RSC Advances
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2019
·Vol. 9
·期 44
·25932-25941
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IF 3.049
Ailing Feng,Mingliang Ma,Zirui Jia,Meng Zhang,Guanglei Wu
In this work, a novel CF@NiFe2O4 composite coated with phytic acid-doped polyaniline (CF@NiFe2O4@p-PANI) was facilely synthesized. First, a typical solvothermal reaction was applied to obtain the CF@NiFe2O4 composite, and then the phytic acid-doped polyaniline was grown in situ on the surface of the CF@NiFe2O4 composite. The morphological structure, chemical composition, and surface functional group distribution of this hybrid were systematically evaluated. The magnetic saturation (Ms) value of the hybrid is 29.9 emu g−1, which represents an improvement in the magnetic loss. According to its reflection loss curve, the hybrid exhibits a superior EM wave absorption capacity, with a minimum reflection loss value and effective absorbing bandwidth of −46 dB when the sample thickness is 2.9 mm, and an effective absorption bandwidth of 5 GHz when the sample thickness is 1.5 mm. The excellent performance of this hybrid can mainly be attributed to its ideal matching of magnetic loss and dielectric loss, interfacial polarizations, eddy current loss and interface relaxation. This new material has the potential to be a superior electromagnetic wave absorber or applied as a functional filler to modify resin matrices.
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Chunli Zhou,Dengke Wang,Ang Li,Erzhuang Pan,Haiyan Liu,Xiaohong Chen,Mengqiu Jia,Huaihe Song
Porous carbon (PC) materials are the excellent alternative to anodes of high performance sodium ion batteries (SIBs). However, most PC materials are prepared with complicated and multi-step template method, which limits the mass production. Herein, we present a simple and repeatable calcination approach to synthesize three-dimensional porous carbon (3D-PC) materials using poly( p -phenylenediamine) hydrogel as precursor. N, O and P heteroatoms are successfully introduced into 3D-PC to provide more sodium storage sites. The obtained 3D-PC delivers high sodium storage capacity of 332 mAh g −1 at 50 mA g −1 and the reversible capacity still retains 139 mAh g −1 at 10 A g −1 . Moreover, 3D-PC also shows ultralong cycling life, the stable capacities of 212 mAh g −1 and 120 mAh g −1 after 1000 cycles even at the high current density of 0.5 A g −1 and 5 A g −1 , respectively. These results illustrate that 3D-PC electrode displays great rate capability and excellent cycling stability, which would be ascribed to surface-dominated sodium storage mechanism according to quantitative analysis. This method is low cost and effective for preparing high-performance porous carbon anodes for SIBs.
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高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
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2018
·Vol. 317
·期 2
·701-714
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IF 1.181
Zhang W.,Tan N.,Hou D.,Lin Y. W.,Yan X. M.,Gao Y.,He D. X.,Jiang M.,Wang J.
Uranyl ion-imprinted polymers (U(VI)-IIPs) were successfully prepared by combining phytic acid as the functional monomer, uranyl ion (UO 2 2+ ) as the template, and tetraethyl silicate (TEOS) as the cross-linker with the marine facultative fungus Fusarium sp. #ZZF51 addicted to U (VI) mycelium through the ion-imprinted sol–gel method. Single-factor experiments were performed to optimize the preparation conditions and the prepared materials were better characterized with FTIR, SEM and BET meter. The optimum adsorption conditions were explored by single-factor experiments and BBD response surface method in detail. The adsorption–desorption recycling and adsorption selectivity experiments revealed that U(VI)-IIPs had a good stability and selectivity. The U (VI) adsorption process of U(VI)-IIPs was better described by the pseudo-second order kinetic equation and Langmuir isotherm model.
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高影响因子
ACS Applied Energy Materials
·
2018
·
IF 0
Tingting Liu,Bomin Feng,Xiuju Wu,Yanli Niu,Weihua Hu,Chang Ming Li
It is desirable yet challenging to develop highly active and durable hydrogen evolution reaction (HER) electrocatalysts with Pt-comparable activity for future energy devices. In this work, we report Ru2P nanoparticle decorated P/N dual-doped carbon nanofibers on carbon cloth (Ru2P@PNC/CC-900) as a highly efficient and durable hierarchical HER electrocatalyst in both acidic and alkaline media. Electrochemical tests show that this Ru2P@PNC/CC-900 possesses Pt-comparable HER activity to support 10 mA cm–2 HER current density at low overpotential of 15 and 50 mV in acidic and alkaline condition, respectively. Density functional theory calculations reveal that coupling Ru2P nanoparticles with heteroatom-doped carbon fibers leads to enhanced intrinsic HER activity. The integrative hierarchical architecture further endows high surface areas with good mechanical robustness to support abundant catalytically active sites and possesses excellent electrical conductivity and efficient access for mass transportation to facilitate the HER process.
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ELECTROCHIMICA ACTA
·
2018
·
IF 5.116
Tingting Liu,Heng Liu,Xiuju Wu,Yanli Niu,Bomin Feng,Wei Li,Weihua Hu,Chang Ming Li
Molybdenum (Mo) based materials including its phosphides, carbides, nitrides , oxides, dichalcogenides and metallic alloys have received particular interest in recent years for sustainable hydrogen evolution reaction (HER) electrocatalysis . In this study, a novel Mo 2 C/MoP hybrid nanoparticle embedded N, P co-doped carbon nanofibers on carbon fiber paper (Mo 2 C-MoP NPC/CFP-800) is successfully prepared as a highly efficient hierarchical HER electrocatalyst . Benefitting from its structural advantages and compositional merits, this Mo 2 C-MoP NPC/CFP-800 electrocatalyst displays remarkable catalytic activity as well as excellent durability for HER. Only 85 and 146 mV overpotential is required to drive a HER current density of 10 mA cm −2 in acidic and alkaline solution, respectively. Remarkably, this electrocatalyst is also able to fulfill efficient HER even in seawater . Further, this work reveals that the Mo 2 C/MoP hybrid nanoparticle is superior to MoP nanoparticle under present system in HER electrocatalysis, which may offer valuable clues on further design and synthesis of HER electrocatalysts.
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高影响因子
ChemElectroChem
·
2018
·Vol. 5
·期 17
·2464-2474
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IF 4.446
Zhangxing He,Yingqiao Jiang,Jing Zhu,Yuehua Li,Lei Dai,Wei Meng,Ling Wang,Suqin Liu
Graphical P doped CNTs are prepared as catalysts for VO 2+ /VO 2 + redox reaction for vanadium redox flow batteries (VRFB) by high-temperature pyrolysis at different temperatures. The electrocatalytic properties of CNTs for the VO 2+ /VO 2 + redox reaction are significantly enhanced by P doping. The sample treated at 800 °C exhibits the highest electrocatalytic activity. This sample can act as superior catalyst to improve the energy storage performance of VRFBs. In this paper, phosphorus doped (P doped) multi-walled carbon nanotubes (CNTs) were prepared and investigated as catalyst for VO 2+ /VO 2 + redox reaction for vanadium redox flow batteries (VRFB). X-ray photoelectron spectroscopy (XPS) confirms the equable incorporation of P atoms into carbon layers of the CNTs, and that P doping has no obvious effect on the morphologies of the CNTs. The results of cyclic voltammetry and electrochemical impedance spectroscopy indicate that the electrocatalytic properties of the CNTs are significantly enhanced for the VO 2+ /VO 2 + redox couple by P doping. The sample treated at 800 °C (CNTs-P8) exhibits the highest electrocatalytic activity, with two times higher peak currents for the redox reaction catalyzed by CNTs-P8 deposited on glassy carbon than for pristine CNTs. A dynamic cell using the CNTs-P8 catalyst for VO 2+ /VO 2 + redox couple was assembled and the cell performance was evaluated. This cell exhibits better electrochemical properties including higher discharge capacity and energy efficiency, especially at high current density. The average energy efficiency of the cell for 50 cycles increases by 4.2 % at 50 mA cm −2 by using CNTs-P8. This study demonstrates that the P doped CNTs are an efficient and promising catalyst material for VO 2+ /VO 2 + redox reaction in VRFB systems.
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高影响因子
CELLULOSE
·
2018
·Vol. 25
·期 8
·4791-4803
·
IF 3.809
Liu Longxiang,Huang Zunchu,Pan Ying,Wang Xin,Song Lei,Hu Yuan
In this study, we finished cotton fabrics with polyethylenimine (PEI)/melamine and phytic acid (PA) by layer-by-layer assembly to enhance their flame retardant properties. Subsequently, the flame retardant treated cotton fabrics were impregnated with a diluted solution of poly(dimethylsiloxane) (PDMS) for improving water repellent behavior. The morphology and chemical composition of un-treated and treated cotton fabrics were measured by scanning electron microscopy equipped with Energy Dispersive X-ray analysis. Thermogravimetric analysis indicated that the addition of melamine/PEI–PA coating induced earlier degradation of cotton fabrics to form char, and the presence of PDMS further improved the char yield. The flame retardant property was significantly enhanced as evidenced by the self-extinguishing behavior of Cotton-4BL and Cotton-4BL-PDMS fabrics in the vertical burning tests. The peak heat release rates of the treated cotton fabrics were decreased by more than 50% in contrast to that of the original cotton. The significant improvement in flame retardancy was attributed to the catalytic effect of the melamine/PEI–PA coating on char formation and the char stabilization effect of PDMS. The char layer with good thermal resistance played a crucial role in suppressing flame spread. The Cotton-4BL-PDMS fabrics also exhibited good water repellent behavior, which displayed an initial contact angle larger than 130° and almost unchanged over time.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2018
·
IF 3.779
Xiang Gao,Ru Yan,Lei Xu,Houyi Ma
Amorphous phytic acid nanoparticles were prepared via a condensation reaction of phytic acid with aminopropyltriethoxysilane. X-ray photoelectron spectroscopy and fourier transform infrared characterizations demonstrated that there were abundant phosphate groups on the surface of as-prepared phytic acid nanoparticles. The advanced composite phytic acid nanoparticles doped silane sol-gel coating was fabricated on the cold-rolled steel substrates using sol-gel technique and introducing phytic acid nanoparticles into the coating. The results of electrochemical tests showed that the doping of phytic acid nanoparticles greatly improved the anti-corrosion and durable performances of the silane coatings. The simple strategy which utilized the “active” nanoparticles to improve the corrosion mitigation and durable performances of coating is expected to find wide application in the anti-corrosion coating industry.
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高影响因子
JOURNAL OF POWER SOURCES
·
2018
·
IF 6.945
Xianbin Liu,Shuai Zou,Kaixi Liu,Chao Lv,Ziping Wu,Yanhong Yin,Tongxiang Liang,Zailai Xie
The fabrication of three-dimensional (3D) graphene-based macroscopic materials with superior mechanical and electrical properties for flexible energy storage devices is still extremely challenging. Here, we report a novel 3D graphene hydrogel decorated by the biomass phytic acid (PAGH) with developed porosity and strengthen mechanical property via hydrothermal and freeze-drying methods. The phytic acid molecules are intercalated into the graphene sheets , enabling robust network structure. This induces the formation of materials with larger specific surface area, lower density and enhanced compressive strength compared with pure GH. When directly employed as an electrode, the PAGH exhibits a high specific capacitance of 248.8 F g −1 at 1 A g −1 and excellent rate performance of 67.9% as current density increasing to 20 A g −1 . Furthermore, the all-solid-state supercapacitor based PAGH can deliver outstanding cycle life (86.2% after cycling 10,000 times), glorious energy density (26.5 Wh kg −1 ) and power density (5135.1 W kg −1 ). The prepared device shows stable electrochemical behaviors at random bending angles. Therefore, the present work will open a new avenue to design and fabricate new flexible and portable graphene-based electrodes for future applications in energy storage devices.
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高影响因子
APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Fan Yang,Xing He,Chunxia Wang,Yan Cao,Yun Li,Linan Yan,Mengmeng Liu,Mingzhu Lv,Yanan Yang,Xu Zhao,Yongfeng Li
Eco-friendly phosphorus-doped carbon quantum dots (P-CQDs) have been successfully synthesized by facial hydrothermal treatment of phytic acid (PA) and sodium citrate. PA is selected because of its hexatomic ring structure with firm C-P bonds, abundant phosphate group and completely natural. In this case, the phosphorus content of the as synthesized P-CQDs achieves 8.52 wt.%. The P-CQDs show a narrow size distribution in the range of 2.5–4.5 nm and exhibit excellent sensitivity to Cu 2+ with an ultra-low detection limit of 1 nM. Furthermore, the P-CQDs have been applied in water sample to detect Cu 2+ , and the results are highly consistent with the data measured by inductively coupled plasma optical emission spectrometry. Therefore, the as synthesized P-CQDs display a great potential for applications in the area of Cu 2+ ion detection.
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2018
·
IF 6.14
Kai Liu,Xiaofeng Pan,Lihui Chen,Liulian Huang,Yonghao Ni,Jin Liu,Shilin Cao,Hongping Wang
Recently, integration of two or more important properties into a hydrogel has been a challenge in the preparation of the multifunctional hydrogel. Herein, in order to impart conductive and magnetic properties to the self-healing PVA hydrogel at the same time, the nanofibrillated cellulose (NFC) was used as the substrate. The polyaniline was coated on the NFC surface by in situ chemical polymerization, and the MnFe2O4 nanoparticles were synthesized and loaded on the NFC by the chemical co-precipitation method. The multifunctional PVA hydrogel was prepared by incorporating the NFC/PAni/MnFe2O4 nanocomposites with the PVA hydrogel. The magnetic and conductive property tests of the multifunctional PVA hydrogel showed that the maximum saturation magnetization and conductivity were 5.22 emu·g–1 and 8.15 × 10–3 S·cm–1, respectively. Moreover, the multifunctional PVA hydrogel exhibited excellent self-healing and ultrasoft properties, which could be self-healed completely after the pieces of the hydrogel were put together for several minutes at room temperature. Due to the self-healing ability, conductivity, and magnetism, the novel hydrogel was expected to be used in many practical applications, such as electrochemical display devices, rechargeable batteries, and electromagnetic interference shielding. More importantly, we proved a facile template approach to the preparation of a stable polymer and nanoparticle composites using NFC as substrates that imparted different properties to hydrogels.
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高影响因子
DESALINATION
·
2018
·
IF 6.603
Jiaqi Huang,Shu Xiong,Qingwu Long,Liang Shen,Yan Wang
Proper draw solution is a crucial factor to generate a high performance in FO process. In this study, a phytic acid and its salt (PA-Na) were evaluated as novel draw solutes in FO process. The effects of the solution pH and concentration on the physicochemical properties were investigated systematically. Using 0.45 M PA-Na draw solution (pH = 7) and DI water feed solution, a relative high water flux of 19.02 LMH and a low solute flux of 0.51 gMH can be obtained, with HTI-TFC membrane in the PRO mode. An even better performance of a 30.35 LMH water flux and a 0.61 gMH solute flux can be achieved using the self-made HPAN-TFC membrane. The comparison of PA-Na and NaCl draw solutions shows that PA-Na draw solution has a much lower draw solute leakage and a competitive water flux. In addition, the application of PA-Na draw solution for the brackish water desalination was explored. The diluted PA-Na draw solution after FO may be used directly in food production by further dilution. In general, the non-toxicity and satisfactory FO performance of this food additive demonstrate its great potential as a draw solute for FO applications.
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高影响因子
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