APPLIED CATALYSIS A-GENERAL
·
2024
·
IF 4.7
Yuqi Li,Yue Zhang,Zhiyuan Wang,Chengxu Zhang,Fanming Meng,Jianqiang Zhao,Xinpei Li,Jue Hu
Metal-Organic Frameworks (MOFs) materials with unique properties have attracted much attention in various fields. However, the limited number of active sites and the time-consuming synthesis process hinder their widespread application. Herein, this work demonstrates the first preparation of highly efficient and stable MOF (Fe-MOF-U) catalysts with enhanced specific surface area , morphology and active sites, through ultrasonic-assisted solvothermal method for oxygen evolution reaction (OER) electrocatalysis . The results show that the crystal size of Fe-MOF-U decreases significantly, and the specific surface area and pore size increase. In addition, many oxygen vacancies are produced in the crystal, making the reaction intermediates easier to form and thus improving the catalyst's oxygen evolution performance. The overpotential of Fe-MOF-U catalyst at 10 mA cm −2 is 221 mV, which is lower than that of the conventional solvothermal synthesized Fe-MOF-S (237 mV). Furthermore, the turnover frequency of the Fe-MOF-U catalyst is 3.32 s −1 at the overpotential of 300 mV, which is 5 times higher than that of Fe-MOF-S (0.70 s −1 ). In situ Raman and methanol molecular probe tests indicate a weakened adsorption of *OH on the Fe-MOF-U surface. DFT calculations are consistent with the characterization results, both proving that the ultrasonic-assisted solvothermal method can generate specific oxygen vacancy (μ 3 -O defect) in Fe-MOF-U which improved OER performance. This study provides a new idea for the morphology controlling and defect introduction of MOF and a new approach for its application.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Materials Today Sustainability
·
2025
·
IF 7.9
Haoran Li,Qisong Yi,Yuanchao Shao,Haimei Xu,Zichun Wang,Yuanshuai Liu
The sustainable transformation of renewable biomass into value-added chemicals is essential to addressing global environmental and energy challenges. Among these, the production of 5-hydroxymethylfurfural (HMF) from biomass-derived glucose is of considerable interest for both scientific and industrial applications. In this study, mesoporous aluminium incorporated MCM-41 catalysts (Al-MCM-41) were synthesized using an ultrasonic-assisted method at room temperature. Their ordered mesoporous structure was preserved even with high concentrations of Al. The catalysts' acidity was finely tuned by varying the Si/Al ratio, enabling the development of an optimal catalyst to enhance the glucose-to-HMF conversion via Brønsted and Lewis acid catalysis. Characterization techniques, including XRD, TEM, N 2 adsorption-desorption, NH 3 -TPD, Py-FTIR, 29 Si and 27 Al MAS NMR, were employed to evaluate the catalysts’ structure and acidity. The results revealed that ultrasonic-assisted synthesis strategy improves Al dispersion, optimizes acid site density, and significantly enhances HMF yield and selectivity. The best-performing Al-MCM-41-10 catalyst can afford ∼90 % glucose conversion with ∼60 % HMF selectivity at 160 °C, and displays excellent reusability under the applied reaction conditions. This study provides valuable insights into designing efficient catalysts for biomass conversion and underscores the broad applicability of the ultrasonic-assisted synthesis method for other heteroatom-doped mesoporous materials, such as Sn-MCM-41.
研究领域:
催化化学
·
生物质能
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2022
·Vol. 12
·期 55
·35517-35530
·
IF 4.036
Ziguang Zheng,Xiaomei Jiang,Xiaowei Yang,Min Ma,Siping Ji,Fengzhi Jiang
The metal or metal clusters and organic ligands are relevant to the selectivity and performance of phosphate removal in MOFs, and the electron structure, chemical characteristics, and preparation method also affect efficiency and commercial promotion. However, few reports focus on the above, especially for 2D MOF nanomaterials. In this work, two 2D Ln-TDA (Ln = La, Ce) nanosheets assembled via microwave- and ultrasonic-assisted methods are employed as adsorbents for phosphate (H2PO4−, HPO42−) removal for the first time. Their microstructure and performance were characterized using XRD, TEM, SEM, AFM, FTIR, zeta potential, and DFT calculations. The prepared 2D Ln-TDA (Ln = La, Ce) nanosheets exposed more adsorption sites and effectively reduced the restrictions of mass transfer. Based on this, the Langmuir model was employed to estimate the maximum adsorption capacities of the two kinds of nanosheets, which reached 253.5 mg g−1 and 259.5 mg g−1, which are 553 times and 3054 times larger than those for bulk Ln-TDA (Ln = La, Ce), respectively. Additionally, the kinetic data showed that the adsorption equilibrium time is fast, approximately 15 min by the pseudo-second-order model. In addition, the prepared products not only have a wide application range (pH = 3–9) but also offer eco-safety in terms of residuals (no Ln leak out). Based on the XPS spectra, FTIR spectra and DFT calculations, the main adsorption mechanisms included ligand exchange and electrostatic interactions. This new insight provides a novel strategy to prepare 2D MOF adsorbents, achieving a more eco-friendly method (microwave- and ultrasonic-assisted synthesis) for preparing 2D Ln-based MOF nanosheets by coordinative unsaturation to boost phosphate adsorption.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
DOI
PubMed
高影响因子
ULTRASONICS SONOCHEMISTRY
·
2016
·
IF 4.556
Da-wei Zhang,Yu-min Zhang,Jing Li,Tian-qi Zhao,Qiang Gu,Feng Lin
An efficient synthesis of 1,4-disubstituted 1,2,3-triazole derivatives was studied. 1,4-Disubstituted 1,2,3-triazoles containing isoxazole and thymidine structures were synthesized in 84–96% yields starting from various terminal isoxazole ether alkynes and β -thymidine azide derivatives via a 1,3-dispolar cycloaddition using copper acetate, sodium ascorbate as the catalyst under ultrasonic assisted condition. All the target compounds were characterized by HRMS, FT-IR, 1 H NMR and 13 C NMR spectroscopy. Furthermore, the quorum sensing inhibitory activities of synthesized compounds were evaluated with Chromobacterium violaceum ( C. Violaceum CV026) based on their inhibition of violacein production, with compound C 10 -HSL as a positive control. The compounds 8a , 8c and 8f exhibited considerable levels of inhibitory activity against violacein production, and IC 50 values were 217 ± 19, 223 ± 20 and 42.8 ± 4.5 μM, respectively, which highlighted the potential of these compounds as lead structures for further research towards the development of novel QS inhibitors.
研究领域:
有机化学
·
药物化学
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微生物学
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2021
·Vol. 37
·期 3
·668-673
·
IF 1.307
Feng Fan,Li Jing,Zhang Zhihui,Fu Jiaxu,Zhang Yumin,Gu Qiang
A n ultrasonic-assisted synthesis of bis-isoxazole derivatives was developed. Eight 3-(6-chloropyridin-3-yl)-5-{[(3-arylisoxazol-5-yl)methoxy]methyl}isoxazoles were synthesized by 1,3-dipolar cycloaddition reaction between substituted isoxazolyl alkyne compounds and 6-chloro- N -hydroxynicotinimidoyl chloride. The structures of the synthesized compounds were confirmed by HRMS, FTIR, 1 H and 13 C NMR spectroscopy. Wherein, the antifungal and antibacterial activities of target compounds were tested. The synthesized compounds 6 a and 6 h exhibited better antifungal activity in comparison with the standard drug itraconazole. The minimum inhibitory concentrations(MICs) of both compound 6 a and compound 6 h were both 4 µg/mL against Candida albicans ATCC 10231.
研究领域:
有机化学
·
药物化学
·
微生物学
✓ 已验证
DOI
高影响因子
ULTRASONICS SONOCHEMISTRY
·
2022
·
IF 9.336
Mofei Shen,Jianwei Zhou,Mohamed Elhadidy,Yunlei Xianyu,Jinsong Feng,Donghong Liu,Tian Ding
Cyclodextrin metal–organic framework by ultrasound-assisted rapid synthesis for caffeic acid (CA) loading and antibacterial application (U-CD-MOF) was successfully studied and this method shortened the preparation time to a few minutes. It was found that the ultrasonic power, reaction time and temperature would affect the morphology and size of the obtained crystal. Under the optimal conditions, U-CD-MOF had a cubic structure with uniform size of 8.60 ± 1.95 μm. U-CD-MOF was used to load the antibacterial natural product CA to form the composite ( [email protected] ) and the loading rate of [email protected] to CA could reach 19.63 ± 2.53%, which was more than twice that of γ-CD. Various techniques were applied to characterize the synthesized crystal, including Powder X-ray diffraction (PXRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), and N 2 adsorption. In addition, antibacterial tests were performed on the obtained crystal. The minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) of [email protected] for Escherichia coli O157: H7 ( E. coli O157: H7) were both 25 mg·mL −1 , and the MIC for Staphylococcus aureus (S. aureus) . was 25 mg·mL −1 . The sustained release behavior of [email protected] to CA in ethanol fitted well to Higuchi model and the loading of CA was supported by molecular docking results. In general, U-CD-MOF was successfully achieved by ultrasound-assisted rapid synthesis and the obtained crystal was further evaluated for potential antibacterial application.
研究领域:
材料科学
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生物学
·
药学
✓ 已验证
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2021
·
IF 2.495
Ying-yue Qin,Qiao-ying Wang,Jin-Long Ge,Fang Wu
Amino-MIL-53(Al) (NH 2 -MIL-53(Al)) nanocrystals were successfully obtained through microwave ultrasound-assisted method. The structure and morphology of the as-synthesized NH 2 -MIL-53(Al) nanocrystals were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy and N 2 adsorption–desorption isotherms, respectively. Upon excitation at 388 nm, the as-synthesized NH 2 -MIL-53(Al) nanocrystals show strong emission peak at 454 nm in n-octane solution at room temperature. Meanwhile, the fluorescence explorations revealed that NH 2 -MIL-53(Al) can selectively detect organosulfur compounds, including thiophene and benzothiophene through quenching effect in model fuel, with high quenching constant and low detection limit. This work presents a facile platform for the detection of organosulfur compounds in model fuel.
研究领域:
材料科学
·
化学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 6
·3246-3255
·
IF 3.119
Guolang Zhou,Jingzhou Yin,Zechun Sun,Xiaoliang Gao,Fengxia Zhu,Pusu Zhao,Rongqing Li,Jiaying Xu
Biomass porous carbon materials are ideal supercapacitor electrode materials due to their low price, rich source of raw materials and environmental friendliness. In this study, an ultrasonic-assisted method was applied to synthesize the rice-straw-based porous carbon (UPC). The obtained UPC exhibited a two-dimensional structure and high specific surface area. In addition, the electrochemical test results showed that the UPC with a 1 hour ultrasonic treatment and lower activation temperature of 600 °C (UPC-600) demonstrated optimal performance: high specific capacitances of 420 F g−1 at 1.0 A g−1 and 314 F g−1 at a high current of 10 A g−1. Significantly, the symmetric supercapacitors showed a high energy density of 11.1 W h kg−1 and power density of 500 W kg−1. After 10 000 cycles, 99.8% of the specific capacitance was retained at 20 A g−1. These results indicate that UPC-600 is a promising candidate for supercapacitor electrode materials.
研究领域:
材料科学
·
环境科学
·
能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2022
·
IF 9.221
Bingsheng Du,Fanfan Yan,Xiaohui Lin,Chengyao Liang,Xuezheng Guo,Yiling Tan,Hao Zhen,Chengjiu Zhao,Yijie Shi,Evans Kibet,Yong He,Xi Yang
Two-dimensional metal-organic framework nanosheets , as a new member of the two-dimensional family, are attracting increasing research interest in various fields. Herein, a uniform two-dimensional Zn-BTC MOF nanosheet with a thickness of 14 ± 2 nm was synthesized through a simple, efficient, and scalable sonication-assisted bottom-up strategy. The ZnO nanoparticles were used as the Zn source, which can be corroded by H 3 BTC to form Zn-BTC MOFs under sonication conditions. The morphologies of Zn-BTC MOFs can be modulated from nanosheets to nanorods by changing the content of H 3 BTC. The crystal growth process is dominated by the thermodynamics of sonication and the stoichiometric ratio of the generated Zn 2+ and H 3 BTC, and the crystal growth mechanism was elaborated by the oriented attachment. Consequently, a chemiresistive gas sensor based on Zn-BTC nanosheet derivatives was fabricated to detect ppb-level acetone . Notably, the experimental detection limit of concentration could reach as low as 100 ppb of acetone due to the functional surface, and the dynamic response linearity reached 99 %. Our work explored a new method of synthesizing two-dimensional Zn-BTC MOF, and the fabricated gas sensing device demonstrated promising potential in gas sensing fields.
研究领域:
材料科学
·
化学
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2025
·Vol. 30
·期 3
·466
·
IF 4.6
Xianlu Lei,Shuang Li,Jian Zeng,Meiqi Huang,Miaomiao Ma,Xueyan Ran,Xiang Chen,Yuting Yin,Qi Sun,Tao Le
Zinc oxide (ZnO) semiconductors are renowned for their cost-effective synthesis and superior catalytic attributes, making them prominent in environmental remediation applications. This study presents the synthesis of ZnO nanoparticles (NPs) with distinct morphologies, achieved by modulating citric acid concentrations in an ultrasonic-assisted hydrothermal process. The photocatalytic efficacy of these ZnO NPs in degrading malachite green (MG), a persistent environmental pollutant, was thoroughly investigated. Our findings reveal a strong correlation between the morphological features of ZnO catalysts and their photodegradation performance. Among the synthesized NPs, the chrysanthemum-shaped ZnO (denoted as USZ-0.1) demonstrated exceptional photocatalytic activity, attributed to its enhanced surface area and optimized nano-crystal aggregation. This structure facilitated the generation of a higher concentration of reactive oxygen species, leading to over 96.5% degradation of MG within 40 min under simulated sunlight in an acidic medium. This study underscores the potential of morphological manipulation in enhancing the photocatalytic properties of ZnO NPs for environmental applications.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MATERIALS & DESIGN
·
2015
·
IF 3.501
Chen Hao,Yinglu Yang,Yuru Shen,Feng Feng,Xiaohong Wang,Yutao Zhao,Cunwang Ge
The graphene (G)–ZnO (G–ZnO) nanocomposites with high photocatalytic activity have been successfully prepared by a simple and inexpensive liquid phase-based ultrasonic-assisted method with different doping amounts of graphene oxide . The as-prepared products were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy , UV–visible diffuse reflectance spectroscopy (UV–vis/DRS) and Brunauer–Emmett–Teller (BET) analysis. The results indicate that the assistance of ultrasonic can effectively decrease the size of ZnO nanostructure and increase the uniformity of the mixture of graphene and ZnO particles. Meanwhile, the sunlight absorption of the G–ZnO nanocomposite is gradually improving with the increase of the ratio of graphene. The obtained G–ZnO-30 photocatalyst shows the best photocatalytic activity for methylene blue (MB) and methyl orange (MO) under sunlight irradiation. The degradation rates of MB and MO in the presence of G–ZnO-30 reached up to 98.1% and 95.7%, respectively, under solar radiation for 1 h and 6 h. In addition, the photocatalyst exhibits outstanding separability and high stability.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Sustainable Energy & Fuels
·
2021
·Vol. 5
·期 4
·1095-1102
·
IF 6.367
Fen Li,Jinxia Li,Lihui Zhou,Sheng Dai
Metal–organic frameworks (MOFs) have recently emerged as one of the most promising electrocatalysts for oxygen evolution reaction (OER) due to their abundant metal sites and porous structures. However, the limited modulation of the single-metal sites of MOF-based catalysts restricts further promotion of their catalytic performance. In this work, we have developed a composite Co–Fe-based MOF catalyst based on Co–BDC (1,4-benzenedicarboxylate) and Fe–BDC, which modulated the electronic structure via the construction of the heterogeneous interfaces of Co–BDC and Fe–BDC. Enhanced OER performance was achieved in the composite Co–Fe–BDC catalyst, far more exceeding that of the counterpart Co–BDC or Fe–BDC. In addition, it was found that additional ultrasonic treatment effectively facilitated the dispersion of Fe–BDC on Co–BDC, as compared to the composited MOF obtained via physical mixture or magnetic stirring. The composite Co–Fe–BDC catalyst prepared via the ultrasonic-assisted one-pot synthesis exhibited an overpotential of 295 mV at a current density of 10 mA cm−2, which was even superior to that of the commercial RuO2 catalyst, while holding a lower cost and excellent stability. Insights gained in this study may shed new lights on heterogeneous interfaces and composition strategy of MOF-based electrochemical catalysts.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
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