COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
·
IF 4.9
Yongwei Cai,Yao Chen,Ruru Wang,Jianxiang Li,Hong Yang,Yuanju Li,Danni Qu
Developing a superhydrophilic/underwater oleophobic mesh membrane using an economical and eco-friendly method is still challenging to achieve high efficiency for oily wastewater separation. In this study, we proposed a novel approach to fabricate superhydrophilic/underwater oleophobic PVP/ZIF-8 coatings on stainless steel (SS) mesh using a low-cost and environmentally friendly electrodeposition method. The prepared PVP/ZIF-8@SS mesh membrane exhibited remarkable self-cleaning and anti-oil-fouling properties, along with a strong chemical robustness in extreme environments. Additionally, the mesh membrane demonstrated strong antimicrobial ability and excellent corrosion resistance property. The mesh membrane also showed promising potential in gravitational oil-water separation and oil recovery, achieving a separation efficiency of 99.0% and a water flux of 3.8 × 10 3 L·m −2 ·h −1 for rapeseed oil-water mixtures. Importantly, the PVP/ZIF-8@SS mesh membrane maintained exceptional separation efficiency, high water flux, and underwater oleophobicity properties even after undergoing 35 cycles of oil-water separations. The oil-water separation mechanism of the PVP/ZIF-8@SS mesh membrane suggested that the surface of the mesh membrane contained PVP/ZIF-8 particles with a significant negative charge. These particles preferentially interacted with positively charged water, facilitating the rapid passage of water phase through the pores, while impeding the permeation of negatively charged oil phase. This research provides an effective strategy for practical applications, including marine oil spill cleanup, oily wastewater treatment, and recycling of residual cooking oil in the restaurant industry.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2024
·
IF 20.2
Yunpeng Liu,Lei Gong,Jianglong Liu,Peng Xiao,Baotong Chen,Fei Xie,Caoyu Yang,Zhonghua Wu
The production of formic acid/formate from electrochemical CO 2 reduction reaction (CO 2 RR) is fascinating but challenging due to the lack of highly active electrocatalysts. Herein, uniform PVP-capped bismuth nanospheres (PVP@Bi-NSs) with a capping-bonding synergy were optimally fabricated to enhance the CO 2 RR to formate. This study unveils the reaction process in Bi-based solution. It was found that the formation of PVP@Bi-NSs experienced five stages of Bi-O 8 (I), Bi-O 3 (II), Bi-O 4 (III), Bi-Bi 6 (IV), and PVP@Bi-NSs (V), corresponding to the nucleation in precursor solution, Bi(OH) 3 precipitate, decomposition to KBiO 2 , reduction to metallic Bi, and PVP coating, respectively. By solvothermal treatment and simply modulating the KOH concentration in the precursor, the hydrophilic ends of PVP molecules can be well bonded to the Bi nanoparticles (Bi-NPs) to form a PVP-capping layer. Compared with the Bi-NPs without PVP coating, this uniform PVP@Bi-NSs displays a higher activity with a maximal Faradaic efficiency (FE) of 92.5 % and part current density ( J formate ) of 158.2 mA cm −2 at −0.9 V vs. RHE in the flow cell as well as excellent stability, which is comparable to the state-of-the-art Bi-based catalysts. The maximum J formate can reach 280 mA cm −2 with an FE of 87.3 % at −1.2 V vs. RHE, meeting the needs of industrial current density. Further characterizations show that the capping effect of PVP contributed to the uniform distribution of nanosized PVP@Bi-NSs, increasing the electrochemical surface areas (ECSAs) and the numbers of CO 2 RR active sites. The bonding effect of PVP to Bi-NPs enhanced the hydrophobic property of PVP@Bi-NPs, boosting the CO 2 absorption and suppressing the hydrogen evolution reaction (HER). DFT calculations reveal that this fabricated structure facilitates the generation of *OCHO intermediate and benefits formate yield. This work provides a fascinating strategy for the design of Bi-based catalysts, enabling interface engineering toward high-efficiency CO 2 RR.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2019
·
IF 3.973
Bingqian Guo,Jiulong Zhao,Chenyao Wu,Yuting Zheng,Changqing Ye,Mingxian Huang,Shige Wang
With an excellent near-infrared (NIR) light-responsive property, polypyrrole (PPy) nanoparticle has emerged as a promising NIR photothermal transducing agent for tumor photothermal therapy (PTT). Herein, we reported the PVP mediated one-pot synthesis of colloidal stable and biocompatible PPy nanoparticles (PPy-PVP NPs) for combined tumor photothermal-chemotherapy. The influence of molecular weight and PVP concentration on the spectroscopic characteristic, photothermal feature, drug loading performance, and antitumor efficiency of the resultant PPy-PVP NPs was systematically studied. By choosing PVP with a molecular weight of 360 kDa (concentration of 5 mg/mL) as the template and surface modifier during the synthesis, PPy-PVP NPs with optimal spectroscopic characteristic, photothermal feature, drug loading performance, and antitumor efficiency were synthesized. Findings in this study are anticipated to provide an in-depth understanding of the important character of surface engineering in the rational design and biomedical applications of PPy NPs.
研究领域:
生物医学工程
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材料科学
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肿瘤学
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产品关联
DOI
PubMed
高影响因子
Water
·
2016
·Vol. 8
·期 4
·134
·
IF 1.687
Mingquan Wang,Fangshu Qu,Ruibao Jia,Shaohua Sun,Guibai Li,Heng Liang
Steroidal estrogens are a representative type of endocrine-disrupting chemical contaminant that has been detected in surface water. In this paper, modified polyvinylidene fluoride (PVDF) membranes were prepared by adding different amounts of polyvinyl pyrrolidone (PVP) and nano-TiO2particles. PVDF-PVP membrane adsorption, UV photolysis and PVDF-PVP-TiO2membrane photocatalysis performance were investigated by considering the rejection of estrone (E1) and 17β-estradiol (E2) in the cross-flow filtration experiments. The mechanism of photocatalytic degradation on TiO2-doped PVDF membranes was also evaluated. The results from the study indicated that adding PVP and nano-TiO2appropriately in PVDF membranes could be an effective method for better E1and E2 rejection due to adsorption and photocatalytic degradation.Keywords:steroidal estrogens;estrone;17β-estradiol;PVDF-PVP-TiO2ultrafiltration membrane;photocatalysis;water
研究领域:
环境科学
·
生物学
✓ 已验证
产品关联
DOI
高影响因子
Frontiers in Chemistry
·
2022
·
IF 5.545
Sun Bingxia,Meng Yun,Song Tianlin,Shi Jieyun,He Xinhong,Zhao Peiran
Endogenic heat shock proteins and uneven local heat distribution are two main problems in traditional tumor hyperthermia therapy strategies. Aiming at solving these problems, we designed Au–SnSe–PVP nanomaterials (ASNPs) by modifying Au nanoparticles (Au-NPs) and biocompatible PVP on SnSe nanorods via a new reactive oxygen species production strategy. The ASNPs with excellent photothermal conversion performance can produce thermoelectric effects in response to temperature differences during photothermal conversion. The modification of Au-NPs can attract free electron (e–) to accumulate and promote the separation of e– and holes (h+) in the thermoelectric process, thereby further promoting e–-rich Au-NPs-induced H2O2 homolysis and h+–H2O half-reaction to generate hydroxyl radicals, realizing the synergistic application of photothermal therapy and pyroelectric dynamic therapy in tumor treatment.
研究领域:
生物医学工程
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肿瘤学
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纳米医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2018
·Vol. 18
·期 4
·2914-2920
·
IF 1.354
Li Jie,Zhang Jia,Chen Lianxi,Wang Yu,Liu Zhenhui
A new effective surface poly(1-vinyl-2-pyrrolidone) (PVP) grafted layer protected selective etching strategy has been used for preparing vinyl functionalized porous silica nanospheres (V-PSNSs). The main reaction mechanism was relied on the vinyl groups distributed on the surface of
outer vinyl silica nanospheres (V-SiO2) which can be polymerized with another vinyl monomer, such as 1-vinyl-2-pyrrolidone (VP), in the presence of initiator. It was observed from the research results that only grafting PVP on the surface of outer vinyl silica nanospheres (V-SiO2)
can V-PSNSs be obtained, because grafting PVP was able to protect outer V-SiO2 from being etched prior to inner pure silica (sSiO2). In addition, effect of the amounts of sSiO2@V-SiO2 as another monomer substrate on the formation of PVP grafted sSiO2@V-SiO2
(sSiO2@V-SiO2/PVP) was discussed. The results showed that the less of the sSiO2@V-SiO2 amounts, the thinner of the PVP grafted layer on the surface of sSiO2@V-SiO2, the poorer protection ability of the surface. In the present
study, V-PSNSs with 29 m2g−1 of BET surface areas and 0.1 cm3g−1 pore volumes were successfully synthesized by grafting 0.3 g of VP on the surface of 0.3 g of sSiO2@V-SiO2 and subsequent etching.
研究领域:
材料科学
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化学工程
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF ANALYTICAL CHEMISTRY
·
2024
·Vol. 79
·期 4
·400-411
·
IF 1
Xing Yanyan,Chen Meiling,Lan Huining,Zhang Sijia,Xu Jiabi,Hou Xiaohong
Abstract Considering the application prospects of a cascade catalytic system in biomedical analysis, it remains significant to develop a cascade catalytic system for one-step rapid colorimetric detection. Herein, PVP/NH 2 -MIL-101(Fe) possessing enhanced peroxidase ( POD )-like activity was successfully synthesized by microwave-assisted and polyvinylpyrrolidone ( PVP ) modification strategies. Then, PVP/NH 2 -MIL-101(Fe) and glucose oxidase ( GOx ) were covalently coupled via the bifunctional cross-linker glutaraldehyde, the GOx@PVP/NH 2 -MIL-101(Fe) with dual enzymatic functional activities (POD-like and GOx activities) was subsequently synthesized. GOx@PVP/NH 2 -MIL-101(Fe) had strong affinities for the substrates glucose, 3,3',5,5'-tetramethylbenzidine, and hydrogen peroxide. Based on this specific nanozyme GOx@PVP/NH 2 -MIL-101(Fe), a one-step colorimetric assay for rapid glucose determination was built. This detection method not only took 20 min to analyze but also possessed a linear range of 10–250 µM with a detection limit of 1.05 µM. Furthermore, the cascade catalytic system was applied to determine glucose concentrations in human serum samples. Compared with commercial blood glucose meters, the proposed method was also accurate and effective, making it a candidate method for determining blood glucose.
研究领域:
生物医学分析
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材料科学
·
酶工程
✓ 已验证
DOI
高影响因子
Science China-Technological Sciences
·
2015
·Vol. 58
·期 5
·881-888
·
IF 1.192
Yang AiLing,Li ShunPin,Wang YuJin,Wang LeLe,Bao XiChang,Yang RenQiang
Ag@Cu 2 O core-shell metal-semiconductor nanoparticles (NPs) were prepared by using solution phase strategy. It was found that Ag@Cu 2 O core-shell NPs were easily converted to Ag@Cu bimetallic core-shell NPs with the help of surfactant PVP and excessive reducer ascorbic acid in air at room temperature, which is a unique phenomenon. Varying volumes of Ag colloidal solutions were added into the reaction mixtures containing fixed initial concentrations of Cu 2+ and PVP, Ag@Cu 2 O and Ag@Cu core-shell NPs with fixed core size but varying outer shell thicknesses could be obtained. The composites, structures, morphologies and extinction properties of Ag@Cu 2 O and Ag@Cu core-shell NPs were systematically characterized by XRD, TEM and extinction spectra. Both of these NPs show wide tunable optical properties. The extinction peaks could be shifted from 421 nm to 700 nm. FTIR results reveal that Cu + ions on the surface of Cu 2 O nanocrystalline coordinate with N and O atoms in PVP and further are reduced to metallic Cu by excessive ascorbic acid and then form a nucleation site on the surface of Cu 2 O nanocrystalline. PVP binds onto a different site to proceed with the reduction until all the Cu sources in Cu 2 O NPs are completely assumed. And the shell of Cu 2 O is converted to Cu shell. The synthesis approach in this paper is simple and also a promising reference for synthesizing other core-shell NPs. Ag@Cu 2 O NPs can be easily converted to Ag@Cu NPs in air at room temperature, which is promising to be used in electronic devices.
研究领域:
纳米材料化学
·
无机功能材料
·
胶体与界面化学
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光谱学
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半导体物理
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2021
·
IF 5.316
Min Zhong,Lei Chai,Yijie Wang,Jing Di
The key to commercialization of organic‐inorganic lead halide perovskite solar cells (PSCs) is to achieve high photoelectric conversion efficiency (PCE) and long-term stability under ambient condition. In this paper, polymer mixture of polyvinylpyrrolidone (PVP) and polyethylene glycol (PEG) with appropriate mass ratio are incorporated into PbI 2 precursor solution in the preparation process of perovskite film via two-step sequential deposition method in air. The PCE of polymer mixture modified PSC based on ZnO@TiO 2 nanorod arrays is better than those of the PSC with single polymer（PVP or PEG）and the pristine one, and the PCE of 1.5 wt%PVP/0.5 wt%PEG modified device increased by 30% compared with that of the unmodified one, which is mainly a consequence of the better quality of perovskite film caused by the synergistic effect including the strong attraction between the C=O in PVP and Pb 2+ in perovskite, and the intense hydrogen bond between O atoms from PEG and H atoms in CH 3 NH 3 + . Moreover, polymer mixture modified PSC also represents better air stability compared with the device with single polymer or the pristine one，which is largely attributed to the exceptional hygroscopicity of PVP/PEG mixture, the synergistic stabilization of perovskite structure and inhibition of ion migration by the bondings between polymer mixture and perovskite. Furthermore, the mechanism of the interaction between PVP/PEG mixture and CH 3 NH 3 PbI 3 to increase the efficiency and stability of the PSC was also studied. Our work offers an effective additive to simultaneously improve the efficiency and stability of the PSCs in high humidity environment for further commercial application.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
Laser & Photonics Reviews
·
2025
·
IF 10
Xulan Xue,Chenhui Zhang,Huidan Zhang,Xingchen Lin,Yongqiang Ning,Lijun Wang,Wenyu Ji,Hongbo Zhu
The performance of a perovskite light-emitting diode (PeLED) is strongly dependent on the perovskite film quality. Among them, the buried interface plays a critical role in the crystallization dynamics of perovskite, directly determining the film morphology and optical properties. Herein, we demonstrate the buried interface engineering to regulate the crystallization kinetics of quasi-2D perovskite film by inserting a poly(vinyl pyrrolidone) (PVP) modification layer between the hole transport layer and perovskite film. The strategy enhances the surface wettability of the hole transport layer, facilitating the uniform coverage of perovskite. Meanwhile, the carboxyl groups in PVP can interact with undercoordinated Pb ions in perovskite to increase the crystallization sites, thereby effectively passivating defects, regulating phase distribution, and suppressing the formation of low-dimensional phases. Ultimately, a green PeLED treated with PVP modification layer has achieved a high external quantum efficiency of 24.2%, representing an 87% enhancement. Our results highlight the potential of interface engineering based on functional group interactions as an innovation strategy, enabling significant advances in PeLED efficiency.
研究领域:
材料科学
·
光电子学
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纳米技术
·
半导体器件
✓ 已验证
产品关联
DOI
高影响因子
ACTA PHYSICO-CHIMICA SINICA
·
2016
·Vol. 32
·期 9
·2318-2326
·
IF 0.844
LIU Shan-Shan,JI Shan,CHEN Qi-Bin,PENG Chang-Jun,LIU Hong-Lai
A supramolecular polymer brush composed of polyvinylpyrrolidone-cholesterol (PVP-Chol) was fabricated based on intermolecular hydrogen bonding between the ketone groups of the PVP moieties and the hydroxyl groups of the cholesterol, both in solution and at the air/water interface. These
confirmations were confirmed by Fourier transform infrared (FT-IR) spectroscopy, surface pressure versus molecular area (π-A) isotherms, and atomic force microscopy (AFM). At surface pressures up to 2.5 mN·m-1, the interfacial film was composed of cholesterol-enriched
regions and PVP-Chol nanofibril domains. Interestingly, oversurface pressures, the structure of the PVP-Chol-enriched domains evolved frominitial irregular shapes, to crescent and heart-shaped zones, and then to circular shapes. This transition indicated the controllability of such domains
during compression of a complex monolayer at relatively low surface pressures. Above 2.5 mN·m-1, the circular PVP-Chol domains disappeared and fibrous aggregates were formed at the air/water interface. The height of the comb-like PVP-Chol nanofibrils could be reversibly varied
between approximately 4.3 and 1.8 nm by adjusting the voltage applied to piezoceramics during the AFM scanning process. These results demonstrate that the reversible structural transformation of the PVP-Chol complex from cylindrical to elliptic cylindrical is induced by the applied force of
the AFM tip up to a value of 1.0 mN·m-1. These data provide important and useful information that improves our understanding of the relationship between the structures and performances of supramolecular polymer brushes, and should extend the range of applications of cholesterol-functionalized
polymers fabricated via a simple mixing strategy.
研究领域:
材料科学
·
表面化学
·
生物材料
✓ 已验证
DOI
高影响因子
FULLERENES NANOTUBES AND CARBON NANOSTRUCTURES
·
2025
·
IF 1.8
Yongfeng Zhao,Zhenyang Cao,Xiaochen Wu,Chunyan Sun
In this paper, a highly selective solid-phase composite fluorescent sensor (BCDS@PVP/PVDF) for detecting iodide ions (I−) was synthesized. This sensor was prepared by electrospinning carbon dots (CDs), polyvinylpyrrolidone (PVP), and polyvinylidene fluoride (PVDF) into a composite nanofiber membrane. Scanning electron microscope (SEM) morphology analysis indicated that the addition of carbon dots had no effect on the spun membranes. Fourier transform infrared spectrometer (FTIR) and X-ray photoelectron spectrometer (XPS) analyses demonstrated that the carbon dots were successfully loaded onto the electrospun membranes. The I− detection experiments demonstrated that the fluorescence quenching phenomenon occurred within the range of 0-100 mg/L, and a linear relationship was observed within the range of 0.3-0.5 mg/L. The detection limit was at 0.17 mg/L. The fluorescence quenching mechanism was initially attributed to dynamic quenching by UV absorption and fluorescence lifetime. This study provides a new approach for the development of portable fluorescence sensors for I− detection.
研究领域:
分析化学
·
材料科学
·
环境监测
·
生物传感
·
纳米材料
·
荧光分析
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）