PROGRESS IN ORGANIC COATINGS
·
2021
·
IF 5.161
Anxiang Li,Aiping Zhu
Spherical Fe 3 O 4 /polyaniline(PANI) nanocomposites with core-shell structure were prepared by oxidative polymerization of aniline on the Fe 3 O 4 − /aniline(ANI) + nanocomposite template formed by the electrostatic interaction between nano-Fe 3 O 4 and aniline salt. FTIR and UV–Vis results indicate that there is coordination interaction between Fe 3 O 4 and PANI interface. SEM and TEM results show that the thickness of PANI shell increases with the increase of aniline/Fe 3 O 4 mass ratio. Compared with PANI, Fe 3 O 4 /PANI nanocomposites maintain obvious redox activity in neutral medium. The organic composite coating was prepared by filling Fe 3 O 4 /PANI nanocomposites into waterborne acrylate/amino baking paint. The results show that the composition ratio of aniline/Fe 3 O 4 has a great influence on the metal anticorrosive activity of Fe 3 O 4 /PANI nanocomposites. The long-term metal corrosion resistance of Fe 3 O 4 /PANI(1:2) composite coating is three times as compared with unfilled organic coating . The metal anticorrosive mechanism of Fe 3 O 4 /PANI nanocomposites has been revealed to be the excellent nano-barrier effect and the metal surface passivation .
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
CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Zhen Wang,Zhi Cheng,Li Xie,Xianliang Hou,Changqing Fang
Ti 3 C 2 T x MXene has been explored as an efficient electromagnetic interference (EMI) shielding material because of its high electrical conductivity , large specific surface area, rich surface defects , and abundant functional groups. Herein, core-shell Fe 3 O 4 @PANI composites were prepared, followed by the preparation of a flexible and lightweight Ti 3 C 2 T x /Fe 3 O 4 @PANI composite film with sandwich intercalation structure by vacuum-assisted filtration, using Ti 3 C 2 T x MXene as a matrix material. The ultrathin composite film with a Ti 3 C 2 T x nanosheets to Fe 3 O 4 @PANI weight ratio of 12:5 reached a maximum EMI shielding effectiveness (SE) value of 58.8 dB at a thickness of only 12.1 μm. This is much higher than the SE of pure conductive Ti 3 C 2 T x films of the same thickness. After adjusting the film thickness by increasing the concentration of Ti 3 C 2 T x , an SE of 62 dB was achieved at a thickness of 16.7 μm. The ultrathin Ti 3 C 2 T x /Fe 3 O 4 @PANI films exhibit potential for application in packaging, wearable electronic equipment, and military fields. Moreover, they provide insight into the preparation of lightweight and progressive electromagnetic shielding materials.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
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
CHEMOSPHERE
·
2022
·
IF 8.943
Wen Huang,Jie Zhou,Qian Hu,Bin Qiu,Mina Huang,Vignesh Murugadoss,Zhanhu Guo
The magnetite@polyaniline (Fe 3 O 4 @PANI) composites with different Fe 3 O 4 loadings were prepared, and their effect on methane production in anaerobic systems was investigated. The Fe 3 O 4 @PANI composite with a 40% loading of Fe 3 O 4 showed a better performance on accelerating methane production rate than other composites. The methane production rate was increased by 26.98% at the Fe 3 O 4 @PANI dosage of 0.6 g L −1 . The results of the contact angle and CLSM revealed that Fe 3 O 4 @PANI had a good bio-affinity and contact directly with bacteria and archaea. Then the mechanisms related to the enhancement of methane production by the composites were explored by the species annotation and enzyme activity . It showed that Fe 3 O 4 @PANI promoted the enrichment of DIET-related functional bacteria and archaea and improved the enzyme activity related to the acetoclastic methanogenic pathway.
研究领域:
环境工程
·
生物技术
·
废水处理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2011
·Vol. 18
·期 5
·1467-1475
·
IF 5.476
Chenglong Hu,Yujie Chen,Xudong Chen,Bin Zhang,Jin Yang,Juying Zhou,Ming Qiu Zhang
Graphical Hybrid materials : The internal micro-magnetic field (IMMF) effect in Fe 3 O 4 @PANI-CdS photoelectric active hybrid nanocomposites was found to improve their power conversion efficiencies ( PCE ) by increasing the number of singlet polaron pairs through field-dependent intersystem crossing (ISC). The PCE of as-prepared nanocomposites was improved from 1.135 to 3.563 % with changes in IMMF from 0 to 1.2×10 −3 emu g −1 (see figure). In this paper, the effect of the internal micro-magnetic field (IMMF) on the photocurrent property of conjugated polymer/inorganic semiconductor nanocomposites is reported and analyzed. By using the redox reaction, magnetic Fe 3 O 4 nanoparticles were coated on the surface of highly active nanorods of conjugated polyaniline (PANI), forming an internal micro-magnetic electron donor (i.e., Fe 3 O 4 @PANI). After subsequent incorporation of CdS nanoparticles (serving as electron acceptors), the power conversion efficiency ( PCE ) of the system (Fe 3 O 4 @PANI-CdS) was found to be as high as 3.563 %, contrasting sharply with the value (1.135 %) of the hybrid without Fe 3 O 4 (PANI-CdS). This obvious enhancement originated from the fact that the IMMF increased the number of singlet polaron pairs through field-dependent intersystem crossing (ISC), giving a positive contribution to the photocurrent generation. Additionally, the dependence of the photocurrent on the remnant magnetization of the Fe 3 O 4 @PANI-CdS nanocomposites was investigated. A percolation behavior was observed, which was due to the appearance of interpenetrating networks consisting of donor and acceptor phases, leading to the recombination of charge carriers through trapping. The outcomes of the present work might help to produce a new family of conjugated organic/inorganic semiconductor nanocomposites with designed optoelectronic performances.
研究领域:
材料科学
·
光电子学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Xiang Luo,Haifeng Li,Dongdong Deng,Lu Zheng,Yubo Wu,Wenjun Luo,Meijie Zhang,Rongzhou Gong
Fe 3 O 4 , as a typical absorber, its electromagnetic wave (EMW) absorption properties are far from meeting the requirements of practical application due to its poor impedance matching. In this study, three kinds of novel heterogeneous structured composites, dendritic Fe 3 O 4 @(HCl doped PANI), Fe 3 O 4 @(p-TSA doped PANI) and Fe 3 O 4 @(dedoped PANI), were prepared via hydrothermal method combined with thermal reduction and in-situ polymerization, and their phase composition, microscopic morphologies, static magnetic properties , EMW absorption performance and absorption mechanisms were investigated. The results showed that the introduction of different medium doped and dedoped PANI greatly enhanced the EMW absorption performance of Fe 3 O 4 . The outstanding advantages of Fe 3 O 4 @(HCl doped PANI) were that the widest effective absorption bandwidth ( EAB ) up to 6.08 GHz in a relatively thin thickness of 2.1 mm. And the Fe 3 O 4 @(dedoped PANI) composite achieved strong absorption ability (− 53.08 dB@3.04 GHz) at low frequency in a relatively thin thickness (4.9 mm). The remarkable improvement of EMW absorption performance of dendritic Fe 3 O 4 @PANI composites could be attributed to the introduction of dissipation mechanisms, the optimization of impedance matching characteristics and the formation of appropriate conductive network microstructure. The dendritic Fe 3 O 4 @PANI composites are promising EMW absorption materials and have great practical application value.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2017
·Vol. 5
·期 8
·4058-4066
·
IF 8.867
Jian Zhang,Jie Han,Minggui Wang,Rong Guo
Multifunctional magnetic adsorbents containing MnO2 and polyaniline (PANI) with optimized adsorption properties toward heavy metal ions have been developed. In particular, Fe3O4 spheres were chosen as the magnetic core, followed by PANI and MnO2 coating, realizing the formation of Fe3O4/PANI/MnO2 core–shell hybrids. The as-synthesized Fe3O4/PANI/MnO2 core–shell hybrids showed a hierarchical structure with a large surface area and high magnetic saturation value. In comparison with Fe3O4/PANI and Fe3O4/MnO2 core–shell hybrids, Fe3O4/PANI/MnO2 core–shell hybrids displayed the highest adsorption capacity toward heavy metal ions (including Cd(II), Zn(II), Pb(II) and Cu(II)), thanks to the integrated physical and chemical adsorption behaviors resulting from MnO2 inorganic oxide and the PANI polymer. The developed multifunctional Fe3O4/PANI/MnO2 adsorbents synthesized by a facile and economic route are believed to show high potential in environmental remediation for heavy metal removal.
研究领域:
环境科学
·
材料化学
·
纳米技术
·
水处理
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Xuelin Wang,Chenjian Li,Haoran Geng,Jian Xie,Zhimin Chen,Xiaolin Zhang,Chuanxi Xiong,Shan Wang
Molybdenum disulfide (MoS 2 ) has been considered as an excellent candidate for microwave absorption applications due to its appropriate electrical conductivity and large area size. In this study, the MoS 2 /Fe 3 O 4 /PANI nanocomposite (MFP), a MoS 2 based ternary composite absorbing material with multiple heterostructures is prepared through composite with ferroferric oxide (Fe 3 O 4 ) and polyaniline (PANI) and exhibits excellent microwave absorbing performance. Owning satisfactory impedance matching and multiple interfacial polarization, the minimum reflection loss of MFP can reach −50.3 dB at a thickness of 2.6 mm, and the effective absorption bandwidth is 5.1 GHz. Meanwhile, the whole X and Ku-band absorption can also be achieved with specific MoS 2 loading at an optimized thickness. The ternary composite enhances the ability of electromagnetic waves attenuation by reducing dielectric constant and improving impedance matching, which is a novel medium adjusting strategy to provide a new insight for MoS 2 in the field of microwave absorption and national defense security stealth technology.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
Science China-Technological Sciences
·
2017
·Vol. 60
·期 5
·749-757
·
IF 1.719
Zhu YuMei,Zhou XiaoWei,Chen DongSheng,Li Fang,Xue Tao,Farag Ahmed Saad
Magnetic Fe 3 O 4 @PANI@Au nanocomposites are fabricated through electrostatic self-assembly and seed growth methods. The rate constant K
app is calculated to be 8.63×10 −3 s −1 at room temperature for the reduction of 4-nitrophenol to 4-aminophenol with an excessive amount of NaBH4 as a model system showing outstanding catalytic efficiency and stability. For recyclable performance, the catalyst exhibits slight loss in catalytic performance on the conversion of 4-nitrophenol after running for more than 10 cycles. Besides, the smaller and simpler the structure, the easier the molecular structure can be degraded, and the faster the cationic dyes can be degraded than the anionic dyes, which can reveal the selectivity. For practical application, Congo red as a pollutant of the lake water is degraded rapidly after Fe 3 O 4 @PANI@Au is added to the solution in a few minutes. It has been demonstrated that magnetic Fe 3 O 4 @PANI@Au nanoparticle composite is a promising catalyst for environment sewage.
研究领域:
纳米催化
·
环境化学
·
材料科学
·
污染治理
·
应用化学
✓ 已验证
DOI
高影响因子
Materials Research Express
·
2020
·Vol. 6
·期 12
·125621
·
IF 1.929
Haopeng Cai,Bo Cheng,Hongbo Xiao,Qinqin Wei
A novel rGO/p-Fe3O4@PANI three-phase nanomaterial was prepared by coating conductive polyaniline (PANI) on reduced graphene oxide (rGO) and porous Fe3O4 (p-Fe3O4), which can increase the reflection interface of electromagnetic waves and extend the reflection path of electromagnetic waves propagating inside the material, and between them. Three kinds of rGO/p-Fe3O4@PANI samples were prepared. The mass percentage of PANI in the samples was established. The mass ratio of rGO to p-Fe3O4 was changed to ameliorate the impedance matching and attenuation constant. Compared with rGO/p-Fe3O4, rGO/p-Fe3O4@PANI exhibits excellent electromagnetic wave absorption performance. When the mass ratio of rGO to p-Fe3O4 in the 40 wt% three-phase material is 1:5 and the thickness is 2.5 mm, the minimum RL of rGO/p-Fe3O4@PANI is −41.38 dB at 9.75 GHz and the effective absorption bandwidth to electromagnetic wave reaches 3.08 GHz (from 8.40 to 11.48 GHz), indicating that is a potentially attractive candidate for high efficiency electromagnetic wave absorbers. The combination of the conductive polymer, porous magnetic nanoparticles and rGO improves the impedance matching condition to some extent, and effectively increases the attenuation constant of the material.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2015
·
IF 4.513
Wanying Zhu,Guoyi Jiang,Lei Xu,Bingzhi Li,Qizhi Cai,Huijun Jiang,Xuemin Zhou
Based on magnetic field directed self-assembly (MDSA) of the ternary Fe 3 O 4 @PANI/rGO nanocomposites, a facile and controllable molecularly imprinted electrochemical sensor (MIES) was fabricated through a one-step approach for detection of glutathione (GSH). The ternary Fe 3 O 4 @PANI/rGO nanocomposites were obtained by chemical oxidative polymerization and intercalation of Fe 3 O 4 @PANI into the graphene oxide layers via π–π stacking interaction, followed by reduction of graphene oxide in the presence of hydrazine hydrate . In molecular imprinting process, the pre-polymers, including GSH as template molecule, Fe 3 O 4 @PANI/rGO nanocomposites as functional monomers and pyrrole as both cross-linker and co-monomer, was assembled through N–H hydrogen bonds and the electrostatic interaction , and then was rapidly oriented onto the surface of MGCE under the magnetic field induction. Subsequently, the electrochemical GSH sensor was formed by electropolymerization. In this work, the ternary Fe 3 O 4 @PANI/rGO nanocomposites could not only provide available functionalized sites in the matrix to form hydrogen bond and electrostatic interaction with GSH, but also afford a promoting network for electron transfer . Moreover, the biomimetic sensing membrane could be controlled more conveniently and effectively by adjusting the magnetic field strength. The as-prepared controllable sensor showed good stability and reproducibility for the determination of GSH with the detection limit reaching 3 nmol L −1 (S/N = 3). In addition, the highly sensitive and selective biomimetic sensor has been successfully used for the clinical determination of GSH in biological samples.
研究领域:
分析化学
·
生物医学工程
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Composites and Hybrid Materials
·
2022
·Vol. 5
·期 2
·1003-1016
·
IF 11.806
Xie Wenhao,Yao Feichong,Gu Hongbo,Du Ai,Lei Qin,Naik Nithesh,Guo Zhanhu
Herein, a novel three-dimensional nanocomposite aerogel (rGO/Fe 3 O 4 /PANI NAs) with outstanding magnetoresistance and piezoresistance was manufactured by the in-situ polymerized polyaniline nanoarrays (PANI NAs) surrounding magnetic reduced graphene oxide (rGO/Fe 3 O 4 ) aerogel that was prepared through the combination of hydrothermal method and lyophilization method. This rGO/Fe 3 O 4 /PANI NAs nanocomposite aerogel with 60 wt.% loading of PANI NAs well preserved the porous structure and gained a superior mechanical strength (121.04 kPa) compared with that of rGO aerogel, rGO/Fe 3 O 4 aerogel, and rGO/PANI NAs aerogel (43.54, 58.12, and 116.98 kPa, respectively). The rGO/Fe 3 O 4 /PANI NAs nanocomposite aerogel could hold its original state with almost 100% recovery ratio after cycling compression tests under 80% of deformation strain at a suitable compression rate of 5 mm min −1 . The introduction of PANI NAs into the rGO/Fe 3 O 4 aerogel also brought a satisfactory piezoresistive performance with a large gauge factor up to 2.83 and a superb stability for the electrical signal output (which was decreased only 5.80% after 500 compression cycles) to the rGO/Fe 3 O 4 /PANI NAs nanocomposite aerogel. The loading of Fe 3 O 4 and PANI NAs also provided rGO/Fe 3 O 4 /PANI NAs nanocomposite aerogel with a negative magnetoresistance value up to − 4.37%. The magnetoresistance was explained via the amelioration of spin transport in the material. The unique negative magnetoresistance and excellent piezoresistance make rGO/Fe 3 O 4 /PANI NAs nanocomposite aerogel a promising candidate for the development of advanced electronic devices. Graphical abstract A novel three-dimensional nanocomposite aerogel (rGO/Fe 3 O 4 /PANI NAs) exhibits amazing negative magnetoresistance and outstanding piezoresistive performance.
研究领域:
材料科学
·
纳米技术
·
电子学
·
复合材料
✓ 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）