FOOD CHEMISTRY
·
2024
·
IF 8.5
Zhanqiu Tang,Xinyi Feng,Hongyuan Tian,Junhua Wang,Weidong Qin
A novel method is introduced for extracting and enriching Cd(II) and Pb(II) from edible oils using glutathione disulfide (GSSG) as both an extractant and a phase-separation agent. The ions in the oils were initially extracted into an aqueous solution containing GSSG. After mixing the solution with acetonitrile at the appropriate volume ratio, a new phase formed, resulting in enrichment of the analytes. The experimental conditions were optimized using response surface methodology with a central composite design. Under optimal conditions, the method offered a combined enrichment factor of >660, with combined extraction efficiencies of 84.31% and 83.35% for Cd(II) and Pb(II), respectively. Finally, the method was conjugated to capillary electrophoresis to determine Cd(II) and Pb(II) in edible oil samples, with detection limits of 0.45 and 1.24 ppb, respectively. In comparison to traditional approaches, the GSSG-based method demonstrates rapidity, efficiency, and recyclability in extracting heavy metal ions from complex matrices.
研究领域:
分析化学
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环境科学
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食品科学
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产品关联
DOI
PubMed
高影响因子
Materials
·
2020
·Vol. 13
·期 5
·1241
·
IF 3.057
Xiang Li,Yan Xiong,Ming Duan,Haiqin Wan,Jun Li,Can Zhang,Sha Qin,Shenwen Fang,Run Zhang
For further the understanding of the adsorption mechanism of heavy metal ions on the surface of protein-inorganic hybrid nanoflowers, a novel protein-derived hybrid nanoflower was prepared to investigate the adsorption behavior and reveal the function of organic and inorganic parts on the surface of nanoflowers in the adsorption process in this study. Silk fibroin (SF)-derived and copper-based protein-inorganic hybrid nanoflowers of SF@Cu-NFs were prepared through self-assembly. The product was characterized and applied to adsorption of heavy metal ion of Pb(II). With Chinese peony flower-like morphology, the prepared SF@Cu-NFs showed ordered three-dimensional structure and exhibited excellent efficiency for Pb(II) removal. On one hand, the adsorption performance of SF@Cu-HNFs for Pb(II) removal was evaluated through systematical thermodynamic and adsorption kinetics investigation. The good fittings of Langmuir and pseudo-second-order models indicated the monolayer adsorption and high capacity of about 2000 mg g−1of Pb(II) on SF@Cu-NFs. Meanwhile, the negative values ofΔrGm(T)θandΔrHmθproved the spontaneous and exothermic process of Pb(II) adsorption. On the other hand, the adsorption mechanism of SF@Cu-HNFs for Pb(II) removal was revealed with respect to its individual organic and inorganic component. Organic SF protein was designated as responsible ‘stamen’ adsorption site for fast adsorption of Pb(II), which was originated from multiple coordinative interaction by numerous amide groups; inorganic Cu3(PO4)2crystal was designated as responsible ‘petal’ adsorption site for slow adsorption of Pb(II), which was restricted from weak coordinative interaction by strong ion bond of Cu(II). With only about 10% weight content, SF protein was proven to play a key factor for SF@Cu-HNFs formation and have a significant effect on Pb(II) treatment. By fabricating SF@Cu-HNFs hybrid nanoflowers derived from SF protein, this work not only successfully provides insights on its adsorption performance and interaction mechanism for Pb(II) removal, but also provides a new idea for the preparation of adsorption materials for heavy metal ions in environmental sewage in the future.Keywords:silk fibroin;hybrid nanoflowers surface;Pb(II) removal;interaction mechanism
研究领域:
环境科学
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材料科学
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化学工程
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纳米技术
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DOI
PubMed
高影响因子
Analytical Methods
·
2025
·
IF 2.6
Wei Li,Xin Hu,Anyi Chen,Rongxin Wu,Chaorui Li
Metal–organic framework (MOF-818) and nanocomposite (Fe3O4@PB-Au) dual nanozymes for enhanced cascade signal amplification were designed. MOF-818 has excellent catechol oxidase mimetic activity and catalyzes the production of color and in situ generation of hydrogen peroxide from the substrate 3,5-di-tert-butylcatechol (3,5-DTBC). Subsequently, Fe3O4@PB-Au with peroxidase-like activity catalyzes the generation of reactive oxygen species from hydrogen peroxide, which oxidizes 3,3′,5,5′-tetramethylbenzidine (TMB) to generate the oxidized state of oxTMB, resulting in a signal-enhancing effect. The prepared dual nanozymes can be combined with aptamers with specific recognition ability, thus developing a colorimetric aptamer sensor with high sensitivity and selectivity for detecting Golgi protein 73, which provides a feasible assay for clinical detection of GP73 protein. Detection of GP73 was accomplished by measuring the UV absorption peak at 415 nm. Under the optimal conditions, the concentration of GP73 was linearly correlated with the absorbance in the range of 10.0–100.0 ng mL−1 with a detection limit of 1.83 ng mL−1. The proposed colorimetric biosensor was successfully applied to the determination of GP73 in spiked human serum samples with recoveries of 96.15–100.95% and RSDs of 1.52–6.85%, which demonstrated the great potential of the highly sensitive GP73 assay in clinical detection.
研究领域:
生物化学
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医学检测
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纳米技术
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产品关联
DOI
PubMed
高影响因子
Journal of Energy Storage
·
2020
·
IF 3.762
Jian Gu,Jing Zhong,Kai-da Zhu,Xin-ru Wang,Sen-lin Wang
The addition of carbon or carbon composite materials to the negative plate of lead-acid battery could effectively improve the battery electrochemical performance. Herein, a novel Pb@C nanocomposites are in-situ prepared by pyrolysis lead acetate impregnated glucose gel at nitrogen atmosphere. While the Pb@C nanocomposites is used as the additive adding in the negative active materials (NAM) of lead-acid batteries, which can great enhance the utilization of NAM. The negative plate, containing 1 wt.% Pb@C, owns the high affinity between the NAM and Pb@C material, which shows the best cycle-life (8921 cycles) performance on high-rate partial-state-of-charge (HRPSoC) and the highest of initial discharge specific capacity (165.1 mAh g −1 ). Moreover, the lower polarizability and more stable rate capability of the lead-acid cells contain Pb@C compare with blank cell. Besides, accelerate the diffusion of electrolyte and PbSO 4 dissolution, due to the Pb@C materials form porous-skeleton with NAM in the negative plate. In summary, the Pb@C nanocomposites have potential to be used to enhance the specific capacity and HRPSoC cycle-life of lead-acid batteries.
研究领域:
材料科学
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电化学
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DOI
高影响因子
Open Chemistry
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2020
·Vol. 18
·期 1
·97-107
·
IF 1.216
Huayu Huang,Yang Wang,Yubin Zhang,Zhiying Niu,Xinli Li
Amino-functionalized graphene oxide (GO-NH 2 ) was synthesized by grafting (3-aminopropyl) triethoxysilane on the graphene oxide (GO) surface. The GO-NH 2 with high surface area and numerous active sites can efficiently adsorb Cr(VI), Cu(II), Pb(II) and Cd(II) ions. The maximum adsorption capacities of GO-NH 2 for Cr(VI), Cu(II), Pb(II) and Cd(II) were 280.11, 26.25, 71.89 and 10.04 mg g −1 , respectively. The pseudo-first-order and pseudo-second-order kinetic models were employed to describe the kinetic processes. The experimental data agreed well with the pseudo-second-order kinetic equation, and the adsorption of heavy metals onto GO-NH 2 occurs via chemical adsorption. The characteristics of Cr(VI), Cu(II), Pb(II) and Cd(II) in the GO-NH 2 adsorption processes were analyzed using the Langmuir and Freundlich isotherm models. The adsorption processes of Pb(II) and Cd(II) on GO-NH 2 were fit by the Langmuir model. The Freundlich isotherm model was well correlated to Cr(VI) and Cu(II). The GO-NH 2 is a promising material for the removal of heavy metal ions from industrial wastewater. This study provides an effective pathway to process industrial wastewater, and the GO-NH 2 has a good adsorption effect for the treatment of heavy metals in industrial wastewater.
研究领域:
环境科学
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化学工程
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材料科学
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水处理
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DOI
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
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2014
·
IF 3.107
Xiao-kun OuYang,Ru-Na Jin,Le-Ping Yang,Zheng-Shun Wen,Li-Ye Yang,Yang-Guang Wang,Chong-Yu Wang
A novel porous succinylated bioadsorbent was prepared by the partial enzymatic hydrolysis of bamboo (Phyllostachys heterocycla) and its subsequent modification with succinic anhydride. Pb(II) removal from solutions that also contained sodium chloride and an amino acid was investigated using the bioadsorbent. Enzymatic hydrolysis increased the number of accessible hydroxyl groups and surface area of the raw bamboo, and created many pores within the material. The porous succinylated bioadsorbent exhibited high efficiency for Pb(II) binding. The sodium chloride content significantly decreased the Pb(II) adsorption capacity, whereas a minor effect was observed in the presence of arginine. The experimental data could be accurately described by a pseudo-second-order kinetics model, and the adsorption proceeded via an ion exchange mechanism. Even in a solution containing sodium chloride and arginine, the maximum adsorption capacity of Pb(II) by the porous succinylated bioadsorbent was 99.5 mg/g at 303 K.
研究领域:
环境科学
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材料科学
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化学工程
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Yaping Wang,Jie Liu,Chao Liu,Yongwei Lin,Xuefei Duan,Yongfei Ma,Hua Zhang,Muwen Deng,Qian Wang
The heterogeneity of tumors and complex pathways present significant challenges for effective treatment. In response, we developed a multifunctional platform combining photothermal therapy (PTT) and chemodynamic therapy (CDT), PB@Pd nanoparticles (NPs), to enhance the therapeutic efficacy of colorectal cancer. PB@Pd NPs were synthesized by doping palladium (Pd) on the surface of Prussian blue (PB) nanomaterials, enabling synergistic therapeutic effect. PTT generates localized hyperthermia, which accelerates the Fenton-like reaction and promotes the production of reactive oxygen species (ROS) in the tumor microenvironment. Meanwhile, ROS generated by CDT disrupts the tumor’s antioxidant defence system and increases the thermal sensitivity of cancer cells, thus enhancing the efficacy of PTT. This PTT/CDT synergistic approach overcomes the limitations of monotherapies, such as the limited penetration depth of PTT and the inefficiency of CDT in low H 2 O 2 environments. In vitro cellular experiments demonstrated that PB@Pd NPs significantly improved the therapeutic efficacy through synergistic effects. The nanoplatform also has good biocompatibility and stability, reducing the risk of side effects and drug resistance. By integrating PTT and CDT in vivo colon cancer model, PB@Pd NPs offer a promising strategy for more precise, efficient and less toxic tumor therapy, demonstrating their potential in advanced cancer therapies.
研究领域:
纳米医学
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肿瘤学
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光热治疗
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化学动力学治疗
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生物医学工程
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材料科学
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癌症治疗
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产品关联
DOI
高影响因子
Scientific Reports
·
2017
·Vol. 7
·期 1
·1-11
·
IF 4.259
Wang Yaoguang,Wu Di,Wei Qin,Wei Dong,Yan Tao,Yan Liangguo,Hu Lihua,Du Bin
In this study, branched polyethylenimine (PEI) enhanced magnetic carboxymethyl chitosan (MCMC-PEI) was synthesized and applied as adsorbent for the rapid removal of Pb(II) from aqueous solution. The successful synthesis of the adsorbent was proved by scanning electron microscope (SEM), Fourier transform infrared spectrum (FTIR) and X-ray powder diffraction (XRD). Simultaneously, the effect of the parameters such as initial concentration, adsorbent mass and pH of the solution on the removal of Pb(II) was studied by using response surface methodology (RSM). And central composite design (CCD), which is a widely used form of RSM, was employed in the experimental design procedure. The adsorption results revealed that the adsorption process could reach equilibrium rapidly within 10 min. Furthermore, the adsorption kinetic data could be well described by pseudo-second order model. The maximum adsorption capacity was 124.0 mg/g according to the Langmuir-Freundlich model, which fitted the adsorption isotherm of Pb(II) better than Langmuir model and Freundlich model, respectively. Thermodynamic studies (Δ G < 0, Δ H < 0, Δ S > 0) implied a spontaneous and exothermic process in nature. Meanwhile, the fabricated adsorbent exhibited excellent reusability. Therefore, the excellent adsorption property of MCMC-PEI made it a promising application in water treatment.
研究领域:
环境科学
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材料科学
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化学工程
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水处理
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产品关联
DOI
PubMed
高影响因子
Metals
·
2025
·Vol. 15
·期 9
·936
·
IF 2.5
Xiangqing Liu,Chenyu Li,Jie Yu,Ruiqi Liu,Min Shang,Xiaolin Su,Jinye Yao,Haitao Ma
This study investigates the synergistic effects of single- and binary-additive systems on the morphology and nucleation mechanism of Sn-Pb alloy electrodeposited coatings. Scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS), linear sweep voltammetry (LSV), electrochemical impedance spectroscopy (EIS), and chronoamperometry were applied in order to obtain more information on the action mechanisms of single-additive systems (cinnamaldehyde, PEG-2000, gelatin, vanillin) and binary ones (0.1 g/L cinnamaldehyde + 0.2 g/L PEG-2000) in Sn-Pb electroplating. Results showed that the use of binary-additive systems based on cinnamaldehyde and PEG-2000 significantly improved coating quality, leading to a smooth and uniform surface, dense grains, and a near-eutectic composition (Sn 63.10 wt.%, Pb 36.90 wt.%). This was because the composite additive, through synergistic effects, exhibited the highest cathodic polarization and the largest charge transfer resistance (189.20 Ω cm2), thus inhibiting the electrodeposition process of Sn2+and Pb2+. Chronoamperometry revealed that, unlike single additives (PEG-2000 or cinnamaldehyde), the binary-additive system promoted a transition of nucleation mode to instantaneous nucleation, accompanied by a decrease in the peak current and an extension of the corresponding time. This study provides a theoretical basis and experimental support for understanding the nucleation mode of Sn-Pb electroplating, as well as optimizing the synergistic mechanism of additives.
研究领域:
材料科学
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电化学
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表面工程
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Wenya Shi,Jie Yang,Yuyang Guo,Zhaoyu Zhang,Hualin Li,Han Guo,Jianqiu Deng,Qingrong Yao,Lichun Cheng,Qianxin Long
Industrial wastewater containing heavy metal ions has become an urgent problem to be solved due to its environmental persistence and bioaccumulation. In this study, powdered adsorbent (DE/CBC) and spherical adsorbent (SA@DE/CBC) were prepared from natural diatomite (DE), crab shell biochar (CBC) and sodium alginate (SA) as raw materials, and were used to adsorb Pb(II) from wastewater. The adsorption isotherm fitting showed that the experimental process of DE/CBC and SA@DE/CBC conformed to the Langmuir model, and the maximum adsorption capacity of the monolayer reached 1155 mg/g and 365 mg/g, respectively. The pseudo-first-order kinetic model showed better fitting for the two adsorbents, and the diffusion rate was controlled by multiple steps. Compared with most traditional composite adsorbents, DE/CBC and SA@DE/CBC can achieve 98 % and 93 % adsorption rates at relatively high Pb(II) concentrations, and maintain 83 % and 84 % high adsorption capacity after 10 adsorption–desorption cycles, demonstrating superior Pb(II) adsorption performance and excellent structural stability. The spherical morphology not only effectively solves the problems of adsorbent recovery and secondary pollution prevention and control, but also plays a role in protecting the structure and active sites of powdery materials, making it more durable and practical. Collectively, the developed composite not only enables high-value-added utilization of biowaste but also demonstrates cost-effectiveness and excellent reusability, providing a sustainable remediation strategy for lead-contaminated water systems.
研究领域:
环境科学
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材料工程
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化学工程
·
水处理技术
·
吸附过程
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产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 19
·10750-10758
·
IF 14.511
Hanyu Wang,Wenjing Zou,Yukun Ouyang,Xiong Deng,Hu Luo,Juehao Xu,Xingchong Liu,Haimin Li,Xiaoli Gong,Yue Lei,Yafei Ni,Yongshan Peng
Ionic defects in perovskite films decrease both the power conversion efficiency (PCE) and stability of a perovskite solar cell (PSC). Herein, fluorinated D-pentafluoro-phenylalanine (D-PFPAA) zwitterions are introduced into a perovskite to passivate the ionic defects and effectively consolidate the Pb–X framework to suppress ion migration. The results demonstrate that the amino, carboxyl, and fluorine groups in D-PFPAA can support the multifunctional passivation of both positive and negative ionic defects, including uncoordinated Pb2+ ions and halogen (X−) defects in the perovskites, thereby effectively suppressing charge recombination. Consequently, a D-PFPAA-modified device shows a highest PCE of 21.56% with an increased open circuit voltage of 1.15 V. Apart from the consolidated Pb–X framework, resulting from multifunctional passivation, the fluorine groups in D-PFPAA can also form an effective hydrophobic barrier to protect the perovskite film from moisture-related erosion. As a consequence, the D-PFPAA-modified device retains more than 85% of its original PCE after undergoing 500 h of aging at 45% relative humidity under ambient conditions. This work provides a promising strategy for the realization of efficient and stable PSCs via the selection of fluorinated zwitterions to passivate the ionic defects, inhibit ion migration, and protect against moisture damage.
研究领域:
材料科学
·
太阳能
·
化学
·
纳米技术
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产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2023
·
IF 11.4
Ruiqing Zhou,Chengqing Huang,Nanxi Bi,Ling Li,Changqing Li,Xiaozhen Gu,Yang Song,Hui-Li Wang
Lead (Pb) is a widespread neurotoxic pollutant. Pb exposure is associated with mood disorders, with no well-established neural mechanisms elucidated. In the present study, we aimed to investigate whether excitatory neurons in the dentate gyrus subregion of the ventral hippocampus (vDG) played a key role in Pb-induced anxiety and depression-like behaviors. C57BL/6 mice were exposed to 100 ppm Pb starting on day 1 of pregnancy until experiments were performed using the offspring. Behavioral studies suggested that chronic Pb exposure triggered anxiety and depression-like behaviors. A combination of electrophysiological, optogenetic, and immunohistochemistry experiments was conducted. Results showed that Pb exposure resulted in excitatory neuronal hyperexcitability in vDG and that the behavioral deficits caused by Pb exposure could be rescued by inhibition of excitatory neuronal activity. Moreover, it was found that the action potential (AP) threshold of excitatory neurons was decreased by electrophysiological recordings. Our study demonstrates a significant role for excitatory neurons in vDG in Pb-induced anxiety and depression-like behaviors in mice, which is likely a result of decreased AP threshold. These outcomes can serve as an important basis for understanding mechanisms of anxiety and depression under environmental Pb exposure and help in the design of therapeutic strategies.
研究领域:
神经科学
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毒理学
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行为科学
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）