FUEL
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2024
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IF 6.7
Mingyu Liao,Miaomiao Zheng,Gexian Li,Xiaolin Pi,Yuanjie Xiao,Linfeng Zhang,Huadong Wu,Jia Guo
The desulfurization of fuels is a crucial step in the production of clean energy. The design of metal–organic frameworks (MOFs) with bimetallic active sites is a new way to achieve deep oxidative desulfurization (ODS). Traditional methods for synthesizing MOFs involve high temperatures and pressures, which can be hazardous. Oil bath heating provides a safer and more convenient way to synthesize catalysts at a slower heating rate with full uniform heating. In this work, a series of La-doped bimetallic PCN-777(La-Zr) catalysts were synthesized by heating in an oil bath. The microstructures of the catalysts were investigated using various techniques, such as XRD, FT-IR, Raman, BET, SEM, TEM, etc. Compared with PCN-777(H) synthesized by hydrothermal method, PCN-777(O) synthesized by oil-bath heating exhibits a higher specific surface area (2017.01 m 2 /g) and a more homogeneous pore size distribution. PCN-777(0.2La-Zr) demonstrated outstanding catalytic performance in ODS of dibenzothiophene (DBT), which could remove 100 % of DBT within 40 min at 60 ℃ and still exhibited high desulfurization efficiency after 12 cycles. The outstanding catalytic ability of PCN-777(0.2La-Zr) should be related to the synergistic effect of its homogeneous pore channels and unsaturated metal sites. The present study exhibits that bimetallic MOFs have possible application potential in the field of ODS, and offers a novel idea for promoting the catalytic ability of ODS by catalyst synthesis in an oil bath.
研究领域:
催化材料
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能源化学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
FUEL PROCESSING TECHNOLOGY
·
2023
·
IF 7.5
Miaomiao Zheng,Shanshan Yu,Rongguang Yang,Jianbin Liu,Linfeng Zhang,Fuqing Zhang,Huadong Wu,Jia Guo
The electronic structure and hydrophobicity of heterogeneous catalysts are of great importance to catalytic performance. A novel catalyst of functionalized PCN-777-supported Lindqvist-type polyoxometalate derivatives was designed and prepared. The hydrophobicity of the catalyst was improved by simple surface modification. The catalyst was applied in the ODS of dibenzothiophene (DBT) in this study, and the support and catalyst were characterized by Fourier transform infrared (FT-IR), contact angle test , and other methods. Systematic characterization and ODS experiments further confirmed the electron-donating effect of functionalized PCN-777 (tBu-PCN-777) with high hydrophobicity on [C 12 Py] 3 (NH 4 ) 3 Mo 7 O 24. The electron-donating effect leads to a narrow bandgap and high electron density of Mo active sites, ensuring that the catalyst [C 12 Py] 3 (NH 4 ) 3 Mo 7 O 24 /tBu-PCN-777-35% exhibits excellent ODS activity. In particular, [C 12 Py] 3 (NH 4 ) 3 Mo 7 O 24 /tBu-PCN-777-35% completely removed DBT at 60 °C in 50 min, and it continued to be stable after 30 cycles. The sulfur removal efficiency of real diesel oil reached 92.26%. This study demonstrates that functionalized PCN-777 has desulfurization potential and provides new ideas for increasing ODS catalytic activity from the design of electron-donating effect and hydrophobicity.
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
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Jincan Liu,Dejin Xu,Guangchun Xu,Xiaona Li,Jiangtao Dong,Xingkun Luan,Xuezhong Du
Nanopestcides based on metal–organic frameworks (MOFs) have attracted great attention. Highly stable mesoporous metal–organic framework PCN-777 with large pores can accommodate the biologically active insecticide avermectin (AVM) of relatively large molecular dimensions. In this work, PCN-777 nanoparticles were synthesized for the creation of double-gated nanopesticides with sodium lignosulfonate (SL) and chitosan. The double gatekeepers could realize excellent sealing performance to prevent premature leakage of AVM. The double-gated PCN-777 based nanopesticides could achieve the controlled release of AVM in response to pH, laccase, phosphate, and phytic acid (PA), which are related to the physiological environments of pests and crops. The PA-triggered controlled release of loaded cargos in MOF-based delivery systems was reported for the first time. This is the first example of PCN-777 drug/pesticide delivery system and also the first case of controlled-release MOF-based AVM nanopesticides, and the mechanisms of the stimuli-responsive controlled pesticide release were clearly elucidated. The nanopesticides prevented the ultraviolet photolysis of AVM owing to the PCN-777 organic ligands and SL coating. The nanopesticides had high insecticidal efficacy and field control efficacy against the pests Spodoptera litura Fabricius on cabbage, in comparison with traditional pesticide formulations, and the nanopesticides had no influence on plant growth and showed high biosafety toward non-target organisms and human cells. The smart controlled-release nanopesticides show high potential and application prospect in ecological agriculture.
研究领域:
农业科学
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生物技术
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Zhe Sun,Yuanyuan Hui,Ding Yang,Lusha Wei,Ke Ren,Qianyi Mi,Bingqian Liu,Yiran Tian,Bini Wang
Aflatoxin M 1 (AFM 1 ) contamination in milk and dairy products poses a serious food safety concern, especially in regions with limited regulatory oversight. This study developed a zinc oxide–zirconium metal–organic framework (ZnO@PCN-777) for efficient AFM 1 removal from goat milk. The composite exhibited a high adsorption capacity of 112.87 mg g −1 . Kinetic modeling indicated that the adsorption followed a pseudo-second-order model, while isotherm analysis conformed to the Freundlich model, suggesting multilayer adsorption on a heterogeneous surface. X-ray photoelectron spectroscopy (XPS) analysis identified hydrogen bonding, π–π stacking interactions, and pore-filling effects as the primary mechanisms of AFM 1 adsorption, with their synergistic action enhancing overall efficiency. ZnO@PCN-777 maintained excellent reusability across 15 adsorption–desorption cycles. In real milk samples, adding 0.075 % ( w /w) of the adsorbent achieved a 93 % AFM 1 removal rate without affecting milk quality, demonstrating a strong potential for dairy detoxification applications.
研究领域:
食品科学与技术
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环境化学
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材料科学
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毒理学
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乳品安全
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Xiaona Li,Jincan Liu,Yue Yang,Jiangtao Dong,Xuezhong Du
Controlled-release nanopesticides based on metal–organic frameworks (MOFs) have aroused broad interests. PCN-777, the Zr-MOF with the largest mesopores, can host the bulky broad-spectrum fungicide pyraclostrobin (Pyr). Nanoscale PCN-777 was prepared and then capped with pectin and chitosan through coordination interactions and electrostatic interactions/hydrogen bonds, respectively, to create double-gated nanofungicides. The double gatekeepers had substantial capping effect to inhibit early release of Pyr. The loading capacity of Pyr reached 25.9 % due to the large mesopores of PCN-777, higher than those in other Pyr-loaded MOF nanofungicides. The smart nanofungicides achieved the pH-, pectinase-, phosphate-, phytic acid-responsive controlled release of Pyr, which is closely associated with the physiological factors of pathogens and plants, and these stimuli-responsive mechanisms were explicitly elaborated. The nanofungicides protected Pyr from UV photolysis thanks to the shielding effect of PCN-777 organic ligands. The nanofungicides showed good fungicidal activity against fungi Fusarium graminearum (wheat head blight) and control effect of wheat powdery mildew triggered by Erysiphe graminis through foliar spray and seed coating, in comparison with commercial pesticide formulations. In terms of target plant growth biosafety, the nanofungicides improved wheat seed germination, seedling emergence, and seedling height by 10 %, 13 %, and 5 %, respectively, relative to the commercial formulation. In terms of non-target organism biosafety, the median lethal concentrations of the nanofungicides toward zebrafish were 3.6–5.7 times those of the commercial formulation, besides honeybees and human normal cells. The smart controlled-release nanofungicides have good prospective applications in the sustainable increase of agricultural products.
研究领域:
农业化学
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纳米技术
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植物保护
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环境科学
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可持续农业
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）