JOURNAL OF MOLECULAR LIQUIDS
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2022
·
IF 6.633
Chaojian Zhang,Tianrui Yang,Junsheng Liu,Qianqian Duan,Jiahui Song,Youjun Yin,Hansong Wang
Novel poly(ethylene imine) (PEI) modified chitosan-based hybrid membranes (PMCHMs) were created via a soft chemistry method, in which unmodified chitosan (CS) firstly reacted with PEI to produce a CS-PEI precursor. Later, such CS-PEI precursor was blended with silicone to create the membrane solution of PMCHMs. Finally, PMCHMs could be obtained via phase-inversion process. Multi-component sorption of Pb 2+ , Cu 2+ and Ni 2+ on PMCHMs in metal mixed solutions, such as, Pb 2+ &Cu 2+ and Pb 2+ &Ni 2+ binary, Pb 2+ , Cu 2+ and Ni 2+ ternary, as well as Pb 2+ , Cu 2+ , Ni 2+ , Cd 2+ and Cr 3+ quintuple mixed solutions, was inspected. The calculation of effective diffusion coefficients, distribution coefficients and selectivity coefficients showed that Pb 2+ sorption on PMCHMs had excellent selectivity in these mixed multi-metal solutions. While, the calculation of activation energy proved that Pb 2+ , Cu 2+ and Ni 2+ sorption on PMCHMs was a physic-sorption process Also, mechanism insight reveals that Pb 2+ sorption on PMCHMs could be depicted via Lagergren pseudo-2nd-order kinetic model and Langmuir or Freundlich isotherm equation. Exclusively, intra-particle diffusion process was discussed in detail. Desorption testing verified that HCl is a good desorbent for metals sorption on PMCHMs and the cycle time of membranes can arrive at 6 times. These results demonstrate that PMCHMs can be used to preferentially eradicate Pb 2+ from metal mixture solutions, showing prospective applications in the treatment of metal mixture wastewater from waste vehicle power-battery and other various metal-bearing polluted water.
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高影响因子
DESALINATION
·
2022
·
IF 11.211
Yi-Xin Wang,Cheng-Ye Zhu,Jingliang Huang,Hao-Cheng Yang,Zhi-Kang Xu
Thin-film composite (TFC) membranes can find broad uses in desalination and wastewater treatment . However, industrialized interfacial polymerization involves many organic solvents and toxic monomers . An aqueous fabrication process can meet the standards of green and sustainable production, but fabricating defect-free thin films in a homogenous phase remains challenging. Herein, we fabricate a series of TFC nanofiltration membranes through a contra-diffusion process based on the cross-linking of metal ions and alginate . The film formation is confined at the ultrafiltration substrate surface due to the competition between reaction and restricted diffusion. Among a series of metal ion/alginate composites, the Cu 2+ /alginate composite membrane displays superior nanofiltration performance because of the strong affinity between Cu 2+ and alginate. The highly negatively charged membrane performs a high rejection to divalent anions and anionic dyes based on the Donnan effect . The effects of alginate concentration and diffusion time on membrane performance were investigated to achieve optimal fabrication conditions. The as-prepared membrane shows a rejection of 96.2% to Na 2 SO 4 with permeation flux around 50.2 L·m −2 ·h −1 under 0.6 MPa, and 99.5% to several dye molecules. Moreover, the membrane performs outstanding anti-fouling and anti-bacterial properties because of its excellent hydrophilicity and the existence of Cu 2+ .
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高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY
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2022
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IF 6.814
Guojuan Yan,Bo Kong,Jiaqiang Zhao,Huanhuan Ni,Lei Zhan,Chengzhi Huang,Hongyan Zou
The application of nanostructures to design fluorescence resonance energy transfer (FRET) based sensing platforms has been greatly concerned with the demand for sensitive and selective detection of biomolecules. Here, a novel sensitive turn-on fluorescence strategy based on the FRET mechanism has been designed for hyaluronidase (HAase) detection through the modulation of Cu 2-x Se@HA-Rh6G nanoprobe fabricated by self-assembly of rhodamine 6G (Rh6G) together with Cu 2-x Se@HA nanoparticles through electrostatic adsorption. The Cu 2-x Se@HA had extensive localized surface plasma resonance (LSPR) absorption in the wide range of ultraviolet (UV) to near-infrared (NIR) wavelengths and showed good light capture characteristics, which can be acted as good acceptors in the FRET interactions with Rh6G , inducing its efficient fluorescence quenching . In the presence of HAase, the FRET process was disrupted and the fluorescence signal was recovered. In the range of 0.1–10.0 U/mL, the fluorescence recovery of Rh6G showed a good linear relationship with the concentration of HAase, and the detection limit was 0.06 U/mL. The sensing platform has been used for HAase detection in real urine samples and cancer cells imaging.
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DOI
PubMed
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
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2022
·
IF 3.898
Guangyuan Chen,Tong Zhou,Meng Zhang,Zhongxiang Ding,Zhikun Zhou,Yuanhui Ji,Haiying Tang,Changsong Wang
Struvite (MAP) crystallization technology is widely used to treat ammonia nitrogen in waste effluents of its simple operation and good removal efficiency. However, the presence of heavy metal ions in the waste effluents causes problems such as slow crystallization rate and small crystal size, limiting the recovery rate and economic value of the MAP. The present study was conducted to investigate the effects of concentrations of three heavy metal ions (Cu 2+ , Zn 2+ , and Pb 2+ ) on the crystal morphology, crystal size, average growth rate, and crystallization kinetics of MAP. A relationship was established between the kinetic rate constant K t calculated by the chemical gradient model and the concentrations of heavy metal ions. The results showed that low concentrations of heavy metal ions in the solution created pits on the MAP surface, and high level of heavy metal ions generated flocs on the MAP surface, which were composed of metal hydroxides, thus inhibiting crystal growth. The crystal size, average growth rate, MAP crystallization rate, and kinetic rate constant K t decreased with the increase in heavy metal ion concentration. Moreover, the K t demonstrated a linear relationship with the heavy metal concentration ln( C / C* ), which provided a reference for the optimization of the MAP crystallization process in the presence of heavy metal ions.
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高影响因子
ACS Omega
·
2021
·
IF 3.512
Yida Huang,Youlong Liang,Chaoran Xie,Qingyuan Gui,Jinlei Ma,Hongxian Pan,Zeyu Tian,Lei Qi,Mei Yang
Ce1–xO2:x%Cu2+ nanobelts were bioinspired, designed, and fabricated using commercial filter papers as scaffolds by adding Cu(NO3)2 in the original sol solution of CeO2 nanobelts, which display excellent catalyst properties for CO oxidation and photocatalytic activity for organic dyes. Compared with pure CeO2, CuO belts were synthesized using the same method and the corresponding Ce0.5O2:50%Cu2+ bulk materials were synthesized without filter paper as scaffolds; the synthesized Ce1–xO2:x%Cu2+ nanobelts, especially Ce0.5O2:50%Cu2+ nanobelts, can decrease the reaction temperature of CO to CO2 at 100 °C with the conversion rate of 100%, much lower than the formerly reported kinds of Ce1–xO2:x%Cu2+ catalysts. Meanwhile, the synthesized Ce1–xO2:x%Cu2+ nanobelts also display better photocatalytic activity for organic dyes. All of these results provide useful information for the potential applications of the synthesized Ce1–xO2:x%Cu2+ nanobelts in catalyst fields.
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DOI
PubMed
高影响因子
Colloid and Interface Science Communications
·
2021
·
IF 4.914
Weichun Wu,Shenxi Min,Qin Tong,Junhao Wang,Jianghong Hu,Ashish Dhamsaniya,Anamik K. Shah,Vaibhav P. Mehta,Bin Dong,Bo Song
As the third most abundant trace element in human internal environment, Cu 2+ has a significant impact on organisms and ecosystems. The determination of Cu 2+ is an important topic in the field of environmental protection and food safety. In this study, a coumarin-based fluorescent probe (denoted by ICTAB) was designed and synthesized. The results indicate that ICTAB is a “turn-off” fluorescent probe for Cu 2+ , with extremely high selectivity and sensitivity. The limit of detection is down to 0.27 μM. Mass spectroscopy and Job's plot show that ICTAB and Cu 2+ form 2:1 coordinate complexes, and the specific binding sites of Cu 2+ on ICTAB were determined by FTIR and 1 H NMR. More importantly, the fluorescent emission of ICTAB can be repeatedly recovered by removing Cu 2+ with S 2− , which functions as an effective “turn-off” fluorescent probe. ICTAB demonstrated over 89% of recoveries as being applied in detecting Cu 2+ in water.
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高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2020
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IF 3.306
Fanyong Yan,Xiaodong Sun,Yan Zhang,Yingxia Jiang,Li Chen,Tengchuang Ma,Liang Chen
The form of a single response to a single target analyte limits the development of fluorescent probes . Here, a probe (HBTA) based on HBT (2-(2-Hydroxyphenyl)-benzothiazole) was synthesized to achieve a concept about nested probe, completing continuous detections. HBTA through low concentration Cu 2+ gives birth to a new probe (HBT-CHO) that can detect Cu 2+ by complexation and Cys by cyclization (HBT-Cys). These processes are accompanied by different fluorescent signal changes and can quantitatively detect Cys and Cu 2+ . Furthermore, HBT-CHO, HBT-Cys, and Cys can bind Cu 2+ , so competitive fluorescent response of Cu 2+ can take place through alternate addition of Cu 2+ and Cys. At this stage, the response becomes too complex to accurately quantify, but it is still dependable to predict changes in the content of the mixture system through competitive fluorescent changes. In summary, it is because of the existence of the nested pattern that HBTA completes multiple forms of responses to Cu 2+ and Cys.
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高影响因子
ACS Applied Materials & Interfaces
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2020
·
IF 8.758
Chen Jiao,Jianan Zhang,Tianqi Liu,Xin Peng,Huiliang Wang
Shape deformable hydrogels have drawn great attention due to their wide applications as soft actuators. Here we report a novel kind of mechanically strong, tough, and shape deformable poly(acrylamide-co-vinylimidazole) [poly(AAm-co-VI)] hydrogel prepared by photoinitiated copolymerization and the followed immersing in a Cu2+ aqueous solution. Strong Cu2+ complexation with imidazole groups dramatically enhances the mechanical properties of the hydrogels, whose tensile strength, elastic modulus, toughness, and fracture energy reach up to 7.7 ± 0.76 MPa, 15.4 ± 1.2 MPa, 23.2 ± 2.5 MJ m–3, and 22.1 ± 2.3 kJ m–2, respectively. More impressively, shape deformation (bending) can be easily achieved by coating Cu2+ solution on one side of hydrogel strips. Furthermore, precise control of the shape deformation from 1D to 2D and 2D to 3D can be achieved by adjusting Cu2+ concentration, coating time, region, and one or two side(s) of hydrogel samples. The Cu2+ complexation provides a simple way to simultaneously improve the mechanical properties of hydrogels and enable them with shape deformability. The mechanically strong, tough, and shape deformable hydrogels might be a promising candidate for soft actuators.
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PubMed
高影响因子
NANO
·
2020
·
IF 1.566
Dan Wang,Xinfeng Xiao,Bo Han,Weiming Ni,Yu Gao,Lin Li,Jianliang Xue
A series of UiO-66-PEI materials were obtained by impregnating UiO-66 with different amounts of polyethylenimine (PEI) with UiO-66 as the basic skeleton material. The materials were used as adsorbents to remove Ni 2 + and Cu 2 + from water. The prepared UiO-66-PEI-30 had good adsorption capacity on Ni 2 + and Cu 2 + at 30% PEI. The adsorption of Ni 2 + and Cu 2 + with UiO-66-PEI-30 was further studied. The role of eluent types, elution time, concentration and volume on the effect of Cu 2 + elution was investigated. The adsorption of Ni 2 + and Cu 2 + by UiO-66-PEI-30 followed the pseudo-second-order kinetic model and Langmuir adsorption model. The maximum adsorption capacities obtained by Langmuir fitting for Ni 2 + and Cu 2 + were 11.54 mg g − 1 and 24.87 mg g − 1 , respectively. After four desorption/adsorption experiments, UiO-66-PEI-30 still showed good adsorption performance. UiO-66 impregnated with PEI was an adsorbent with adsorption potential.
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高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Dongxu Zhu,Lijin Wang,Zheming Liu,Aiwei Tang
Cubic Cu 2−x Se nanocrystals (NCs) exhibit a strong localized surface plasmon resonance (LSPR) absorption in the near-infrared (NIR) region, in which the LSPR wavelength and stability are significant for the NIR-region applications in photo-thermal therapy and photoacoustic imaging. Herein, we have systematically studied the effects of surface ligands with varying the feeding ratio of oleylamine (OM) to oleic acid (OA) on LSPR behavior and stabilization of Cu 2−x Se NCs, which were synthesized by using a typical hot-injection method. The LSPR wavelength of the as-obtained Cu 2−x Se NCs could be tuned from 1260 to 1030 nm with an increase of the feeding ratio of OM to OA. Furthermore, these Cu 2−x Se NCs showed different LSPR stability with varying feeding ratios of OM to OA. For the Cu 2−x Se NCs synthesized in the presence of only OM, the LSPR could keep stable basically after exposure to air for 60 days. However, in the feeding ratio of OM to OA of 7:3 and 5:5 cases, the LSPR extinction spectra showed an obvious blue-shift in the wavelength. The characterized results indicated the different surface ligands had significant effects on the LSPR behavior and stabilization, and the LSPR change was in good agreement with the calculated results based on the Mie-Drude model. This work provides a new research idea for tuning the LSPR behavior of copper chalcogenide NCs.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
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IF 8.355
Jinqiang Wang,Wenzheng Yu,Nigel J.D. Graham,Lei Jiang
This paper describes a novel approach for enhancing membrane technology for the removal of heavy metal cations in contaminated waters. A simple method of forming a positively charged polyamide (PA) nanofiltration (NF) membrane has been developed by attaching a layer of hyperbranched polyethylenimine (PEI) to the PA surface, involving the linking of PEI amino groups to the PA surface carboxyl groups. The nature of the PEI modified PA membrane, in terms of surface morphology, zeta potential and hydrophobicity was found to depend on the PEI molecular weight (MW), and the PEI concentration and membrane exposure time during preparation. In turn, the nature of the modified membrane determined its performance in terms of hydraulic flux and metal ion rejection. In tests using a model solution of 5 mg/L Cu 2+ and a 70,000 MW PEI membrane the Cu rejection was >90%, with only a modest reduction in flux compared to blank water. The Cu 2+ rejection was found to be a combination of electrostatic repulsion and adsorption, with the relative proportions depending on the nature of the PEI modified PA membrane. In addition, the Cu 2+ rejection and membrane flux were found to be sustainable over repeated filtration cycles, and the rejection was not adversely affected by the presence of humic acid in solution (5 mg/L).
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高影响因子
Analytical Methods
·
2019
·Vol. 12
·期 4
·520-527
·
IF 2.378
Xianfeng Wang,Mina Sakinati,Yixia Yang,Yi Ma,Mei Yang,Huibo Luo,Changjun Hou,Danqun Huo
In this work, a coumarin derivative (CND) was synthesized by a one-step condensation reaction and exhibited selective fluorescence quenching by Cu2+. Glyphosate with amine and carboxylate groups provided strong chelation for Cu2+ from the CND/Cu2+ system, leading to fluorescence recovery. In this strategy, a CND/Cu2+ fluorescence sensing system was constructed to achieve the quantitative analysis of glyphosate. Under the optimized experimental conditions, a good linear relationship between CND and Cu2+ of glyphosate concentration in the range from 0.02 μg mL−1 to 1.50 μg mL−1 was obtained and the correlation coefficient was 0.99. The detection limit was calculated to be 18.30 ng mL−1 (S/N = 3) and presented relative advantages compared with other methods. The interference study exhibited excellent selectivity towards glyphosate. In addition, satisfactory recoveries ranging from 91.31% to 105.28% were achieved for the real samples. These results indicate that the CND/Cu2+ fluorescence sensing system has practical application prospects.
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高影响因子
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