MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 9
·1-11
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IF 5.3
Lu Juan,Guo Yanjia,Shan Xiangyu,Song Yujia,Li Ruidan,Tian Li,Li Xuwen
A solid-state electrochemiluminescence (ECL) sensor was fabricated by immobilizing luminol, a classical luminescent reagent, on a Zn-Co-ZIF carbon fiber-modified electrode for the rapid and sensitive detection of procymidone (PCM) in vegetable samples. The sensor was created by sequentially modifying the glassy carbon electrode with Zn-Co-ZIF carbon fiber (Zn-Co-ZIF CNFs), Pt@Au NPs, and luminol. Zn-Co-ZIF CNFs, prepared through electrospinning and high-temperature pyrolysis, possessed a large specific surface area and porosity, making it suitable as carrier and electron transfer accelerator in the system. Pt@Au NPs demonstrated excellent catalytic activity, effectively enhancing the generation of active substances. The ECL signal was significantly amplified by the combination of Zn-Co-ZIF CNFs and Pt@Au NPs, which can subsequently be diminished by procymidone. The ECL intensity decreased proportionally with the addition of procymidone, displaying a linear relationship within the concentration range 1.0 × 10 –13 to 1.0 × 10 –6 mol L −1 (R 2 = 0.993). The sensor exhibited a detection limit of 3.3 × 10 –14 mol L −1 (S/N = 3) and demonstrated outstanding reproducibility and stability, making it well-suited for the detection of procymidone in vegetable samples. Graphical Abstract
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PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Jingqiu Li,Yi Feng,Lvye Yang,Jianfeng Yao
Metal ion-induced etching can effectively convert zeolitic imidazolate frameworks (ZIFs) to CoNi-layered double hydroxides (LDH). Here, different metal-ion-assisted etching methods are utilized to convert Co-ZIF-L to CoNi-LDH with various morphologies and electrochemical properties . The resultant CoNi-LDH (CoNi-1) with a composition of Co 0.7 Ni 0.3 (OH) 2 displayed a high electrochemical performance when Co-ZIF-L was treated in N, N -dimethylformamide-ethanol solution containing Co 2+ ions followed by Ni 2+ ion-induced etching under hydrothermal condition. The improved electrochemical performance of CoNi-1 can be attributed to structural advantages, where the well-dispersed ultrathin CoNi-LDH layers favor the exposure of surface active sites and promote ion diffusion to maximize electrochemical properties.
研究领域:
材料科学
·
电化学
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2019
·
IF 4.084
Xiao Wang,Liguo Yue,Jiebing Ai,Zheru Shi,Xi Lei,Taotao Sun,Hao Guo,Wu Yang
In this work, a Co-ZIF material and the derived nanoporous cobalt-rich carbons by direct carbonization of this Co-ZIF material were synthesized and used as electrode materials for supercapacitors . This ZIF material exhibited a high specific capacitance of 160.3 F g −1 at 0.5 A g −1 , an excellent rate capability (73.72 F g −1 at 10 A g −1 ), and a good cycling stability with 100% of its initials specific capacitance after 8000 cycles. In addition, the obtained derived nanoporous carbons displayed ideal capacitor behaviors and were promising electroactive materials for supercapacitors at low current density . The nanoporous carbon obtained at 650 °C possessed a highest specific capacitance of 393 F g −1 at 0.5 A g −1 and a wide potential application range of −1.0–0.33 V. In addition, a symmetric supercapacitor device consisting of Z-C-650 and activated carbon exhibited a maximum energy density of 61.23 Wh Kg −1 at a power density of 700 W kg −1 and predicted that Z-C-650 could be used as a potential energy storage material .
研究领域:
材料科学
·
能源存储与转换
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CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Lei Cai,Fei Pan,Xiaojie Zhu,Yanyan Dong,Yuyang Shi,Zhen Xiang,Jie Cheng,Haojie Jiang,Zhong Shi,Wei Lu
Exploring high-performance microwave absorbing materials with lightweight, thin thickness and strong electromagnetic wave (EMW) absorption capability is an essential way to solve EMW pollution problems. Herein, layered N-doped MXene (Ti 3 CNT x ) flakes and hollow Co-ZIF particles (HCF) hybrids were successfully fabricated using the controllable cooperative protection etching strategy and the electrostatic self-assembly technology . Remarkably, the microwave absorption hybrids achieved ultrathin (1.43 mm), and strong EMW absorption ability (reflection loss of −55.02 dB) with a rather low filler loading, which is superior to the magnetic–dielectric hybrids with similar components reported in the literatures. The synergistic effect generated by the improvement of dielectric loss , magnetic loss and interface polarization could effectively integrate with the impedance matching to improve the attenuation ability of EMW. Therefore, this simple assembly and etching strategy opens a new platform for designing hollow and layered materials and broadens the desirable candidates for lightweight and high-efficient microwave absorbers.
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高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Jinjie Wei,Qiang Yu,Hui Zhang,Jinbi Che,Qiao Wan,Zhengming Dai,Zhen Chen,Changming Li,Yuanyuan Zhang
In this study, a template-assisted method was successfully employed to derive NiCo layered double hydroxide nanoflowers (NiCo-LDH NFs) with a size of 400–600 nm from cobalt-zeolitic imidazolate framework (Co-ZIF) grown on carbon nanotubes (CNTs). These nanoflowers self-assembled on the CNTs into a distinctive three-dimensional (3D) lamellar architecture, resulting in the NiCo-LDH NFs/CNTs nanocomposite material, which was further leveraged to develop a novel nanozyme-based electrochemical glucose biosensor. The precise regulation of Ni2+ concentration facilitated the directional formation of NiCo-LDH into a 3D lamellar nanoflowers structure, effectively precluding the formation of disordered stacking configurations and thereby endowing it with a high specific surface area and abundant electrochemical active sites. In addition, the synergy between NiCo-LDH NFs and CNTs promoted efficient electron transfer during electrocatalysis, leading to excellent catalytic oxidation ability for glucose. With these merits, the NiCo-LDH NFs/CNTs showed a significant current response to various concentrations of glucose within the detection ranges of 0.5–1000 and 1000–5000 μM, having sensitivities of 1151 and 928.8 μA·mM–1·cm–2, respectively, with a limit of detection of 0.092 μM (S/N = 3). Moreover, the NiCo-LDH NFs/CNTs biosensor was successfully applied to the glucose detection of actual human serum samples, demonstrating the applicability of the biosensor and showing broad application prospects.
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NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Yafeng Jin,Xueyang Zhang,Didi Tong,Yinfeng Cheng,Fangming Han,Junchao Wu,Zhiying Qin
Heavy metal ions in food pose severe health risks, necessitating the development of simple and effective detection methods. In this work, we constructed an electrochemical sensor for simultaneous detection of Cd2+ and Pb2+ by modifying a glassy carbon electrode (GCE) with a composite of cobalt-based zeolitic imidazolate framework (Co-ZIF) and carbonized litchi pericarp (LP) for the first time. The Co-ZIF@LP/GCE sensor leverages a synergistic "adsorption-conduction" mechanism: Co-ZIF provides abundant adsorption sites and catalytic activity, while LP enhances electrical conductivity and stability. Electrochemical performance was evaluated using cyclic voltammetry and electrochemical impedance spectroscopy. Key parameters including buffer pH, modification material ratio, drop-coating volume, deposition potential, deposition time, and quiet time were optimized via square wave stripping voltammetry. Under optimal conditions, the sensor exhibited high sensitivity toward Cd2+ and Pb2+, with wide linear ranges (1-10 μM,10-65 μM) and low detection limits (0.028 μM and 0.197 μM). Practical application in rice and millet samples demonstrated good recovery and precision, confirming the method's reliability for detecting heavy metal ions in food samples.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2022
·
IF 24.319
Haichuan Zhang,Zede Yi,Shiyu Fu,Changzhi Li,Lucian A. Lucia,Qiying Liu
A rational design of the intrinsic lattice structure of catalysts is vitally important to address catalytic performance. Herein is reported a top-down synthesis for the fabrication of a bifunctional metallic catalyst. First, palladium nanocubes with (100) lattices planes were synthesized through a shape-control strategy; next, the as-synthesized Pd/Co-ZIF was used as a template for in - situ phase reconstruction by a spontaneous phase transformation process in the presence of H 4 SiW under solvothermal conditions. Ultimately, formation of 3D hierarchical flower-like bimetallic nitride nanosheets (SiW 12 @Pd/Co-ZIF-NS) were generated because of this process. The SiW 12 @Pd/Co-ZIF-NS catalyst not only displays excellent catalytic transfer hydrogenolysis for C-O bond cleavage of lignin dimeric substrates, but also maintains superior recycling durability due to an encapsulation phenomenon preventing aggregation. Finally, the resulting nanocomposites exhibit superior activity and good size selectivity toward catalytic transfer hydrogenolysis of the actual lignin substrates to produce a significant amount of low-molecular-weight aromatic compounds .
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Chunxia Yan,Shuai Jia,Jie Wei,Ziqiang Shao
Porous carbon aerogels derived from abundant biomass, which possess a unique structure, a high specific surface area and heteroatom doping, are a promising electrodes material for supercapacitors (SCs). In this study, an innovative hierarchical porous material comprising cobalt decorated porous carbons derived from cellulose nanofiber / graphene / Zn/Co ZIF carbon aerogels (CRZCs) has been successfully synthesized by directional freeze drying and carbonization methods. Cellulose nanofibers (CNFs) and graphene (rGO) layers play not only a supporting role, but also an internal storage site for electrolytes, contributing to the diffusion of electrolytes to the surface of active substances, at the same time enhance hydrophilicity of the aerogel and contribute to uniformly disperse Zn/Co ZIF. What's more important is that the carbon aerogels possess hierarchical porous involving micropores, mesopores and macropores, which further aid electrolyte penetration and ion storage. Furthermore, benefiting from the synergetic effect of hierarchical porous, high surface area, high conductivity, the prepared CRZC electrode obtains a high specific capacitance (364.6 F g −1 at 1 A g −1 ), an extraordinary capacitance retention rate (83.4 % at 10 A g −1 ). Simultaneously, the assembled supercapacitor by CRZC 900 exhibits a high specific capacitance (121.4 F g −1 at 0.5 A g −1 ), good charging/discharging rates, and remarkable cycling stability (78.9 % capacitance retention over 10000 cycles). The energy density up to 18.9 Wh kg −1 is achieved at power density of 288.4 W kg −1 , indicating its comprehensive applicability in energy storage. Finally, our results provide a general approach to construct hierarchical porous carbon aerogels for high-performance supercapacitors.
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高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2025
·
IF 6.3
Xiaolei Ye,Hang Luo,Shenghui Guo,Li Yang,Ming Hou,Yunchuan Li,Mengying Xu,Lei Gao,Zhiguang Hua
Developing advanced electromagnetic-wave absorbing materials that are thin, lightweight, broadband, and highly absorptive is essential for tackling electromagnetic-wave attenuation challenges in complex environments. Carbon fiber is considered an ideal matrix material due to its low density, high strength, and excellent mechanical properties. However, the terrible impedance match owing to high permittivity of carbon fiber hinders the application in the field of absorbent. Herein, a strategy of compositing MOF derivatives with carbon fibers were proposed and a new kind of complex was obtained. Due to the introduction of Co element, the composite complex material obtained through in-situ growth achieved a brilliant impedance matching performance thus realized a minimum reflection loss (RL min ) of -67.14 dB at 14.16 GHz and a matching thickness of 1.6 mm, along with an effective absorption bandwidth of 4.4 GHz. Besides, the introduction of a colloid carbon layer enhanced the interface polarization effect, enabling efficient electromagnetic wave absorption at a relatively thin coating thickness. This work offers a promising approach for designing and fabricating next-generation ultra-thin, high-performance stealth coating materials.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Jingqiu Li,Yuming Xie,Mengjue Cao,Yi Feng,Jianfeng Yao
The metal ion etching induced transformation of zeolitic imidazolate frameworks (ZIFs) to layered double hydroxides (LDHs) is closely related to the etching conditions. Here, by tuning the Ni 2+ etching conditions (e.g., initial Ni 2+ concentration and etching time), Co-ZIF-L templated CoNi-LDH with diverse morphologies and tailorable compositions are obtained and their resultant electrochemical properties are optimized. Mechanism study reveals that the etching conditions significantly affect the disassembling rate of Co-ZIF-L as well as the formation rate of CoNi-LDH, leading to the morphological and compositional variance of etched samples, which further results in their distinct electrochemical activities. The resultant asymmetric supercapacitor assembled with Co-ZIF-L derived CoNi-LDH and activated carbon can achieve a maximum energy density of 77.3 Wh/kg at a power density of 700 W/kg with the capacity retention of 85.7 % after 2000 cycles, superior or comparable to other advanced CoNi-LDH based supercapacitors .
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DOI
PubMed
高影响因子
EUROPEAN POLYMER JOURNAL
·
2025
·
IF 6.3
Qi Tao,Hang Yao,Zehao Gu,Xiaofei Yang,Junli Shi,Dong-An Wang,Hui Chong
The treatment of chronic wounds are characterized by a local tissue with issues such as the accumulation of free radicals and persistent inflammation, which contribute to delayed wound healing. Thus, it has emerged as a significant global challenge, profoundly impacting patients’ quality of life and even posing threats to their lives. In this study, we fabricted a CCM (Curcumin)–Co-ZIF-8 nanoparticle (CCZ)@oxidized ammonium alginate (OSA)/carboxymethyl chitosan (CMCS)/tannic acid (TA) composite multifunctional bioactive hydrogel. This nanocomposited double-crosslinked network hydrogel dressing exhibits excellent mechanical properties and self-healing abilities. Additionally, the hydrogel shows good biocompatibility. Due to the formation of dynamic Schiff base bonds between oxidized sodium alginate and CMCS, the hydrogel-TA spray system possesses injectability upon applied to a wound model in mice, allowing better adaptation to irregular wound shapes. Furthermore, it could promote synergistic antibacterial, antioxidant, and anti-inflammatory effects, thereby accelerating wound healing. Our findings highlight the potential of this multifunctional hydrogel system as an advanced therapeutic option for chronic wound management.
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2022
·
IF 10.53
Yong Liu,Chao Wu,Zhongming Zhou,Wei Liu,Hongyu Guo,Baoquan Zhang
The development of high-performance mixed matrix membranes (MMMs) with satisfactory structure stability has attracted much attention for the past few years. The rational design and synthesis of fillers to well coordinate themselves in the polymeric matrix is still challenging. The core-shell structured fillers were synthesized via the heteroepitaxial growth of ZIF-8 on ZIF-L(Co) surface (ZIF-L(Co)@ZIF-8), which were then embedded into Pebax to fabricate MMMs for enhanced CO 2 /CH 4 separation. The synthesized fillers and MMMs were characterized via SEM with EDS mapping, TEM, XRD , FIIR and nanoindentation measurements. The effects of ZIF-L(Co)@ZIF-8 loading and filler components on gas separation performance were studied with the evaluation of membrane stability. The experimental results indicated that the filled ZIF-L(Co)@ZIF-8 could be evenly distributed within the bulky Pebax. The synergistic effect of the core-shell structured fillers in adsorption and molecular sieving endowed the synthesized MMMs with superior gas separation performances. The optimal separation performance is achieved for the MMM containing 3 wt% of ZIF-L(Co)@ZIF-8 with a CO 2 permeability of 145.7 Barrer and a CO 2 /CH 4 selectivity of 40.9, corresponding to 79.1% and 110.1% increases over pure Pebax membrane.
研究领域:
材料科学
·
膜技术
·
气体分离
·
聚合物纳米复合材料
·
金属有机框架材料（MOFs）
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DOI
高影响因子
危险品化学品经营许可证（带存储）