Coatings
·
2025
·Vol. 15
·期 3
·267
·
IF 2.8
Junyu Liu,Hansheng Li,Wencan Cui,Shihua Sang,Liang Guan,Chen Zhao
This study focuses on the preparation of a highly active surface-enhanced Raman spectroscopy (SERS) substrate, where Ag nanoparticles synthesized by the Lee–Meisel method are loaded onto the surface of GO@PVP nanoparticles through classical electrostatic attraction. The substrate was characterized by SEM and XPS analysis. The SERS-active substrate was utilized for the detection of phenanthrene in aqueous solutions, achieving a detection limit of 10−8g/L (5.6 × 10−11mol/L). In comparison to conventional Raman spectroscopy, this method exhibits a significant reduction in the detection limit and holds promise for trace polycyclic aromatic hydrocarbons (PAHs) monitoring in environmental samples.
研究领域:
材料科学
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环境科学
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分析化学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Na Wang,Qilin Liu,Bo Xie,Xuechun Huang,Dan Xiao
Cr(VI) pollution severely threatens the water environment and human health. One of the effective ways to solve this problem is to develop environmentally friendly and efficient adsorbents. This paper proposes a highly efficient Cr(VI) adsorbent based on tannic acid coating PVA/PVP/PEI nanofibrous membrane. The adsorbent is environment-friendly and has satisfying water stability and adsorption performance. The optimum preparation conditions, adsorption conditions, and the influence of ionic strength and coexisting ions were investigated comprehensively. Through the study of adsorption kinetics and isotherms, the adsorption of Cr(VI) on the nanofibrous membrane was found following the pseudo-second-order kinetics model, and the adsorption isotherm model following the Langmuir model. The maximum adsorption capacities were 631.97 mg/g, 667.52 mg/g, and 695.04 mg/g at 298 K, 308 K, and 318 K, respectively. After adsorption of Cr(VI), the membrane can be converted to high purity Cr 2 O 3 by calcination. The tannin-coated PVA/PVP/PEI nanofibrous membrane is a promising adsorbent because it can efficiently adsorb Cr(VI) and convert highly toxic Cr(VI) into hypotoxic Cr(III).
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Hamada A.A. Noreldeen,Xiang-Ping Zhang,Kai-Yuan Huang,Hua-Ping Peng,Gang-Wei Wu,Hao-Hua Deng,Wei Chen
Because of the significant threats to human health and ecological stability, the detection and identification of tetracycline antibiotics (TCs) have attracted increasing attention. Given the significance and difficulties related to TCs detection, in this study, we found that the addition of silver (Ag) to polyvinylpyrrolidone/2-mercapto-1-methylimidazole-gold nanoclusters (PVP/MMI-AuNCs) for the formation of PVP/MMI-AuAgNCs can result in enhanced fluorescence of PVP/MMI-AuNCs. The results demonstrate that the prepared solution exhibits diverse emission characteristics and distinct fluorescence responses to TCs, namely tetracycline (TET), oxytetracycline (OTC), doxycycline (DOX), and minocycline hydrochloride (MH). Based on these findings, a three-channel sensing platform was constructed and applied for the detection of different TCs by helping linear discriminant analysis (LDA) within a concentration range of 0.1–100 μg/mL. Additionally, the feasibility of applying this method to real samples (mainly, tap water and lake water samples) was considered. Remarkably, the limit of detection (LOD) values for TET, OTC, DOX, and MH were determined to be 85, 56, 171, and 32 ng/mL, respectively. Furthermore, the approach exhibited robust anti-interference capabilities and achieved a 95 % accuracy in identifying different TCs in 20 unknown samples. Therefore, our approach utilizing a single probe with rich fluorescence emission characteristics holds promise for TCs detection across various applications. Notably, this method offers the advantages of convenience, versatility, and universality, making it a valuable tool for environmental monitoring and ensuring food safety.
研究领域:
分析化学
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环境科学
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食品安全
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2021
·
IF 6.583
Xue-Feng Shao,Sheng Yang,Jia-Cheng Lin,Hao-Ran Teng,Li-Wu Fan,Justin NingWei Chiu,Yan-Ping Yuan,Viktoria Martin
The supercooling effect is deemed to be a crucial issue for thermal energy storage using phase change materials (PCMs). The exploration of promising additives plays a decisive role in effective suppression efforts for suppressing the supercooling effect of a PCM. The present work proposed a potential additive, polyvinylpyrrolidone (PVP), to reduce the supercooling of erythritol, which is the most promising polyol PCM candidate for medium temperature range. PVP with various loadings was dispersed in erythritol to make composites for the proof-of-concept tests. It was shown that the degree of supercooling of erythritol can be reduced significantly from over 64 °C to about 21 °C in the presence of only 1.0 wt.% PVP. Along with the mitigated supercooling effect, the addition of PVP also leads to an increase of the retrievable latent heat during crystallization, from ∼187 J/g to ∼224 J/g at the same minute PVP loading of 1.0 wt.%, by increasing the crystallinity of erythritol. The PVP-loaded erythritol composites exhibit little sacrifice in latent heat of fusion, i.e., only ∼15% loss when the PVP loading reaches 6.0 wt.%. In addition, multiple tests confirmed that PVP can be dissolved in erythritol, thus desirable compatibility was obtained and the composites would have long-term reliability. This proposed additive enables an efficient and cost-effective way for improving the crystallization behaviors of erythritol (and other polyol PCMs) towards real-world applications.
研究领域:
材料科学
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热能工程
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能量存储
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DOI
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2025
·
IF 2.6
Li Fangrun,Chen Haibo,Li Hang,Hu Jing,Zhang Jianli,Chen Qiang,Hou Guangya,Zhang Gang,Tang Yiping
Polyolefin separators are widely used in commercial lithium-ion batteries (LIBs), but their inherent limitations, such as poor thermal stability and low electrolyte wettability, restrict the further improvement of LIB performance. This paper presents a novel process for recovering and preparing submicron level AlOOH (boehmite) from the waste liquid of aluminum electrolytic capacitors. In addition, AlOOH/PVP@PP composite separators were prepared by utilizing polyvinylpyrrolidone (PVP), which has high thermal stability, as a binder, which significantly improves the thermal stability and electrochemical performance of lithium-ion batteries. The results of the study showed that the incorporation of polyvinylpyrrolidone (PVP) binder and AlOOH greatly improved the thermal stability of polypropylene (PP) separators. The thermal shrinkage of the AlOOH/PVP@PP separator at 180 °C was significantly reduced from 10.1% to 1.5% compared to the AlOOH/PVDF@PP separator fabricated with the conventional binder, while the structure of the AlOOH coating remained unchanged without significant changes. In addition, the voids between the AlOOH particles in the coating help to improve the containment of the electrolyte, which significantly improves the wettability of the separator. More importantly, the strong polarity of the PVP binder enhances the wettability of the separator to the electrolyte, improves the lithium-ion migration efficiency in the AlOOH/PVP@PP separator, and raises the ion transfer number from 0.447 to 0.661, thereby improving the electrochemical performance of the battery. Graphical This study leveraged the waste liquid from aluminum electrolytic capacitors to synthesize submicron-sized boehmite (AlOOH). It further employed PVP-a thermally stable binder with strong adhesion to both PP and AlOOH-to fabricate the AlOOH/PVP@PP composite separator. This innovative composite separator substantially enhanced the safety and electrochemical performance of the battery.
研究领域:
材料科学
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电化学
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储能
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纳米技术
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电池技术
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Environmental Research and Public Health
·
2021
·Vol. 18
·期 23
·12339
·
IF 3.39
Chengzhi Zhou,Yanlong Sun,Fan Zhang,Yuandong Wu
The photocatalytic degradation of minocycline was studied by using polyvinylidene fluoride–polyvinylpyrrolidone–TiO2(PVDF–PVP–TiO2) fiber mats prepared by an electrospinning technology. The influences of the TiO2dosage, minocycline concentrations, inorganic anions, pH values, and dissolved organic matter (DOM) concentrations on the degradation kinetics were investigated. A mass of 97% minocycline was degraded in 45 min at 5% TiO2dosage. The corresponding decomposition rate constant was 0.069 min−1. The inorganic anions affected the minocycline decomposition in the order of HCO3−> Cl−> SO42−> NO3−, which was confirmed by the results of electron spin resonance (ESR) spectra. The lowest electrical energy per order (EEO) was 6.5 Wh/L. Over five cycles, there was no change in the photocatalytic performance of the degrading minocycline. Those investigations suggested that effective degradation of minocycline could be reached in the PVDF–PVP–TiO2fiber mats with a low energy consumption, good separation and, good recovery. Three photocatalytic decomposition pathways of minocycline were proposed: (i) hydroxyl substitution of the acylamino group; (ii) hydroxyl substitution of the amide group, and (iii) a cleavage of the methyl groups and further oxidation of the amino group by OH. Potential risks caused by TP159 and TP99 should not be ignored, while the TP90 are nontoxic. Tests indicated that the toxicity of the photocatalytic process may be persistent if minocycline and its products were not mineralized completely.Keywords:electrospinning;minocycline;photocatalytic oxidation;PVDF–PVP–TiO2fiber mats;degradation mechanism
研究领域:
环境科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Chunhui Wu,Qingwei Ping,Xueru Sheng,Na Li,Bing Wang,Jian Zhang
During the reprocessing of irradiated nuclear fuel, radioactive iodine vapor—a hazardous substance threatening environmental safety and human health—is released in substantial quantities, creating an urgent need for adsorbents with high-efficiency iodine trapping capabilities. This study synthesizes BiOBr aggregates via hydrothermal method and loads them onto a three-dimensional (3D) porous aerogel, which is composed of crosslinked polyvinylpyrrolidone (PVP) and polyvinyl alcohol (PVA) (denoted as Bi@PVP/PVA). Compared with Bi@PVP and Bi@PVA, Bi@PVP/PVA shows significantly enhanced iodine adsorption performance: Bi@PVP/PVA-3, featuring a well-developed 3D porous network with optimized pore structure, achieves an exceptional iodine trapping capacity of 2482.2 mg/g at 85 °C, outperforming the single-polymer-supported counterparts. Characterizations confirm that crosslinking between PVP and PVA constructs a macroporous framework, which not only provides abundant sites for uniform loading of BiOBr aggregates but also facilitates iodine diffusion. Kinetic model analysis reveals the dual adsorption mechanism: the PVP/PVA porous network enables rapid trapping of iodine vapor, while chemical reactions between BiOBr and iodine ensure its firm immobilization. This synergistic effect of the carrier’s porous structure and the loaded BiOBr endows Bi@PVP/PVA aerogels with superior iodine treatment efficiency, highlighting their practical value in iodine capture during nuclear fuel reprocessing.
研究领域:
材料科学
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核工程
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2022
·
IF 8.035
Yeshuang Wang,Chao Yang,Chaonan Zhang,Mingxian Duan,Hui Wang,Huiling Fan,Yuankai Li,Ju Shangguan,Jianying Lin
Hierarchical porous MOF-199 with small crystal sizes was synthesized via PVP (Polyvinylpyrrolidone) regulation in an aqueous system, in which PVP acted as nucleating, coordination and template agent. The ambient desulfurization performance of the obtained MOF-199 regulated with different PVP amounts toward CH 3 SCH 3 and H 2 S and their structure-performance relationship were systematically studied. It is found that CH 3 SCH 3 was first chemisorbed on the surface of the adsorbent in a monolayer by weak coordination and then physisorbed in multilayers. This whole process was reversible and the structure of MOF kept stable. The hierarchical pores plus the small crystal size of MOF-199-P 1 , especially to the latter, endowed the uptake for CH 3 SCH 3 reaching 88.1 mg S/g, 42% higher than that of pristine MOF-199. However, the adsorption of H 2 S by MOF-199 is chemical and the collapse of the MOF structure was observed. The hierarchical porous structure helped H 2 S access as many active sites as possible before the blockage of pores caused by the structural damage. As a result, MOF-199-P 2 achieved the optimum breakthrough capacity of 74.3 mg S/g towards H 2 S, 34 % higher than the bare MOF-199. This study provides new strategies and insights for the adsorption process between sulfide and adsorbents in different reaction modes.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
Journal of Physical Chemistry Letters
·
2024
·
IF 4.8
Chuanyu Fu,Mengjiao Pei,Hangyuan Cui,Shuo Ke,Yixin Zhu,Changjin Wan,Qing Wan
Nanofiber neuromorphic transistors are regarded as promising candidates for mimicking brain-like learning and advancing high-performance computing. Composite nanofibers (CNFs) typically exhibit enhanced optoelectronic and mechanical properties. In this study, indium–gallium–zinc oxide (IGZO)/polyvinylpyrrolidone (PVP) CNFs were synthesized, and the neuromorphic transistor was integrated on both rigid and flexible substrates. The learning behavior, characterized by the transition from short-term plasticity (STP) to long-term plasticity, was achieved through photoelectric stimulation of the rigid neuromorphic transistor. The nonlinear STP was simulated by the flexible neuromorphic transistor through electrical pulses, matching effectively with a reservoir computing (RC) system. Hand gesture recognition with little energy consumption (49 pJ per reservoir state) and a maximum accuracy of 92.86% has been achieved by the RC system, proving the substantial potential of the IGZO/PVP CNF neuromorphic transistor for wearable intelligent processing tasks.
研究领域:
神经形态工程
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纳米技术
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光电子学
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人工智能
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柔性电子学
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储层计算
✓ 已验证
DOI
高影响因子
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
·
2021
·Vol. 96
·期 8
·2298-2309
·
IF 3.174
Shizi Luo,Xinyan Xiao,Yi Wang,Mingli Lu
BACKGROUND The commonly used RhB dye is a carcinogen that is widely found in environmental matrices and poses a threat to aquatic biota and human health. However, conventional wastewater treatment processes do not effectively remove low concentrations of these pollutants. Herein, the P-Bi 4 O 5 Br 2 /AgI (PBA) heterojunction was synthesized via a polyvinylpyrrolidone (PVP)-assisted solvothermal and precipitation method in this work. RESULTS The photocatalytic efficiency of the PBA heterojunction was evaluated by degrading rhodamine B (RhB) with the irradiation of simulated sunlight. P-Bi 4 O 5 Br 2 /AgI-50 (PBA-50, the mass fraction of AgI in the composite was 50%) composite could degrade 98% RhB under 90 min irradiation of 500 W Xenon lamp, and its pseudo first-order reaction rate constant was 0.04265 min −1 , which was 17.1, 2.16, and 2.94 times higher than that of Bi 4 O 5 Br 2 , P-Bi 4 O 5 Br 2 , and AgI, respectively. Besides, the effects of the dosage of photocatalyst and the anion on the photocatalytic degradation of RhB over PBA-50 were analyzed. CONCLUSION The enhanced photocatalytic activity of PBA was attributed to its better visible light capture ability, larger specific surface area, and faster photogenerated carrier separation efficiency, all of which were confirmed by scanning electron microscopy (SEM), Brunauer–Emmett–Teller (BET), UV-Vis diffues reflectance spectroscopy (DRS), X-ray photoelectron spectroscopy (XPS), and photoelectrochemical analysis. In addition, the free radical trapping experiments confirmed that ·O 2 − and h + were the main active species for degradation of RhB. Additionally, the smaller bandgap and the more negative conduction band position of Bi 4 O 5 Br 2 were reached after the introduction of PVP. Accordingly, a possible type-II heterojunction photocatalytic mechanism of P-Bi 4 O 5 Br 2 /AgI was proposed. © 2021 Society of Chemical Industry (SCI).
研究领域:
环境科学
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材料科学
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光催化技术
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2017
·Vol. 28
·期 24
·18542-18550
·
IF 2.019
Wu Huating,Ding Xingeng,Li Wenqi,Ren Chunrong,Yang Hui
In this study, a magnetic Fe 3 O 4 /SiO 2 /BiOBr composite photocatalyst was controllably synthesized a PVP-assisted solvothermal method. The Fe 3 O 4 /SiO 2 /BiOBr composites are composed of many three-dimensional (3D) flower-like BiOBr microspheres loaded with many spherical Fe 3 O 4 particles. The formation mechanism and effect of PVP’s concentration on the products were investigated and proposed. Experimental results showed that PVP might act as a potential crystal plane inhibitor in the system as well as the stabilizer on the surface of BiOBr nanoplates. The Fe 3 O 4 /SiO 2 /BiOBr displayed high photocatalytic activity for the degradation of RhB under visible light irradiation, after which it can be easily recovered by applying an external magnetic field. Moreover, the as-prepared photocatalyst exhibited excellent stability and reusability in the cycled experiments.
研究领域:
材料科学
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环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
EUROPEAN POLYMER JOURNAL
·
2024
·
IF 5.8
Zhilei Li,Jianping Zhou,Yan Xu,Changhua Chen,Tongtong Ran,Shuaishuai Wang
The preparation of three electrodes (working electrode, counter electrode, reference electrode) on soft, deformable, and breathable film substrates with good adhesion is a novel approach for the development of wearable devices for plants. In this study, the adsorption energy of carbon paste, graphite, and a polymer was calculated via molecular dynamics simulations, and the optimal polymer ratio was selected for the preparation of nanofiber films. Electrospinning technology was used to prepare a breathable ultrathin polymer film, which was used as a flexible substrate for three electrodes, and a conductive carbon paste was patterned on the nanofiber film substrate by screen printing. The properties of the composite nanofiber membrane substrate and flexible screen-printing electrode were studied by scanning electron microscopy (SEM), infrared (IR) spectroscopy, X-ray diffraction (XRD), 3D profile scanning, and electrochemical experiments. The combination of electrospinning technology and screen-printing technology is a new path for the preparation of nondestructive and wearable detection devices.
研究领域:
材料科学
·
生物医学工程
·
电化学
✓ 已验证
DOI
高影响因子
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