Journal of Materials Chemistry A
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2024
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IF 10.7
Jingya Liu,Xin Xu,Hongkang Wang,Peng-Fei Wang,Kai Wu,Yonghong Cheng,Bing Xiao
The ammonization treatment is applied to a prototype ordered double-transition metal MXene known as Mo2TiC2Tx at different annealing temperatures (400, 500 and 600 °C) and durations (1 h and 2 h). The lattice structures, micro-morphologies, and chemical compositions of the resulting ammoniated MXenes are characterized by XRD, SEM, TEM, XPS and EPMA. All ammoniated MXenes preserve the layered microstructure of the parent carbide 2D material, and N atoms are successfully doped into the lattice sites to form carbonitride MXenes, denoted as Mo2Ti(C1−δNδ)2Tx. The Hall measurements are carried out to evaluate the electrical conductivity of ammoniated MXenes and raw Mo2TiC2Tx, and the results indicate that the carbonitride forms exhibit higher electrical conductivities and electron concentrations than the raw 2D material. The electrochemical properties of ammoniated MXenes are investigated by means of charge–discharge cycling CV tests, the GITT and EIS measurements at various scan rates. The ammoniated MXene sample (N400-1h) could deliver a storage capacity of 750 mA h g−1 (200 mA h g−1) at a current density of 0.03 A g−1 (2 A g−1). It is found that the capacitive charge storage mechanism through the intercalation reaction process dominates the total capacity for the ammoniated MXenes. The diffusion dynamics of Li+ in all investigated MXene electrodes show a two-stage lithiation mechanism in which the apparent diffusion coefficient is regulated by the different numbers of vacancies in the absorbate layers at various lithiation stages in the GITT curves. Overall, ammoniated MXenes also show superior performances in Li+ diffusion dynamics and charge transfer kinetics at the electrode–electrolyte interface to those of raw Mo2TiC2Tx, elucidating a new avenue for the use of ammoniated double-transition metal o-MXenes as high-performance electrode materials for LIBs and supercapacitors in the future.
研究领域:
材料科学
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电化学
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能量存储
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2021
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IF 8.742
Fang-Fang Chen,Ting Su,Xue-Ting Zhao,Jie-Feng Pan,Li-Fen Liu
Polyamide thin-film composite reverse osmosis (RO) membranes usually suffer from fouling problem, which greatly limits the wide application of RO technology. In this study, a novel rigid-flexible interpenetrating polyamide RO membrane was fabricated via two step modifications to alleviate the membrane fouling during the RO process. The first step modification was carried out by incorporation a new aliphatic diamine of 1,3-diamino-2-propanol (DAPL) into the aromatic m-phenylenediamine (MPD) aqueous solution to react with trimesoyl chloride (TMC) to form a rigid-flexible interpenetration polyamide (PA) separation layer for enhancing its permeability. Then, the second modification was performed by grafting PVA on the top surface of the DAPL-based PA layer to tailor more hydrophilic, smoother and less negatively charged surface and endowed the modified membrane favorable antifouling property. Under the optimized condition, the permeability flux of the modified RO membrane reached 58.6 L/m 2 h with an about 58.8% increase than the pristine RO membrane (about 36.9 L/m 2 h), and the salt rejection was also maintained about 99.6% without any loss. At the same time, the modified RO membrane presented a favorable resistance to the dye foulants of methylene blue (MB) and crystal violet (CV) with flux recovery rate of 76.8% and 84.2% respectively. This study provides a facile and effective way to fabricate a novel antifouling reverse osmosis composite membrane with favorable comprehensive separation performance.
研究领域:
材料科学
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化学工程
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环境工程
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DOI
高影响因子
ELECTROANALYSIS
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2020
·Vol. 32
·期 8
·1772-1779
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IF 2.544
Yifei Yang,Yue Sun,Mingzhu Jin,Ru Bai,Yutong Liu,Yingqi Wu,Wei Wang,Xuewei Feng,Siyu Li
Superoxide dismutase (SOD) plays an important role in nearly all living cells. In this study, SOD imprinted poly(ionic liquid)s (SIPILs) were prepared on the surface of the bare Au electrode modified with nano-palladium and nano-gold (Au/nPd/nAu/SIPILs). SIPILs was synthesized with 1-vinyl-3-propyl imidazole sulfonate ionic liquids as functional monomers via electrochemically mediated atom transfer radical polymerization (eATRP) catalyzed by SOD. The Au/nPd/nAu/SIPILs was examined by cyclic voltammetry (CV), scanning electron microscope (SEM), energy-dispersive spectrometer (EDS) and X-ray photoelectron spectroscopy (XPS). The Au/nPd/nAu/SIPILs was also used as an electrochemical sensor to determine SOD by differential pulse voltammetry (DPV). Under the optimal conditions, the detection range of SOD was from 1.0×10 −8 to 1.0×10 2 mg L −1 with a limit of detection of 8.90×10 −9 mg L −1 (S/N=3). Compared with other methods, the sensor based on SIPILs had the broader linear range and lower detection limit.
研究领域:
分析化学
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材料科学
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电化学
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生物传感器
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产品关联
DOI
高影响因子
Energy Technology
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2020
·Vol. 8
·期 6
·2000189
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IF 3.404
Zhengwei Yang,Huifeng Wang,Boshi Cheng,Chuang Yue,Gaozhan Liu,Runtian Zheng,Fang Hu,Jie Shu
Micronano porous Mo 2 C@C nanorods (NRs) composite anodes are successfully synthesized using the raw materials of MoO 3 NRs, polyacrylonitrile (PAN) polymer, and inactive sodium chloride (NaCl) microparticles. The abundant and soluble NaCl microparticles act as the sacrificial templates, which increase the surface contact area between the MoO 3 NRs and the PAN polymer, thus promoting the thorough formation of Mo 2 C electrodes during the carbonization process. The optimized Mo 2 C@C-template (MCC-T) NR composite electrodes deliver an enhanced electrochemical performance, which is ascribed to the enlarged surface area, reduced path distance of lithium ions, and structural stability. In addition, the Li-ion storage mechanism and the electrochemical kinetics of Mo 2 C@C NR composite anodes are also systemically and experimentally investigated by ex situ X-ray diffraction (XRD) and cyclic voltammetry (CV) techniques. This synthetic strategy for MCC-T NR composite anodes is helpful to design other nanostructured carbide anodes for high-performance lithium-ion batteries (LIBs).
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2021
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IF 7.312
Shengnan Li,Jiwei Jiang,Shih-Hsin Ho,Fengxiang Li,Wenlu Zeng
Microbial fuel cells (MFCs) systems are up-and-coming technologies for renewable energy production and wastewater treatment simultaneously. However, the inactive oxygen reduction reaction (ORR) on the cathode markedly limits the functioning of MFCs. Therefore, the cathodic catalyst is one of the crucial components in MFCs, this paper presents the removal of the antibiotic sulfamethoxazole (SMX) from water using single-chamber MFCs with Fe-Co-C/N as electrocatalysis. Scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS) were conducted to illustrate the structure and elemental composition of Fe-Co-C/N. The results obtained by the rotating disk electrode (RDE) method showed an extraordinary electrocatalytic activity of Fe-Co-C/N towards ORR in O 2 -saturated 0.1 M KOH. Furthermore, the degradation of SMX by MFCs that applied modified electrodes was also studied. The results demonstrated that using Fe-Co-C/N as air–cathode catalysts exhibited the degradation efficiency of 61.64% towards 6 mg/L SMX with 48 h. In addition, cyclic voltammetry (CV) analysis showed that the peak current of the biofilm in the PBS solution (without adding SMX) was significantly higher than that of the solution with SMX addition at 6, 18, and 30 mg/L. Moreover, MFC performance was also evaluated by measuring electrochemical impedance spectroscopy (EIS), power generation, and polarization curves. Last but not least, the high-throughput sequencing-based metagenomic technique was used to explore the microbial community diversity, functional genes in MFCs, and fate of ARGs. SMX addition raised the abundances of sul1 and sul2 as resistance genes, which enhanced microbial resistance, the coping capability of SMX toxicity, and the adjustment of the damage from SMX. The obtained results suggest that Fe-Co-C/N is a feasible catalyst for MFC cathodes owing to its satisfactory performance in terms of SMX wastewater treatment and power production.
研究领域:
环境科学
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电化学
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废水处理
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微生物学
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催化
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2019
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IF 6.393
Xiaoqing Zhao,Jing Wang,Hou Chen,Hui Xu,Liangjiu Bai,Wenxiang Wang,Huawei Yang,Donglei Wei,Baiqing Yuan
A novel electrochemical immunoassay platform for multi-signal amplification has been constructed and applied to the simultaneous detection of three tumor markers (TMs). The platform was successfully developed by polyethyleneimine (PEI)-polydopamine (PDA)/reduced graphene oxide (rGO) nanocomposites. PDA/rGO as the substrates can simultaneously load with detection antibodies (Ab 2 ) and large amounts of PEI, which PEI were further used to immobilize different signal labels. Three TMs of carcinoembryonic antigen (CEA), prostate specific antigen (PSA) and alpha fetoprotein (AFP) were employed as potential factors. Ferrocenecarboxylic acid (Fc), anthraquinone-2-carboxylic acid (Aq) and acetylsalicylic acid (ASA) were employed as distinguishable signal labels. Electrochemical responses of designed sandwich-type immunosensor were successfully investigated by cyclic voltammetry (CV) and differential pulse voltammetry (DPV). The multiplexed immunoassay displayed excellent linear response in the range of 0.102 pg/mL–112 ng/mL for CEA and PSA, 0.117 pg/mL–117 ng/mL for AFP. The detection limit of three TMs were 91 fg/mL, 101 fg/mL and 83 fg/mL for CEA, PSA and AFP, respectively. Moreover, this electrochemical immunoassay platform exhibited excellent reproducibility, sensitivity and selectivity for the simultaneous detection of multiple biomarkers.
研究领域:
生物医学工程
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分析化学
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纳米技术
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电化学
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生物传感器
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2023
·
IF 8.2
Airong Xu,Yiming Gong,Qingqing Sun,Liuzemu Li,Fen Wang,Zhihong Xiao,Rukuan Liu
GO/HEC/PGDE/Fe 3 O 4 materials were successfully fabricated using environmentally-friendly hydroxyethyl cellulose (HEC), poly(ethylene glycol) diglycidyl ether (PGDE), graphene oxide (GO) and magnetic Fe 3 O 4 . Systematic investigations were completed to explore the influences of GO content in GO/HEC/PGDE/Fe 3 O 4 and adsorption conditions on the adsorptions of cationic dyes (methylene blue (MB), crystal violet (CV)) and anionic dye acid blue 25 (AB-25). The increase of GO content can remarkably improve the adsorption capacity of GO/HEC/PGDE/Fe 3 O 4 for the dyes. The three kinetic, four isothermic and three thermodynamic models were investigated to reveal the adsorption behaviors of the dyes. The formation of HEC/PGDE/Fe 3 O 4 and adsorption mechanisms of the dyes by GO/HEC/PGDE/Fe 3 O 4 were suggested. The GO/HEC/PGDE/Fe 3 O 4 endowed with easy-fabrication, eco-friendly feature, efficient adsorption capacity of anionic/cationic dyes, convenient separation and reusability has potential applications in wastewater purification industry.
研究领域:
环境科学
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材料科学
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化学工程
·
水处理
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2021
·
IF 8.067
Yue Tian,Qingqiang Cui,Linlin Xu,Anxin Jiao,Shuang Li,Xuelin Wang,Ming Chen
The unique hot carrier-driven direct plasmonic photocatalysis of coinage metal nanomaterials (NMs) via energetic localized surface plasmon resonance (LSPR) in visible-light region has been explored in recent years. However, the low photoinduced electron transfer efficiency and insufficient separation of electron-hole pairs would severely preclude their widespread practical applications. Herein, we demonstrate an interesting plasmonic photocatalyst based on the construction of icosahedral (Ih) Au@C 60 core-shell NMs, taking advantage of specific delocalized π electrons structure of a tight C 60 shell and enhanced LSPR property of Ih Au core. Then, the pronounced interfacial interaction at junction region endows the obtained Au@C 60 NMs with an outstanding photoinduced hot carrier-transmission during photocatalytic reaction, facilitating a remarkably higher (1.89 times) photocatalytic activity toward visible-light driven degradation of crystal violet (CV) dyes, as compared to bare Au NMs. Impressively, the photocatalytic activity of Ih Au@C 60 NMs can be effectively optimized by changing the pH value of reaction solution, with the kinetic rate constant reaching the maximum value of 0.179 min −1 in pH 0 11.4 solution, while 0.005 min −1 at pH 0 3.0. Moreover, due to the protection of a tight C 60 shell, the Ih Au@C 60 NMs also possess excellent photocatalytic stability/reusability in recycling runs, holding great potential for the design of robust and high-performance plasmonic photocatalysts in repeated practical applications.
研究领域:
材料科学
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纳米技术
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光催化
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等离子体学
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DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
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2020
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IF 2.726
E. Loni,M.H. Siadati,A. Shokuhfar,D. Leybo,D. Kuznetsov
Water splitting, an assuring concept for future sustainable hydrogen/oxygen production, is intensely dependent on the efficiency of catalysts to promote the oxygen evolution reaction (OER) or hydrogen evolution reaction (HER). In this regard, finding high-performance electrocatalysts for OER remains amongst the key challenges in water splitting. Here, for the first time, an aerosol-assisted spray pyrolysis method was applied to synthesize hollow spherical powder possessing nano-thick walls of sodium-cobalt pyrophosphate (Na 2 CoP 2 O 7 ) electrocatalyst for OER application. X-ray diffraction (XRD) patterns, X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDS) analyses were carried out for investigating the structure, composition , and morphology of the electrocatalyst powder. The electrocatalytic performances of the as-synthesized Na 2 CoP 2 O 7 powder along with its composites with Vulcan XC-72 (conductive carbon black), reduced graphene oxide (rGO) and N-doped rGO (N-rGO) were studied by the linear sweep and cyclic voltammetry (LSV and CV). The best sample synthesized was Na 2 CoP 2 O 7 /rGO (50/50 wt%), which required only 240 mV overpotential to produce a current density of 10 mA cm −2 .
研究领域:
材料科学
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电化学
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催化
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可再生能源
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）