JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2015
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IF 2.729
Shuang Ren,Huan Wang,Hongyi Zhang,Liqing Yu,Mingjie Li,Meng Li
Novel mesoporous carbon fibers (MCFs) were fabricated through a self-templating strategy and solution growth process. MCF modified glassy carbon electrode (MCF/GCE) was proposed for the direct electrocatalytic and simultaneous determination of four DNA bases (guanine (G), adenine (A), thymine (T) and cytosine (C)) using differential pulse voltammetry (DPV) measurement. The MCF/GCE exhibits satisfactory electrocatalytic activity by significantly enhancing the oxidation peak currents and lowering the oxidation potentials toward the four bases when compared with those on GCE. Especially, MCF greatly accelerates the electron transfer of pyrimidine base, which have high oxidation potentials and slow electron transfer kinetics. Moreover, MCF/GCE realizes the simultaneous determination of four DNA bases with low detection limits, high sensitivity and wide linear range. More important, the proposed electrode was successfully applied in the direct detection of bases in herring sperm DNA sample with satisfactory results. Besides, the MCF/GCE shows good long-term stability and reproducibility. These superior performances of MCF/GCE toward purine and pyrimidine DNA bases provide a good possibility for applying the MCF/GCE in our further DNA biosensor research.
研究领域:
生物化学
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分析化学
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Rongli Fang,Le Zhang,Shunjiang Huang,Ying Jin,Kaiwen Guo,Bingying Li,Yue Wang
Electrochemical treatment of saline or brackish water by capacitive deionization (CDI) is a novel resource-saving solution to ensure the availability of freshwater resources in the environment. MOF (metal–organic framework) derived carbon as a novel carbonaceous material in CDI has received considerable research attention. Among them, ZIF-L-derived carbon (ZC) suffers from problems such as self-aggregation, poor mesoporous structure, and low electrical conductivity, which lead to poor CDI performance. In this paper, a strategy of ZIF-L coated with polydopamine (PDA) is proposed to solve the above problems. When the amount of PDA was 0.5 g, ZIF-L@PDA 0.5 -derived carbon composite (ZPC 0.5 ) is obtained for efficient capacitive deionization. The ZPC 0.5 composite not only maintains the 2D leaf shaped structure consistent with ZIF-L, exposing more active sites, but also has an elevated mesopore occupancy ratio to promote solution diffusion. Meanwhile, the interaction between PDA and ZIF-L makes the ZPC 0.5 have a cavity structure, which improves the mass transfer capacity. The resulting ZPC 0.5 composite has a specific capacitance (165.8 F g −1 ) that is 3.86 times higher than that of ZC (42.9 F g −1 ). Consequently, in 1.2 V, 500 mg/L NaCl solution, the symmetric CDI cell ZPC 0.5 //ZPC 0.5 exhibits an excellent desalination capacity (29.6 mg/g), which is 2.69 times that of the ZC//ZC.
研究领域:
材料科学
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环境工程
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产品关联
DOI
高影响因子
MRS Communications
·
2021
·Vol. 11
·期 4
·418-424
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IF 2.566
Liu Heguang,Jing Ruixuan,Wang Zilu,You Caiyin
Abstract FeS 2 is thought to be a kind of promising anode materials used for lithium-ion batteries (LIBs), but the intrinsic low electrical conductivity and remarkable volume change hinder its practical application. In the present work, we proposed a strategy by introducing mesoporous carbon (MPC) to obtain a FeS 2 /MPC composite electrode for LIBs. The FeS 2 /MPC composite was prepared by hydrothermal method. The results indicated that the FeS 2 /MPC composite electrode exhibited better electrochemical performance than pristine FeS 2 . Especially, the discharge capacity of composite electrode reached 650 mAh g −1 at 0.5 C current density, and this was significantly higher than that of pristine FeS 2 . Graphic abstract
研究领域:
材料科学
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能源存储
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产品关联
DOI
高影响因子
CATALYSIS LETTERS
·
2020
·Vol. 150
·期 8
·2294-2303
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IF 2.482
Zhang Gang,Chen Tong,Zhang Yi,Liu Tao,Wang Gongying
Abstract The selective conversion of cellulose to sorbitol is a promising route to valorize biomass. A binary catalyst ZrP-Ru/MC was constructed by mesoporous carbon supported ruthenium (Ru/MC) combined with zirconium phosphate (ZrP). It was found that ZrP-Ru/MC was an excellent catalyst for the conversion of cellulose with high sorbitol yield. Under the optimal reaction condition, a high sorbitol yield of 66.4% was obtained in just 1.5 h if cellulose was mix-milled together with ZrP. The characterizations results indicated that the high dispersion of Ru and macroporous–mesoporous structure were the key factor to determine the excellent catalytic activity of Ru/MC. In addition, the Ru TOF of 220 h −1 in the Ru/MC was much higher than that of commercial ruthenium carbon, indicating the high Ru utilization in Ru/MC. Graphic Abstract
研究领域:
化学工程
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催化科学
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生物质转化
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产品关联
DOI
高影响因子
LANGMUIR
·
2018
·
IF 3.789
Lili Zhang,Lei Liu,Xiaolin Hu,Yifeng Yu,Haijun Lv,Aibing Chen
Composite carbon materials with multiple morphologies (such as spheres/sheets and spheres/tubes) that combine the merits of both structures have a wide range of applications in electrochemistry, catalysis, energy storage, and so on. Therefore, the development of an efficient and simple method for preparing carbonaceous composite materials is a research hot spot. On the basis of the inhomogeneity of 3-aminophenol/formaldehyde (3-AF) polymerization spheres, the hollow 3-AF spheres were obtained after the dissolution of the internal 3-AF oligomer. The dispersed 3-AF oligomer was reassembled with silicate oligomers on the hard template of Mg(OH)2 sheets and hollow 3-AF spheres linked by CTAB through electrostatic force. The obtained N-MCS/HCS possessed both sheet and sphere structure, with a high specific surface area and uniform mesoporous distribution. As an electrode material, N-MCS/HCS exhibited a good specific capacity (270 F g–1 at the current density of 1 A g–1) and outstanding cycling life stability (96.3% after 5000 cycles) at a current density of 5 A g–1 and could be used as a new electrode material.
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
PubMed
高影响因子
CHEMISTRY OF MATERIALS
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2023
·
IF 8.6
Wenquan Wang,Xiaohui Deng,Zhengbin Tian,De-Chang Li,Guang-Hui Wang
Although the synergy between single atom sites (SAs) and nanoparticles (NPs) can enhance the oxygen reduction performance, current synthetic strategies are not able to precisely control the distribution of SAs/NPs or the size of NPs under high metal loading, undesirably limiting the overall performance. Herein, we report that the pyrolysis of nanosized zeolitic imidazolate frameworks (ZIF-67) that are preconfined in the pores of mesoporous carbon (MC) can produce Co SAs and NPs (mean size of 4.3 nm at 15 wt % loadings) in close proximity to each other. As the movement of finely dispersed ZIF-67 is restricted by the pore-confinement configuration, the pyrolysis of spatially isolated ZIF-67 units can produce abundant Co–N4 sites distributed in the first or second graphitic shell encapsulating the NPs. Benefitting from the high density of active sites, the maximized synergetic interaction of SAs/NPs, and the rich mesoporosity of MC, Co-SAs/NPs@MC exhibits a half-wave potential (E1/2) of 0.91 V and excellent durability under alkaline conditions, outperforming commercial Pt/C and most reported counterparts. Control experiments combined with density functional theory calculations evidence that the presence of Co NPs is essential to optimize the adsorption of intermediates on the intimately coupled, catalytically active Co–N4 sites toward ORR. Moreover, it is revealed that the distance between Co SAs and NPs is critical for superior activity. As controlled fabrication of SA/NP hybrid catalysts is desired, the pore-confinement methodology reported herein and the advantages demonstrated by ORR are expected to guide the design of other functional catalysts.
研究领域:
材料科学
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催化化学
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产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
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2023
·Vol. 30
·期 21
·60704-60716
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IF 5.8
Zhang Nizi,Tang Chenliu,Bi Weixia,Sun Zhirong,Hu Xiang
Efficient removal of antibiotics from the aquatic environment is urgently needed due to their obstinate accumulation and non-biodegradability. In this study, a mesoporous carbon material (ZC-0.5) was successfully synthesized for the adsorption of sulfamethoxazole (SMX), one of the major antibiotics for the treatment of human and animal infections. ZIF-8 as the precursor of ZC-0.5, specifically, using cetyl trimethyl ammonium bromide (CTAB) and sodium laurate (SL) as dual templates and carbonizing at 800 ℃. This novel adsorbent exhibited a high proportion of mesopore (75.64%) and a large specific surface area (1459.73 m 2 ·g −1 ). The adsorption experiment examined the reusability of ZC-0.5 and that it could retain superior maximum adsorption capacities (167.45 mg∙L −1 ) after five cycles of adsorption and desorption. The adsorption process satisfied the pseudo-second-order kinetic (PSO) and mixed first- and second-order kinetic (MOE). It also satisfied the Freundlich and Sips isotherm models. Moreover, thermodynamic calculation indicated the adsorption process was spontaneous, endothermal, and entropy-increasing. Furthermore, plausible adsorption mechanisms were explained through van der Waals force, electrostatic interaction, hydrophobic force, π-π interaction, and hydrogen bond. This work offers a new efficient adsorbent for antibiotic elimination.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Chuanyi Chen,Congwei Wang,Haozhi Zhao,Quanlong Wang,Longyu Wang,Rongyu Li,Yongyong Yu,Yuede Pan,Gang Li
Although silicon (Si) is widely recognized as one of the most promising anode materials for next-generation lithium-ion batteries (LIBs), its severe volume expansion and poor electrical conductivity pose significant challenges for commercialization. To address these challenges, a mesoporous carbon shell encapsulated silicon/graphite composite (Si/G@PCS) with distinctive two-dimensional conductive network and self-adaptive internal spacing was deliberately designed in this work. Silicon nanoparticles (Si NPs) were uniformly dispersed on graphite sheets through ball milling to create a highly efficient conductive network, which were further entirely encapsulated by a nanoporous carbon shell via pyrolysis, forming a capsule-like core-shell structure. The integration of assembled graphite nanosheets featuring abundant internal voids spacing could significantly improve the electrical conductivity of Si NPs while effectively mitigate the lithiation associated volume expansion. Moreover, the abundant mesopores on the outer carbon shell provided rapid ion transport pathways, thereby enhancing the anode's overall electrochemical performance. The prepared Si/G@PCS electrode exhibited a high initial coulombic efficiency (ICE) of 80.65 % during the first cycle. After 100 cycles at a current density of 0.2 A g −1 , the electrode retained a reversible capacity of up to 971.5 mAh g −1 . Notably, even at a higher current density of 2 A g −1 , it still delivered a capacity of 711.5 mAh g −1 . The rational design and preparation for Si/G@PCS composite proposed in this study provides a feasible strategy for the large-scale preparation of high-energy-density silicon anode materials.
研究领域:
材料科学
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能源存储
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2017
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IF 4.233
Anquan Zhu,Pengfei Tan,Lulu Qiao,Yi Liu,Yongjin Ma,Jun Pan
Doping-type carbon matrixes not only play a vital role on their electrochemical properties , but also are capable of suppressing the crush and aggregation phenomenon in the electrode reaction process for pristine metallic compound . Herein, graphite coated cobalt and cobalt sulfide nanoparticles decorating on sulphur and nitrogen dual-doped mesoporous carbon (Co@Co 9 S 8 /S- N -C) was fabricated by a combined hydrothermal reaction with pyrolysis method. Benefited from g-C 3 N 4 template and original synthetic route, as-obtained Co@Co 9 S 8 /S- N -C possessed high specific surface area (751.7 m 2 g −1 ), large pore volume (1.304 cm 3 g −1 ), S and N dual-doped component and relative integrated graphite skeleton, as results it was developed as decent oxygen reduction electro-catalyst and ultra-long-life Li-ion battery anode. Surprisingly, compared with commercial Pt/C, it displayed a higher half-wave potential (0.015 V positive) and lower Tafel slop (66 mV s −1 ), indicating its superior ORR activities. Moreover, the ultra-long-life cyclic performances were revealed for lithium ion battery, exhibiting the retention capacities of 652.1 mAh g −1 after 610 cycles at 0.2 A g −1 , 432.1 and 405.7 mAh g −1 at 5 and 10 A g −1 after 1000 cycles, respectively. We propose that the synergistic effect of structure and chemical component superiorities should be responsible for the remarkable electrochemical behaviors of the Co@Co 9 S 8 /S- N -C.
研究领域:
材料科学
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电化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Yuxiu Yu,Qiang Zhang,Na Teng,Yaodong Liu
Silicon is widely recognized as an exceptionally auspicious anode material for lithium−ion batteries due to its remarkable specific capacity, suitable operational potential, and ecologically innocuous characteristics. This study presents a novel silicon@void@FC (fibrous carbon) composite anode material for lithium-ion batteries. Utilizing a one-step synthesis approach, the resulting hollow core–shell structure, combined with a mesoporous carbon shell, demonstrates exceptional electrochemical performance . The Si@Void@FC electrode exhibits remarkable cycle stability and rate performance, maintaining structural integrity over 500 cycles without observable degradation. The outer carbon shell acts as a protective layer and accommodates silicon volume expansion during cycling, preventing excessive contact with the electrolyte. The rich mesoporous structure facilitates efficient lithium-ion diffusion, enhancing lithiation and delithiation processes. The simplified one-step synthesis method further streamlines the preparation process, eliminating the need for complete silica template formation. This innovative Si@Void@FC composite material holds promise for advancing lithium-ion battery technology, addressing challenges associated with silicon-based anode materials, and offering insights into the design and synthesis of high-performance energy storage materials .
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
CHEMICAL ENGINEERING SCIENCE
·
2020
·
IF 3.871
Jingchao Wang,Tianyong Zhang,Shuang Jiang,Xiaoyuan Ma,Xiao Shao,Yiwei Liu,Di Wang,Xianggao Li,Bin Li
The electrostatic induced self-assembly method is successfully applied to prepare core-shell hierarchical structure of BiOI/OMCMB (Oxidized mesocarbon microbead) composites (MB), in which BiOI nanosheets were uniformly immobilized on the surface of OMCMB. The low-priced graphite carbon OMCMB played a crucial role in inducing and assembling the core-shell structure of the MB composites, which not only effectively improved the conductivity of the catalyst but also enhanced the stability of BiOI in the catalytic process. The photocatalytic degradation of tetracycline hydrochloride (TH) revealed that the hierarchical structure of OMCMB and BiOI promoted the photogenerated charge separation, and enhanced the photocatalytic performance of BiOI. And sample MB-3 had the highest photocatalytic performance with TH degradation of 96.8% under the visible-light irradiation for 60 min. MB-3 remains favorable photocatalytic activity after four cycles. Moreover, based on the related optical and electrical characterization analysis, a possible photocatalytic mechanism about MB composites was proposed tentatively.
研究领域:
材料科学
·
环境科学
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2018
·
IF 3.609
Zhimin Zou,Chunhai Jiang
A composite anode material consisting of a stable inner core of mesocarbon microbeads and a porous nitrogen-doped amorphous carbon shell active for lithium storage is prepared. The thin birnessite MnO 2 nanosheets hydrothermally deposited on mesocarbon microbeads are in situ replaced by polypyrrole , which is then transformed to nitrogen-doped amorphous carbon layer by calcination in nitrogen atmosphere. The surface modified mesocarbon microbeads exhibit average discharge capacities of 444 and 103 mA h g −1 at the current densities of 0.1 and 3 A g −1 , respectively, obvious higher than the corresponding values of the bare sample, 371 and 60 mA h g −1 . Moreover, the composite anode maintains a discharge capacity of 306 mA h g −1 after 500 cycles at 1 A g −1 , suggesting an excellent cycle stability. It is believed that the nitrogen-doped amorphous carbon layer has provided additional lithium storage capacity and stabilized the structure integrity of mesocarbon microbeads. This work demonstrates that the capacity and rate performance of commercial graphitic carbons can be much improved by simply introducing a nitrogen-doped carbon coating layer active for Li storage, making them attractive for high power Li-ion batteries.
研究领域:
材料科学
·
电化学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）