DIAMOND AND RELATED MATERIALS
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2024
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IF 4.3
Fenghai Zhou,Wei Li,Junjie Ma,Shaocong Wang,Mingjun Lu,Zheng Liu,Guo-Cheng Han
N-doped porous carbon material (N-PC) was generated through high-temperature cracking, using ZIF-8 as a template, and preparation of Na 3 V 2 (PO 4 ) 2 F 3 /N-PC composites were designed and prepared as cathode materials for sodium-ion batteries, and the electrochemical sodium storage performance was systematically investigated. The physical characterization results showed that the addition of N-PC played a role in increasing the electrical conductivity of Na 3 V 2 (PO 4 ) 2 F 3 material and improving the specific surface area. The electrochemical test results showed that the discharge specific capacity of Na 3 V 2 (PO 4 ) 2 F 3 /N-PC composite was 109.56 mAh/g at 0.1C, and the capacity retention rate was 85.10 % after 100 cycles, and the R SEI of Na 3 V 2 (PO 4 ) 2 F 3 /N-PC composite (81.55 Ω) is better than that of Na 3 V 2 (PO 4 ) 2 F 3 pure-phase material (142.5 Ω), which indicates that the ion transfer impedance of the modified material has been effectively reduced, and the ion de-embedding is more fluent.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
LWT-FOOD SCIENCE AND TECHNOLOGY
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2021
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IF 4.952
Zuobing Xiao,Zhaocheng Fan,Yunwei Niu,Xingran Kou
Proanthocyanidin has attracted increasing attention in recent years due to its antibacterial and antifungal properties and other health benefits. In this study, we successfully generated a novel delivery system, hollow proanthocyanidin cube cages, for cargo molecule encapsulation. First, ZIF-8 particles were prepared and etched with proanthocyanidins. Second, by accurately adjusting the ZIF-8 particle size and etching time, yolk shell metal polyphenol frameworks and hollow proanthocyanidin cube cages with various sizes were obtained. The structural and thermal properties of these yolk shell structures and hydrophilic hollow cages were analyzed. To test their potential application as functional component carriers, we loaded cypress essential oil in the hollow proanthocyanidin cube cages. These cages showed good loading capacity (26 wt%) and antimicrobial activity, especially for Aspergillus niger . In conclusion, hollow proanthocyanidin cube cages with a definite spatial structure are promising alternative carriers with potential applications in food , cosmetic, and medical fields.
研究领域:
材料科学
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食品科学
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医学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
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2015
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IF 4.504
Yonghai Song,Li Zuo,Shouhui Chen,Jiafeng Wu,Haoqing Hou,Li Wang
Novel porous cage-like carbon (C)/nano-Si nanocomposites as anode materials for lithium-ion batteries (LIBs) was prepared based on nano-Si@zeolitic imidazolate frameworks (ZIF-8)-templated method. In this strategy, p-aminobenzoic acid was initially grafted onto nano-Si to form benzoic acid-functionalized nano-Si, and then nano-Si@ZIF-8 was constructed by alternately growing Zn(NO 3 ) 2 ·6H 2 O and 2-methylimidazolate on benzoic acid-functionalized nano-Si under ultrasound. The novel porous cage-like nano-Si/C nanocomposites were fabricated by pyrolyzing the resulted nano-Si@ZIF-8 and washing with HCl to remove off ZnO. Scanning electron microscopy, transmission electron microscopy, X-ray powder diffraction, Raman spectra and N 2 adsorption/desorption isotherms were employed to characterize the porous cage-like nano-Si/C nanocomposites. The resulted nano-Si/C nanocomposites as anode materials for LIBs showed a high reversible capacity of ∼1168 mA h g −1 at 100 mA g −1 after 100 cycles, which was higher than many previously reported Si/C nanocomposites. The porous nanostructure, high specific surface area and good electrical conductivity of the cage-like nano-Si/C nanocomposites contributed together to the good performance for LIBs. It might open up a new way for application of silicon materials.
研究领域:
材料科学
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能源科学
✓ 已验证
DOI
高影响因子
JOURNAL OF CATALYSIS
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2021
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IF 7.92
Huiyuan Cheng,Xuemei Wu,Xiangcun Li,Yayun Zhang,Manman Feng,Zihao Fan,Gaohong He
Electrochemical CO 2 conversion offers a sustainable approach to alleviate the energy crisis but remains a long-standing challenge. Herein, atomically dispersed FeN 5 sites anchored on N-doped carbon matrix templated by zeolitic imidazole framework-8 (ZIF-8) are facilely synthesized for efficient catalyzing CO 2 reduction. The FeN 5 single-atom catalyst (Fe-SA/ZIF) presents the Faradaic efficiency of 98% at −0.7 V vs . RHE and over 95% in a wide potential range from −0.4 to −1.0 V vs . RHE, surpassing most of the reported single-atom catalysts for CO 2 RR. Further density functional theory (DFT) calculations reveal that the outstanding activity of FeN 5 sites mainly originates from the lowered d -band center modulated by the out-of-plane coordinated pyridinic N, which reduces the CO adsorption energy from −1.71 to −1.49 eV compared to FeN 4 moieties. Thus, the synergistic effect between FeN 4 sites and the coordinated pyridine offers new insight in designing outstanding electrocatalysts for multiple applications.
研究领域:
材料科学
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电化学
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理论计算
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Zhiqiang Guo,Juanjuan Meng,Xinxin Li,Xinlong Wang,Yuan Li,Liangliang Hu
Layered double hydroxides (LDHs), despite their unique layered structure advantageous for removing high-molecular-weight antibiotics, suffer from limitations such as small specific surface area, uncontrollable morphology, and irregular spatial structure compared to metal–organic frameworks (MOFs). Therefore, in this study, ZIF-8 was used as a template to prepare LDHs with a hollow mesoporous structure (ZNF-HS), merging the benefits of both materials. ZNF-HS was then stably incorporated into sodium carboxymethylcellulose aerogels, resulting in ZNF-HS@CMC composites that facilitated easy solid–liquid separation and were effective in removing tetracycline (TC) and ciprofloxacin (CIP) from aqueous solution. Characterization of ZNF-HS@CMC was conducted using SEM, TEM, XRD, FTIR, XPS, BET, and TGA. ZNF-HS@CMC exhibited a specific surface area of 248.753 m 2 ·g −1 and a pore volume of 0.568 cm 3 ·g −1 , surpassing traditional LDHs. The removal of TC and CIP by ZNF-HS@CMC followed the pseudo-second-order kinetic and Langmuir models, with maximum sorption capacities of 513.772 and 442.515 mg·g −1 , respectively. pH significantly influenced the removal efficiencies, while NaNO 3 concentration up to 0.25 mol·L −1 had negligible impact, maintaining removal efficiencies above 90 %. After five sorption–desorption cycles, the removal efficiencies remained above 80 %. The removal of TC and CIP by ZNF-HS@CMC was primarily achieved through surface complexation, hydrogen bonding, and π-π interactions, with electrostatic interactions also contributing. Overall, ZNF-HS@CMC exhibits the advantages of easy recycling, good reusability, strong resistance to salt interference, and high sorption capacity, making it promising for practical applications in the efficient removal of antibiotics from water.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
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2021
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IF 9.229
Guang Li,Juan Yang,Yulian Chen,Min Liu,Xiaowei Guo,Gairong Chen,Baobao Chang,Tianjing Wu,Xianyou Wang
Looking for a high-efficiency, durabile, and low-cost dual-functional oxygen electrocatalyst as the air electrode catalyst in rechargeable zinc-air batteries (ZABs) is urgently desirable but faces many challenges. Herein, we propose the preparation strategy of effectively using a bifunctional electrocatalyst (Fe–Nx/C) based on the zeolite imidazole organic framework-8 (ZIF-8) as the template agent, with surface modification coated by ferrocene (Fc) molecules followed by pyrolysis at high temperature under inert atmosphere. Benefiting from the surface modification of ZIF-8 with Fc molecules, more abundant multiple catalytic Fe/Fe–Nx/FeCx sites with high intrinsic activity are derived, the resultant Fe–Nx/C exhibits excellent potential gap (ΔE = 0.63 V) and durability, which is obviously superior to the Pt/C + IrO2 benchmark (ΔE = 0.77 V) and other state-of-the-art electrocatalysts. Furthermore, the assembled rechargeable ZABs employing the Fe–Nx/C as an air-electrode show a reduced charging–discharging potential difference of 0.603 V, high power density of 214.8 mW cm–2, and long-term cycling stability of more than 290 h at 2.0 mA cm–2. Therefore, this work presents a feasible strategy to prepare a high-efficiency and durability ORR/OER bifunctional electrocatalyst toward high performance ZABs and next-generation energy storage devices.
研究领域:
材料科学
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电化学能存储与转换
✓ 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）