EUROPEAN POLYMER JOURNAL
·
2024
·
IF 5.8
Ziwei Lv,Hongxu Liu,Jingxuan Zhao,Ruijia Wang,Ting Xie,Yuchao Qi,Yang Yu,Xue Lv,Shulin Sun
In this paper, PVDF-g-PNIPAAm/GEP-PDA@ZnO composite membranes that can undergo light-induced structural response and photodegradation to achieve self-cleaning have been designed and applied to the separation and purification of dye wastewater. The membranes were prepared by blending graphene (GPE)-polydopamine (PDA)-coated zinc oxide (ZnO) core–shell particles into the PVDF-g-PNIPAAm matrix with a non-solvent induced phase separation technique. The GPE and ZnO are tightly bonded by highly adhesive PDA to form a “strawberry-like” core–shell structure. GPE absorbs light energy and converts it into heat, resulting in changes in PNIPAAm chain segments to expand the pore size for self-cleaning. While the membrane is warming up, GPE further promotes the activation of active groups on the surface of PDA@ZnO at high temperature, resulting in unique and excellent photothermal catalytic activity. As a result, the membrane achieves both self-cleaning and pollutant degradation, which results in an FRR of 99.6% after light cleaning. Moreover, the GPE-PDA@ZnO nanoparticle-modified PVDF-g-PNIPAAm membranes exhibit excellent cycling stability with a degradation flux recovery rate of more than 97% even after multiple UV cleaning. Thus, PVDF-g-PNIPAAm/GPE-PDA@ZnO composite membranes extend the versatility of PVDF-based membranes and show extraordinary potential for application in wastewater treatment.
研究领域:
材料科学
·
环境工程
·
光催化技术
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2024
·
IF 6.5
Qian Chen,Xixun Shen,Zuogui Zhang,Qunjie Xu
To solve the problem of icing on the wind turbine blades, here an anti-icing coating composed of PDMS and PVDF as organic bonding frameworks, GPE, MWCNTs , and modified SiO 2 nanoparticles as functional doping phases is synthesized through a one-step spraying method. The coating exhibits excellent superhydrophobic properties with a large contact angle of about 167.0° and a low sliding angle of4.0° and excellent photothermal and electrothermal properties. Under light and electric heating conditions, the coating can be rapidly heated to a high temperature level of about 68.4 °C at 81 s and 48.5 °C at <61 s, respectively. The static water droplet icing experiment shows that the coating can effectively delay the freezing time and reduce the adhesion strength of ice. The freezing rain experiment further showed that under the coordination of photothermal and electrothermal, freezing rain droplets will not freeze on the coating, indicating an excellent anti-icing ability. Meanwhile, the coating also exhibits a superior de-icing ability under the coordination of photothermal and electrothermal. In addition, various performance experiments, including acid and alkali immersion, friction and wear, and impact experiment are also performed to demonstrate the excellent stability and durability of the coating.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Fengyang Wang,Yan Qi,Lei Ji,Fanglin Qiao,Yin Chen,Xiaohui Xiong,Yuanjian Liu
A GPE-PET (graphene-polyethylene terephthalate) bipolar electrode-electrochemiluminescence (BPE-ECL) platform was developed for ochratoxin A (OTA) detection. PET served as the electrode sheet substrate, and GPE was drop-coated onto the surface of PET to form a conductive line. On the functional sensing interface, the thiol (-SH) modified OTA aptamer (OTA-Aptamer) are fixed on the surface of the gold-plated cathode through Au S bonds. The efficient electron transfer ability of methylene blue (MB) made the anode ECL signal strong. Due to competition between OTA and MB with OTA-Aptamer, leading to a decrease in ECL intensity of the [Ru(bpy) 3 ] 2+ /TPA system on the BPE anode. Under optimized conditions, the GPE-PET BPE-ECL biosensor displayed superior sensitivity for OTA with a detection limit of 2 ng mL −1 and a wide linear concentration range of 5–100 ng mL −1 . This method could be further applied to detect various toxins and had broad application prospects.
研究领域:
分析化学
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食品安全
·
生物传感
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Analytical Chemistry Letters
·
2026
·
IF 1.6
Hongbo Zhao,Zixuan Wang,Xiaoyan Duan,Lingchun Wei,Ganghui Chu
Estradiol (E2) is a steroid hormone that has garnered widespread global attention as an emerging pollutant due to its potential to cause endocrine disruption in organisms upon concentration changes. This experiment achieves highly efficient detection of estradiol based on screen-printed electrodes (SPEs) and a graphene (GPE)/MIL-100(Fe) composite material. The GPE/MIL- 100(Fe) composite, characterized by a rich porous structure, was synthesized via a hydrothermal method, and the modified electrode was prepared using the drop-coating technique. The GPE/MIL-100(Fe) composite was characterized by SEM, XRD, FTIR, and XPS to confirm its structure, composition, and properties. Cyclic voltammetry (CV), differential pulse voltammetry (DPV), and chronoamperometry (CA) were employed to enable continuous monitoring of estradiol in liquid environments. The modified electrode demonstrated significant electrocatalytic activity, exhibiting high sensitivity within a linear range of 2.0 nmol/ mL to 140 nmol/mL, with a practical detection limit (LOD) of 0.002 μmol/mL. The innovation of this study lies in leveraging the synergistic effect of GPE/MIL-100(Fe) to enhance the detection performance for estradiol. In the detection of actual samples such as urine (spiked recovery rate: 103.3% -110.9%) and pond water (spiked recovery rate: 96.7% -110.0%), clear characteristic peaks and good sensitivity for estradiol were observed.
✓ 已验证
DOI
高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
·
2019
·Vol. 45
·期 10
·4959-4973
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IF 2.064
Fu Lixin,Shi Liyi,Wang Zhuyi,Zhu Jiefang,Zhao Yin,Yuan Shuai
Abstract In this paper, a simple and feasible method for preparing gel polymer electrolyte (GPE) with good ionic transport properties and mechanical stability is proposed. A ZrO 2 /KH570/PU/P123 layer was formed on the outer and inner pore surfaces of PE separator before in situ polymerization by a simple one-step dipping coating process. This coating layer changes the PE separator surface from hydrophobic to hydrophilic, and therefore facilitates the uniform spreading of the GPE precursor solution on the PE surface to enable the formation of highly uniform GPE. Moreover, it effectively compensates the negative effects of in situ gelatinization on the ionic transport behavior of the final PE-supported GPE. This GPE possesses excellent ion transport properties and mechanical stability, as well as improves the static and dynamic interfacial stability with lithium metal anode. When using metallic lithium and LiCoO 2 to assemble cells, this PE-supported GPE affords improved C-rate capability, cycling performance and effective dendrite inhibition. Graphic abstract
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2018
·
IF 5.116
Chaoqun Niu,Mingke Zhang,Guangping Chen,Bokai Cao,Jiwei Shi,Jie Du,Yong Chen
Polyacrylate polymer is a promising polymer matrix for gel polymer electrolyte (GPE) in lithium-ion batteries . Herein, in-situ polymerized poly(ethylene glycol phenyl etheracrylate) (PEGPEA) based GPE combined with 1 M LiPF6 in ethylene carbonate/dimethyl carbonate/ethyl methyl carbonate (EC/DMC/EMC, 1:1:1 in volume) solvents was introduced. The maximum recoverable strain of the in-situ polymerized PEGPEA-GPE was up to 99%. The outstanding interfacial compatibility between PEGPEA-GPE and the lithium electrode was also obtained. Surprisingly, lithium dendrite was effectively suppressed in charge-discharge cycling because of polymer-enhanced solid electrolyte interphase (SEI) and excellent contact interface. Furthermore, the PEGPEA-GPE exhibited wide electrochemical stability window up to 4.9 V versus Li + /Li, and achieved an ionic conductivity of 3.35 × 10 −3 S cm −1 at 25 °C. When used as electrolyte, the Li[Ni 0.5 Co 0.2 Mn 0.3 ]O 2 /PEGPEA-GPE/Li batteries showed high discharge capacity retention rate of 97.5% after 70 charge-discharge cycles and considerable discharge rate capability, i.e., 155 mAh g −1 0.2C, 142 mAh g −1 0.5C, 120 mAh g −1 1C, 60 mAh g −1 2C. These results demonstrate that this highly elastic in-situ polymerized PEGPEA-GPE is a potential electrolyte system for high-performance polymer electrolyte lithium-ion batteries and has excellent application prospects in wearable and flexible batteries.
研究领域:
材料科学
·
电化学
·
电池技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）