International Journal of Electrochemical Science
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2023
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IF 1.5
Bobo Hu,Nana Zhang,Huihui Li,Chong Sun
Sensitive and reliable quantification of histamine (His) is essential to ensure food safety. In this study, a sensing material consisting of reduced graphene oxide/polypyrrole (rGO-PPy) composites is successfully prepared by a two-step synthesis method and verified by transmission electron microscopy (TEM), Fourier transform infrared (FTIR) spectroscopy, ultraviolet-visible (UV-vis) spectroscopy, X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). Based on rGO-PPy, an electrochemical method is established, and the electrochemical behaviours are studied by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and differential pulse voltammetry (DPV). The experimental parameters, such as the detection method, the concentration and volume of rGO-PPy modified on GCE, and the pH value of the buffer solution, are optimized. Under the optimized conditions, the linear equation of the electrochemical sensor to His is I (μA) = 0.01047c + 0.1842 (R 2 = 0.9970) with a linear range of 10~800 μM, and the detection limit is 3.01 μM. Practical samples are also detected, which proves that the sensor has great application prospects. Therefore, this idea and method will make an excellent contribution to food safety.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Lijuan Yan,Yingjiao Ma,Xiaoyin Cao,Yanju Jing,Min Su,Jiyan Li,Zhaoqi Zhu,Weidong Liang,Hanxue Sun,An Li
Solar interfacial evaporation (SIE) is one of the most prospective solar energy harvesting technologies for solving the scarcity of freshwater resources. Herein, we report a novel photothermal membrane polycarbonate (PC)@polypyrrole (PPy) (PC@PPy) adopting to breath figure method followed by surface chemistry modification, and assemble a double-layer solar interfacial evaporator consisting of PC@PPy photothermal membrane as the upper layer and plant fiber-wrapped expanded polyethylene (EPE) foam as the bottom layer for SIE. Due to the abundant porous structure and strong light absorption of the PC@PPy membrane, excellent insulation of the EPE sponge, the as-prepared PC@PPy-EPE evaporator exhibits a high evaporation of 1.78 kg m -2 h −1 and photothermal conversion efficiency of 93.57%, and outstanding evaporation stability and resistance in 16% wt NaCl with an evaporation of 1.58 kg m -2 h −1 under 1 sun irradiation. Moreover, the PC@PPy photothermal possess superior flexibility and strong mechanical properties. Coupling with cost-effective, environment-friendly, simple and easily scale-up breath figure preparation method, the PC@PPy-EPE generator has broad application prospects in SIE.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
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IF 9.9
Yi Wang,Jie Wang,Dong Wei,Lan Xu
In this study, a multicore-shell ternary composite electrode material (MnO 2 @Ppy@NPCNFs) with excellent electrochemical performances was prepared by using surface modification, in which core–shell Ppy@N-doped porous carbon nanofibers (Ppy@NPCNFs) with large specific surface area and high conductivity were used as the substrate (a multicore layer), and MnO 2 was loaded on the substrate by hydrothermal synthesis to form a shell layer, further improving the SC of electrode material. The parameters of hydrothermal growth of MnO 2 on Ppy@NPCNFs were explored by means of the control variable method and response surface methodology, and the optimal parameters were predicted and verified. Electrochemical test results showed that the SC of MnO 2 @Ppy@NPCNFs prepared under the optimal reaction parameters was as high as 595.77 F g −1 , and its capacitance retention was 96.2 % after 1000 cycles. Moreover, a symmetric supercapacitor prepared with the optimal multicore-shell electrode showed an energy density of 9.36 Wh kg −1 at a power density of 1000 W kg −1 and a retention rate of 92.46 % after 1000 cycles, indicating the promising application of multicore-shell ternary composite electrode material in high-performance supercapacitors.
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高影响因子
Journal of Nanomaterials
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2018
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IF 2.207
Shuo Yang,Xuan Li,Pei Yao
A new type of nanopolypyrrole/organically modified montmorillonite-ionic liquid gel polymer electrolyte (ppy/OMMT-ILGPE) is prepared based on nanopolypyrrole/organically modified montmorillonite (ppy/OMMT), N-butyl-N- methylpyrrolidinium bis(trifluoromethanesulfonyl)imide (PP14TFSI), lithium-bis(trifluoromethanesulfonyl) (LiTFSI), polyvinylidene difluoride (PVDF), methyl methacrylate (MMA), and benzoyl peroxide (BPO) by an in situ method. The effect of nano-ppy/OMMT on the physical and electrochemical properties of an ionic liquid gel polymer electrolyte is demonstrated. The results show that nano-ppy/OMMT-ILGPE has a porous structure with a large surface area, and the diameter of the pores on the surface is approximately 1-2 μm. The Li+ transference number of 0.72 is achieved, and the ionic conductivity reaches up to 1.2 × 10−3 S/cm at room temperature. Nano-ppy/OMMT-ILGPE has good thermal stability and mechanical properties. Meanwhile, nano-ppy/OMMT-ILGPE has fine cycle performance in the Linano-ppy/OMMT-ILGPELiNi1/3Co1/3Mn1/3O2 coin cell. The good electrochemistry performance of nano-ppy/OMMT-ILGPE means that it can act as an ideal gel polymer electrolyte material for lithium ion batteries.
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2018
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IF 3.235
Jing Zheng,Min Zhang,Yang Ling,Jingli Xu,Shunzhong Hu,Tasawar Hayat,Njud S. Alharbi,Fan Yang
In this paper, multifunctional nanotubes were prepared by directly combing iron oxide (Fe 3 O 4 ) nanoparticle(NPs) decorated carbon nanotubes (CNTs), and palladium (Pd) NPs together with polypyrrole (PPy) in a facile way. Firstly, magnetic CNT composite (CNTs/Fe 3 O 4 ) was synthesized by the high temperature decomposition process, then PPy could be easily immobilized on the magnetic CNTs. Furthermore, Pd NPs were accumulated on the surface of CNTs/Fe 3 O 4 @PPy to obtain one dimensional CNTs/Fe 3 O 4 @PPy/Pd composite. The composite extraordinary amplified the electrochemical response, providing a highly sensitive electrochemical platform for triclosan detection. This electrochemical sensors had the advantage of fast response, cheap instrument, low cost, simple operation, high sensitivity and real-time detection in situ condition. Moreover, the sensor exhibited a wide linear response range for triclosan (2.247 × 10 −9 M to 2.752 × 10 −7 M) with a detection limit of 1.417 × 10 −9 M, respectively. In addition, the electrochemical sensor reported herein was applied for the detection of triclosan in real samples, revealing promising applications in developing the sensor for environmental inspection and monitoring.
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高影响因子
Materials Today Sustainability
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2022
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IF 7.244
Haipeng Sun,Zhen Liu,Xingqiang Liu,Changlin Yu,Longfu Wei
In this paper, adjusting the content of conducting polymer polypyrrole (Ppy), a series of Ppy/Bi 2 MoO 6 microsphere photocatalysts were prepared. The prepared samples were characterized by some advanced physicochemical methods. These results showed that the introduction of Ppy was beneficial to the increase of crystallinity and specific surface area of Bi 2 MoO 6 . In electrochemical tests, the Ppy/Bi 2 MoO 6 microspheres photocatalyst showed the enhanced migration rate of photogenerated carriers and the improved utilization efficiency of photogenerated carriers in comparison with the pure Bi 2 MoO 6 . The Ppy/Bi 2 MoO 6 microspheres photocatalyst exhibited an excellent photocatalytic performance in the degradation of high concentration of Rhodamine B (RhB), and also could efficiently remove the mixed dyes (RhB and methyl orange). Furthermore, the capture experiments reveal that both holes (h + ) and superoxide radicals (·O 2 − ) played an important role in the removal of dyes.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2021
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IF 4.539
Jinming Ma,Huizhen Deng,Zhe Zhang,Lexin Zhang,Zhihui Qin,Yaru Zhang,Lili Gao,Tifeng Jiao
In this study, a series of Ag 3 PO 4 /PPy/PANI ternary composite catalysts were fabricated by adjusting the mixed solution of pyrrole and aniline with different volume ratios of 4:1, 3:2, 1:1, 2:3, and 1:4, and combining with the in-situ synthesis method. The synthesized Ag 3 PO 4 /PPy/PANI nanoparticles were examined by XRD , SEM, TEM and EDX , Raman spectroscopy . When the ratio of pyrrole and aniline is 1:1, the polymerized PPy/PANI acted as the supporting matrix to effectively immobilize and prevent the aggregation of Ag 3 PO 4 nanoparticles. The catalytic performances of the Ag 3 PO 4 /PPy/PANI composites were confirmed for reduction of 2-nitroaniline (2-NA) and 4-nitrophenol (4-NP) in the presence of NaBH 4 at room temperature by UV–vis spectroscopy. Results showed that the catalytic reduction effect of the Ag 3 PO 4 /PPy/PANI (1:1) on 2-NA is obviously better than that on 4-NP, which followed the pseudo-first-order kinetic, and the corresponding rate constants are 0.0053 min −1 and 0.022 min −1 , respectively, indicating that it has potential application in wastewater treatment in industries.
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COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
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2020
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IF 6.444
Lixue Gai,Yumeng Zhao,Guilin Song,Qingda An,Zuoyi Xiao,Shangru Zhai,Zhongcheng Li
Herein, a novel core-shell PPy@MoS 2 nanotube-like heterostructures were prepared with hollow polypyrrole nanotubes and intertwined MoS 2 nanosheets as core and the outer shell, respectively, by combining chemical oxidative polymerization and hydrothermal process. The unique heterostructures endowed the designed composite with highly enhanced electromagnetic wave absorbing performance. In contrast to pristine hollow PPy nanotubes and MoS 2 nanoflowers, the fabricated PPy@MoS 2 composite not only possessed excellent reflection loss (RL) performance, but also displayed a broad absorbing bandwidth, which might be ascribed to the good impedance matching and multifarious loss pathways including dipole polarization, interfacial polarizations and conductive loss. Impressively, the widest bandwidth (RL < −10 dB) of PPy@MoS 2 could be gained up to 6.4 GHz at 2.5 mm, and the optimal RL is −49.1 dB at 6.1 GHz. In combination of controllable preparation process and highly enhanced performance, this newly PPy@MoS 2 might be a promising candidate in remediation of electromagnetic wave pollution.
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ANALYTICA CHIMICA ACTA
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2017
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IF 4.95
Tingting Xu,Bo Chi,Jian Gao,Meilin Chu,Wenlu Fan,Meihui Yi,Hong Xu,Chun Mao
A simple and accurate immune sensor for quantitative detection of α-Fetoprotein (AFP) was developed based on the immobilization of antigen on the surface of Hep-PGA-PPy nanoparticles modified glassy carbon electrodes (GCE). The obtained Hep-PGA-PPy nanoparticles were characterized by fourier transform infrared (FT-IR) spectra and transmission electron microscopy (TEM). And the blood compatibility of Hep-PGA-PPy nanoparticles was investigated by in vitro coagulation tests, hemolysis assay and whole blood adhesion tests . Combining the conductive property of polypyrrole (PPy) and the biocompatibility of heparin (Hep), the Hep-PGA-PPy nanoparticles could improve not only the anti-biofouling effect the electrode, but also improved the electrochemical properties of the immune sensor. Under optimal conditions, the proposed immune sensor could detect AFP in a linear range from 0.1 to 100 ng mL −1 with a detection limit of 0.099 ng mL −1 at the signal-to-noise ratio of 3, and it also possessed good reproducibility and storage stability. Furthermore, the detection of AFP in five human blood samples also showed satisfactory accuracy with low relative errors. Thus, the developed immune sensor which showed acceptable reproducibility, selectivity , stability and accuracy could be potentially used for the detection of whole blood samples directly.
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高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
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2017
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IF 4.075
Qiongzhen Liu,Bo Wang,Jiahui Chen,Fei Li,Ke Liu,Yuedan Wang,Mufang Li,Zhentan Lu,Wenwen Wang,Dong Wang
In present work, polypyrrole (PPy) has been in-situ polymerized on a poly(vinyl alcohol- co -ethylene) (PVA- co -PE) nanofirous textile to form a 3D interconnecting PPy nanowires/nanofibrous textile composite electrode (designated as NW-PPy/NFs/PET). It demonstrates that the introduction of anthraquinone-2-sulfonic acid sodium (AQS) can tune the morphology of PPy from nanospheres to nanowires. The resulting PPy@PVA- co -PE conformal nanofibers act as bridges among intertwined PPy@PET fibers and PPy nanowires, leading to continuous pathways for ion/electron transfer and larger surface area for faradic reaction. Benefiting from this unique structure, the two-electrode supercapacitor using NaCl solution as electrolyte delivers a high power density of 800 W kg −1 at an energy density of 20 W h kg −1 per mass of active materials. Furthermore, the symmetric all-solid-state NW-PPy/NFs/PET supercapacitor demonstrates high flexibility and cycle stability. Therefore, this work may open a new way to develop light weight and cost-effective electrodes for flexible energy storage devices.
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APPLIED SURFACE SCIENCE
·
2016
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IF 3.15
Zhi Zhu,Xu Tang,Changchang Ma,Minshan Song,Nailing Gao,Youshan Wang,Pengwei Huo,Ziyang Lu,Yongsheng Yan
The ternary conductive Ppy@Ag/g-C 3 N 4 composite photocatalysts was successfully synthesized by polymerization process and surface polymerization technique. And the as-prepared Ppy@Ag/g-C 3 N 4 sample exhibited the higher photocatalytic activity for various pollutant (MO, DM, TC, CIP, GFLX and EH) remove than that of pure g-C 3 N 4 and Ag/g-C 3 N 4 under visible light irradiation. It mainly originated from the Ag nanoparticles anchored between g-C 3 N 4 and Ppy acted as electron transfer mediator that facilitated the charge carrier separation and then expending the lifetime of the carriers. Meanwhile, the obtained Ppy@Ag/g-C 3 N 4 sample also showed a relatively good recycling stability which was the crucial factor for photocatalyst practical application. This work provided a new facile strategy for improving photo-degradation activity of g-C 3 N 4 photocatalyst.
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高影响因子
NANO
·
2025
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IF 1.1
Zhi Lei,Kunlan Diao,Kuntian Li,Daohai Zhang,Shuhao Qin
The hydrophilic and antifouling polymeric membranes attract more and more attention. Herein, functionalized MWCNTs/SP composite films were facilely fabricated by blending sodium styrene maleic anhydride (SMANa), polyethersulfone (PES), polyvinyl pyrrolidone (PVP K30), and functionalized MWCNTs. In addition, a gas-phase polymerization method was employed to deposit a PPy layer on the SP composite film, yielding conductive functionalized MWCNTs/PSP composite films, to prepared the conductive the functional-MWCNTs/PSP composite films with anti-pollution ability, high permeability and high selectivity. Among them, the addition of functional-MWCNTs increased the permeation flux and anti-pollution ability of the films. The MWCNT-NH/PSP composite film demonstrated remarkable performance with pure water flux of 453.9 L/(m 2· h) and methylene blue retention rate of 79.05%. Finally, MWCNTs-NH was co-blended with GO to construct an excellent conductive network, so that MWCNT-NH, GO and PPy had a synergistic effect to enhance the conductivity of the films, thereby improving the membrane’s retention performance of dyes and ions through enhanced electrostatic effect. Furthermore, the optimized MWCNT-NH/GO/PSP-2 composite film achieved maximum Congo red permeability of 252.44 L/(m 2· h) while maintaining high salt retention rates of 47.2% for NaCl and 61.0% for MgSO 4 .
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