JOURNAL OF MATERIALS SCIENCE
·
2020
·Vol. 55
·期 35
·16625-16640
·
IF 3.553
Zhang Zewu,Zhou Jiamin,Wei Hanlin,Dai Yifan,Li Shijia,Shi Haojun,Xu Gang
Abstract Efficient design and preparation of cost-effective and binder-free bifunctional electrocatalysts to accelerate the hydrogen and oxygen evolution reaction (HER and OER) are critical for overall water splitting. In this work, 3D hierarchical NiFe-LDH/FeCoS 2 /CFC electrodes were synthesized for the first time. The carboxyl groups derived from acid treating promote the homogeneously coated FeCoS 2 on CFC, giving rise to the strongly coupled FeCoS 2 /CFC hybrid. The NiFe-LDH exhibited the vertical growth feature on the FeCoS 2 /CFC composite, which can efficiently expose the active edges sites. Due to unique structure and synergistic effect between the components, the NiFe-LDH/FeCoS 2 /CFC exhibits significant electrocatalytic activity and stability under alkaline environments, with overpotentials of 190 and 308 mV to achieve 10 mA cm −2 for OER and HER, respectively, providing it as a promising electrocatalyst for water splitting reaction. In addition, we deeply studied the synergistic catalytic mechanism of NiFe-LDH/FeCoS 2 /CFC, explaining the reasons leading to the improved catalytic performance of HER and OER. Graphic abstract
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2025
·
IF 6
Yuanyuan Liu,Li Dong,Feiyao Qing,Qingmin Ji,Hengdao Quan
The development and synthesis of novel environmentally-friendly chlorofluorocarbon alternatives are in accordance with the global sustainability paradigm and represent a progressive response to contemporary technological demands. 2,3-dichloro-1,1,1,4,4,4-hexafluoro-2-butene (CFC-1316mxx) holds significant research value as a synthetic intermediate for the novel environmentally-friendly chlorofluorocarbon alternative 1,1,1,4,4,4-hexafluoro-2-butene (HFO-1336mzz). This study developed a Ru/BaF 2 catalyst based on BaF 2 as the support for the hydrogenation coupling of 1,1,1-trifluorotrichloroethane (CFC-113a) to synthesize CFC-1316mxx. The physical/chemical properties of Ru/BaF 2 before and after reaction were analyzed by methods of XRD, BET, SEM, TEM, XPS, TG, H 2 -TPR, and NH 3 -TPD, and its catalytic performance in the reaction was also evaluated. Ru/BaF 2 features suitable acidity, adequate reducibility, appropriate specific surface area and pore structure, and exceptional thermal stability. Moreover, Ru/BaF 2 exhibits excellent catalytic activity, selectivity and stability, with a CFC-113a conversion rate of 93.81 % and a CFC-1316mxx selectivity of up to 96.04 %. As BaF 2 may also act as a “chlorine absorber” to inhibit catalyst deactivation, the conversion rate can remain at 71.00 % with a high selectivity of 95.21 % after 100 h of use. Based on the structural analysis of catalysts and the distribution of products, the reaction mechanism was also speculated.
研究领域:
催化化学
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环境化学
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材料科学
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可持续化学
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含氟化学品合成
✓ 已验证
产品关联
DOI
高影响因子
Engineering Research Express
·
2024
·Vol. 6
·期 2
·025015
·
IF 1.5
Wenlong Deng,Linyu Mei,Yue Niu,Zicheng Zhang,Yunpeng Shao
Metal–organic framework (MOF) materials have been increasingly used owing to their high porosity, chemical stability, and semiconducting properties. With the help of MOF materials, MOF-based SERS substrates can exhibit high sensitivity. Herein, we proposed a flower-like Ag nanoparticles (AgNFs)/metal–organic framework (MOF)/ carbon fiber cloth (CFC) substrate-based surface-enhanced Raman scattering (SERS) sensor for the high-sensitive detection of dye molecules. MOF is used as a signal amplifier to accelerate the approach of dye molecules near AgNFs on the MOF surface and anchor AgNFs on the substrate surface. The detection occurred on the AgNFs/MOF/CFC SERS substrate, providing an enhancement factor (EF) of 5.53 × 107. Benefitting from the signal amplification function of AgNFs/MOF/CFC and the superiority of SERS, this sensor represented high sensitivity performance and a wide detection range. Importantly, the combination of Co elements with silver in the AgNFs/MOF/CFC composite substrate enhances the resistance of Ag to oxidation by atmospheric moisture resulting in excellent stability (the substrate maintained good SERS activity after 45 days of exposure to air) of the SERS substrate. The basic performance of the substrate was evaluated using rhodamine 6 G (R6G). (Detection limit reached 10−12 M) The detection limit of TC was 0.1 ppm. This method provides a potential and cost-effective strategy to develop advanced SERS sensing devices to effectively monitor pollutants in environmental waters.
研究领域:
材料科学
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环境科学
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
MethodsX
·
2019
·
IF 0
Chengyuan Liu,Zhiwei Liu,Hongkun Niu,Cong Wang,Zhaowen Wang,Bingliang Gao,Jingjing Liu,Mark Taylor
We provide a method for preparation of binder-free cathode for rechargeable aluminum-ion batteries (AIBs). Ultrasonicated natural graphite (u-NG) flakes in N-methylpyrrolidone (NMP) is drop-casted to a carbon fiber cloth (CFC) to obtain binder-free u-GF@CFC cathode for AIBs. We also provide an in-situ Raman spectral technology and the corresponding in-situ Raman cell to determine the mechanism of intercalation/deintercalation reactions of the chloroaluminate ions at cathode of AIBs. The in-situ Raman spectra are recorded using a Raman spectrometer combined with a potentiostat/galvanostat model electrochemical workstation. • A simple preparation method of a binder-free u-GF@CFC cathode is suggested. • The u-GF@CFC cathode is obtained by drop-casting ultrasonicated graphite flakes on the surface and internal gaps of the carbon fiber cloth. • The method includes the in-situ Raman spectral technology and the corresponding in-situ Raman cell.
研究领域:
电化学
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能源材料
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纳米材料
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电池技术
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原位表征
✓ 已验证
DOI
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2021
·
IF 19.503
Lin Xu,Lifen Liu
In this study, the catalytic performance of helical-form carbon fiber cloth anode loaded with atomic Fe@MoS 2 (Fe@MoS 2 /CFC (h)) in piezocatalytic fuel cell (Pz-FC), improved 1.27 times with aeration as the piezo-driving force. The above Pz-FC with 0.5 mM peroxymonosulfate (PMS) and Xe-lamp irradiation forming a PMS-piezo-photocatalytic fuel cell (PMS-Pz-PFC) system, removed 92.8% berberine in 60 min and generated power density that were respectively 2.04-fold and 8-fold higher than the PMS-Pz-PFC using MoS 2 /CFC (h) as the anode. Experiments showed that atomic Fe promoted piezo-photocatalysis of the helical-design anode significantly to accelerate the activation of PMS. Moreover, with 0.5 mM PMS, remarkable enhancement of electricity generation (more than 500 times difference) and pollutant degradation (by 40–50%) were achieved. The drastic synergy of piezoelectric catalysis in enhanced advanced oxidation has great practical application potential.
研究领域:
环境科学
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材料科学
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能源工程
✓ 已验证
DOI
高影响因子
ACS Applied Energy Materials
·
2019
·
IF 0
Sumin Wang,Jingwen Shen,Qiguan Wang,Yaru Fan,Lu Li,Kai Zhang,Lei Yang,Wenzhi Zhang,Xinhai Wang
We constructed a flexible solid-state supercapacitor based on carbon fiber cloth on which a graphene quantum dot-reduced graphene oxide solution and an aqueous polyaniline solution are alternatively sprayed. An acidic gel is used as both the electrolyte and the binder, by which two plates of electrodes are glued together, forming a symmetrical capacitor. The graphene quantum dot-reduced graphene oxide modifies the hydrophobic nature of carbon fiber cloth, which enhances the interactions between carbon fiber cloth and polyaniline. Additionally, under the strong electrostatic forces between the electropositive polyaniline and the electronegative graphene quantum dot-reduced graphene oxide, a self-assembled three-dimensional fiber-like network on carbon fiber cloth is observed. The fabricated solid-state supercapacitor shows a maximum capacitance of 82.9 mF cm–2 (1036 F g–1) at a 0.1 mA cm–2 current density referenced to the active materials on the electrodes, with a high stability of 97.7% retention after 10000 charge and discharge cycles, because of the strong interaction between polyaniline and the modified carbon fiber cloth. Moreover, the capacitance is unchanged upon bending. This facile layer-by-layer self-assembly spraying technique shows great advantages of easy operation, good controllability, and versatility and can be used universally for the fabrication of foldable and wearable photoelectric devices.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
DOI
COMPOSITES PART B-ENGINEERING
·
2025
·
IF 14.2
Yuze Zhou,Guang Yang,Yumeng Wang,Jiaying Lei,Tengling Ye,Ruipeng Huang,Shaohao Zhan,Dongyan Tang
To address oily wastewater pollution, a dual-responsive composite membrane with switchable superwettability was fabricated by in situ growth of MnO 2 microflowers on carbon fiber cloth (CFC), followed by coordination-driven self-assembly of catechol-functionalized poly(N-isopropylacrylamide) (PNIPAM). The abundant oxygen vacancies (O v ) on MnO 2 microflowers enhanced photothermal conversion efficiency (24.99% for optimal MC 4 ) and provided active sites for robust PNIPAM anchoring via C-O-Mn coordination bonds. The resulting membrane (PMC) exhibited switchable superwettability: underwater superoleophobicity (150.10°) at 25 o C and underoil superhydrophobicity (150.27°) at 45 o C under heating or NIR irradiation. This enabled efficient separation of diverse oily pollutants, including light/heavy oil-water mixtures and emulsions, with high separation efficiency (> 99.5% for mixtures, > 99.2% for emulsions) and exceptional water flux (25239.89 L m −2 h −1 ). Taking advantages of the in situ grown of MnO 2 on CFC and strong chemical anchoring of PNIPAM on MnO 2 , the photo and thermal dual-responsive PMC membrane maintained excellent stability after mechanical (rubbing, bending, soaking) and chemical (acid/alkaline/saline) challenges, demonstrating superior reusability and durability for practical water purification applications.
研究领域:
材料科学
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化学工程
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环境科学
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纳米技术
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高分子科学
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表面工程
✓ 已验证
产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 6
·1-12
·
IF 5.3
Xue Jinyan,Jia Yuzhen,Qi Linying,Yang Huaixia,Wang Yanzhi,Guo Liang
A novel aptamer-based sensor was developed using the signal amplification strategy of ring-opening metathesis polymerization (ROMP) and polyethyleneimine modified graphene oxide to achieve trace detection of carbendazim (CBZ). The dual identification of aptamer and antibody was used to avoid false positive results and improve the selectivity. Polyethyleneimine modified graphene oxide (GO-PEI), as a substrate material with excellent conductivity, was modified on the surface of a glassy carbon electrode (GCE) to increase the grafting amount of aptamer on the electrode surface. Moreover, a large number of cyclopentenyl ferrocene (CFc) was aggregated to form long polymer chains through ring-opening metathesis polymerization (ROMP), so as to significantly improve the detection sensitivity of the biosensor. The linear range of this sensor was 1 pg/mL–100 ng/mL with a detection limit as low as 7.80 fg/mL. The sensor exhibited excellent reproducibility and stability, and also achieved satisfactory results in actual sample detection. The design principle of such a sensor could provide innovative ideas for sensors in the detection of other types of targets. Graphical abstract
研究领域:
分析化学
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电化学
·
生物传感器
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环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）