SYNTHETIC METALS
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2025
·
IF 4.6
Ran Xu,Man He,Haoyuan Li,Shuangjiang Feng,Yongjuan Wang,Xiaohai Bu,Yuming Zhou
The strategy of customizing MOF-derived electromagnetic wave (EMW) absorbing materials through the construction of precursor size has become a new research direction. While exploring the dimensional adaptability of Co-MOF derivatives in graphene hybrid aerogel for electromagnetic wave absorption is not widely researched, manipulating the compositions and microstructures of EMW absorbing materials has been found to afford superior EMW absorption. Herein, a series of Co-N/C@graphene hybrid aerogel (CNGA) were successfully synthesized by integrating graphene and multi-scale Co-MOF derivatives which are derived from multi-scale Co-MOF precursors. The results displayed the CNGA containing nanoscale Co-MOF derivatives at a 20 wt% filler ratio exhibited the optimal reflection loss (−46.8 dB, 2.7 mm) and the maximum effective absorption bandwidth (5.3 GHz, 2.1 mm). The exceptional EMW absorption properties are credited to the collaborative impact of distinctive loss mechanisms benefited from the small particle size of Co-MOF derivatives in CNGA and appropriate filler ratio. This work demonstrates the correlations between the size of Co-MOF derivatives and electromagnetic parameters of CNGA, and provides a guidance for the development of advanced hybrid aerogel electromagnetic wave absorbing materials.
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高影响因子
FUEL
·
2026
·
IF 7.5
Hang Zhang,Bo Yang,Shihao Zhao,Binbin He,Yun Zu
Cobalt-catalyzed propane dehydrogenation (PDH) has demonstrated considerable potential to surpass commercial Pt- and Cr-based catalysts, while achieving a balance between reactivity and stability remains challenge due to fickle Co speciations. Herein, two Co/SiBEA zeolite catalysts were designed under H 2 and Air atmosphere using dealuminated SiBEA as the support and cobalt(II) acetylacetonate as the precursor. The H 2 -derived catalyst featured the high-polymeric CoO x species onto the surface, delivering a high propylene space–time-yield (STY) of 228.9 kgC 3 H 6 ·kg Co −1 ·h −1 , but deactivated rapidly (k d = 0.175 h −1 ). In contrast, the Air-treated catalyst yielded low-polymeric CoO x clusters confined into zeolite channels, exhibiting remarkable stability (k d = 0.013 h −1 ) with a moderate STY of 156.9 kgC 3 H 6 ·kg Co −1 ·h −1 . Moreover, the catalyst maintained relatively stable operation for 50 h at 550 °C. Mechanistic studies further revealed that the high-polymeric CoO x species promoted hydrocarbon hydrogenolysis via Co-H phase, accelerating coke deposition, whereas the confined CoO x clusters effectively suppressed the formation of aromatic carbon precursors and facilitated propylene desorption. These findings offer a guideline for designing highly active and stable Co-based PDH catalysts.
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高影响因子
ACS Catalysis
·
2018
·
IF 11.384
Tian-yuan Chen,Junjie Su,Zhengpai Zhang,Chenxi Cao,Xu Wang,Rui Si,Xianglin Liu,Bianfang Shi,Jing Xu,Yi-Fan Han
CeO2 nanorods supported Co–CoOx catalysts showed high selectivity for higher alcohol synthesis (HAS) from syngas. The selectivity has found to increase with lowering the Co loadings, and the value over Co1/CeO2 (19.86%) is twice higher than that over Co5/CeO2 (8.67%). The active sites at the interfaces between Co0 and CoOx, or to say, Co–CoOx pairs, have evidenced to be responsible for HAS. The strong metal–support interactions between Co and CeO2 retard the reduction of CoOx and stabilize the intermediates such as CO–Coδ+. Likely, CO favors dissociating on the metallic Co surface to form CHx species, while CO is associatively activated on Coδ+ sites. Moreover, the structure evolution of the Co–CoOx interface was revealed during calcination, reduction, and reaction using in situ X-ray diffraction (XRD), in situ Raman spectroscopy, X-ray absorption spectroscopy (XAS), and in situ diffuse reflectance infrared fourier transform spectroscopy (CO-DRIFTS). The structure–performance relationship of HAS over Co/CeO2 was proposed.
研究领域:
催化化学
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材料科学
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化学工程
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无机化学
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高影响因子
Journal of Macromolecular Science Part B-Physics
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2019
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IF 1.204
Wei Wu,Zhihua Zhou,Wenjuan Liu,Yunhui Zhao,Yanmin Zhao,Tianlong Huang,Xiaofei Li,Jianjun Fang
A random terpolymer of poly(L-lactide-co-glycolide-co-ε-caprolactone) (PLLGC) was synthesized from L-lactide, glycolide and ε-caprolactone. The in-vitro hydrolytic degradation behavior of the PLLGC terpolymer was investigated as a function of the degradation time; the results showed that the degradation rate of PLLGC was lower than that of PLGA due to a reduction in the acidic degradation products. Therefore, we suggest the degradation rate of the PLGA could be controllable by introduction of ε-caprolactone into the PLGA martrix, while the physical properties (mechanical, etc.) were superior to PLGA.
研究领域:
高分子科学
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生物材料
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生物医学工程
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药物递送系统
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2026
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IF 12.5
Yufei Yang,Yan Zhang,Chenying Zhou,Nuzahat Habibul,Peng Yan,Peng Zhou,Bo Lai
The sluggish reaction kinetics between H₂O₂ and Fe(III) significantly limit the practical application of the Fenton process. Although nitrogen-doped carbon materials (C N) can promote electron transfer and facilitate Fe(III) reduction, further enhancement of Fe(III)/Fe(II) redox cycling remains challenging. Herein, we propose a synergistic phosphorus and nitrogen co-doping strategy to overcome this limitation. By optimizing surface electronic structure and porous characteristics, the prepared nitrogen and phosphorus co-doped carbon (CN–P) markedly improved the reduction efficiency of Fe(III). Phosphorus incorporation modulates charge distribution, enhances electron transport capability, and increases the redox activity of surface Fe(III), thereby accelerating H₂O₂-induced Fe(III) reduction. The optimized CN–P–4 catalyst exhibited a pseudo-first-order rate constant ( k obs ) of 0.51 min −1 , which is 2.68 times higher than that of C N (0.19 min −1 ), demonstrating effective acceleration of the rate-determining step in the Fe(III)/Fe(II) cycle. Spectroscopic and electrochemical analyses confirm that the enhanced performance originates primarily from electronic structure regulation rather than surface area effects. Despite possessing only moderate specific surface area with predominant meso /macroporous features, CN–P achieved efficient pollutant degradation through enhanced hydroxyl radical (•OH) generation. Mechanistic studies reveal that highly active surface Fe(III) species can be readily reduced by H₂O₂ without external energy input, initiating a self-sustained Fenton chain reaction. This work provides mechanistic insight and a rational design strategy for developing efficient and sustainable Fenton co-catalysts.
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高影响因子
BIOCHEMICAL ENGINEERING JOURNAL
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2026
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IF 3.6
Rui Zhao,Wenhui Yang,Yunhan Cao,Haonan Zhu,Yiye Tu,Yingxue Yu,Fenghuan Wang
CA and FDH were respectively compartmentalized immobilized in different MOFs by self-assembly. • GDH was co-immobilized with FDH to facilitate in-situ cofactor regeneration. • The characterizations showed compartmentalized immobilized multi-enzyme was rationally constructed as designed. • This compartmentalized multi-enzyme system shows excellent CO 2 conversion efficiency. Multi-enzyme cascade systems provide an efficient route for CO₂ reduction and conversion into value-added products. Formate, as the first key product in CO₂ reduction, has attracted considerable interest. However, inefficient cofactor regeneration, limited enzyme stability, and mass-transfer constraints remain major challenges. Herein, a compartmentalized co-immobilized multi-enzyme system was rationally designed to enhance CO₂-to-formate conversion efficiency. Formate dehydrogenase (FDH) and glutamate dehydrogenase (GDH) were co-encapsulated within ZIF-L to enable localized cofactor regeneration and reduced diffusion resistance, while carbonic anhydrase (CA) was independently immobilized on DUiO-67 to facilitate CO₂ hydration and improve substrate availability. The two enzyme-loaded carriers were subsequently integrated via self-assembly strategy to construct a compartmentalized multi-enzyme cascade reactor. The resulting composite preserved the crystalline structure and morphology of the pristine carriers and exhibited a well-defined spatial distribution of CA, FDH, and GDH consistent with the design concept. The compartmentalized system achieved a significantly higher formate yield than free tri-enzyme systems and non-compartmentalized dual-enzyme immobilization. Compared with previously reported immobilized multienzyme platforms for CO₂ conversion, this strategy demonstrates superior catalytic efficiency. Moreover, the modular immobilized carrier coupled with cofactor regeneration is readily extendable to other cofactor-dependent redox cascade reactions, offering a scalable and cost-effective platform for CO₂ bioconversion. Download: Download high-res image (140KB) Download: Download full-size image
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高影响因子
JOURNAL OF DRUG DELIVERY SCIENCE AND TECHNOLOGY
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2023
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IF 5
Pingfu Huang,Hui Yan,Hao Wu,Lulu Liu,Wenmin Niu,Bo Zhai,Ziwei Hu,Jingjuan Li,Qianming Du,Yang Zhou
The co-amorphous (CAM) system has attracted widely attention for improving the solubility of poor water solubility drug and provide a formulation strategy for combination administration system. Paclitaxel (PTX) belongs to biopharmaceutics classification system (BCS) class Ⅳ drug, with the poor water solubility and membrane permeability. This study aimed to preparing the CAM system between PTX and curcumin (CUR) by rotary evaporation method. The solid-state characterization of CAM indicated that the PTX and CUR presented as amorphous state, compared with crystalline PTX and CUR, the amorphous system could improve the saturated solubility and dissolution with significantly difference, besides, the PTX absorption permeability increased after amorphization with CUR, and the rat pharmacokinetic study exhibited that the PTX-CUR had a high C max and AUC 0-∞ compared with crystalline CUR and PTX, Furthermore, the amorphous CUR and PTX exhibited the stronger anti-tumor efficacy in A549 cell model in vivo . In addition, PTX-CUR exhibited physical stability under the long-term storage condition. In conclusion, amorphization of PTX and CUR provided a promising mothed to improve the anti-tumor efficacy and oral bioavailability of PTX.
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高影响因子
Nature Communications
·
2023
·Vol. 14
·期 1
·1-13
·
IF 16.6
Luo Huihui,Tian Shuainan,Liang Hongliang,Wang He,Gao Shuang,Dai Wen
The cleavage and functionalization of C–S bonds have become a rapidly growing field for the design or discovery of new transformations. However, it is usually difficult to achieve in a direct and selective fashion due to the intrinsic inertness and catalyst-poisonous character. Herein, for the first time, we report a novel and efficient protocol that enables direct oxidative cleavage and cyanation of organosulfur compounds by heterogeneous nonprecious-metal Co-N-C catalyst comprising graphene encapsulated Co nanoparticles and Co-Nx sites using oxygen as environmentally benign oxidant and ammonia as nitrogen source. A wide variety of thiols, sulfides, sulfoxides, sulfones, sulfonamides, and sulfonyl chlorides are viable in this reaction, enabling access to diverse nitriles under cyanide-free conditions. Moreover, modifying the reaction conditions also allows for the cleavage and amidation of organosulfur compounds to deliver amides. This protocol features excellent functional group tolerance, facile scalability, cost-effective and recyclable catalyst, and broad substrate scope. Characterization and mechanistic studies reveal that the remarkable effectiveness of the synergistic catalysis of Co nanoparticles and Co-Nx sites is crucial for achieving outstanding catalytic performance.
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DOI
PubMed
高影响因子
Journal of Food Measurement and Characterization
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2022
·Vol. 17
·期 2
·1662-1670
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IF 3.006
Yang Zhengfei,Zhang Weijia,Zhu Jiangyu,Yin Yongqi,Xue Huaiguo,Fang Weiming
Detection and control of nitrite are major concerns in recent years for ensuring food and environmental safety. In this study, Mn, N co-doped Co-Carbons (CoMnN-Cs) were synthesized by calcination of bimetallic Co-Mn zeolite-imidazolate framework (CoMnZIF-67) materials at different temperatures (600–900 °C) in nitrogen atmosphere. Many characterizations, such as scanning electron microscope (SEM), elemental mapping, and, N 2 adsorption–desorption were performed to analyze the morphology, structure, and composition of the CoMnN-Cs. SEM revealed the generation of rich carbon nanotubes (CNTs). Mn-doping was obtained, which could be seen from the elemental mapping. The characterization also revealed that the pyrolysis temperature has an important effect to catalytic activities. From obtained results, it was found that the CoMnN-Cs prepared at 800 °C (CoMnN-Cs-800), showed better detection performance compared with CoMnN-Cs developed at other temperatures. As a result, the CoMnN-Cs-800-based sensor manifested an extended linear range (from 0.2 to 7000 μM), a low detection limit of 0.16 μM, and high sensitivity. Meanwhile, the developed sensor exhibited good selectivity, reproducibility, and long-term stability. Moreover, the sensor achieved satisfactory recoveries for the quantification of nitrite in tap water and sausage samples. This study implies CoMnN-Cs-800 is a promising material for the measurement of nitrite. Graphical abstract
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
·
IF 9.965
Haiyan Zheng,Jun Zhong,Xinyan Liu,Ying Zhu,Baoshan Hou,Liang Zhao,Chunyi Sun,Xinlong Wang,Zhongmin Su
Rational design of high-performance bifunctional electrocatalysts to accelerate the sluggish oxygen reduction reactions (ORR) and oxygen evolution reactions (OER) in rechargeable Zn–air batteries remain an enduring challenge. The construction of multicomponent catalysts is a promising solution to achieve this goal. Herein, B and N co-doped interconnecting graphite carbon and carbon nanotube with the decoration of Co and vanadium nitride (VN) nanoparticles (Co/BN-CNT/VN) are synthesized using Co-modified polyoxovanadoborates as precursors. The optimized composite achieves superior bifunctional oxygen electrocatalytic activity and stability, which is comparable to noble metal catalysts and reported bifunctional electrocatalysts. Specifically, the half-potential of ORR reaches 0.85 V, and the overpotential of OER is low to 296 mV at a current density of 10 mA cm −2 . Strikingly, zinc–air batteries assembled based on Co/BN-CNT/VN demonstrate a small charge–discharge voltage gap of 0.873 V, a remarkable peak-power density of 156.3 mW cm −2 , and outstanding cycling durability (∼1000 cycles at 10 mA cm −2 ). This work affords a new alternative strategy to create cost-effective and high-potency bifunctional oxygen electrocatalysts for advanced air batteries.
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PubMed
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2022
·
IF 6.364
Pingan Tan,Xu Huang,Jingsong Liu,Lijia Cao,Fei Yang,Chong Xian,Honglan Yuan
Y 2.5- x Bi 0.5 Al x Fe 5 O 12 (YIG-Al x ) ceramics have been synthesized at 1175 ℃ by the solid-state reaction method. The effects of the co-doped Bi 3+ , Al 3+ ions on the phases, micromorphology, and dielectric and magnetic properties of the yttrium iron garnets (YIG) were investigated. Excessive introduction of Al 3+ ions led to the collapse of the YIG lattice and precipitation of the Bi 3+ and Fe 3+ ions; while moderate Al 3+ doping improved the dielectric properties , but not the saturation magnetization. The YIG-Al 0.2 ceramics proved to have particularly good electromagnetic properties ( ε r = 18.34 ± 0.05@11.19 GHz, tan δ = 3.09 ± 0.55 × 10 −4 , M s = 19.82 ± 0.55 emu/g). Additionally, tightly bonded Y 2.3 Bi 0.5 Al 0.2 Fe 5 O 12 /Ni 0.8 Zn 0.2 Fe 2 O 4 (YIG-Al 0.2 /NZF) composite substrates were prepared by co-firing at 1175 ℃. The composite substrates exhibited superior electromagnetic properties (YIG-Al 0.2 : ε r = 18.37 ± 0.05@11.15 GHz, tan δ = 3.08 ± 0.55 × 10 −4 , M s = 21.09 ± 0.55 emu/g; NZF: M s = 67.5 ± 0.55 emu/g), which were slightly affected by the diffusion of Ni and Zn from the NZF. Our findings show that YIG-Al 0.2 /NZF substrates have great potential for use as RF band circulators.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Jun Yu,Bin Hu,Pengfei Nie,Xiaohong Shang,Boshuang Zhang,Zhaoyu Tang,Jianmao Yang,Jianyun Liu
Norfloxacin (NX), as one of the most widely used antibiotics, is becoming a potential pollutant in water. Here, the cobalt-decorated nitrogen-rich carbon material containing abundant carbon nanotubes (Co@C-NCNTs) was synthesized by pyrolysis of the Co,Zn bimetal organic frameworks (Co,Zn-MOF). The introduction of Zn led to the formation of abundant CNTs with high aspect ratio and high N-doping in the carbon metrix. The obtained Co@C-NCNTs catalyst was applied to boost non-radical catalysis of peroxymonosulfate for NX degradation with high efficiency. The release of cobalt was greatly inhibited by Co-N interaction and carbon layer protection. The CNTs amount in Co@C-NCNTs and its catalytic activity were tunable with the Zn/Co ratio. At the optimal Zn/Co ratio, the derived Co@C-NCNTs delivered 92% removal of NX in 30 min, significantly higher than the single Co-MOF based catalyst. Free radical quenching experiments and electron paramagnetic resonance demonstrated the singlet 1 O 2 -dominated degradation process of NX accompanied by the •OH and S O 4 − effect. The electrochemical characterization verified that the electron transfer in the PMS system is greatly enhanced due to the presence of Co@C-NCNTs.
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高影响因子
危险品化学品经营许可证（带存储）