COLLOID AND POLYMER SCIENCE
·
2015
·Vol. 293
·期 7
·2035-2044
·
IF 1.865
Chen Guoxia,Liu Junxiu,Yang Yadong,Zhang Lijuan,Wu Min,Ni Henmei
Employing polymethacrylic acid (PMAA) as the template and N -vinyl pyrrolidone (N-VP) as monomer, the ATRP-template miniemulsion polymerization was carried out in the aqueous medium by using MBP/CuBr/bpy as initiator. The results were characterized by dynamic light scattering (DLS), transmission electron microscope (TEM), and gel permeation chromatography (GPC). It was observed that the stable particles exhibited amphoteric pH sensitivity, namely that in the range of pH 3.0 to 5.0, the particles precipitated, whereas beyond the range the particles were stable and swollen as pH varied. Moreover, the pH range was variable according to the molecular weight of PVP. The results of GPC indicated that the molecular weight of template polymer PMAA was duplicated by the daughter polymer PVP. Being noncross-linked, unlike the common microgels, the hydrodynamic diameter dramatically increased in a very narrow pH range, e.g., pH 5.5 –6 and 2.0–2.5. Finally, the nanoparticles of PMAA/PVP were applied for the controlled release of rifampicin (RFP) and doxorubicin (DOX).
研究领域:
材料科学
·
药学
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2026
·
IF 5.4
Yan Ren,Jie Yang,Qi Liu,Ping Bai,Hengrui Qiu,Jinglong Cui,Yongqiang Zhang,Wenxiu He
Conversion-type anode materials based on transition-metal oxides have garnered considerable attention for high-energy-density lithium-ion batteries (LIBs) due to their high theoretical capacity and multiple reversible redox reactions; however, their practical application is impeded by severe volume expansion and structural pulverization during cycling. In this work, a polyvinylpyrrolidone (PVP)-assisted modulation strategy was developed to synthesize vine-like NiCo 2 O 4 @C composites, aiming to construct a highly conductive network and optimize the dispersion of metal oxide nanoparticles. The resulting anode features an ordered architecture in which MOF-derived components are firmly anchored onto carbon nanofibers under PVP guidance. The incorporation of carbon nanofibers significantly enhances electrical conductivity, while ZIF-67-derived nanostructures effectively suppress volume expansion, provide a high specific surface area, and create abundant porous channels. Benefiting from these structural merits, NiCo 2 O 4 @C delivers outstanding electrochemical performance, retaining 1528.5 mAh g −1 at 0.1 A g −1 after 100 cycles and 1400.2 mAh g −1 at 1 A g −1 after 500 cycles. This study offers an effective modification strategy for developing next-generation conversion-type anode materials with superior rate capability and long-term cycling stability. Download: Download high-res image (198KB) Download: Download full-size image Fig. 1. Schematic illustration of the synthesis process of the NiCo@C composite, showing the in situ growth of ZIF-67 on the surface of carbon nanofibers and its coordination structure
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2026
·
IF 8.8
Yuting Sang,Zhan Lv,Yuanyuan Yu,Haotian Hu,Jixiang Yang,Le Han,Liang Shen,Zhongbo Zhou
Surface segregation during non-solvent induced phase separation (NIPS) enables in-situ membrane functionalization, yet the inherently rapid and uncontrolled phase separation kinetics typically yield heterogeneous additive distribution. Herein, we presented a hydrogel-facilitated phase separation (HFPS) strategy to achieve controlled surface segregation of tannic acid/polyvinylpyrrolidone (TA/PVP) for subsequent in-situ Ag + reduction and assembly of a functional AgNPs layer. By exploiting delayed phase separation kinetics, physical confinement and interfacial gelation imparted by the hydrogel, HFPS yielded substantially higher and more uniform TA/PVP surface coverage (79.8%) compared to NIPS (60.9%). This uniformly enriched TA/PVP layer enabled high-density, homogeneous AgNP grafting with a narrow size distribution on HFPS membranes. The optimized HFPS membrane—with balanced TA/PVP and Ag + loadings—exhibited superhydrophilicity (water contact angle ~ 40°), high water flux (895 L·m −2 ·h −1 ·bar −1 ), and excellent BSA rejection (>98%)—significantly outperforming its NIPS counterpart (50–65°, 362 L·m −2 ·h −1 ·bar −1 , ~ 98%). In dynamic antifouling tests, it achieved a flux recovery ratio (FRR) of 84.7% with BSA filtration and only 5.3% flux decline during bacterial filtration, substantially exceeding NIPS controls (64.4% FRR, ∼45% decline). Moreover, by utilizing patterned hydrogel templates, surface microstructures were introduced to further enhance flux to 994 L·m −2 ·h −1 ·bar −1 and reduce flux decline to 3.8% for bacterial filtration. Ag + release measurements confirmed a higher total Ag loading of 59.1 μg·cm −2 and a stable release rate of 0.199 μg·cm −2 ·day −1 sustained over 40 days. Overall, this HFPS-guided surface segregation strategy offers a promising platform for fabricating high-performance antifouling membranes for engineering applications.
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DOI
高影响因子
Petroleum
·
2026
·
IF 5.5
Zhuo Huang,Zhenyu Li
Discharge of oily wastewater, generated from oil and gas production can lead to severe marine and soil contamination, posing long-term threats to ecosystems and water security. Therefore, developing environmentally sustainable, high-flux, and chemically robust separation membranes is crucial for green petroleum production and water reuse. In this work, pre-oxidized polyacrylonitrile/polyvinylpyrrolidone (p-PAN/PVP) nanofibrous membrane has been fabricated to address this challenge aforementioned. The PVP, during pre-oxidation, formed cross-linked junctions, reinforcing the mechanical stability and the resistance to harsh chemical conditions. Additionally, our membrane also exhibited superhydrophilicity in air, underwater super-oleophobicity, low oil adhesion, ultrahigh flux (>8500 L·m -2 ·h -1 ·bar -1 ), and >99.8% separation efficiency for both crude-oil-in-water and surfactant-stabilized emulsions. More importantly, the p-PAN/PVP membrane could maintain integrity and wettability under acidic, alkaline, and high-salinity environments (1 M HCl, 1 M NaOH, 10 wt% NaCl) as well as in organic solvents (N, N-dimethylformamide, N, N-dimethylacetamide, dimethyl sulfoxide, etc). Our study provides a sustainable strategy to protect vulnerable ecosystems and promote cleaner energy development.
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DOI
高影响因子
Catalysts
·
2017
·Vol. 7
·期 7
·194
·
IF 3.082
Yuanliang Ma,Zhongkun Zhao,Zhurui Shen,Qiang Cai,Huiming Ji,Leichao Meng
Herein, a novel CdS nanocomposite is fabricated by a facile one-pot hydrothermal method assisted by glucose and polyvinylpyrrolidone (PVP). The as-prepared CdS is coated with a thin layer, which is determined to be hydrothermal carbonation carbon (HTCC) mainly containing semiconductive polyfuran. The as-prepared HTCC-coated CdS shows superior photocatalytic activity for the degradation of Rhodamine B (RhB) under visible light irradiation (λ ≥ 420 nm). The optimum sample (glucose content of 0.1 g) shows a degradation rate four-times that of pure CdS reference. Moreover, it also shows an improved stability, and the activity can be maintained at 96.2% after three cycles of recycling. The enhanced photocatalytic activity and stability of nanocomposite can mainly be attributed to: (i) The addition of PVP in the reaction solution can significantly increase the specific surface area of CdS and thus offer more active sites; (ii) The HTCC in the nanocomposite can expand the range of light absorption; (iii) The HTCC layer can form a heterojunction with CdS and improve the charge separation and transfer.
研究领域:
材料科学
·
纳米技术
·
环境科学
·
光化学
✓ 已验证
DOI
高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2025
·
IF 7.8
Yingjun Gao,Yinyan Guan,Jiyan Liang,Lei Yu,Yumeng Ye,Shengnan Chen,Jiayu Lv,Dehong Cheng
To address the demands for heavy metal wastewater treatment and copper resource recycling, hybrid capacitive deionization (HCDI) technology offers advantages of low energy consumption and ion selectivity. However, the practical application of HCDI is limited by the insufficient adsorption performance and stability of electrode materials. In this study, flower-like copper sulfide (CuS) was synthesized via a hydrothermal method and used as CDI electrodes, with polyvinylidene fluoride (PVDF) and polyvinyl butyral/polyvinylpyrrolidone (PVB/PVP) as binders. The effects of the two binders on electrode structure and performance were investigated, focusing on elucidating the selective adsorption mechanism of CuS as an HCDI cathode. The CuS-PVDF electrodes exhibited superior conductivity and higher Cu 2+ adsorption capacity (551.49 mg·g −1 at 1.0 V), attributed to the polar stabilization effect of rigid molecular chains and low surface energy of PVDF, which facilitated efficient utilization of CuS active sites. In contrast, the PVB-PVP binder caused shielding of active sites on CuS, and delayed charge transport due to encapsulation by flexible polymer chains. Moreover, the CuS electrodes exhibited selective adsorption of Cu 2+ in the HCDI system. The selectivity of Cu 2+ exceeded 70 % in a mixture of multiple heavy metal ions. This selective mechanism can be attributed to pK sp (CuS) = 40.3 and redox-mediated phase transformation (CuS→Cu 2 S/Cu 2 O/Cu).
研究领域:
环境工程
·
材料科学
·
电化学
·
水处理技术
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL RESEARCH
·
2025
·
IF 7.7
Mengru Shi,Weijiang Tang,Sheng Guo,Fengxi Chen
Emerging antibiotic pollutants pose long-term risks to ecosystems and human health, necessitating the development of advanced elimination technologies. In this study, hierarchically porous α-Fe 2 O 3 nanosheets (α-Fe 2 O 3 -PNS) were prepared from an iron-polyvinylpyrrolidone (Fe-PVP) hybrid gel, where PVP served multiple functions, including iron immobilization, morphology template, pore formation, and crystallite growth regulation. As an efficient heterogeneous Fenton-like catalyst, α-Fe 2 O 3 -PNS achieved 93.6 % degradation of tetracycline (TC, 25 mg/L) within 2 h under mild conditions (25 °C, pH 5) using only 4 mM H 2 O 2 . The reaction followed pseudo-first-order kinetics with a high rate constant (0.0606 min −1 ) and an outstanding normalization factor (8.13). Key operational parameters (i.e., PVP dosage, catalyst loading, H 2 O 2 concentration, initial pH, coexisting anions and natural organic matter) were investigated. The material exhibited good reusability over five consecutive cycles and maintained robust performance in real water matrices. Its superior catalytic activity originated from exposed (113) crystal planes, abundant accessible iron sites, and rapid Fe 3+ /Fe 2+ redox cycling facilitated by the large surface area. Radical quenching tests and electron paramagnetic resonance spectroscopy confirmed that hydroxyl radicals, generated via surface Fe 2+ -mediated H 2 O 2 activation, are dominant reactive species, driving TC degradation through hydroxylation, oxidative cleavage, and ring-opening reactions. This study provides an energy- and resource-efficient solution for sustainable water remediation, operating effectively under ambient and circumneutral conditions with low H 2 O 2 consumption.
研究领域:
环境催化
·
材料科学
·
水处理技术
·
纳米材料化学
·
污染控制工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yan Wang,Zhichao Zheng,Janak L. Pathak,Haoyu Cheng,Sizhen Huang,Zi Fu,Ping Li,Lihong Wu,Huade Zheng
Biocompatible, antibacterial, anti-inflammatory, and tissue regenerative smart dressings are in urgent need for infected skin wound repair in clinics. Portable in situ 3D-electrospun technology has the great advantage of direct deposition of required smart dressing on wound surfaces. Here, we fabricated a copper peptide (GHK-Cu) and quaternium-73 (Pionin) dual-drug-loaded polyvinyl butyral (PVB)/polyvinylpyrrolidone (PVP) smart nanofibers dressing using in-situ electrospinning technology for skin wound repair. The physicochemical properties and biological activities of smart dressing were extensively analyzed. In vivo biocompatibility, anti-oxidant, anti-inflammatory, and antimicrobial activities of smart dressing were analyzed during wound healing. Stable and homogeneous PVB/PVP nanofiber smart dressing with uniformly distributed GHK-Cu and Pionin and anabolic biological activities was obtained. Biocompatible smart dressing gave a sustained release of GHK-Cu and Pionin, promoted the migration and adhesion of dermal fibroblasts and keratinocytes, and showed anti-oxidant and anti-apoptotic effects in vitro and in vivo. Smart dressing exerted anti-inflammatory properties via M1 to M2 macrophage phenotype switching and effectively promoted wound healing. Pionin released from smart dressing not only killed but also inhibited the expression and delivery of virulence factor expression and bacteria adhesion. During wound healing, smart dressing promoted the proliferation of cells in the epidermal tissue, epithelial tissue remodeling, granulation tissue growth, neovascularization, and M2 macrophage polarization. Moreover, this smart dressing scavenged excess reactive oxygen species, increased SOD3 and SIRT1 expression, and repaired peroxidized tissue, consequently promoting wound healing. In summary, our results indicate that GHK-Cu/Pionin-loaded in situ electrospun PVB/PVP smart dressing promotes wound healing via anti-oxidant, anti-inflammatory, antimicrobial, and tissue regenerative effects, suggesting clinical application of this smart dressing for complicated skin wound healing.
研究领域:
生物医学工程
·
伤口愈合
·
材料科学
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产品关联
DOI
高影响因子
Food Bioscience
·
2026
·
IF 6.2
Xifan Zhan,Xinying Wang,Md Mehedi Hassan,Fangling Jiang,Jiaying Xu,Yuan Zhang,Shanghua Li,Sha Zou,Hongfa Liu,Yi Xu,Quansheng Chen
Pesticide residues in tea pose significant health risks to consumers. This research focuses on developing a surface-enhanced Raman scattering (SERS) sensor using a solid-phase substrate made of Au@Ag@PVP nanoparticles (NPs), combined with machine learning chemometric techniques, for the rapid detection of trichlorfon, carbendazim, and clothianidin in tea. Au@Ag@PVP NPs were immobilized onto anodic aluminum oxide (AAO) filter membranes via vacuum filtration, yielding densely packed NPs that generate strong electromagnetic hot spots, thereby increasing SERS sensitivity. Raman spectra of tea infusions containing different concentrations of pesticides were acquired and analyzed using three machine-learning algorithms. Among these models, competitive adaptive reweighted sampling-partial least squares (CARS-PLS) demonstrated superior predictive performance, with Rc = 0.9950, Rp = 0.9942, and RPD = 9.2893 for trichlorfon; Rc = 0.9955, Rp = 0.9942, and RPD = 9.1010 for carbendazim; and Rc = 0.9981, Rp = 0.9957, and RPD = 9.7523 for clothianidin. This approach enables the rapid, quantitative detection of pesticide residues with minimal sample preparation and high sensitivity, representing a practical method for monitoring tea safety.
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高影响因子
ChemElectroChem
·
2021
·Vol. 8
·期 20
·3894-3903
·
IF 4.59
Shanshan Chai,Kangze Dong,Tong Wu,Qingsheng Wu
Graphical A super-flexible carbon fiber network material is prepared by electrospinning followed by in situ carbonization. NiCo 2 O 4 nanosheets with a three-dimensional network membrane structure are then electrodeposited on it, exhibiting excellent flexibility and electrochemical performance both in supercapacitors and sodium-ion batteries. The rapid development of wearable electronics requests a higher energy-storage-device flexibility. Nevertheless, the fabrication of high-performance electrodes for achieving the goal of super-flexibility remains challenging. In this work, novel super-flexible PAN/PVP carbon nanofiber networks (PAN/PVP CNFs, PCF) are prepared by electrospinning followed by in situ carbonisation, whose micro-mesoporous structure could disperse stress during folding and super-flexible PCF/NCONS self-supporting electrodes are fabricated through the electrodeposition of NiCo 2 O 4 nanosheets (NCONS) with three-dimensional membrane structure on the PCF firmly. The obtained PCF/NCONS cannot only achieve 8000 times folding, but also show high electrochemical performance for both supercapacitors and sodium-ion batteries (SIBs). For supercapacitor, the specific capacitance of the PCF/NCONS reaches 1403.5 F/g at 1 A/g and it could maintain at 95.7 % after 2000 cycles. The PCF/NCONS electrodes are also used to fabricate an asymmetric supercapacitor device. The device exhibit high energy density (26.96 Wh/kg), high power density (3870.69 W/kg at 14.52 Wh/kg) and outstanding cycling stability (96.8 % retention after 3000 cycles). For SIBs, the PCF/NCONS electrodes show a high reversible capacity of 227.68 mAh/g after 100 cycles at a current density of 0.1 A/g. The super-flexible PCF/NCONS electrodes have a wide application prospect for flexible electronics.
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DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2021
·Vol. 28
·期 3
·1-11
·
IF 3.097
Yang Jiafei,Shang Jingqi,Chen Jiewei,Xue Feng,Ke Zunye,Zhang Xiangfen,Ding Enyong
In this study, a simple method was used to synthesize a new type of magnetic composite material BNNS@ Fe 3 O 4 . In the PVP aqueous solution, the h-BN surface was exfoliated by a high-pressure homogenizer to obtain a few layers of BNNS. Then FeCl 3 ·6H 2 O and hydrazine hydrate were added for reduction treatment, and deposited Fe 3 O 4 nanoparticles on the surface of BNNS. PVP can not only stabilize a few layers of BN, but also promote the formation of Fe 3 O 4 . Through SEM, TEM, XRD, XPS and other characterization methods, the composition and surface morphology of the composite material were determined. Furthermore, the adsorption of Congo red by the composite material was explored. The removal rate of Congo Red by composite of BNNS @ Fe 3 O 4 (0.1) was 39% after 12 h reaction at 323 K. But adsorption capacity also increased with time, when the time was extended to 48 h, its maximum removal rate of Congo Red was 83% and the adsorption capacity was 499 mg/g at 313 K. The adsorption kinetics and thermodynamics of the composite material for Congo red at 313 K were studied. The adsorption process was more consistent with the pseudo-second-order kinetic equation. The composite nanoparticles can move directionally under the action of a magnetic field, which also has potential application value in thermal conductivity.
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高影响因子
NANOTECHNOLOGY
·
2024
·Vol. 36
·期 6
·065101
·
IF 2.9
Xu Chen,Jian Yue,Xiongjun Xu,Jiajun Chen,Xuechan Huang,Yukai Huang,Yang Yang,Feng Li,Tianwang Li
Selenium-based nanoparticles exhibit antiviral activity by directly modulating immune function. Despite recent promising developments in utilizing selenium nanoparticles (Se NPs) against viral infections, the impact of surface ligand charge on the conformation and interaction with viral proteins, as well as the effectiveness of Se NPs in anti-Herpes simplex virus 1 (HSV-1) infection remains unexplored. In this study, three types of selenium nanoparticles (CTAB-Se, PVP-Se, SDS-Se) with distinct surface charges were synthesized by modifying the surface ligands. We found that apart from differences in surface charge, the size, morphology, and crystal structure of the three types of Se NPs were similar. Notably, although the lipophilicity and cellular uptake of SDS-Se with a negative charge were lower compared to positively charged CTAB-Se and neutrally charged PVP-Se, SDS-Se exhibited the strongest protein binding force during interaction with HSV-1. Consequently, SDS-Se demonstrated the most potent anti-HSV-1 activity and safeguarded normal cells from damage. The mechanistic investigation further revealed that SDS-Se NPs effectively inhibited the proliferation and assembly of HSV-1 by powerfully suppressing the key genes and proteins of HSV-1 at various stages of viral development. Hence, this study highlights the significant role of surface ligand engineering in the antiviral activity of Se NPs, presenting a viable approach for synthesizing Se NPs with tailored antiviral properties by modulating surface charge. This method holds promise for advancing research on the antiviral capabilities of Se NPs.
研究领域:
纳米技术
·
病毒学
·
材料科学
·
免疫学
·
药学
✓ 已验证
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）