Journal of Inorganic and Organometallic Polymers and Materials
·
2024
·
IF 3.9
Pang Wanyu,Gao Yali,Chang Xile,Du Guodong,Hu Zhiyong,Hu Tuoping,Ma Xuemei
An ultra-sensitive paper-based sensor for the rapid and specific detection of apigenin in Scutellaria barbata D. Don was developed. The construction process of the proposed apigenin sensor was to grow ZIF-8 in situ with MXene as a template on carbon paper (CP) electrode. The MXene with excellent conductivity and ZIF-8 with porous structure showed synergistic effect in promoting electron transfer and increasing the number of binding sites, thus providing a highly sensitive detection for apigenin. Under optimal conditions, the sensor showed an excellent linear relationship in the range of 0.01 to 10 µM, with a detection limit of 2.6 nM. This study not only constructed a new sensing platform for sensitive detection of apigenin, but also provided a new method for the detection of apigenin in Scutellaria barbata D. Don, which was of great significance for promoting the construction of an electrochemical sensor for apigenin.
研究领域:
分析化学
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植物化学
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电化学传感器
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2016
·
IF 3.15
Xiancheng Ma,Liqing Li,Shaobin Wang,Mingming Lu,Hailong Li,Weiwu Ma,Tim C. Keener
A porous carbon (ZC) was prepared at 900 °C using zeolitic imidazolate framework-8 (ZIF-8) as a solid template for CO 2 adsorption. The ZC was further treated by ammonia functionalization to improve CO 2 uptake. The textural and surface characteristics of ZC samples were determined by X-ray diffraction (XRD), N 2 adsorption, Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). It was revealed that ammonia treatment at 600 °C considerably enhanced the specific surface area and N-content of ZC. However, the pyrrolic-N group was decreased, yet the pyridinic-N group was increased with an increased temperature. The pyrrolic-N significantly enhanced CO 2 adsorption. The ammonia treatment, on the one hand, increases the alkalinity of ZC sample and the base–acid interaction between N-containing functional groups with CO 2 . On the other hand, the ammonia treatment increased pyrrolic-N group (NH) into carbon surface facilitating the hydrogen-bonding interactions between proton of pyrrolic-N and CO 2 molecules.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF CATALYSIS
·
2022
·
IF 8.047
Jinxiao Ba,Hui Cheng,Zhenhan Li,Xianghai Yu,Aiying Song,Chengqun Xu,Donghua Fan,Shengye Jin
In this work, we develop Ni/Ni 3 S 2 /CdS composite photocatalytic system from annealing of CdS nanosphere coated Ni-ZIF by simple solvothermal method. The Ni/Ni 3 S 2 /CdS synthesized after calcination at 700 °C exhibits the best hydrogen evolution performance with an average hydrogen evolution rate of 2104.02 μmol/g/h, which is 152 times higher than that of pure CdS, and external quantum efficiency is 41.9% (λ = 420 nm). Using a series of characterization methods, we revealed that CdS is the photosensitizer, Ni is the catalytic active species, and Ni 3 S 2 formed between Ni and CdS formation plays an important role in charge separation as confirmed by time resolved emission spectroscopy. In addition, the regulation of Ni loading is achieved by changing the annealing time and the molar ratio of Ni salt to CdS. These results demonstrate that Ni/Ni 3 S 2 /CdS is a favorable photocatalyst for efficient photocatalytic hydrogen evolution.
研究领域:
材料科学
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能源化学
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 47
·e53193
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IF 3.057
Xiuzhou Lin,Qiang Peng,Song Duan,Chunjiang Zhang,Xulei Chen,Zhiqiang Deng,Baojie Dou,Yingjun Zhang,Xiulei Gao,Zhiwen Fang
In this study, ZIF-8 modified fluorinated graphene composite (FG@ZIF-8) was innovatively prepared and used as a novel functional filler to improve the anticorrosion performance of epoxy coating on Q235 carbon steel. The morphology and structure of FG@ZIF-8 composites were characterized by scanning electron microscopy (SEM), x-ray powder diffractometer (XRD), Fourier transform infrared spectrometer (FT-IR), and x-ray photoelectron spectroscopy (XPS) tests. The results showed that the structure and morphology of the composites largely depended on the composition ratio of FG and ZIF-8. The mechanical properties and corrosion resistance of FG@ZIF-8 modified coatings were also investigated. The unique two-dimensional sheet structure and insulation of FG in the FG@ZIF-8 filler can not only inhibit the penetration of corrosive media but also discourage electron migration effectively on the interface of coating/matrix during the electrochemical reaction. Meanwhile, the chemical cross-linking between the amine groups in ZIF-8 and the epoxy group increases the degree of densification of the coatings. Besides, the 2-methylimidazole from the dissolution of ZIF-8 on FG@ZIF-8 will also inhibit the corrosion reaction. These advantages endow the FG@ZIF-8 modified epoxy coatings an excellent long-term corrosion resistance. Our findings may inspire the development of new graphene-based materials with superior protective properties for metallic materials.
研究领域:
材料科学
·
腐蚀与防护
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产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Yali Zhao,Xitai Cai,Wufeng Wu,Libo Li,Yanying Wei,Haihui Wang
Metal-organic framework membranes have shown great potential for efficient separation applications. However, unavoidable grain boundary defects and the inconstant pore size due to framework flexibility hinder the application of MOF membranes for gas separation. Herein, low-crystallinity ZIF-8/dcIm-x membranes are synthesized via fast current-driven synthesis. The competitive coordination of 4,5-dichloroimidazole (dcIm) linker leads to the formation of a low-crystallinity MOF with reduced grain boundary defects for better gas separation performance. Meanwhile, the in-situ substitution of the mIm linker by dcIm narrows the pore size and transforms the ZIF-8 structure in the stiffened Cm polymorph, allowing precise CO 2 sieving. Consequently, the low-crystallinity ZIF-8/dcIm-14 membrane exhibits a promising CO 2 /CH 4 selectivity of 32.4 with a CO 2 permeance of 1.73 × 10 −8 mol m −2 s −1 Pa −1 , which surpasses other membranes. Furthermore, the membrane presents a remarkable pressure resistance up to 3 bar and stable temperature-swing operation between room temperature and 125 °C over 120 h.
研究领域:
材料科学
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化学工程
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膜技术
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DOI
高影响因子
LWT-FOOD SCIENCE AND TECHNOLOGY
·
2022
·
IF 6.056
Lei Zhang,Ziyuan Wang,Yi Jiao,Zichen Wang,Xiuming Tang,Zhanxin Du,Zeyang Zhang,Shihai Lu,Changsheng Qiao,Jiandong Cui
Recent years, biobased polymer packaging film in food packaging has witnessed great developments. However, it is still a challenge to develop biodegradable packaging films with antimicrobial property and mechanical strength. Herein, agar and polyvinyl alcohol (PVA)/Chitosan (CS) packaging films with ε-polylysine/ZIF-L nanocomposites (ε-PL@ZIF-L) were developed for the first time. Due to the incorporation of the nanocomposite, UV/visible light barrier properties (the transmittance decreased by 10.9%) of the films were improved, and the elongation at break of the composite agar films were increased by 43.0%. In the antimicrobial assays, with 4% ε-PL@ZIF-L, the inhibition zone diameters against Bacillus subtilis were 10 times as compared with the pure PVA/CS film. Furthermore, compared with commercial PE film, agar films and PVA/CS films with 4% ε-PL@ZIF-L nanocomposites could provide long-term protection for strawberry to avoid the microbial infection and prolong the shelf life of the fruit at 25 °C. The results suggested that the agar and PVA/CS packaging films with ε-PL@ZIF-L nanocomposites could significantly behave as potent antibacterial material in food packaging and preservation systems.
研究领域:
食品科学
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材料科学
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生物技术
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产品关联
DOI
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 7
·1142
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IF 5.719
Mei Wan,Congling Shi,Xiaodong Qian,Yueping Qin,Jingyun Jing,Honglei Che
In this work, a novel functionalization strategy for ZIF-67-modified layered MXene was proposed, aiming at improving the fire safety of thermoplastic polyurethanes (TPU). The ZIF-67@MXene was verified by microscopic morphology, elemental composition, functional group species and crystal structure, and then the successfully prepared ZIF-67@MXene was introduced into the TPU material. When ZIF-67@MXene content was only 0.5 wt%, the peak heat release rate, total heat release rate, peak smoke release rate, total smoke release rate, and CO yield of the TPU/ZIF-67@MXene composites were reduced by 26%, 9%, 50%, and 22%, respectively, compared with the pure TPU. The thermogravimetric tests showed that the residual char of TPU/ZIF-67@MXene composites was the most in all samples. In short, the high-quality carbon layer of TPU/ZIF-67@MXene composites acts as a physical barrier to the transfer of heat and toxic gases, greatly improving the flame retardant properties of the TPU polymer.Keywords:metal-organic framework ZIF-67;MXene;fire safety;thermoplastic polyurethanes
研究领域:
材料科学
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高分子科学
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防火工程
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产品关联
DOI
PubMed
高影响因子
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
·
2019
·Vol. 2019
·期 46
·4920-4926
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IF 2.578
Kaixuan Zhao,Jinxin Guo,Huiying Wei,Yanzhao Yang
Graphical A new coordination method for the preparation of hollow bimetallic oxides is proposed. The unsaturated ligands of ZIF-67 were combined with the second metal ions by ultrasound, and then calcined to form a hollow bimetallic hollow nanoboxes. This method can be applied to Cu II , Fe III , Ni II and other metal ions. Bimetallic hollow nanomaterials which are composed of two different metal/metal oxide materials show great potentials owing to their unique structural features. Here, the second metal ions were introduced into the surface of ZIF-67 by ultrasonication to form bimetallic hollow complexes, and the coordination between the second metal ions and ZIF-67 colloidal crystals are further investigated. A series of bimetallic complexes has been synthesized by incorporating Fe III , Cu II and Ni II into the coordinating block of ZIF-67. After calcination in oxygen, these as-prepared transformed to Fe/Cu/Ni doped Co 3 O 4 hollow nanoboxes. We found a facile and general method to form bimetallic complexes by complexing the second metal ions with ZIF-67 surface ligands and calcining to form bimetallic hollow nanoboxes.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2019
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IF 5.107
Bingchen Chen,Chao Wan,Xueting Kang,Mingqing Chen,Chunfang Zhang,Yunxiang Bai,Liangliang Dong
In this study, a facile and scalable in situ growth method was used to synthesize ZIF-8@GO composites. The obtained ZIF-8@GO were blended with a CO 2 -philic, comb copolymer yielding a series of mixed matrix membranes (MMMs), which were evaluated for their performance in separation of CO 2 /N 2 . The effect of reaction time for ZIF-8@GO composites on gas separation performance was systematically investigated. Pure and mixture gas permeation tests indicated that MMM with ZIF-8@GO by in situ growth for 6 h exhibited the largest improvement (CO 2 permeability: 475 Barrer and CO 2 /N 2 selectivity: 58.2) compared with pure polymers, with the overall CO 2 /N 2 separation performance exceeding the 2008 polymer upper bound. Our strategy that the in situ growth of ZIF-8 on GO provides an effective way to design MMMs with well filler dispersion, structural features and separation performance.
研究领域:
材料科学
·
环境工程
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DOI
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Shengyao Zhou,Xiangbin Zou,Yongsheng Yu,Bing Li
Electrochemical reduction of CO 2 into value-added chemicals is a promising way for carbon neutrality while hindered by the low activity and selectivity of electrocatalysts. Herein, a ZIF-8 modified silver nanowire (AgNW) was contracted and used as an efficient electrocatalyst for CO 2 reduction. The optimized ZIF-8/AgNW catalyst exhibited high CO selectivity with a faradic efficiency of CO (FE CO ) > 93% within the −1.0 to −1.3 V versus the reversible hydrogen electrode (RHE). It also achieved a high CO partial current density of 13.3 mA·cm −2 and demonstrated good stability over 10 hours in KCl electrolyte. Electrochemical results suggested that the synergistic effect between AgNWs and ZIF-8 enhanced the catalytic performance. Moreover, KCl as an electrolyte was found to be superior to KHCO 3 for the ZIF-8/AgNW catalyst.
研究领域:
材料科学
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环境科学
·
电化学
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产品关联
DOI
高影响因子
Journal of Inorganic and Organometallic Polymers and Materials
·
2022
·Vol. 32
·期 7
·2371-2383
·
IF 3.518
Dai Xiaojun,Feng Sheng,Wu Wei,Zhou Yun,Ye Zhiwei,Wang Yang,Cao Xun
To improve the photocatalytic activity of Bi 2 WO 6 , ZIF-8 was successfully introduced with the in-situ growth for the first time. The addition of ZIF-8 effectively inhibited the recombination of photogenerated electron–hole pairs with further improved electron utilization efficiency. The superoxide anion, .O 2 − , generated, greatly improved the photocatalytic activity. The performance of Bi 2 WO 6 /ZIF-8 in the photodegradation of tetracycline (TC) was studied under different conditions, including the proportions of ZIF-8, the dosage of catalyst, and the concentration of TC. The results indicated that 10 mg of B/Z/5/1 offered the best photocatalytic activity under UV light, achieving 97.8% degradation of TC (20 mg/L) within 80 min. The measured rate constant (k) for TC degradation was almost 3 times that of pure Bi 2 WO 6 . The effects of pH, HA, and inorganic anions on the degradation of TC were also studied for the simulated real water. Further, B/Z/5/1 could be reutilized up to five cycles without reduction of the catalysis performance. Therefore, the Bi 2 WO 6 /ZIF-8 heterojunction composite material can be utilized as an efficient photocatalyst for remediation of environmental pollution.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Peiyun Shu,Zhe He,Gentian Yue,Yueyue Gao,Jinghao Huo,Chen Dong,Furui Tan
The application of zeolite imidazole salt metal organic frameworks (ZIFs) and layered double hydroxides (LDHs) as bimetallic materials for supercapacitor electrodes is extensive, however, their inherent limitations hinder broader usage in supercapacitors. In this work, we developed a ZnNi-ZIF/LDH composite with a honeycomb structure through a sequential process involving ion doping and hydrolysis, utilizing ZIF-8 as a template to achieve a nanoscale honeycomb architecture. Subsequent phosphorization treatment yielded ZnNi-ZIF/LDH@P composite, further improving its conductivity. This process significantly enhanced the capacitive performance and stability of the composite electrode. The ZnNi-ZIF/LDH@P composite electrode revealed an excellent specific capacitance of 2855 F·g −1 at a current density of 2 A·g −1 , maintaining an impressive 93.4 % capacitance retention after 6000 charge-discharge cycles at a current density of 15 A·g −1 . The assembled ZnNi-ZIF/LDH@P//AC asymmetric supercapacitor was capable of powering a HENU light panel for at least 2 min, and its specific capacitance remained 96.4 % of the initial value after 4000 cycles at a current density of 5 A·g −1 . Overall, the ZnNi-ZIF/LDH@P composite demonstrates outstanding capacitance performance, highlighting its great potential in the field of energy storage.
研究领域:
材料科学
·
能源存储技术
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）