APPLIED SURFACE SCIENCE
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2023
·
IF 6.7
Xingxing Huang,Yingzhang Shi,Cheng Liu,Zhiwen Wang,Jinhong Bi,Jimmy C. Yu,Ling Wu
A series of Cu 2 O clusters/MIL-100(Fe) heterojunctions with different Cu 2 O mass ratios were constructed as the photocatalysts for N 2 fixation. An optimal nitrogen fixation performance of 51.22 μmol·g −1 ·h −1 is achieved when the mass fraction of Cu 2 O is 20 %. Isotope analysis experiments confirmed that the nitrogen source is N 2 . Possible intermediate signals during photocatalytic reactions were detected by in situ DRIFTS. XPS results further confirm the formation of Cu 2 O/MIL-100(Fe) heterojunctions, and that the existence of Cu–O surface interactions is the key to efficient electron transfer. It is revealed that the improvement of the catalytic performance is derived from the formation of heterojunction which regulates the energy band structure as well as promotes the separation of photogenerated electron-hole pairs. This study proposes a possible mechanism of photocatalytic nitrogen fixation and emphasizes the role of surface interaction and electron transfer in type-II heterojunction in improving nitrogen fixation performance.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
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IF 2.7
Yongzhao Zhang,Xuzheng Chen,Yunlei Zhou,Tao Feng,Luping Lyu,Zhenya Zhu,Yifan Liu
The efficient transformation of glucose into 5-hydroxymethylfurfural (5-HMF) is crucial for sustainable bio-refinery processes, but achieving high production efficiency remains challenging. In this study, we presented the preparation of Al-containing metal-organic frameworks (MOFs), specifically MIL-53(Al), MIL-53(Al)-NO2, and MIL-53(Al)-NH2, using different ligands as catalysts to enhance the production of 5-HMF from glucose. Comprehensive characterization provided valuable insights into the properties of the synthesized MOFs. The synthesized MOFs exhibited varied MIL-53(Al) states, morphologies, and thermal stabilities based on the different ligands employed, which in turn affected their catalytic performance. Among the Al-containing MOFs synthesized, MIL-53(Al)-NH2 demonstrated remarkable catalytic capabilities for the conversion of glucose to 5-HMF. This MOF achieved an impressive 5-HMF yield of 53% and a reaction selectivity of 54%. The catalytic efficiency was further enhanced by leveraging the synergistic effect of MIL-53(Al)-NH2 in combination with Amberlyst-36, resulting in a 5-HMF yield of 59% and a reaction selectivity of 60%.
研究领域:
化学工程
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催化
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材料科学
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可持续化学
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DOI
高影响因子
MOLECULES
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2022
·Vol. 27
·期 7
·2288
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IF 4.927
Mengyuan Xu,Xi Li,Huiying Zheng,Jiehan Chen,Xiaohua Ye,Tiantian Liu
Nanomaterial technology has attracted much attention because of its antibacterial and drug delivery properties, among other applications. Metal-organic frameworks (MOFs) have advantages, such as their pore structure, large specific surface area, open metal sites, and chemical stability, over other nanomaterials, enabling better drug encapsulation and adsorption. In two examples, we used the common pathogenic bacteriumStaphylococcus aureusand highly infectious influenza A virus. A novel complex MIL-101(Fe)-T705 was formed by synthesizing MOF material MIL-101(Fe) with the drug favipiravir (T-705), and a hot solvent synthesis method was applied to investigate the in vitro antibacterial and antiviral activities. The results showed that MIL-101(Fe)-T705 combined the advantages of nanomaterials and drugs and could inhibit the growth ofStaphylococcus aureusat a concentration of 0.0032 g/mL. Regarding the inhibition of influenza A virus, MIL-101(Fe)-T705 showed good biosafety at 12, 24, 48, and 72 h in addition to a good antiviral effect at concentrations of 0.1, 0.2, 0.4, 0.8, 1.6, and 3 μg/mL, which were higher than MIL-101(Fe) and T-705.Keywords:MIL-101(Fe);favipiravir;antibacteria;antiviral
研究领域:
纳米技术
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药学
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病毒学
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DOI
PubMed
高影响因子
Science of Advanced Materials
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2023
·Vol. 15
·期 6
·754-760
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IF 0.9
Chen Lin,Zhang Hang,Fouad Hassan,Akhtar M. S.,Wang Zhihong
This study presents a straightforward hydrothermal synthesis technique for modifying the crystal size and shape of MIL-53(Al) via the use of a mixed solvent solution consisting of water and DMF. Without the use of coordination inhibitors or surfactants, a sequence of nanosized MIL-53(Al)
crystals was efficiently synthesized. The lowest crystal size we were able to achieve in this work was 100 nm, but present technologies are not suited to creating nanoscale crystals of this size. Large crystallinity and yield were attained, and the samples’ very large specific surface
areas expanded the usefulness of this MOF material for gas adsorption and storage. X-ray diffraction, scanning electron microscopy, thermogravimetric analysis, nitrogen gas adsorption/desorption, and infrared spectroscopy were all used to characterize the samples. Finally, the effect of moisture
concentration on crystal size and shape was investigated.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
POLYMER ENGINEERING AND SCIENCE
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2024
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IF 3.2
Wenlong Ma,Tianxu Hao,Xinya Wang,Wei Zhang,Yonggui Li,Mingxing Chen
In this paper, a high-performance composite nanofiber membrane with excellent air filtration and dye degradation properties was prepared by incorporating MIL-53(Fe) nanoparticles into the electrospinning solution. The results showed that the filtration efficiency for PM2.5 of the PP/PVDF-HFP/MIL-53(Fe) composite nanofiber membrane reached up to 99.3% with the addition of 2 wt% MIL-53(Fe). Moreover, the composite nanofiber membrane exhibited steady filtration efficiency across different parameters, including air velocity, PM2.5 concentration, and extended testing time. Furthermore, the incorporation of MIL-53(Fe) significantly enhanced the removal efficiency of the composite nanofiber membrane toward Rh B, resulting in a remarkable 91% removal rate. The polymer/MOF composite nanofiber membranes prepared by simple and cheap electrospinning technology have a wide range of practical applications in the field of environmental protection. Highlights PPM composite nanofiber membrane was prepared via electrospinning method. MIL-53(Fe) nanoparticles were introduced to PPM composite nanofiber membrane. PPM composite nanofiber membrane showed excellent removal efficiency for PM2.5. PPM composite nanofiber showed a good removal performance for RhB in solution.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
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2022
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IF 3.656
Zhipeng Zhang,Feifei Li,Guoqiang Li,Rui Li,Yunfang Wang,Yawen Wang,Xiaochao Zhang,Lulu Zhang,Fangfang Li,Jianxin Liu,Caimei Fan
The bottlenecks of photocatalytic nitrogen fixation are adsorption and activation of nitrogen, because N–N bond in dinitrogen is one of the strongest bonds in chemistry . Herein, for the first time, Cu-doped MIL-101(Fe) was applications in photocatalytic nitrogen fixation. The photocatalytic nitrogen fixation activity of Cu-MIL-101(Fe) is three times that of MIL-101(Fe). Characteristic of MIL-101(Fe) and Cu-MIL-101(Fe) are systematically compared by XRD , SEM, TEM, BET, PL and energy band structure . These results indicated that the Cu doping not only enlarge the specific surface area from 1413 m 2 /g to 2097 m 2 /g, but also increase the photoreduction capability from −0.13 V to −0.7 V. These results indicated that nitrogen adsorption and activation capacity can be improved by Cu doping. By combining metal ions doping and components regulation of MOFs , this work provides many future opportunities for enhance photocatalytic nitrogen fixation activity.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
CLAY MINERALS
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2021
·Vol. 56
·期 2
·99-107
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IF 1.478
Fengli Dai,Junhui Guo,Yufeng He,Pengfei Song,Rongmin Wang
Montmorillonite (Mnt), a clay mineral with a nanolayered structure, was combined with an Fe-based metal–organic framework (MOF; MIL-53(Fe)) using an in situ growth technique that yielded a novel eco-friendly clay-based adsorbent (MIL-53(Fe)@Mnt). The adsorbent was characterized by scanning electron microscopy, Fourier-transform infrared spectroscopy, X-ray diffraction, thermogravimetric analysis and N2 gas adsorption. The MIL-53(Fe) particles grew on the surface of the nanolayered Mnt and the MIL-53(Fe) particle size became smaller. The adsorption performance of MIL-53(Fe)@Mnt was investigated by removing methylene blue (MB), and optimization experiments were carried out to study the effects of contact time, pH, initial dye concentration and adsorbent mass on the adsorption processes. The MIL-53(Fe)@Mnt exhibited excellent adsorption capacity for MB, namely 313.7 mg g−1, which was 3.02 times and 3.54 times greater than that of pure Mnt and MIL-53(Fe), respectively. Adsorption was fitted with the Langmuir isotherm model and followed a pseudo-second order kinetic model. The MIL-53(Fe)@Mnt obtained is a low-cost and eco-friendly adsorbing material and might be a candidate for removing dyes during water treatment.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Cheng Liu,Qi Chen,Yueling Chen,Jimmy C. Yu,Jionghua Wu,Ling Wu
Photocatalysis, which uses sunlight, N 2 and H 2 O to produce NH 3 , is a more sustainable approach to N 2 fixation than the Haber-Bosch process. However, its efficiency is severely limited by the difficulty of activating N N bonds. This work presents metal (M = Cu, Fe, V)-substituted MIL-125(Ti) (MIL-(MTi)) for photocatalytic N 2 fixation without using any sacrificial agents. Structural characterizations reveal that the active sites including oxygen vacancies (OV) and Ti 3+ species are formed by the resulting crystal distortion due to the partial substitution of Ti 4+ by other metal ions (Cu + , Fe 2+ , V 3+ ) in MIL-125(Ti). MIL-(CuTi) possesses a larger number of OV and Ti 3+ compared to MIL-(FeTi) and MIL-(VTi) due to the larger valence difference between Cu + and Ti 4+ . These active sites not only promote the adsorption and activation of N 2 and H 2 O, but also facilitate the photogenerated charge mobility. Photogenerated holes oxidize H 2 O to produce O 2 and H + . Photogenerated electrons reduce N 2 activated on Ti 3+ sites by combining with H + to form NH 4 + . Therefore, MIL-(CuTi) shows the highest NH 4 + production rate 46.5 µmol·h −1 ·g −1 , which is much higher than that (1.2 µmol·h −1 ·g −1 ) of the pristine MIL-125(Ti). This work provides a new insight into rational design for artificial N 2 fixation systems by the construction of the active site.
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
PubMed
高影响因子
Molecular Catalysis
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2022
·
IF 5.089
Cong Wang,Gang Li,Hongchen Guo
Compared with the mainstream approaches of doping the active metal in the MOFs structure and post-synthetic modification, it is more convenient to directly use the coordinatively unsaturated metal sites of MOFs for catalytic reactions. Herein, two forms of Ni-MIL-77 (1D Ni-MIL-77 and 3D MIL-77) were prepared using one-pot method and characterized by ICP-AES, XRD, FT-IR, XPS and SEM. Among them, 1D Ni-MIL-77 without high temperature heat treatment exhibited a better heterogeneous catalytic ethylene dimerization activity that was up to 989.6 g pro. /(g cat. ·h) (TOF=5544 h −1 ) and the selectivity of 1-butene could reach 93.3% at the optimal conditions. In addition, a probable Cossee-Arlman-like mechanism was proposed. By studying the catalyst structure after reaction, it was found that the reason for limited reuse was the hydrolysis products of the co-catalyst covered the catalysts.
研究领域:
催化
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材料科学
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化学工程
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DOI
高影响因子
MEASUREMENT SCIENCE and TECHNOLOGY
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2022
·Vol. 34
·期 2
·025106
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IF 2.398
Qianchun Zhang,Qin Zhou,Yun Wu,Yanxin Li,Fengling Tian,Shan Tang,Li Jiang
In this study, MIL-53(Al) and Sb2SnO5 were synthesized by hydrothermal and precipitation methods, respectively. The doped MIL-53(Al)/Sb2SnO5 showed excellent catalytic properties, specifically for selectivity and sensitivity for isobutanol (IBN). To assess the catalytic properties of MIL-53(Al)/Sb2SnO5, an IBN gas sensor based on cataluminescence of MIL-53(Al)/Sb2SnO5 was developed, and it demonstrated detection of IBN with high sensitivity, high specificity, fast detection, and good stability. The signal response and recovery time of IBN gas sensor were 0.5 s and 6 s, respectively, and a good linear relation was 0.050–2.5 μg ml−1 (R2 = 0.9956) with a low detection limit of 0.015 μg ml−1. Further, the IBN sensor applied in the detection of real samples had satisfactory recoveries (90.0%–108%) with relative standard deviations of 3.2%–6.7%. The developed sensor based on MIL-53(Al)/Sb2SnO5 has great prospects for the practical detection of IBN gas in the fields of environmental analysis, safety monitoring, etc.
研究领域:
材料科学
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环境分析
·
传感技术
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产品关联
DOI
高影响因子
Materials Today Energy
·
2025
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IF 8.6
Yongjie Zhu,Ruirui Wang,Yongquan Zhou,Wanxia Ma,Jie Fan,Xiaochuan Deng,Chaoliang Zhu,Aimin Yu,Guowang Xu,Dong-Sheng Li,Chenghua Sun
With the booming development of the new energy industry, the demand for lithium resources has increased dramatically. Adsorption is a green and inexpensive process for lithium extraction from saline lakes but current commercial adsorbents generally have low adsorption capacity and poor stability, and are difficult to be applied to the purification of high-concentration lithium salts. Herein, we report an adsorbent, sulfonate-modified MIL-101(Cr) (MIL-101(Cr)-SO 3 H), for the efficient extraction of lithium from brine and highly concentrated lithium solution. It has high adsorption capacity (118.2 mg g −1 ) on Li + adsorption and fast kinetics (3.5 h to achieve full adsorption equilibrium). Detailed investigations clarify that the adsorption follows the Freundlich model in a spontaneous manner. The adsorption mechanisms of MIL-101(Cr)-SO 3 H for Li⁺ primarily include physical adsorption, chemical adsorption, and functional group adsorption. Such capacity is demonstrated with high durability and selectivity, indicating MIL-101(Cr)-SO 3 H is a promising adsorbent for Li + recycling and extraction.
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
DALTON TRANSACTIONS
·
2025
·
IF 3.3
Leiting Si,Jiawei Yang,Guang Liu
BiVO4 is considered as one of the important candidate materials for photoelectrochemical water splitting technology. However, the low efficiency of charge separation and poor kinetics of water oxidation limit its performance in the PEC water splitting. In this work, BiVO4/MIL-53(FeNiCo) photoanode was constructed by a facile hydrothermal deposition method, exhibiting excellent water oxidation ability under AM 1.5 G light irradiation, and achieving a photocurrent density of 3.53 mA cm-2 at 1.23 VRHE, which is about 3.2 times that of pure BiVO4. The electrochemical test results demonstrate that the decoration of MIL-53(FeNiCo) could enhance the charge transfer and accelerate the kinetics of water oxidation reaction, thus leading to the excellent PEC water splitting performance. The PEC stability is also significantly improved, indicating that MIL-53(FeNiCo) allows BiVO4 to be used for water oxidation for stable PEC water oxidation.
研究领域:
材料科学
·
能源技术
✓ 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）