RARE METALS
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2021
·Vol. 41
·期 1
·189-198
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IF 4.003
Tang Jing,Hui Zhen-Zhen,Hu Tao,Cheng Xin,Guo Jia-Hao,Li Zi-Rong,Yu Hao
The composite of zeolitic imidazolate frameworks (ZIF-67) and ordered macroporous carbon (OMC) was successfully synthesized via in situ growth from the OMC matrix. The ZIF67–OMC composite was verified by scanning electron microscopy (SEM) and transmission electron microscopy (TEM), powder X-ray diffraction (XRD) and electrochemical impedance spectroscopy (EIS) and then evaluated as a modified material for electrochemical sensor. Benefitting from the large surface area and enhanced conductivity of the ZIF67–OMC composite, ZIF67–OMC nanocomposite showed superior electrocatalytic performance toward acetaminophen (AP) oxidation. The redox reaction of AP underwent a quasi-reversible redox reaction with higher anodic current at ZIF67–OMC modified electrode compared with the bare glassy carbon electrode (GCE). In optimal condition, the ZIF67–OMC/GCE was stable, reproducible and had a linear range of 0.05–100 μmol·L −1 AP concentration, with the detection limit of 20 nmol·L −1 (signal-to-noise of S / N = 3). In addition, the prepared sensing platform for the detection of AP was evaluated for the compound paracetamol tablets and urine samples. Graphic abstract
研究领域:
材料科学
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分析化学
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医学检测
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2020
·Vol. 167
·期 6
·067504
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IF 3.721
Jing Tang,Renhao Liu,Jie Li,Zhenzhen Hui,Shengbiao Zheng,Jiwei Wu,Jiahao Guo,Xuchun Wang,Jianfei Wang
A Co-containing zeolitic imidazolate framework (ZIF-67) and ordered macroporous carbon (OMC) composite has been made via in situ growing ZIF-67 in the suspension of OMC. Different sizes of ZIF67-OMC-x (400, 700, 1000 nm) hybrid composites were synthesis by adding different amount of polyvinyl pyrrolidone (PVP). The SEM and TEM images demonstrated that the sizes of ZIF-67 matched well with the macropores of the OMC matrix in as-prepared ZIF67-OMC-400 nm composites. The intriguing structure of ZIF67-OMC-400 hybrid composites utilized synergistic interactions between the large surface area and ordered porosity structure of ZIF-67 and the high conductivity of OMC. More importantly, ZIF67-OMC-400 was explored as a novel modifying material for fabricating electrochemical sensor and then was utilized successfully for catechol (CC) and hydroquinone (HQ) simultaneous detection. Under the optimized condition, wide linear responses of this sensor were obtained for HQ and CC detection in the range of 0.1 μM to 100 μM. The modified electrode was successfully demonstrated for real samples such as river water with satisfactory results.
研究领域:
材料科学
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
CATALYSIS TODAY
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2017
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IF 4.636
Lan-Lan Lou,Ting Yang,Wenjun Yu,Huaxin Qu,Yajun Feng,Hao Li,Kai Yu,Shuangxi Liu
Pt nanoparticles supported on three-dimensionally ordered macroporous carbon (Pt/3DC) were prepared and applied as catalyst after chirally modified with cinchonidine for the enantioselective hydrogenation of ethyl pyruvate. The catalyst was characterized by SEM, TEM, powder XRD, N 2 sorption , and CO chemisorption , which confirmed the well-defined periodic macroporous structure of Pt/3DC and the high dispersion of Pt nanoparticles on the support. High catalytic performance was achieved over chirally modified Pt/3DC catalyst in the asymmetric hydrogenation of ethyl pyruvate. A high turnover frequency of 11,800 h −1 with an enantiomeric excess of 79.5% was acquired in acetic acid. In particular, this catalyst exhibited high durability in the asymmetric hydrogenation system and could be easily reused at least 13 times with well-maintained catalytic activity and slightly decreased enantioselectivity. Moreover, the comparison of catalytic performance between Pt/3DC and commercial Pt/C as well as Pt/Al 2 O 3 was carried out.
研究领域:
催化化学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
THIN SOLID FILMS
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2013
·
IF 1.604
Yang Chen,Yajuan Zhu,Zhigang Chen
Three-dimensional ordered macroporous carbon (3DOM-C) was synthesized through polystyrene (PS) colloidal crystal templates using carbonized glucose solutions as a carbon source and sulfuric acid as a dehydrating agent. The obtained samples were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM) and nitrogen-sorption isotherm measurement. SEM results showed that the layers of the PS templates were hexagonal close-packed with a large surface area, and the diameter of the PS microspheres was 300–320 nm. SEM and TEM results demonstrated that the 3DOM-C displayed a unique structure of a well-developed 3D-interconnected ordered macroporous framework with a pore diameter of 260–280 nm. The photovoltaic current voltage curves showed that the dye sensitized solar cells (DSSC) fabricated by the 3DOM-C as a counter electrode exhibited an energy conversion efficiency ( η = 2.91%), a short circuit current ( J sc = 9.51 mA/cm 2 ), an open circuit voltage ( V oc = 0.59 V) with a fill factor ( FF = 52%), which were much closed to those of Pt counter electrode-based DSSC (3.59%, 10.05 mA/cm 2 , 0.59 V, 58%) and better than those of activated carbon-based one. Moreover, the electrochemical impedance spectroscopy analysis demonstrated a low charge-transfer resistance ( R CT ) for 3DOM-C (3.48 Ω cm 2 ), which was close to that of Pt (1.54 Ω cm 2 ), and much lower than that of activated carbon (15.05 Ω cm 2 ). Finally, the 3DOM-C showed a comparable efficiency compared to a conventional Pt counter electrode.
研究领域:
材料科学
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能源科学
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产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2021
·
IF 4.464
Shuang Dong,Zhou Yang,Baoliang Liu,Jintao Zhang,Peng Xu,Meng Xiang,Tong Lu
The research and develpoment of biomass waste derived carbon materials have attracted tremendous research interests in fabrication of high performance electrochemical sensors. In this work, noble metal NPs (i.e., Pd, Au and Ag) loading on Loofah sponge-derived well-ordered macroporous carbon (OMC)/ N -doped carbon thin layer (N-C) was designed by a general approach. This polydopamine (PDA)-based method has the advantages of simplicity, high efficiency and versatility. In virtue of the synergistic contribution from 3D macroporous carbon scaffold and highly active nobel metal NPs, these as-prepared Pd@OMC/N-C, Au@OMC/N-C and Ag@OMC/N-C electrode exhibit excellent electrochemical sensing performances for H 2 O 2 reduction, glucose oxidation and nitrite oxidation, respectively. Thus, 3D OMC/N-C loaded noble metal nanoparticles are promising materials for a wide spectrum of electrochemical sensor and biosensor applications.
研究领域:
材料科学
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电化学
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生物传感
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）