MICROCHIMICA ACTA
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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
研究领域:
分析化学
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食品安全检测
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DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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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.
研究领域:
材料科学
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能源存储
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化学工程
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Guodong Zhao,Ya Liu,Jingyu Pan,Chang Liu,Yinghe Hu,Zhe Gao,Xupin Zhuang
Excessive CO 2 emissions and the resultant global warming present significant environmental challenges, posing threats to human health and public safety. Metal–organic frameworks (MOFs), known for their high specific area and large porosity, hold the promise for CO 2 capture. However, a major obstacle is the low loading mass of MOFs and the limited interface affinity and compatibility between MOFs and substrates. In this study, we present an electrospinning-assisted in-situ synthesis dual metallic framework strategy for preparing flexible Zn/Co-ZIF nanofibrous membranes (NFMs). This method achieves the high loading mass of MOFs and introduces abundant Lewis basic sites, thereby enhancing the CO 2 adsorption. The dual metallic Zn/Co-ZIF NFMs exhibit remarkable features, including high MOF loading mass (70.23 wt%), high specific surface area (379.63 m 2 g −1 ), large porosity (92.34 %), high CO 2 adsorption capacity (4.43 mmol/g), high CO 2 /N 2 adsorption selectivity (37), and high CO 2 /CH 4 adsorption selectivity (31). Moreover, the dual metallic Zn/Co-ZIF NFMs demonstrate robust structural stability and durability attributed to the excellent interface affinity between MOFs and NFMs, retaining 96.56 % of their initial capacity after 10 adsorption–desorption cycles. This work presents a prospective direction for developing flexible dual metallic MOF NFMs for the efficient capture of CO 2 .
研究领域:
材料科学
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环境科学
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DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 30
·期 4
·10969-10981
·
IF 5.19
Yu Hongxia,Ding Dan,Zhao Shuailing,Faheem Muhammad,Mao Weijie,Yang Li,Chen Liwei,Cai Tianming
We report on the preparation of Co/N-NPC x/y with porous structure and excellent activation properties. The synthesis involves the preparation of Zn/Co-ZIF x and the carbonization of Zn/Co-ZIF x at a high temperature in an inert atmosphere. The volatilization of zinc during carbonization results in a porous structure, which is beneficial to the migration of pollutants. The sizes, specific surface areas, and pore size distribution of Co/N-NPC x/y can be achieved by tuning Zn/Co ratio. The calcination temperatures mainly affect the crystalline phase, crystallinity, and magnetic properties of the as-prepared materials. The effects of the as-prepared materials properties and activation conditions on the Rhodamine B (RhB) degradation by PMS activation were investigated. Overall, it exhibited superior catalytic activity in PMS activation, as evidenced by almost complete removal of RhB (0.020 mM, 100 mL) by using 5 mg/L Co/N-NPC 0.5/900 and 1.250 mM PMS within 30 min. Furthermore, it confirmed the participation of SO 4 •− , •OH, and 1 O 2 in the catalytic reaction, and both SO 4 •− and 1 O 2 were the main reactive oxygen species that play a major role.
研究领域:
环境科学
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材料科学
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化学工程
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DOI
PubMed
高影响因子
Small
·
2025
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IF 12.1
Haoyi Wang,Le Xu,Chunying Si,Yankai Zhang,Yunbiao Qi,Quanxing Zhang,Wei Jiang
Mixed polyester wastes with different chemical structures remain a key obstacle to achieving circularity in plastic utilization. Here, a programmable one-pot photothermal strategy is reported using a catalyst derived from a bimetallic MOF (Zn/Co-ZIF-C) through pyrolysis of a Zn/Co-integrated precursor. This system enables the efficient and sequential depolymerization of polycarbonate (PC), polylactic acid (PLA), and polyethylene terephthalate (PET) in mixed streams by simply tuning the irradiation intensity. Selective glycolysis of PC, PLA, and PET is triggered at ≈420, 520, and 650 mW cm −2 , respectively, enabling stepwise monomer recovery in a single reactor. Density functional theory calculations reveal a dual-site cooperative mechanism, in which ZnO and Co-N x sites cooperatively activate ester bonds and ethylene glycol, offering a mechanistic basis for the observed substrate-specific reactivity. The Zn/Co-ZIF-C catalyst exhibits broadband light absorption, strong catalytic activity, and excellent recyclability, maintaining over 95% PET conversion across five cycles. Moreover, it achieves monomer yields above 80% from nine real-world post-consumer plastics, while simultaneously removing dyes and performing magnetic separation. This work presents a robust and scalable catalytic platform for light-controlled, selective upcycling of complex polyester mixtures, offering new opportunities for sustainable plastic circularity.
研究领域:
材料科学
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环境化学
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催化
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高分子化学
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可持续能源
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DOI
PubMed
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
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2025
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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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高影响因子
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