MICROCHEMICAL JOURNAL
·
2022
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IF 5.304
Yahuan Li,Yang Li,Qingyun Chang,Xiaohuan Zang,Shuaihua Zhang,Chun Wang,Zhi Wang
MXene-polyvinylpyrrolidone (MXene-PVP) was first prepared by physically doping combined with spray drying, which can overcome the aggregation of the MXene. Then, the MXene-PVP was carbonized to result in a carbonized MXene-PVP (MXene-PVP-C), which was then immobilized on stainless steel wire by sol–gel approach to prepare a new solid-phase microextraction (SPME) fiber. The prepared MXene-PVP-C coated fiber was studied for the extraction of 10 polycyclic aromatic hydrocarbons (PAHs) from tea beverages by using SPME method prior to gas chromatographic detection. The main SPME parameters, including extraction temperature, extraction time, salt concentration, sample solution pH and stirring rate, were investigated by central composite design methodology. Under the optimized conditions, the developed method gave the limits of detection of 0.03–0.15 µg/L, and the limits of quantification of 0.10–0.50 µg/L for the PAHs. The method recoveries for the PAHs in spiked tea beverages ranged from 78.6 % to 122 %. The single-fiber and fiber-to-fiber relative standard deviations were lower than 8.2 % and 9.6 %, respectively.
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高影响因子
CHEMOSPHERE
·
2021
·
IF 7.086
Kunkun Wang,Yinqing Zhang,Binbin Sun,Yi Yang,Bowen Xiao,Lingyan Zhu
Silver nanoparticles (AgNPs) are among the most applied nanomaterials and have great potential to be present in the environment. Dissolved black carbon (DBC) is ubiquitous in soil as a result of large-scale application of biomass-derived black carbon as soil amendments, while its impacts on the transport of AgNPs remain unclear. In this study, two DBCs with different functional groups were prepared at 300 and 500 °C (DBC300 and DBC500), and their impacts on the transport of uncoated AgNPs (Bare-AgNP) and polyvinylpyrrolidone-coated AgNPs (PVP–AgNP) in saturated quartz sand were investigated. The transport of PVP-AgNP was much higher than Bare-AgNP under the same conditions because of the increased steric hindrance provided by PVP surface coating. The transport of two kinds of AgNPs was both enhanced by the DBCs under all the experimental conditions. DBC500 displayed a stronger enhancement effect than DBC300 on PVP-AgNP transport, but DBC300 facilitated the migration of Bare-AgNP more significantly than DBC500. The higher aromaticity and stronger hydrophobicity of DBC500 drove it to be adsorbed on the surface of PVP-AgNP, thus providing stronger steric hindrance and promotion effect on PVP-AgNP transport. However, DBC300 contained surface sulfhydryl groups, which bound with the Bare-AgNP tightly, therefore it greatly promoted Bare-AgNP transport via enhanced steric hindrance. (X)DLVO calculations indicated DBCs generally increased the energy barrier between the AgNPs and sand grains. The results shed light on the vital roles of both the properties of AgNPs and DBCs on the fate and environmental behaviors of silver nanomaterials in complex environments.
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高影响因子
Tungsten
·
2025
·
IF 11.2
Shi Xue-Chao,Wang Yi-Mei,Hou Shu-Xian,Yang Guo-Qiang,Liu Xin-Xin,Ge Jun,Gui Lin,Zhang Wei-Wei,Kaoutar Chaldi,Li Shu-Jie,Wang Jun,Ge Fei
Waterborne microbial contamination represents a significant global environmental challenge. Microorganisms can induce water pollution, precipitating infectious disease outbreaks and posing a substantial threat to human health. Currently, the excessive use of conventional antibiotics has resulted in the emergence of bacterial resistance, posing a challenge to the design and development of antimicrobial agents with high antibacterial efficacy in diverse water such as rivers, lakes, and wastewater from microbiology laboratories. Bimetallic nanomaterials, that amalgamate the distinctive characteristics of diverse metals, are garnering attention due to their synergistic properties. In this study, PVP-FeMo 2 S 3 (PVP: Polyvinylpyrrolidone) and PVP-ZnMo 2 S 3 nanocrystals were synthesized by a high-temperature reaction. The prepared nanocrystals exhibited excellent biocompatibility, regular morphology, long-term stability, and remarkable antibacterial effects. The bacterial biofilms could be eradicated by the combination of photothermal (PTT) and photodynamic synergistic effects of PVP-FeMo 2 S 3 and PVP-ZnMo 2 S 3 nanocrystals. PVP-ZnMo 2 S 3 nanocrystals exhibited enhanced PTT conversion efficiency for water treatment. Remarkably, even after 20 cycles of recycling, PVP-ZnMo 2 S 3 retained substantial antibacterial efficacy. The excellent biosafety of PVP-ZnMo 2 S 3 further guarantees the safety of water quality post-treatment. Thus, PVP-ZnMo 2 S 3 bimetallic nanocrystals can serve as a novel antimicrobial agent for the treatment of microbial contamination in water. This study offers a potential strategy to mitigate secondary water pollution and prevent the development of drug resistance among pathogenic microorganisms.
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ACS Applied Bio Materials
·
2025
·
IF 4.7
Sihui Yang,Pengfei Li,Ting Wang,Yanjiao Lan,Xiaoyu Peng
A biodegradable, antioxidant smart film was prepared using a solution casting method. Anthocyanins in purple sweet potato extract (PSPE) were added to guar gum (GG), chitosan, and polyvinylpyrrolidone matrices as antioxidants and smart pH indicators to determine the freshness of meat products. The resulting GCPP films were characterized, and the mechanical, antibacterial, and antioxidant properties of the films were measured. Cytotoxicity assays confirmed the nontoxic nature of the material, complying with food contact material standards. Furthermore, shrimp freshness monitoring tests validated its practical application potential. As the basic skeleton of the smart film, GG endowed toughness and ductility. Minimal amounts of PSPE were evenly distributed in the film, forming hydrogen bonds with the matrix molecules, and the cross-section of the smart film was smooth and continuous. PSPE improved matrix compatibility and minimally affected the hydrophilicity of the film. As the PSPE content increased, the opacity of the GCPP film increased from 3.91 ± 0.01 to 4.30 ± 0.05, and the UV-blocking rate increased from 61.10% to 99.99%. The elongation at break increased from 24.44% to 38.26%, while the tensile strength decreased from 41.71 ± 3.22 MPa to 35.42 ± 1.84 MPa. Moreover, the GCPP film was highly sensitive to pH changes. For example, in the shrimp freshness test, the GCPP film changed from meat-pink to brownish-yellow when the volatile base nitrogen was 18.24 mg/100 g. Therefore, this study provides an effective method to prepare smart films that are environmentally friendly indicators of food freshness.
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高影响因子
Advanced Sustainable Systems
·
2024
·
IF 6.5
Jiawei Zhou,Ming Liu,Shiyang Bai,Jihong Sun,Jia Wei,Ju Wang
The MOF-5@clinoptilolite (MOF@CP) composites are successfully synthesized using polyvinylpyrrolidone (PVP) for adsorption separation of CO 2 /CH 4 , CO 2 /N 2 , and CH 4 /N 2 . The effects of the PVP amounts on the dispersity of MOF-5 on CP random lamellas of the MOF@CPs are evaluated via various characterizations. Meanwhile, their single-component gas adsorption isotherms, breakthrough experiments, and cycling test are measured. The results elucidate that the used PVP amount has a significant influence on the particle size and the uniformity of MOF-5 dispersed on CP random lamellas. The MOF-5-loaded amount in MOF@CP is estimated to be up to 42.52 wt.%. Especially, the surface fractal evolutions indicated the surfaces of MOF@CP became from rough to smooth with the increase of PVP. The CO 2 /CH 4 , CO 2 /N 2 , and CH 4 /N 2 selectivity factors of MOF@CP are higher than that of CP, displaying a better separation performance. Their cycling test revealed that MOF@CPs could be used repetitively, highlighting efficiency for CO 2 and CH 4 separation. Meanwhile, the MOF-5@CP stability under moisture is preliminarily investigated, showing higher moisture resistance stability than MOF-5. Additionally, the grand canonical Monte Carlo simulations demonstrated the adsorption separation mechanism of the prepared MOF@CPs.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
·
IF 8.5
Nasim Ullah,Adeel Ahmed,Muhammad Adnan,Raza Ullah,Muzamil Ahmad,Ikram Ullah,Muhammad Rashid,Qian Zhang,Muhammad Fayaz,Bing Yu,Hailin Cong
In this particular investigation, zinc chloride ZnCl 2 was utilized as activating agent in the process to produce activated carbon from vegetable waste of okra. The AC was further incorporated into calcium carbonate and polyvinylpyrrolidone/sodium alginate polymer to prepare modified activated carbon based composite hydrogel beads adsorbent (Ca-ACHB). This adsorbent was utilized to remove methylene blue (MB) from water. The (Ca-ACHB) adsorbent was characterized used different analytical instrument like Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), thermogravimetric (TGA), Brunauer-Emmett-Teller (BET) and X-ray photoelectron spectroscopy (XPS). The batch adsorption test was utilized in order to ascertain the removal of MB. The BET specific surface area of (Ca-ACHB) was 3.21 mg 2 /g and total pore volume of 0.015 m 3 /g. A sequence of adsorption assessments was conducted at a range of different conditions, including pH (2–11), dosage (0.0025–0.020 g), time (5–360 min), initial concentration (25–150 mg/L) as well as temperature (298–318 K). Whereas kinetic study is well-defined by pseudo-2nd order (R 2 = 0.884). This shows that chemisorption process take place on (Ca-ACHB) adsorbent surface. The Freundlich isotherm (R 2 = 0.987) was better followed by the equilibrium data which specified that multilayer adsorption occurred on (Ca-ACHB) adsorbent. The maximum absorption capacity of adsorbent was 119.92 mg/g using 100 mg/L of MB concentration. The acknowledged outcomes from Gibbs free energy (ΔGᴼ) and enthalpy (ΔHᴼ) constants was −1.83 to −2.17 and 4.98 kJ/mol respectively. These outcomes indicated that adsorption process was endothermic and spontaneous. The reusability of the (Ca-ACHB) adsorbent was examined across various regeneration cycles.
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JOURNAL OF HAZARDOUS MATERIALS
·
2022
·
IF 14.224
Kunkun Wang,Yi Ma,Binbin Sun,Yi Yang,Yinqing Zhang,Lingyan Zhu
Silver nanoparticles (AgNPs) are usually capped with stabilizing agents to protect their activities and improve stability. Polyvinylpyrrolidone (PVP) is one of the most used capping agents of AgNPs, and may affect the transport of AgNPs in porous media . The transport and retention of AgNPs capped with PVPs of different molecular weights (PVP10-AgNP, PVP40-AgNP and PVP360-AgNP) in uncoated, and humic acid (HA)-, kaolinite (KL)- and ferrihydrite (FH)-coated sand porous media were investigated. Among the three AgNPs, PVP360-AgNP exhibited the highest mobility and eluted from all types of porous media. This is because PVPs of higher molecular weight provided stronger steric effect and electrostatic repulsive forces among PVP-AgNPs, inducing stronger blocking and shadow effects. The transport of the PVP-AgNPs increased in the HA-Sand columns, while decreased in the KL- and FH-Sand columns, especially for PVP10-AgNP and PVP40-AgNP. The simulation results using one-site kinetic model indicated that HA-Sand reduced the maximum retention capacity ( S max ), while KL- and FH-Sand increased the S max as well as the first-order attachment rate coefficients ( k att ), particularly at high ionic strength. The results shed light on the interplay of the capping agents of AgNPs and the surface heterogeneity on the transport of AgNPs in porous media.
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ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Ting Dong,Jin Zhao,Ge Li,Fu-Cheng Li,Qing Li,Su Chen
All-inorganic halide perovskite nanocrystals (PNCs) have received increasing attention due to their excellent optical properties. However, the inherent instability and the large amount of volatile organic compounds during the production process have severely limited their applications. In this research, we employed the microfluidic electrostatic spinning method to synthesize polyvinylpyrrolidone (PVP)-based PNC (CsPbBr3/PVP) powders directly by spinning chemistry, where the fibers serve as reactors. Thus, 20.1 g of CsPbBr3/PVP powders was obtained, which exhibits good fluorescent properties and high stability. Based on these excellent properties, several new applications were explored, including 3D printing, direct encapsulants for light-emitting diodes, and fluorescent coatings. It should be noted that the powder showed distinct advantages in 3D printing, allowing the fabrication of a series of fluorescent patterns, which offers a new candidate for fluorescent 3D printable materials. This work not only opens up an optimal way for facile production of fluorescent powders by the spinning chemistry strategy, but also provides a new perspective for various application directions, especially for 3D printing.
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2023
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IF 22.1
Haoyue Li,Na Wang,Han Li,Ziqiu Ren,Wenjie Ma,Jun Li,Yunchen Du,Qun Xu
Fe-based N-doped carbon catalysts (Fe/NC-XPVP) are synthesized through a solvent-free and one-step pyrolysis strategy, allowing for the control of Fe active center sizes and the morphology of carbon substrates. The variable-sized Fe active centers in Fe/NC-XPVP exhibit size-dependent catalytic behavior in peroxymonosulfate (PMS) activation reaction, which indicates that downsizing Fe particles to atomic level achieves performance improvement and mechanism transformation from radical to non-radical pathway. The optimal Fe/NC-1.0PVP catalyst can realize nearly 100.0 % of tetracycline degradation efficiency within 30 min. Density functional theory calculations demonstrate that the strong adsorption of PMS onto Fe-N 4 sites can promote the formation of catalyst/PMS* complexes and induce the occurrence of electron transfer process, which performs great resistance to complex water environments during PMS activation. This work gives valuable insights into the precise design and regulation of metal active sites on N-doped carbon materials and provides a promising catalyst for wastewater remediation.
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MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 4
·1-11
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IF 5.3
Mei Lin,Wei Bingjie,Liu Chunyan,Zhao Mengting,Cui Tian,Wei Xiangyang
A highly efficient colorimetric sensor was developed for detecting glutathione using polyvinylpyrrolidone-stabilized ultra-small Fe 3 O 4 nanoparticles integrated with graphene oxide (GO-Fe 3 O 4 ). These nanoparticles are highly water-dispersible and uniformly distributed, enabling extensive interaction with the analyte and enhancing detection sensitivity. The integration of Fe 3 O 4 nanoparticles on the graphene oxide surface prevents aggregation and exposes more active sites, thereby enhancing their catalytic activity significantly. The GO-Fe 3 O 4 nanocomposites exhibit a dramatically enhanced Fenton reaction, showing a fourfold increase in catalytic effect compared to bare Fe 3 O 4 nanoparticles. This is attributed to the synergistic peroxidase-like activity within the 3,3′,5,5′-tetramethylbenzidine (TMB)-hydrogen peroxide colorimetric system. Moreover, the GO-Fe 3 O 4 nanozyme has an excellent binding affinity to TMB, which is up to tenfold higher than that of horseradish peroxidase. The TMB is catalyzed by the GO-Fe 3 O 4 nanozyme to produce a blue oxidized form, and the presence of glutathione selectively inhibits this color change. This inhibition forms the basis for the quantitative determination of glutathione. Under optimal conditions, the colorimetric sensor demonstrated a linear response to glutathione concentrations ranging from 0.1 to 10 μmol/L, with a detection limit as low as 9.17 nmol/L ( S/N = 3). The developed method showcased excellent selectivity, reproducibility, and accuracy. It was effectively used to determine glutathione in rat serum samples and monitor its pharmacokinetics in vivo. Graphical
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Kaiyue Song,Lingling Du,Guoli Yue,Tao Li,Haohong Li,Shoutian Zheng,Zhirong Chen,Huidong Zheng
The study about simultaneously enhancing the resistive switching level and ambient-air-stability of perovskite-based memorizers will promote its commercialization. Here, a new 3D perovskite (TAZ-H)PbBr 3 (TAZ-H + = protonated thiazole) has been fabricated as FTO/(TAZ-H)PbBr 3 /Ag device, which only exhibits binary memory performance with the high tolerant temperature of 170 °C. After encapsulating by polyvinylpyrrolidone (PVP), the (TAZ-H)PbBr 3 @PVP composite-based device can demonstrate ternary resistive switching behavior with considerable ON2/ON1/OFF ratio (10 5.9 : 10 3.9 :1) and high ternary yield (68 %). Specially, this device presents good ambient-air stability at RH 80 % and thermal tolerance of 100 °C. The binary resistive switching mechanism can be ascribed to the halogen ion migration induced by bromine defects in the (PbBr 3 ) n n – framework. But the ternary resistive switching phenomenon in the (TAZ-H)PbBr 3 @PVP-based device could be depicted as the carrier transport from filled traps of PVP to (PbBr 3 ) n n – framework (ON1 state) and then carriers flowing in the re-arranged (TAZ-H) n n + chain in 3D channels (ON2 state). The PVP treatment can not only modify the grain boundary defects, but also facilitate the transport of injected carriers to the perovskite films via Pb-O coordinated bonds and inhibition of order-disorder transformation. This facial strategy for implementing ternary perovskite-based memorizers with good ambient-air-stability is quite meaningful for high-density memory in harsh environments.
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JOURNAL OF POWER SOURCES
·
2021
·
IF 9.127
Jianhua Zhang,Linbin Tang,Yu Zhang,Xiaoqiang Li,Qunjie Xu,Haimei Liu,Zi-Feng Ma
Na 4 Fe 3 (PO 4 ) 2 P 2 O 7 is considered to be a practical cathode material due to the wide source and low price of raw materials. However, the inherent isolation properties of the PO 4 3− group result in low electronic conductivity and, subsequently, a low discharge capacity and poor cycling stability. Herein, polyvinylpyrrolidone assisted electrospinning method is used to synthesize Na 4 Fe 3 (PO 4 ) 2 P 2 O 7 nanoparticles embedded in carbon nanoribbons . The network structure of active materials wrapped in crosslinked carbon nanoribbons not only enables the ultra-fast transfer of electrons on the three-dimensional “highway” between the nanoparticles but also inhibits the aggregation of nanoparticles. These nanoribbons exhibit remarkable electrochemical performance, resulting from their exceptional electronic and ionic conductivity : high capacity of 128.6 mAh g −1 at 0.1C (1 C = 128.9 mAh g −1 ), extra-high rate capability (61.2 mAh g −1 at 50 C), and ultra-long cycle (72% capacity retention after 5000 cycles at 50 C). Meanwhile, Na 4 Fe 3 (PO 4 ) 2 P 2 O 7 nanoribbon also shows excellent low temperature properties. At −15 °C, the nanoribbon delivers 84.5 mAh g −1 of discharge capacity at 0.05C and displays long-term cycle performance (80.8% capacity retention after 700 cycles at 0.5C). Therefore, the Na 4 Fe 3 (PO 4 ) 2 P 2 O 7 nanoribbon with excellent electrochemical performance can be considered an attractive cathode electrode for the commercialization of sodium-ion battery.
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