APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Peng Tang,Mang Li,Jiawei Du,Yanfei Gong,Xuyang Zhang,Guohua Wu,Xiangwei Wang
In this study, a novel microwave absorber ferric oxide/polyaniline (Fe 3 O 4 /PANI) composite was successfully fabricated with 0-dimensional (0D) hollow Fe 3 O 4 nanospheres and 1-dimensional (1D) hollow polyaniline (PANI) nanotubes using hydrothermal treatment and chemical oxidative polymerization. The results demonstrate that the prepared Fe 3 O 4 /PANI composites exhibit remarkable microwave absorption (MA) properties. It possesses a minimum reflection loss (RL min ) of −55.03 dB and an effective absorption bandwidth (EAB) of 4.88 GHz with a thickness of 1.84 mm. When the thickness is increased to 1.88 mm, the composite achieves a maximum EAB (EAB max ) of 5.16 GHz (12.84–18 GHz) and an RL of −40.47 dB. The hollow structures of Fe 3 O 4 and PANI reduce the weight of the absorber and also enhance the synergistic loss effects, including interfacial polarization loss and multiple reflection and scattering loss, resulting in improved MA properties. The combination of hollow 0D/1D structures provides a novel approach in designing lightweight and efficient composite MA materials.
研究领域:
材料科学
·
电磁材料
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2023
·
IF 6.4
Lili Luo,Xiaohong Wang,Siyu Yang,Juguo Dai,Dongxu Li,Long Xia,Cheng Chi,Andreu Cabot,Yiting Xu,Lizong Dai
While asymmetric supercapacitors (ASCs) have huge potential as efficient, durable, and cost-effective energy storage devices, they fail to meet expectations because of the unoptimized architecture and composition of their electrode materials. Herein, PPy/PANI@MoS2 (PPMS) ternary composites with a dual-channel structure are obtained by facile hydrothermal and in situ polymerization methods. These dual conductive channels synergistically improve the electrode’s electrical conductivity, facilitate ion diffusion, enlarge the interlayer distance, and increase the accessible surface area. Taking advantage of such a favorable architecture, PPMS composites exhibit outstanding electrochemical properties, including a huge specific capacitance (1171 F g–1 at 1 A g–1) and rate capability (861 F g–1 at 20 A g–1) in three-electrode systems. Based on charge storage mechanism analyses, we demonstrate that the kinetic behavior of PPMS electrodes is dominated by the surface capacitance (95.9% at 100 mV s–1). Besides, PPMS-based ASCs (PPMS//activated carbon) operate in a broad voltage window (1.8 V), delivering an ultrahigh energy density of 93.4 Wh kg–1 at a power density of 884.8 W kg–1. They also show a superior cycling stability of 90.4% and a remarkable Coulombic efficiency of 99.2% for 10,000 cycles. This work affords an inspiration for rational structural optimization of PANI-based electrode materials with great prospects in the development of next-generation high energy density ASCs.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
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
研究领域:
材料科学
·
腐蚀工程
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
IONICS
·
2019
·Vol. 25
·期 10
·4739-4749
·
IF 2.289
Han Tao,Han Jia-Jun,Ma Hui,Zhang Ning,Sun Dan-Dan
Graphene oxide (GO) was synthesized by the modified Hummers method and then reduced with NaBH 4 to form RGO with a regular layered structure. The graphene oxide is benzenesulfonated to obtain a functionalized graphene material (RGO-BS). The benzenesulfonated polyaniline/RGO composite (PANI/RGO-BS) was prepared by adsorption double oxidation method using RGO as template. Some physical characterization methods (X-ray diffraction, Fourier-transform infrared spectroscopy, and scanning electron microscopy) were used to analyze the morphology and crystallinity of the composite. The electrochemical properties were characterized by cyclic voltammetry, impedance spectroscopy, galvanostatic charge/discharge, and rate capability. The initial discharge specific capacities of oxidized PANI/RGO-BS and reduced PANI/RGO-BS were 165.4 and 176 mAh/g. After 100 cycles, the capacity retention rates were 92.6% and 96%, the coulombic efficiency of the battery is close to 100%. These results indicate functionalized composite has exciting potentials for the cathode material of lithium-ion battery.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
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.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Xishun Peng,Yiheng Yuan,Anjiang Lu,Cunwei Wang,Caizhen Zu,Haili Zhang,Zhongchen Bai
Glyphosate (Gly) residues in agricultural products have a serious health risk, so it is urgent to seek a sensitive and convenient method for recognizing Gly residues in food. In this study, we proposed an electrochemical surface-enhanced Raman spectroscopy (EC-SERS) sensor of polyaniline/reduced graphene oxide/Ag/Cu (PANI/RGO/Ag/Cu) film to detect Gly residues. The EC-SERS sensor of PANI/RGO/Ag/Cu film had a large specific surface area, which could increase the binding sites of cu 2+ /Gly clathrates for boosting specifically its SERS signal. Moreover, Ag/Cu nanoparticles on the surface of film could effectively increase the differential pulse voltammetry signal and SERS signal of Gly molecules. The limit of detection of EC-SERS sensor to Gly could reach 1.9 nM. In addition, the EC-SERS sensor we prepared could also sensitively identify Gly residues on fresh fruit peels. The PANI/RGO/Ag/Cu film we proposed in this paper has great potential for selective and accuracy detecting Gly residues in agricultural products.
研究领域:
食品科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Benlong Wei,Zhuannian Liu
Hybrid capacitive deionization (HCDI) is an innovative CDI technology that outperforms conventional CDI concerning desalination capability and charge efficiency. However, underutilized cathodes or anodes and mismatched kinetic behavior remain unsatisfactory given the imbalanced device architecture consisting of the capacitor and Faraday electrodes. Herein, we proposed a pseudo-capacitive behaviors induced dual-ion selective deionization (Di-CDI) strategy where molybdenum disulfide/polypyrrole (MoS 2 /PPy) acted as Na + intercalation cathode, and Ag-coated polyaniline-modified activated carbon (Ag@PANI/AC) served as Cl − trapping anode. In this system, the hollow PPy nanotube as the core is anchored by ultrathin MoS 2 nanoflakes, connecting loose MoS 2 nanoflowers to form a 3D flower-chain network, which holds convenient electron transfer routes and fast charge transport channels, facilitating accelerated ion diffusion process. Besides, Ag@PANI/AC was synthesized by modifying Ag particles on a 3D electron conduction substrate constructed by coupling PANI and AC, where Ag is responsible for the conversion reaction with Cl − to create AgCl. The conduction matrix compensates for the low conductivity of AgCl, enabling fast adsorption kinetics. As expected, the assembled Di-CDI system MoS 2 /PPy//Ag@PANI/AC delivers an excellent adsorption capacity of 25.1 mg g -1 , outstanding desalination rate (5.88 mg g -1 min -1 ), superior cycle stability (91.5% retention rate), and promoted charge efficiency of 56.2%, validating that this strategy supplies a viable way to achieve more energy-efficient CDI.
研究领域:
材料科学
·
环境科学
·
电化学工程
✓ 已验证
产品关联
DOI
高影响因子
CURRENT APPLIED PHYSICS
·
2021
·
IF 2.48
Weiyuan Gu,Hongyan Zhang,Chu Chen,Jun Zhang
ZnO/PANI composite humidity sensor was prepared by hydrothermal method . The first principles of density functional theory study the sensing mechanism. The calculation shows that the oxygen vacancy on ZnO surface is beneficial to the adsorption of water molecules. The {0 0 0‾1} crystal plane with the largest lattice oxygen number in ZnO has a strong adsorption capacity for water molecules, which is also conducive to improving the humidity sensitivity. PANI is easy to be combined on {0 1‾1 0} plane of ZnO, and it indirectly promotes the growth of {0 0 0‾1} plane, increasing the adsorption of water molecules and the proportion of H + and H 3 O + ions. In addition, the N–H group in ZnO/PANI enhances the H + conduction, which further improves the performance of the sensor. The results concluded that the proportion of lattice oxygen in humidity sensor is an important factor of humidity sensor sensitive detection.
研究领域:
材料科学
·
传感器技术
·
理论计算
✓ 已验证
产品关联
DOI
高影响因子
ANTI-CORROSION METHODS AND MATERIALS
·
2024
·Vol. 71
·期 6
·650-662
·
IF 2.3
Xi Jin,Hui Xu,Qifeng Zhao,Hao Zeng,Bing Lin,Ying Xiao,Junlei Tang,Zhen Nie,Yan Yan,Zhigang Di,Rudong Zhou
PurposeThis study aims to report the development and experimental evaluation of two kinds of PANI@semiconductor based photocathodic anti-corrosion coating, for application on stainless steel substrates.Design/methodology/approachPANI wasin situchemical polymerized on TiO2and BiVO4particles, and FT-IR and SEM/EDS were used to understand the characteristics and elemental distribution of the composite particles. Composite coatings, which consisted of epoxy, PANI@TiO2or PANI@BiVO4and graphene, were prepared on the 304L stainless steel. Photoelectrochemical response measurement, electrochemical tests and immersion tests were used to assess the anti-corrosion performance of the prepared coatings in 45°C 3.5 wt.% NaCl solution. And the corrosion protection mechanism was further explained by combining with surface observation.FindingsThe photoelectrochemical response tests revealed the good photocathodic effect of the coatings, and the reversible oxidation-reduction properties of PANI (pseudocapacitive effect) leading to the repeated usage of the coatings. Consequently, the anti-corrosion mechanism of the composite coating is attributed to the physical barrier effect of the coating, the anodic protection effect of PANI and the photocathodic and energy store effect.Originality/valueThese kind coatings could prevent corrosion from day to night for stainless steel, which has great engineering application prospects on stainless steel corrosion protection.
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
产品关联
DOI
高影响因子
Frontiers in Chemistry
·
2018
·
IF 4.155
Zhu Chonghui,Cheng Xiaoli,Dong Xin,Xu Ying ming
PANI/TiO2 nanocomposites spheres were synthesized using a simple and efficient one-step hydrothermal process. The morphology and structure of PANI/TiO2 nanocomposites spheres were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) techniques. The PANI/TiO2 nanocomposite sphere-based sensor exhibits good selectivity, sensitivity (5.4 to 100 ppm), repeatability, long-term stability and low detection limit (0.5 ppm) to ammonia at room temperature (20 ± 5°C). It also shows a good linearity relationship in the range of 0.5–5 and 5–100 ppm. The excellent NH3 sensing performance is mainly due to the formation of the p-n heterostructure in the nanocomposites.
研究领域:
材料科学
·
化学传感器
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2018
·Vol. 29
·期 17
·14803-14812
·
IF 2.324
Zhang Kun,Li Na,Wang Yi,Ma Xiaoxuan,Zhao Jiupeng,Qiang Liangsheng,Hou Shuai,Ji Junyi,Li Yao
A improved bifunctional nanostructure composite was designed and fabricated as reversible electrodes for electrochromic film and lithium-ion battery. This unique optic-electro responsive urchin-like architecture assembled from WO 3 @PANI nanobelts were prepared by solvothermal and electropolymerization methods. As expected, the composite exhibits the superior optical-electrochemical performances. The composite owns quick switching time ranging from purple, green, yellow, gray to blue via voltage regulation, better rate performance and long-term cycling stability in the galvanostatic charge/discharge process. Benefited from stable structure and short diffusion path, it also demonstrates a distinct optical modulation (△T = 45%) and excellent durability after long-term cycles (1200 cycles). The as-prepared electrode exhibits outstanding cycling stability (capacity retention of 516 mAh g −1 after 1200 cycles with a low average fading capacity of ca. 0.103 mAh g −1 and fading cyclic rate of ca. 0.02% per cycle). The long-term stability studies reveal that urchin-like composite has much more excellent optical and electrochemical durability. The morphology and structure of the composite were carried out by characterization equipment. This effective synthesis strategy will have profound implications for developing the other inorganic–organic nanocomposites in optical and electrochemical field.
研究领域:
材料科学
·
纳米技术
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2022
·Vol. 33
·期 10
·8292-8304
·
IF 2.779
Song Xiaodong,Yan Luting,Dai Chunai,Hao Changshi,Guo Hao,Xie Mingming,Zhang Yaru
Complementary devices with double-hybrid electrodes are prepared, assembled, and studied to improve the performance of complementary devices and take advantage of the excellent performance of composite electrochromic films. WO 3 films are prepared through the seed-assisted hydrothermal method, and polyaniline (PANI) is coated on WO 3 via electrochemical deposition. The electrochemical and electrochromic properties of the WO 3 /PANI composite films are better than those of WO 3 films. The improvement in the electrochromic properties of the WO 3 /PANI composite films is mainly due to PANI’s modification of the surface morphology of the WO 3 films and its excellent conductivity. Then, a complementary device with a double-hybrid electrode is assembled. The WO 3 /PANI and NiO/PB electrode films are used as the cathode and anode of the device, respectively, and KCl solution is employed as the electrolyte. The light modulation range of the complementary device is 55.71%, the coloring time is t c = 3.2 s, the bleached time is t b = 8.1 s, and the coloring efficiency is 24.63 cm 2 ·C −1 . All of these values are better than those of the single WO 3 and NiO devices. The electrode reaction process of the complementary device is synchronous and synergetic. Thus, the device exhibits good electrochromic performance.
研究领域:
材料科学
·
电化学
✓ 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）