SURFACE & COATINGS TECHNOLOGY
·
2018
·
IF 2.906
Qilong Zhang,Yongchang Jiang,Enjie Yu,Hui Yang
Core-shell structured BaTiO 3 @polyaniline (BT@PANI) nanoparticles were synthesized via surface hydroxylation and in-situ polymerization method and were embedded into Poly(vinylidene fluoride- co -hexafluoropropylene) [P(VDF-HFP)] matrix. The dielectric performance as well as thermal behavior of BT@PANI/P(VDF-HFP) nanocomposite films are investigated. The crystallinity increases with increasing the BT@PANI content. Compared with BT particles, the BT@PANI core-shell nanoparticles exhibit notable improvement on dielectric properties . Typically, with a filler content of 20 vol% BT@PANI, the dielectric constant of BT@PANI/P(VDF-HFP) composite film reaches 99.1 at 1 kHz, which is 6.2 times larger than that of 20 vol% BT (16.1) and 9.6 times larger than pristine P(VDF-HFP) (10.3). Enhanced permittivity is generated from the interfacial polarization and the microcapacitor effect provided by the core-shell nanoparticles. Moreover, nanocomposite film maintains a low dielectric loss of 0.21 at 1 kHz. This research offers a solution for fabricating dielectric composite with large dielectric constant and low dielectric loss, which could be beneficial for the improvement of advanced electronic devices.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2023
·
IF 5.2
Zhixiang Cui,Shengnan Tian,Xiaolong Liu,Qianting Wang,Sen Zeng,Junhui Si
The efficient elimination of toxic dye and Cr(VI) from wastewater by photocatalysis is still a challenge due to the unsatisfactory photocatalytic efficiency and difficult separation of the photocatalyst . Herein, the thermoplastic polyurethane (TPU) fiber membrane was prepared by electrospinning and then titanium dioxide (TiO 2 ) nanoparticles were loaded on the fiber membrane by ultrasonic-assisted method, followed by in-situ polymerizations of polyaniline (PANI) on the surface of the membrane. The synergistic effect of TiO 2 and PANI results in faster charge migration and more efficient separation of photogenerated charge carriers. Photocatalytic experiments revealed that TPU/TiO 2 /PANI fiber membranes were highly efficient for dye degradation and Cr(VI) reduction under visible light irradiation. 99.7 % of Congo red was degraded by TPU/TiO 2 /PANI membrane within 30 min, and the reaction rate reached 0.2 min −1 . The Cr(VI) reduction efficiency was up to 99.0 % within 25 min with a reaction rate of 0.128 min −1 . Additionally, the TPU/TiO 2 /PANI membrane exhibited a low loss in catalytic activity even after recycling 10 times, suggesting superior recycling stability compared to TPU/TiO 2 membrane. The result of the electron spin resonance (ESR) experiment showed that superoxide radicals (-O 2 - ) and hydroxyl radicals (-OH - ) were involved in the photocatalytic degradation process. The prepared TPU/TiO 2 /PANI fiber membrane combined with excellent photocatalytic capacity, good stability and easy recovery makes it a good candidate for removing dye and Cr(VI) from wastewater.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2022
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IF 6.371
Wen Long Liu,Yong Qiang Guo,Tao Lin,Hong Chao Peng,Ya Ping Yu,Fan Yang,Sheng Chen
MXene-based electrodes have shown great performance as flexible supercapacitors in the application of portable and wearable electronics. Nevertheless, 2D MXene nanosheets suffer from severe self-stacking issues during electrode preparation, which can significantly limit the charge storage capacity. Herein, a simple yet efficient strategy is developed for fabricating the supercapacitor electrode based on the MXene@PANI coated activated carbon cloth (MXene@PANI-ACC). The resulting MXene@PANI-ACC possesses 2D/0D/1D hierarchical nanostructures , where the 1D carbon fibers are uniformly coated with MXene@PANI nanocomposites and the 0D PANI nanoparticles are densely anchored on the surfaces of the 2D MXene nanosheets. This hierarchical structure can effectively tackle the restacking issue of MXene nanosheets during electrode fabrication and provide the obtained electrode with good conductivity for fast electron transfer . Benefiting from those features, this MXene@PANI-ACC electrode demonstrates an excellent area capacitance of 1347 mF/cm 2 at a current density of 1 mA/cm 2 and can retain of its original capacity at 20 mA/cm 2 after 5000 cycles. The excellent electrochemical performance highlights great promise of the developed electrode with hierarchical nanostructures for applications in high-performance energy storage devices.
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Materials
·
2021
·Vol. 14
·期 10
·2629
·
IF 3.623
Shimin Chen,Bo Li,Rengui Xiao,Huanhu Luo,Siwu Yu,Jinghang He,Xia Liao
In this work, a ternary TiO2/Graphene oxide/Polyaniline (TiO2/GO/PANI) nanocomposite was synthesized by in situ oxidation and use as a filler on epoxy resin (TiO2/GO/PANI/EP), a bifunctional in situ protective coating has been developed and reinforced the Q235 carbon steel protection against corrosion. The structure and optical properties of the obtained composites are characterized by XRD, FTIR, and UV–vis. Compared to bare TiO2and bare Q235, the TiO2/GO/PANI/EP coating exhibited prominent photoelectrochemical properties, such as the photocurrent density increased 0.06 A/cm2and the corrosion potential shifted from −651 mV to −851 mV, respectively. The results show that the TiO2/GO/PANI nanocomposite has an extended light absorption range and the effective separation of electron-hole pairs improves the photoelectrochemical performance, and also provides cathodic protection to Q235 steel under dark conditions. The TiO2/GO/PANI/EP coating can isolate the Q235 steel from the external corrosive environment, and may generally be regarded a useful protective barrier coating to metallic materials. When the TiO2/GO/PANI composite is dispersed in the EP, the compactness of the coating is improved and the protective barrier effect is enhanced.Keywords:TiO2/GO/PANI nanocomposite;epoxy resin;barrier protection;photocathode protection
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 140
·期 9
·e53565
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IF 3.057
Guoan Li,Wei Deng,Wanyu Li,Meng Yang,Weiwei Cui
Polymer-based dielectric composites with simultaneously improved dielectric constant and breakdown strength have great potential applications in energy storage. In this paper, polyaniline@BaTiO 3 (PANI@BT) nanoparticles with core-shell structure are first fabricated by in-situ chemical oxidative polymerization, and deposited on the surface of two-dimensional nanoplatelets (graphene oxide [GO] and hexagonal boron nitride nanosheets [BNNS]), which are then utilized to prepare poly(vinylidene fluoride) (PVDF)-based composites. The presence of 2D nanoplatelets is found to significantly ameliorate the dispersion of PANI@BT particles in the PVDF matrix, and thus endowing the resultant PVDF composites with improved comprehensive performance. The dielectric constant of PANI@BT-GO/PVDF and PANI@BT-BNNS/PVDF composites with 50 wt% fillers increase to 124.9 and 169.5 at 100 Hz, accompanied with relatively low dielectric loss. When the filler content is 10 wt%, the breakdown strength of PANI@BT-BNNS/PVDF achieves 133.5 kV/mm, which is 9.7% and 71.8% higher than that of the pristine PVDF and PANI@BT/PVDF composites. Meanwhile, the tensile stress also reaches the highest value of 43.38 MPa. In addition, the PANI@BT-GO/PVDF and PANI@BT-BNNS/PVDF composites present higher thermal decomposition temperature in comparison with PANI@BT/PVDF composites.
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RSC Advances
·
2015
·Vol. 5
·期 85
·69067-69074
·
IF 3.84
Ting Wu,Lu Yan Wang,Sen Du,Wen Juan Guo,Mei Shan Pei
Polyaniline (PANI) micro/nanostructures are synthesized by electrochemical polymerization, and characterized by field-emission scanning electron microscopy, Fourier transform infrared spectroscopy and UV-visible spectroscopy. It is revealed that the PANI microwires are produced with high yield with diameters of about 2 μm and lengths of several hundreds of micrometers, while nanostructures in the presence of PAA have diameters of about 500 nm. The micro/nanostructured PANI films are very stable and show high electrocatalytic reduction toward H2O2, which makes it an ideal substrate for H2O2 detection and offers great promise for biosensing applications.
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RSC Advances
·
2017
·Vol. 7
·期 53
·33510-33520
·
IF 3.108
Jinwei Wei,Bo Liang,Qingpeng Cao,Chentian Mo,Youming Zheng,Xuesong Ye
In this paper, vertically aligned PANI nanorod arrays were successfully prepared on GO nanosheets at low temperature via a dilute polymerization method, in which the GO nanosheets with abundant hydrophilic groups were employed to support the heterogeneous growth of uniformly-distributed PANI nanorod arrays. The acquired nanocomposite was characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, and X-ray photoelectron spectroscopy (XPS). NH3 sensing performances of the as-prepared nanocomposite were carefully examined. With the help of the enhanced synergistic effect derived from the large number of p–n heterojunctions in the deliberately-designed microstructure, the device exhibited an enhanced response to NH3 vapor (14.63 at 50 ppm), wide dynamic range (1–6400 ppm), and fast response and recovery processes, in comparison to pure PANI nanofibers. The impact of the drop-coating amount of the sensing nanocomposite on the sensing performances was also investigated to find out the suitable amount for fabricating a high-performance ammonia sensor. Herein, the superior performances of the proposed well-organized microstructure make it an effective nanocomposite for gas sensing applications.
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2024
·Vol. 31
·期 19
·28695-28705
·
IF 0
Liu Hongyu,Ye Wei,Zhang Huan,Wang Huicai,Wei Junfu
Here, polyaniline/polyvinylidene fluoride (PANI/PVDF) nanofiber composite membrane was fabricated using electrostatic spinning technology to remove hexavalent chromium Cr(VI). The employment of PANI not only extremely enhanced the hydrophilic property of the nanofiber membrane, but also facilitated the transfer of Cr 2 O 7 2− from water to the membrane. The PANI/PVDF membrane had an extremely excellent performance in getting rid of Cr(VI) and a quite large flux (250 L/m 2 h). The maximum adsorption quantity of the membrane could reach 334.5 mg/g in which adsorption played 52.12% part and reduction played 47.87% part. The removal rate could reach nearly 100% immediately in the permeate solution under filtration while it needed 240 min to reach 100% only by static adsorption. Therefore, the interception of the membrane and the adsorption reduction of PANI had synergistic effect on removal of Cr(VI). Furthermore, the removal rate of Cr(VI) could still reach 95.97% after reused 8 times. The membrane showed a very good reusability and application prospect. Graphical Abstract
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Rongrong Si,Honggang Luo,Junwen Pu
Wood-conducting polymer materials have been widely used as supercapacitor electrode; however, it remains challenging to achieve a simple method to improve the homogeneity of the conductive material on wood and to reach high mass loading. Herein, a novel “pore-making, active substance-filling, densification (dissolution, in-situ polymerization of polyaniline (PANI), self-shrinking)” strategy is proposed for the preparation of wood electrodes with a high mass loading (41.4 wt%) and homogeneity. Ingeniously, ZnCl 2 as a dissolving agent and pore-making agent to treat delignified wood can generate more pores on the wood, which is more conducive to the penetration of aniline small molecules, besides, the dissolved fine fibers can be entangled with more PANI, which can improve the loading and homogeneity of PANI. After drying treatment, there will be shrinkage again, playing a certain physical densification effect on the large lumen. The optical electrode was RWP2 showing high electrochemical performance (2328.9 mF/cm 2 , 1 mA/cm 2 ), and stability (5000 cycles, 89.3 %). Moving forward, the RWP2//RWP2 SSC showed an excellent energy density of 164.24 μwh/cm 2 at a power density of 250 μw/cm 2 . Remarkably, the simple and versatile strategy of designing wood-based materials with high mass loading provides new research ideas for realizing multifunctional applications.
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Chemosensors
·
2024
·Vol. 12
·期 11
·222
·
IF 3.7
Jinhao Wang,Lijuan Chen,Fan Chen,Xinyang Lu,Xuanye Li,Yu Bao,Wei Wang,Dongxue Han,Li Niu
With the continuous advancement of contemporary medical technology, an increasing number of individuals are inclined towards self-monitoring their physiological health information, specifically focusing on monitoring blood glucose levels. However, as an emerging flexible sensing technique, continuous and non-invasive monitoring of glucose in sweat offers a promising alternative to conventional invasive blood tests for measuring blood glucose levels, reducing the risk of infection associated with blood testing. In this study, we fabricated a flexible and wearable electrochemical enzyme sensor based on a two-dimensional Ti3C2TxMXene nanosheets and coral-like polyaniline (PANI) binary nanocomposite (denoted as Ti3C2Tx/PANI) for continuous, non-invasive, real-time monitoring of sweat glucose. The exceptional conductivity of Ti3C2TxMXene nanosheets, in conjunction with the mutual doping effect facilitated by coral-like PANI, significantly enhances electrical conductivity and specific surface areas of Ti3C2Tx/PANI. Consequently, the fabricated sensor exhibits remarkable sensitivity (25.16 μA·mM−1·cm−2), a low detection limit of glucose (26 μM), and an extensive detection range (0.05 mM ~ 1.0 mM) in sweat. Due to the dense coral-like structure of Ti3C2Tx/PANI binary nanocomposite, a larger effective area is obtained to offer more active sites for enzyme immobilization and enhancing enzymatic catalytic activity. Moreover, the sensor demonstrates exceptional mechanical performance, enabling a 60° bend in practical applications, thus satisfying the rigorous demands of human sweat detection applications. The results obtained from continuous 60 min in vitro monitoring of sweat glucose levels demonstrate a robust correlation with the data of blood glucose levels collected by a commercial glucose meter. Furthermore, the fabricated Ti3C2Tx/PANI/GOx sensor demonstrated agreement with HPLC findings regarding the actual concentration of added glucose. This study presents an efficient and practical approach for the development of a highly reliable MXene glucose biosensor, enabling stable and long-term monitoring of glucose levels in human sweat.
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PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2025
·
IF 7.8
Yujie Zhang,Zexin Cui,Rongfang Yuan,Huilun Chen,Beihai Zhou
As the persistent contamination of water sources with antibiotics poses a growing environmental challenge, effective strategies for the degradation of such pollutants are urgently needed. Herein, a novel organic-inorganic Z-scheme heterojunction material, reduced Graphene Oxide (rGO)@PANI/SnO 2 , was prepared for the photocatalytic degradation of sulfadiazine (SD). When the PANI/SnO 2 with PANI doping amount of 1% was loaded on 1% rGO, the catalyst showed the best photocatalytic activity, with a reaction rate constant of 0.184 h -1 , which was 32.8 and 7.19 times higher than that of PANI and SnO 2 , respectively. The improved photocatalytic activity was mainly due to the high electrical conductivity of rGO and the formation of a Z-scheme heterojunction between PANI and SnO 2 , which effectively facilitated the transfer of photogenerated carriers. Quenching experiments showed that ·OH is the main active species. Besides, Density Functional Theory (DFT) calculations found that the sulfonamide bond and pyrimidine heterocyclic were vulnerable site in the SD. Then, four possible degradation pathways were proposed, primarily involving the breaking of the sulfonamide bond and the ring-opening of the pyrimidine heterocycle. The response surface method (RSM) was used to confirm that the removal of SD was affected by the single factor of initial SD concentration, pH value and catalyst dosage, and the magnitude of the effect of different parameters was in the order of pH > catalyst dosage > SD concentration. It was found that Cl - and SO 4 2- inhibited the photocatalytic process, whereas HCO 3 - facilitated the process through its ability to produce ·OH by hydrolysis and provide a weakly alkaline environment. This work provides novel ideas for the preparation of organic-inorganic heterojunction photocatalysts and enhances the application of organic materials in the photocatalytic degradation of antibiotics in water.
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ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Guochao Wan,Wenhao Sun,Lei Liu,Changming Mao,Zhonghua Zhang,Xiaosong Guo,Guicun Li
Reducing the free radicals associated with electrochemical reactions and the activity of H2O is an effective measure to inhibit side reactions and improve stability for rechargeable aqueous Zn-ion batteries. Herein, methylsulfonylmethane (MSM), a popular dietary supplement for humans, is used as an innoxious and low-cost additive to scavenge free radicals and optimize the coordination condition for aqueous ZnSO4 electrolyte. Profiting from the double effects of MSM, the Zn∥Ti asymmetric cells exhibit excellent stability and display a high Coulombic efficiency (CE) of 99.5% in the aqueous MSM/ZnSO4 electrolyte for 1000 h, and the Zn∥Zn cells achieve a long cycle life of over 2000 h. In addition, MSM can effectively suppress the dissolution of an ammonium vanadate (NVO) cathode. The positive role of MSM is further exhibited in the Zn∥NVO and Zn∥PANI full cells, exhibiting outstanding charge/discharge performance and capacity retention. This work provides a type of innoxious additive for an aqueous electrolyte for aqueous rechargeable zinc-ion batteries.
研究领域:
材料科学
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电化学
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能源存储
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危险品化学品经营许可证（带存储）