Applied Nanoscience
·
2020
·Vol. 10
·期 6
·1845-1851
·
IF 2.88
Wang Tianxiong,Jiang Tiancai,Meng Xianquan
We found that the morphology of nanowires could be regulated by adding polyvinylpyrrolidone (PVP, K30) in hydrothermal synthesis of antimony sulfide (Sb 2 S 3 ) nanowires. The nanowires with length more than 20 μm were obtained by adding the proper amount of PVP. Three kinds of fully nanostructured photodetector using Sb 2 S 3 nanowires as active regions were fabricated and the first detector used silver nanowires as the electrodes at both ends, the second used silver nanowires as one electrode and MXenes as the another electrode, and the third used MXenes as both electrodes. The light response speed of the photodetector with both MXenes electrodes was improved greatly. The photodetector which used MXenes and silver nanowires as electrodes at two ends, respectively, showed the phenomenon of being self-driven. The mechanism of asymmetric hole migration was put forward to explain the effect of being self-driven.
研究领域:
材料科学
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纳米技术
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光电子学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Jianan Cui,Tingting Liu,Qian Zhang,Ting Wang,Xiaohong Hou
Various metal-based heterogeneous catalysts activated peroxymonosulfate for organic pollutants degradation are increasingly recognized as an environmentally important sewage treatment technology. In this study, polyvinyl pyrrolidone (PVP) modified Fe 3 O 4 loaded ZIF-67 magnetic catalyst with transition metal cobalt ion was prepared for the first time by microwave-assisted solvothermal (MS) method within 30 min to activate peroxymonosulfate. The microwave synthesis process changed the time-consuming shortcoming of conventional method. The catalytic activity of the synthesized Fe 3 O 4 -PVP@ZIF-67 was assessed on bisphenol F (BPF) removal. The result showed 99.8% BPF was removed under the conditions of catalyst content of 0.15 g·L −1 , PMS content of 0.3 mM, and pH without adjustment in 60 min. And the Fe 3 O 4 -PVP@ZIF-67/PMS system exhibited a quality catalytic performance when the solution pH of BPF varied from 3 to 11. Compared with humic acid (HA), inorganic anions (Cl − , H 2 PO 4 − , SO 4 2− , HCO 3 − , and CO 3 2− ) showed slight effect to the degradation system. The quenching experiment verified that the main active substance in this system was SO 4 − •. Based on the degradation intermediates identified by gas chromatography-mass spectrometer (GC–MS), the main degradation pathways were proposed for the degradation of BPF. Overall, Fe 3 O 4 -PVP@ZIF-67 as PMS activator is promising catalyst for sulfate radical-based wastewater treatment.
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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DOI
高影响因子
Materials Advances
·
2020
·Vol. 1
·期 4
·760-766
·
IF 0
Pin Song,Jun Di,Haiping Chen,Sirui Zhao,Cao Wu,Xun Cao,Meiling Wang,Jun Xiong,Xinli Ye
Three-dimensional (3D) aerogels have attracted more and more attention in oil–water separation, due to their advantages of low density, high porosity, and large specific surface area. However, their application is greatly limited due to their hydrophilic and low adsorption properties. In this work, we report a 3D MoS2–polyvinylpyrrolidone (PVP) aerogel, prepared by a freeze-drying method, where PVP was used as a skeleton to support the aerogel. As a surfactant, PVP can easily attach to the surface of MoS2 nanosheets and facilitate the interconnection between nanosheets. The 3D MoS2–PVP aerogel exhibits low density, high porosity, good hydrophobicity, and excellent adsorption capacity (195–649 times). Moreover, after 30 cycles, the structure of the 3D MoS2–PVP aerogel is well kept and the adsorption capacity is still retained, at 93.5% and 92.9%, by squeezing and distillation, respectively. Therefore, the obtained 3D MoS2–PVP aerogel is a promising adsorption material and has great practical application potential in oil–water separation.
研究领域:
材料科学
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环境工程
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化学工程
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产品关联
DOI
ORGANIC ELECTRONICS
·
2019
·
IF 3.495
Rashed Alsharafi,Yangbin Zhu,Fushan Li,Zhongwei Xu,Hailong Hu,Tailiang Guo
Zinc oxide (ZnO) nanoparticles (NPs) are extensively adopted material to be used as efficient electron transport layer (ETL) in quantum dot light emitting diodes (QLEDs) due to their suitable properties of high electron mobility , good stability, and easy processability. However, because of the naturally high work function of ZnO NPs, the electrons can be spontaneously transferred at the quantum dot/ZnO interface. In addition, the enormous difference in electron and hole mobility can lead to interfacial exciton quenching and unbalanced charge injection. In this paper, the strategy of replacing the ZnO in QLEDs with Mg and polyvinylpyrrolidone (PVP) inorganic-organic hybrid co-doped ZnO NPs are introduced. The energy band structures of ZnO NPs are tailored by tuning the concentrations of Mg, resulting in a significant suppression of the spontaneous charge transfer at the quantum dot/ETL interface. Furthermore, the surface quenching sites and the electronic mobility of ETL were adjusted via PVP doping. The proposed method significantly enhances the current efficiency and external quantum efficiency to 16.16 cd/A and 15.45%, respectively, an improvement of about 2.5-fold compared to the devices with pure ZnO NPs.
研究领域:
材料科学
·
光电技术
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Pengfei Li,Yingbo Chen,Fan Xiao,Ming Cao,Jingyu Pan,Jingfeng Zheng,Ke Zhao,Hao Li,Xianglin Zhang,Yuanyuan Zhang
The performance of proton exchange membranes (PEMs) can be enhanced by creating continuous proton conduction channels. In this work, PVP-UiO-66-NH-SO 3 H nanoparticles (PUNSNPs) were prepared and filled into sulfonated poly (ether ether ketone) (SPEEK) to fabricate PUNSNPs/SPEEK composite PEMs. To further improve the performance of the PEMs, phosphoric acid (PA) was doped and a continuous nanopore network was formed in PA/PUNSNPs/SPEEK porous PEMs due to the dissolution of PUNSNPs. The PA/PUNSNPs/SPEEK porous PEMs have high PA uptake ratio (96%–117 %) and dimensional stability thanks to the anchoring effect of the nitrogen-containing heterocyclic ring on the PVP chains. The acid-base pairing interaction between the chains (residual ligands from PUNSNPs) inside the unique continuous nanopore structure allows PA/PUNSNPs/SPEEK = 20 % porous PEMs to have the highest proton conductivity of 0.350 S cm −1 (80 °C/100 % RH). Furthermore, the PA/PUNSNPs/SPEEK porous PEMs retained PA up to more than 80 % (80 °C, 40 % RH, 7 days). Similarly, PA/PUNSNPs/SPEEK = 20 % porous PEMs immersed in deionized water for 45 days were able to maintain a proton conductivity of more than 83 %. Finally, PA/PUNSNPs/SPEEK porous PEMs have low methanol permeability . Thus, this study provides a new method for the preparation of porous PEMs with a continuous nanopore network structure and excellent performance.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
POLYMER
·
2021
·
IF 4.43
Chao Wang,Xipeng Song,Yawei Liu,Chunhua Zhang
Polyorganosiloxane (silicone)-contaminated wastewater is a typical chemical wastewater that causes serious environmental pollution, is difficult to treat and has a high separation cost due to its toxicity, high chemical stability, and low surface tension. To liminate this pollution, a low-cost ultrafiltration membrane with excellent separation properties was successfully fabricated. First, to prepare the membrane, an amphiphilic polymer of poly(vinyl chloride)-g-poly(vinyl pyrrolidone) (PVC-g-PVP) was synthesized by atom transfer radical polymerization (ATRP) over an inexpensive catalyst/ligand system of CuCl/benzyl dimethylamine (BDMA). Thereafter, the membrane was fabricated by regulating the aggregation of the PVC-g-PVP amphiphilic polymer in its casting solution by increasing the solution temperature. The surface smoothness and hydrophilicity of the resulting PVC-g-PVP membrane were better than those of the pristine PVC membrane. Furthermore, the separation and anti-fouling performances of the resulting membrane for silicone-contaminated wastewater were better than those of the pristine PVC membrane. The permeation flux presented an increment of approximately 233%, with a silicone rejection rate was of approximately 100%, and the flux recovery ratio of approximately 72.7% after three cycling tests, which was an increase of approximately 423%. The integration of inexpensive BDMA was used as ligand for the synthesis of PVC-g-PVP, and hydrophilic PVC-g-PVP membrane was fabricated by regulating the aggregation of the PVC-g-PVP in solution, this work provided a new way for the fabrication of amphiphilic polymer membrane with potential application in chemical wastewater remediation.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Ziyu Chen,Guixia Liu,Jingting Sui,Dan Li,Yan Song,Feng Hong,Xiangting Dong,Jinxian Wang,Wensheng Yu
Photothermal therapy (PTT) guided by bioimaging has attracted much attention. Recently, the multifunctional nanomaterials with multimodal imaging and high-performance therapy effect are extremely important. In this work, a novel nanostructure with Ag nanospheres (NSs) encapsulated Polyvinylpyrrolidone (PVP) film which decorated by Ba 2 GdF 7 :Yb 3+ , Ho 3+ nanoparticles is synthesized by a simple method. The novel nanostructure endows the NCs remarkable originality and excellent multifunctional performance. The morphology, structure, optical properties, biocompatibility, cytotoxicity, superparamagnetic properties and photothermal therapeutic efficiency of the Ag@PVP-Ba 2 GdF 7 :Yb 3+ , Ho 3+ nanocomposites (NCs) are investigated. The results show that Ag@PVP-Ba 2 GdF 7 :Yb 3+ , Ho 3+ NCs possess good upconversion luminescence (UCL) performance and X-ray computed tomography (CT) imaging ability. Furthermore, in MTT cytotoxicity measurement, the NCs exhibit low cytotoxicity and excellent biocompatibility. Moreover, the PVP film coating of the NCs can largely promote the stability. In addition, outstanding photothermal conversion ability and stability are also obtained upon NIR laser irradiation. Utilizing the prominent photothermal effect, PTT in vitro shows efficient photothermal killing effect on tumor cells. Therefore, Ag@PVP-Ba 2 GdF 7 :Yb 3+ , Ho 3+ NCs from multifaceted research provides a break to multifunctional nanomaterials for multimodal imaging detection and high-performance tumor photothermal therapy.
研究领域:
生物医学工程
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纳米医学
·
肿瘤学
✓ 已验证
产品关联
DOI
高影响因子
Colloid and Interface Science Communications
·
2023
·
IF 4.5
Chengyang Ban,Hanzhu Shi,Qiong Ding,Bin Wu,Ru Xia,Jiasheng Qian,Ming Cao
In this study, Fe/ABTS/PVP nanocomplexes (named FAPs) as photothermal-reinforced catalytic antibacterial agents were prepared using the coordination-induced assembly of Fe (III), 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS), and polyvinylpyrrolidone (PVP). The redox pairs of Fe(II)/Fe(III) in FAPs can catalyze the H 2 O 2 to hydroxyl radicals (•OH) through Fenton reactions, thereby killing effect on bacteria. The photothermal effect of ABTS •+ in FAPs stimulated by near infrared (NIR) irradiation can further improve the catalytic effect, thereby generating more •OH and achieving better antibacterial activity. What's more, the reduction reaction between glutathione (GSH) and ABTS •+ results in the depletion of the GSH level, the redox pair of Fe(II)/Fe(III) is also beneficial in the consumption of GSH. This dual depletion of GSH further expands the intracellular oxidative stress. Thus, the integrated function of photothermal effect, catalytic property, and dual depletion of GSH by FAPs provides a new strategy for fighting against bacterial infections.
研究领域:
纳米技术
·
材料科学
·
生物医学工程
·
抗菌研究
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产品关联
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2023
·Vol. 170
·期 9
·092505
·
IF 3.9
Shuna Liu,Ben Yang,Anran Zuo,Yongming Tang
Ti/SnO2-Sb/PbO2 anodes were electrodeposited from methanesulfonate-based baths, and the effect of dopants such as PVP and Fe on the surface morphology, phase composition, electrocatalytic activity and stability was investigated. It is revealed that the inclusion of Fe effectively enhances the stability of PbO2 anode, while PVP can significantly improve its electrocatalytic activity. The Fe,PVP-codoped anode, Ti/SnO2-Sb/Fe-PVP-PbO2, exhibits the higher stability and electrocatalytic activity compared to the respective inclusion of Fe and PVP. The gradation efficiency of methyl orange (MO) on the Ti/SnO2-Sb/Fe-PVP-PbO2 anode is affected by the applied current density and the initial MO concentration. During degradation, the azo structure of MO is firstly cleaved, resulting in the rapid decolorization of solution. Demethylated MO and the anion of sulfanilic acid are detected as intermediates, and thus a plausible pathway of MO degradation is proposed.
研究领域:
环境科学
·
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
ACS Applied Polymer Materials
·
2024
·
IF 4.4
Zhao-Lei Huo,Jia-Yu Qiao,Le-Xi Zhang,Yao-Wen Yue,Qi-Da Qiu,Zhi-Jiang Hou,Jing Yin,Li-Jian Bie
Nowadays, attractive progress has been made on flexible humidity sensors for multifunctional applications, yet most of them still suffer from intrinsic instability due to the device structure based on flexible substrates. Herein, high-performance flexible humidity sensors were constructed using alkali metal halide doped polyvinylpyrrolidone (PVP)/polyvinylidene fluoride (PVDF) freestanding films. These films are prepared via a versatile thermally induced phase separation procedure with a network-like porous structure. After doping with metal salts of MCl (M = Li, Na, K), the humidity sensing performance is highly improved, among which the LiCl@PVP/PVDF film is the optimized one. In the relative humidity range of 11–97% at room temperature, the LiCl@PVP/PVDF sensor exhibits high response (2.3 × 103), fast response (10 s), small hysteresis (0.41%), and excellent repeatability. Notably, the LiCl@PVP/PVDF film is featured as fully self-supporting without the assistance of any substrate, readily tailorable that can be cut into different shapes, as well as highly flexible that can be bent to certain angles, and meanwhile almost maintains its response without significant decrease. Furthermore, the excellent performance enables the LiCl@PVP/PVDF sensor to demonstrate great potential in real-time noncontact diaper and finger detection. This contribution provides a practical humidity sensing candidate for moisture monitoring and gives insights into the fields of humidity sensors and flexible electronics.
研究领域:
材料科学
·
传感器技术
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
POLYMER BULLETIN
·
2021
·Vol. 79
·期 4
·2173-2188
·
IF 2.87
Hou Jiazi,Zhou Guibin,Hu Jinlun,Wang Yihuan,Gao Shuang
Microparticles had attracted a lot of attention for biomedical applications because of their injectable and biomimetic properties. We reported a method for preparing Polylactic acid (PLA)/Polyvinylpyrrolidone (PVP) core–shell microparticles by single capillary electrospraying and explored their potential applications for drug-loading. The shape of microparticles can be controlled by varying ratios of PLA and PVP during the electrospraying process. Different morphologies were achieved including spindle-like, erythrocyte-like and disk-like microparticles. Furthermore, the method of preparing core–shell microparticles was simple and repeatable. Compared with spherical microparticles, erythrocyte-like microparticles can flow through capillaries by morphing into a parachute-like shape. When the particle morphology converted to disk-like, the increase of water contact angle attributed to the PVP rapid dissolution and the residual PLA interconnection to form a continuous hydrophobic membrane. Besides, the microparticle membrane was extremely low-toxic to cells by MTT assay. Taken together, we prepared injected core–shell microparticles by single capillary electrospraying, which had potential application in drug-loading.
研究领域:
生物医学工程
·
材料科学
·
药剂学
✓ 已验证
DOI
高影响因子
Energy Storage Materials
·
2022
·
IF 20.831
Shiqi Ding,Xin Dai,Zhenjiang Li,Chunsheng Wang,Alan Meng,Lei Wang,Guicun Li,Jianfeng Huang,Shaoxiang Li
Magnesium ions batteries (MIBs) provide great potential for the safety and large-scale energy storage, however, its inherent drawbacks, such as the sluggish kinetics, poor cycling life and lower specific capacities of cathode limit their practical application. Herein, PVP is innovatively incorporated with VS 4 and induced synergistic engineering, including the enlarged interchain spacing, V 3+ self-doping, rich sulfur vacancies and the selectively exposing active surface of (020) facets, which results in the fast kinetics of co-intercalation of Mg 2+ and MgCl + , electrolyte infiltration, more active sites exposure, and the strain/stress relaxation during insertion/extraction process for the high stability of structure. Therefore, this novel design of PVP-VS 4 exhibits long-term cycling stability (80% capacity retention at 5000 mA g −1 after 1500 cycles) and exceptional high-rate capability (140 mAh g −1 at 50 mA g −1 with 45 mAh g −1 at 5000 mA g −1 ). The fast reaction kinetics is further confirmed by galvanostatic intermittent titration technique (GITT) and density functional theory (DFT) computations. In addition, the energy storage mechanism and desirable pseudocapacitive behaviors are elucidated through series of ex situ investigations and pesudocapaticance-like contribution analysis. And PVP-VS 4 delivers the higher anti-self-discharge capability cause by PVP incorporation. PVP-induced synergistic engineering opens up a new opportunity for designing a variety of effective intercalation host materials for next-generation energy storage.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）