APPLIED CATALYSIS B-ENVIRONMENTAL
·
2017
·
IF 9.446
Zhongming Wang,Xiaoying Peng,Chuyun Huang,Xun Chen,Wenxin Dai,Xianzhi Fu
A series of polyaniline–titanium dioxide (PANI/TiO 2 ) nanocomposite film sensor were fabricated by an in-situ chemical oxidation polymerization of aniline at TiO 2 (anatase) surface, and were evaluated the CO gas sensitivity under UV irradiation at room temperature. Although adding PANI into TiO 2 seemed to weaken the photo-assisted conductivity of film sensor sample at N 2 atmosphere, it enhanced the photo-assisted gas sensitivity to CO. Based on the chemical characterization results of PANI/TiO 2 by FT-IR, Raman and XPS, it is proposed that the protonated N site in PANI chains (formed by TiO 2 interacting with PANI) would promote the adsorption of CO, resulting in the more electrons from CO to PANI by the typical π–conjugated structures of benzenoid and quinonoid units and then to TiO 2 by the hydrogen bonds (N⋯H⋯O) in the interface of PANI and TiO 2 . Moreover, the presence of H 2 O could enhance this photo-assisted gas sensitivity. Furthermore, the PANI/TiO 2 powder sample also exhibited a higher activity of photocatalytic oxidizing CO than the pure TiO 2 sample, indicating that the enhancement in the photo-assisted sensing response to CO would benefit the photocatalytic oxidation of CO over PANI/TiO 2 . This study not only provides a possible approach to develop a photo-assisted gas-sensitive material by introducing the structure of organic-inorganic hybrided nanocomposite, but also provides a possible method to estimate the photocatalytic activity of a semiconductor material by testing its photo-assisted sensitivity to the reactant gas.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Changkun Qiu,Hao Zhang,Qingrun Li,Yongxian Guo,Yifan Song,Fei An,Liang Zhu,Anshan Xiao,Chunxiao Lv,Dongzhi Zhang
The interface between two distinct materials in a heterojunction material plays a crucial role in gas sensors, as it facilitates the swift and effective transfer of charge carriers, resulting in enhanced response times. Nevertheless, the impact of heterogeneous interfaces on gas-sensing properties remains uncertain, impeding the advancement of semiconducting hybrids in gas-sensing applications. This study presents the synthesis of a PANI/CoMoO4 p–p heterogeneous nanocomposite through in situ polymerization of highly active PANI onto CoMoO4. In the range of 0.05–50 ppm NH3, PANI/CoMoO4 exhibits a rapid response time of ∼5 s (50 ppm) and a low LOD of 50 ppb. PANI/CoMoO4 has only 10% decrease in response to NH3 during 40 days and demonstrates a high selectivity to NH3 against H2S, CO, CH4, and other interferents. The effective modification of PANI, as confirmed by density functional theory (DFT), enhances the adsorption efficiency of NH3 molecules. Additionally, the p–p heterojunction interface between PANI and CoMoO4 facilitates efficient electron transport. The findings of this study highlight the advantages of p–p heterojunctions in NH3 detection, offering novel insights for the design and synthesis of high-performance gas-sensitive materials. Furthermore, effective utilization of the PANI/CoMoO4 nanocomposite in portable gas sensors and inspection robots underscores their practicality.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
RUSSIAN JOURNAL OF ELECTROCHEMISTRY
·
2021
·Vol. 57
·期 8
·852-857
·
IF 1.078
Ke Qu,Deng Miao,Tang Wei
Abstract Electrochemical energy storage system has been a promising focus to tackle with the current energy crisis problem. Polyaniline (PANI) has been an attractive electrode material in energy storage devices, owning unique and excellent developing prospects in the field of supercapacitors. In order to further improve its capacitive performance, composite materials of PANI blended with various carbon-based materials, metal oxides or metal sulfides are typically prepared. In this study, PANI-based ternary composite of PANI, molybdenum disulfide (MoS 2 ) and graphite powder (Gr) was prepared electrochemically to afford the PANI/MoS 2 /Gr-modified electrode materials. Cyclic voltammetry (CV), galvanostatic charge and discharge (GCD) and electrochemical impedance spectroscopy (EIS) methods were used to characterize and investigate the ternary composite’s supercapacitive performance. A high specific capacitance of 381.9 F/g was achieved under 1 A/g current density. When the applied current densities were increased from 1 to 8 A/g, a high specific capacitance of 322.0 F/g was still maintained, which corresponded to a good capacitance retention rate of 84.3%, showing the ternary composite’s excellent rate performance. The research results illustrated the great potential of the PANI/MoS 2 /Gr ternary composite as a promising supercapacitor energy storage material.
研究领域:
电化学
·
能源存储材料
·
材料科学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Yong-Sheng Fang,Peng He,Yong-Zhu Cai,Wen-Qiang Cao,Mao-Sheng Cao
Ti 3 C 2 T x exhibits excellent electromagnetic (EM) shielding and electrochemical properties . However, the inherent re-stacking tendency and easy oxidation of Ti 3 C 2 T x limit its further application. In this study, a multi-walled carbon nanotube/polyaniline composite (CNT/PANI, denoted as C –P) was introduced into Ti 3 C 2 T x nanosheets to obtain a Ti 3 C 2 T x –CNT/PANI composite (T@CP). Owing to the integrated effects of Ti 3 C 2 T x and C –P, the contribution of absorption was significantly improved, which finally enhanced the EM shielding performance of T@CP. The highest total EM shielding effectiveness ( SE T ) was close to 50 dB (49.8 dB), which was substantially higher than that of pure Ti 3 C 2 T x (45.3 dB). Moreover, T@CP demonstrated outstanding supercapacitive performance. The specific capacitance of T@CP (2134.5 mF/cm 2 at 2 mV/s) was considerably higher than that of pure Ti 3 C 2 T x (414.3 mF/cm 2 at 2 mV/s). These findings provide a new route for the development of high-efficiency Ti 3 C 2 T x -based bifunctional EM shielding and electrochemical materials.
研究领域:
材料科学
·
电磁学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Micromachines
·
2023
·Vol. 14
·期 10
·1856
·
IF 3.4
Qiang Zhang,Xianran Li,Yinyin Zheng,Qian Tu,Shiwen Wei,Hong Shi,Wentao Tang,Liangzhe Chen
As a typical pseudocapacitor material, VOxpossesses mixed valence states, making it an ideal electrode material for symmetric screen-printed supercapacitors. However, its high internal resistance and low energy density are the main hurdles to its widespread application. In this study, a two-dimensional PANI@VOxnanobelt with a core-shell architecture was constructed via a two-step route. This strategy involves the preparation of VOxusing a solvothermal method, and a subsequent in situ polymerization process of the PANI. By virtue of the synergistic effect between the VOxcore and the PANI shell, the optimal VOx@PANI has an enhanced conductivity of 0.7 ± 0.04 S/Ω, which can deliver a high specific capacitance of 347.5 F/g at 0.5 A/g, a decent cycling life of ~72.0%, and an outstanding Coulomb efficiency of ~100% after 5000 cycles at 5 A/g. Moreover, a flexible all-solid-state symmetric supercapacitor (VOx@PANI SSC) with an in-planar interdigitated structure was screen-printed and assembled on a nickel current collector; it yielded a remarkable areal energy density of 115.17 μWh/cm2at an areal power density of 0.39 mW/cm2, and possessed outstanding flexibility and mechanical performance. Notably, a “Xiaomi” hygrothermograph (3.0 V) was powered easily by tandem SSCs with an operating voltage of 3.1 V. Therefore, this advanced pseudocapacitor material with core-shell architecture opens novel ideas for flexible symmetric supercapacitors in powering portable/wearable products.Keywords:VOxnanobelts;PANI;core-shell architecture;flexible;supercapacitor;electronics
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanomaterials
·
2020
·Vol. 10
·期 6
·1034
·
IF 4.324
Qing Liu,Shihang Zhang,Yan Xu
In this study, the dense cloud-like structured CuS nanoparticles were successfully prepared using a simple two-step hydrothermal method. The experimental temperature was the most important factor that affected the microstructure and surface functions of CuS/C. Therefore, the CuS/C electrodes were synthesized at different temperatures (80 °C, 120 °C, and 160 °C). Subsequently, their crystallographic phase and morphologies as well as the structure of the as-prepared electrodes were analyzed in detail. The electrode prepared at 120 °C (CuS/C-120) was determined to have a perfect microstructure, high specific capacitance, and good rate performance. To further improve the electrochemical performance of this electrode, it was combined with polyaniline (PANI) to obtain a CuS/C-120@PANI electrode via the cyclic voltammetric electrodeposition method. The CuS/C-120@PANI electrode exhibits a specific capacitance of 425.53 Fg−1at a current density of 1 Ag−1and a good cycling stability of 89.86% after 3000 cycles. The perfect architecture of CuS/C-120@PANI maximizes the synergistic effect between its different components and provides abundant electrochemically reactive sites, promoting the diffusion and transfer of electrolyte ions during the electrochemical reaction processes. Detailed analysis shows that the CuS/C-120@PANI electrode has great potential for use in high-performance energy storage devices.Keywords:CuS/C-120@PANI;nanocomposites;supercapacitor;electrode material
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2020
·
IF 7.094
Jialin Ma,Hengdong Ren,Zhenying Liu,Jun Zhou,Yueqin Wang,Biao Hu,Yin Liu,Ling Bing Kong,Tianshu Zhang
A microwave absorber of MoS 2 -PANI with three-dimensional spherical structure was synthesized. The absorber was prepared by one-step hydrothermal strategy of a two-dimensional nanoflower-like MoS 2 and in-situ oxidation polymerization reaction with an aniline monomer under ice bath conditions. It can be clearly seen from the SEM characterization that the structure of this three-dimensional MoS 2 -PANI microwave absorber is composed of a soft flower-like MoS 2 as a carrier and a successful intercalation of two-dimensional nano-rod PANI . The effects of aniline monomer, initiator and molybdenum disulfide on the microwave absorption properties of MoS 2 -PANI nanocomposites were investigated by adjusting different mass ratios. The results show that the optimized reflection loss (RL) of the MoS 2 -PANI nanocomposites after interlayer is −59.78 dB, a matching thickness of 3.44 mm and an effective absorption frequency range of 6.56–9.68 GHz (RL < -10 dB), covering C-Band and X-band. The outstanding microwave absorption performance of the MoS 2 -PANI nanocomposites is attributed to three factors, including enlarged specific surface area, reduced particle size and increased electrical conductivity .
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2024
·
IF 3.7
Ruiqi Li,Wenhang Chen,Junqing Li,Chunhong Zhang,Yueling Sun,XiaoYan Tang,Yuan Liu
Membrane separation technology offers a sustainable and efficient solution to wastewater management; however, membrane fouling significantly impedes its application. Photocatalytic membranes, integrating photocatalytic and membrane separation technologies, enhance membrane separation efficacy while effectively mitigating organic and biological contaminations. In this work, Ag2S/PANI@PES composite membranes were prepared via a facile in situ polymerization and successive layer adsorption technique. The modified poly(ether sulfone) (PES) membrane demonstrated improved hydrophilicity and separation performance, and its heterostructure between polyaniline (PANI), Ag0, and Ag2S effectively addressed organic fouling issues. Moreover, Ag2S/PANI@PES exhibited outstanding antimicrobial properties, as well as chemical and mechanical stability.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
THERMOCHIMICA ACTA
·
2017
·
IF 2.236
Siyu Wang,Yini Li,Jie Wang,Shaoxu Wang,Quan Shi,Zhicheng Tan
We found a new way to prove the interaction between the two components in polyaniline (PANI-DTA)/La composites by studying the specific heat. It is firstly found that PANI-DTA has a phase transition peak at −50 °C. The composites (PLa) have no phase transition at −50 °C, so the thermal, magnetic and electrochemical properties are different from PANI-DTA. The heat capacities of the composites are higher than that of PANI-DTA and La complex. the magnetic field dependence of magnetization (M–H) curves of PANI-DTA and PLa-2 exhibit saturation magnetization and a hysteresis loop. The electrochemical performance of the composites are greatly improved compared with PANI-DTA and La complex.
研究领域:
材料科学
·
复合材料
·
热力学
·
电化学
·
磁学
✓ 已验证
产品关联
DOI
高影响因子
SYNTHETIC METALS
·
2022
·
IF 4
Yuhua Dong,Yuanyuan Yin,Xueyan Du,Chunmei Liu,Qiong Zhou
A near-infrared (NIR) light-induced shape memory-assisted self-healing coating was developed by incorporating Ti 3 C 2 MXene and polyaniline (PANI) composites into epoxy resin. Ti 3 C 2 thin nanosheets were obtained by etching Ti 3 AlC 2 powders with HCl and LiF and then intercalating with tetramethylammonium hydroxide. Then MXene@PANI composites were synthesized through chemical oxidation . Result of ultraviolet–visible spectroscopy showed two obvious characteristic peaks at visible and NIR light range, indicating that the MXene@PANI composite could be used as photothermal agents to induce shape memory effect of the epoxy resin. Results of electrochemical impedance spectra and scanning vibrating electrode technique indicated that the addition of 5 wt% MXene@PANI to the epoxy resin coating could improve its protection performance, and own 91% self-healing efficiency due to the NIR absorbing ability of MXene and PANI and the passivation of PANI. Linear scanning voltammetry measurements indicated that the shape memory effect and self-healing performance of the epoxy resin matrix were affected by the corrosion product in the scratched area.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ChemistrySelect
·
2024
·Vol. 9
·期 17
·e202401101
·
IF 1.9
Xiangming Hu,Zhenyu Yang,Mingyue Wu,Yuntao Liang,Wei Wang,Fusheng Wang,Qian Zhang,Jingran Mao,Ning Yang,Xuwei Wang
Graphical This paper selectes MBioFs with copper ions as the metal center to design an MBioFs/PANI composite suitable for CO gas sensors. The morphology and nanostructure of the prepared materials were thoroughly analyzed, followed by testing their gas-sensing properties. Subsequently, the gas sensing mechanism of composite materials was proposed and discussed in detail. In addressing the issue of poor gas sensitivity in semiconductor CO sensor materials used in mining, such as pure PANI. This study utilized an ice-water bath in combination with an in-situ polymerization method to synthesize a new composite material consisting of Cu(II)-racemic glutamate nanofibers and PANI. The morphology, structure, and chemical bonds of the composite material were analyzed using scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS) and spectral analysis. The material's ability to detect CO (100–500 ppm) at room temperature was investigated, revealing a response value of up to 6.8 % for 400 ppm CO detection when the composite material was deposited on a ceramic interdigital electrode. The material exhibited good selectivity and responsiveness to CO detection at room temperature, attributed to the heterojunction formed between Cu(II)-racemic glutamate nanofibers and PANI, which enhanced carrier migration. Consequently, the Cu(II)-racemic glutamate nanofiber/PANI composite(Cu(II)-RGlu/PANI) material shows promise as a high-performance sensing material for CO detection at room temperature and as a low-power, integrable sensor material for underground coal mines. This research contributes to the development of a theoretical framework for such applications.
研究领域:
材料科学
·
传感技术
✓ 已验证
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 110
·90969-90975
·
IF 3.84
Jian Li,Yanqing Xu,Mengqing Hu,Jiangnan Shen,Congjie Gao,Bart van der Bruggen
The application of electrodialysis (ED) for desalination requires the use of natural seawater or river water, in which the presence of multivalent ions is inevitable. This currently limits the process performance. Membranes with selectivity for monovalent ions may overcome this limitation. This study used the method of electro-deposition with chitosan/aniline polymer as a modification material to coat a commercial anion exchange membrane in view of obtaining selectivity for monovalent ions. Chitosan was grafted with polyaniline through copolymerization using ammonium persulfate as an initiator. FTIR spectra of the composites revealed that there was a strong interaction between substituted polyanilines and chitosan. The method was used to prepare a series of membranes by varying the aniline ratio and polymerization time. The chemical composition and surface properties of the membranes were characterized by Fourier transform infrared (FTIR) spectroscopy and scanning electron microscopy (SEM), respectively. Current–voltage curves and resistance were measured to characterize the transport properties of the membranes and the membrane conductivity. The results show that the membrane conductivity increases with the aniline ratio; the selectivity initially increases with the aniline ratio, and then decreases again. The optimum modification condition was an electrodeposition time of 4 h with an aniline ratio of 0.4. Using the modified membrane in concentrated sea water, it was demonstrated that the modified membrane has an excellent selectivity towards monovalent cations.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）