@ZIF-8 shows high adsorption capacity (526.74 mg g−1). Moreover, the fluorescence of NH2-MIL-101(Al) shows a Cu(II)-dependent change, causing this composite to possess superior selective/sensitive detection with a broad linear range (1.5–625 μM) and a low detection limit (0.17 μM) for Cu(II). Specifically, the hybrid MOF@MOF structure provides greater sensitivity as compared to the individual constituent (pristine NH2-MIL-101(Al)) and the mixed state, which is ascribed to the rational optimization of the smart adsorbent based on the following two aspects. (i) The synergistic effect of the core–shell nanostructure improves the preconcentration ability at the interface between single MOFs. (ii) The existence of the three-dimensional hierarchical nanoflower architecture (structure optimization) accelerates the mass transport and sculpts the final composite with enhanced adsorption and detection ability. These indicate that the smart NH2-MIL-101(Al)@ZIF-8 nanoflower could be an excellent candidate for the synchronous remediation and selective detection of Cu(II) in aqueous systems, which could be potentially useful in wastewater treatment and water quality monitoring.
✓ 已验证
DOI
高影响因子
Frontiers in Marine Science
·
2021
·
IF 4.912
Han Xiaoxin,Wang Shiyu,Yu Xue,Vogt Rolf D.,Feng Jianfeng,Zhai Lifang,Ma Weiqi,Zhu Lin,Lu Xueqiang
Due to its small size, large specific surface area and hydrophobicity, microplastics, and the adsorbed contaminants may together cause potential negative effects on ecosystems and human beings. In this study, kinetics and size effects on adsorption of Cu(II), Cr(III), and Pb(II) onto PE, PP and PET microplastic particles were explored. Results indicated that the PE and PET microplastics have the higher adsorption capacity for Cu(II), Cr(III), and Pb(II) than that for PP microplastic. The adsorption capacity was affected by microplastic types and metal species. Among the three metals, Pb(II) had the largest adsorption amount on microplastic particles, especially on PET particles. Moreover, the adsorption capacities of microplastics increase with the decrease of particle size. The metal adsorption capacity of <0.9 mm microplastics is greater than that of 0.9–2 mm and 2–5 mm microplastics. The size effect on metal adsorption was largest for PE microplastic. More attention should be paid in case of the coexistence of heavy metals and tiny PE and PET microplastics in the environment.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）