FOOD CHEMISTRY
·
2023
·
IF 8.8
Lixin Kang,Qiufang Liang,Qayum Abdul,Arif Rashid,Xiaofeng Ren,Haile Ma
To prevent food spoilage caused by microbial infection, the development of an environmentally friendly antimicrobial preservation material is crucial. Here, the microporous γ-CD-MOFs was utilized to encapsulate the hydrophobic active substance curcumin, resulting in the preparation of a non-toxic antimicrobial material (Cur-CD-MOFs). The results revealed that curcumin encapsulation in Cur-CD-MOFs occurred primarily in the carbonyl group, benzene ring, and enolic side ring of curcumin. The Cur-CD-MOFs had a 100% bactericidal effect on Escherichia coli and Staphylococcus aureus at 4 h and 8 h, and a strong inhibitory effect on aerial mycelium of Penicillium expansum and Botrytis cinerea . Furthermore, the incorporation of Cur-CD-MOFs improved the Pul/Tre film barrier and mechanical properties. The effectiveness of Cur-CD-MOFs-Pul/Tre in retaining fruit freshness was validated using Centennial Seedless grapes. This study confirmed that Cur-CD-MOFs is a promising antibacterial material, and Cur-CD-MOFs-Pul/Tre will be a potent candidate for food preservation.
研究领域:
食品科学
·
生物技术
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Wangchang Geng,Pengfei Song,Libing Duan,Tingyue Luan
Metal-organic frameworks (MOFs)-derived metal oxides have a high specific surface area and porous structure, making them promising for gas sensing applications. In this paper, MOFs-derived In 2 O 3 /ZnCo 2 O 4 composites were synthesized using a two-step solvothermal method. Through a series of characterization strategies, it is revealed that the morphology of the In 2 O 3 /ZnCo 2 O 4 composites consists of hollow microtubes and microflowers. The gas sensing performance of In 2 O 3 /ZnCo 2 O 4 composites was significantly enhanced compared to pure In 2 O 3 . Among them, the In 2 O 3 /ZnCo 2 O 4 -2 sensor exhibited superior performance towards 100 ppm n -butanol gas, with a lower operating temperature of 200℃, a higher response value of 208.7, a lower detection limit of 4.2 ppb, shorter response/recovery times of 152 s/223 s, higher selectivity, and better repeatability. Furthermore, the improved gas response can be attributed to the utilization of MOFs as self-sacrificial templates, the high specific surface area of the sensing materials, and the formation of p-n heterojunctions. This study provides a valuable reference for synthesizing n -butanol sensing materials with a high specific surface area, strong response, and excellent selectivity.
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
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Muhammad Sabir,Mahmoud Sayed,Zhuofan Zeng,Bei Cheng,Wang Wang,Chuanbin Wang,Jingsan Xu,Shaowen Cao
The photocatalytic conversion of carbon dioxide (CO 2 ) into valuable products holds great promise from environmental and economic perspectives. However, current photocatalytic materials still exhibit unsatisfactory efficiency. In this study, a notably efficient step-scheme (S-scheme) heterojunction was developed by combining the Co-MOFs with carbon nitride nanosheets (g-C 3 N 4 ). The electrostatic interaction between these components not only facilitates the exfoliation of g-C 3 N 4 layers but also enhances the stability of the photocatalyst structure. The optimal heterojunction Co-CN4 photocatalyst achieved a significantly enhanced CO production rate of 16.1 µmol g −1 h −1 , which is 4.7 times higher than that of pure g-C 3 N 4 . This improved activity is ascribed to the enhanced light absorption and mitigated charge carrier recombination. Density functional theory (DFT) computations in conjunction with experimental observations elucidate the establishment of a close contact interface. Additionally, electron paramagnetic resonance (EPR) and in situ X-ray photoelectron spectroscopy (XPS) characterization unveil the electron transfer pathway of Co-CN4 during photocatalytic CO 2 conversion. This study offers valuable insights into the design of S-scheme photocatalysts for enhancement of CO 2 photoreduction.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
Green Processing and Synthesis
·
2025
·Vol. 14
·期 1
·
IF 3
Fuhua Wei,Yan Wang,Qinhui Ren,Qin Zhang,Hongliang Chen,Zhao Liang
Cr/Co-MOFs were synthesized via a solvothermal method using chromium acetate and cobalt chloride hexahydrate as metal ions, and trimeric acid as the organic ligand. The structures of Cr/Co-MOFs were characterized using Fourier infrared spectroscopy, X-ray diffraction, and scanning electron microscopy techniques. These Cr/Co-MOFs were used for removing organic contaminants in wastewater treatment. Fleroxacin and Rhodamine B (RhB) were specifically selected as target molecules in this study to evaluate the removal efficiency based on the mass of Co/Cr-MOFs, concentrations of organic contaminants, and adsorption time. Experimental findings indicated that at a Co/Cr-MOFs dosage of 100 mg, with initial concentrations of Fleroxacin (30 ppm) and RhB (20 ppm), removal efficiencies achieved were 95% and 99%, respectively. Within a timeframe of 5 h, Co/Cr-MOFs attained adsorption capacities amounting to 269.6 mg·g −1 for fleroxacin and 289.5 mg·g −1 for RhB. The interaction between Co/Cr-MOFs and fleroxacin, as well as RhB, is primarily attributed to factors such as pore size, hydrogen bonding, electrostatic charge, and π–π interactions. Moreover, theoretical analysis corroborated these experimental results by demonstrating conformity between the adsorption process and both second-order kinetic model equations alongside Langmuir isotherm model equations. Collectively, the experimental data combined with theoretical investigations underscore the practical significance associated with employing Co/Cr-MOFs for effective eradication of organic pollutants.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2024
·
IF 5.4
Lili Xu,Xinyue Geng,Qi Li,Moju Li,Shu Chen,Xiangnan Liu,Xusheng Dai,Xiuhuan Zhu,Xuekun Wang,Hongbo Suo
The enzyme immobilization technology has become a key tool in the field of enzyme applications; however, improving the activity recovery and stability of the immobilized enzymes is still challenging. Herein, we employed a magnetic carboxymethyl cellulose (MCMC) nanocomposite modified with ionic liquids (ILs) for covalent immobilization of lipase, and used Ca-based metal–organic frameworks (MOFs) as the support skeleton and protective layer for immobilized enzymes. The ILs contained long side chains (eight CH 2 units), which not only enhanced the hydrophobicity of the carrier and its hydrophobic interaction with the enzymes, but also provided a certain buffering effect when the enzyme molecules were subjected to compression. Compared to free lipase, the obtained CaBPDC@PPL–IL–MCMC exhibited higher specific activity and enhanced stability. In addition, the biocatalyst could be easily separated using a magnetic field, which is beneficial for its reusability. After 10 cycles, the residual activity of CaBPDC@PPL–IL–MCMC could reach up to 86.9%. These features highlight the good application prospects of the present immobilization method.
研究领域:
生物化学
·
酶工程
✓ 已验证
DOI
PubMed
高影响因子
CRYSTENGCOMM
·
2023
·Vol. 25
·期 8
·1232-1239
·
IF 3.1
Gui-Mei Huang,Shuang Li,Meng-Xia Ma,Shi-Ming Li,Wen-Qiang Li,Qing-Ling Ni,Liu-Cheng Gui,Xiu-Jian Wang
Four MOFs with mixed ligands, [Zn3(3-BABA)2(bpa)2(H2O)2]n (1), [Cd3(3-BABA)2(bpa)2]n (2), [Cd3(3-BABA)2(bpe)2]n (3), and {[Cd3(3-BABA)2(bib)(DMA)2]·H2O}n (4) (where 3-H3BABA = 4′,4′′′-(((2-carboxyphenyl)azanediyl)bis(methylene))bis(([1,1′-biphenyl]-2-carboxylic acid)), bpa = 4,4′-azopyridine, bpe = 1,2-bis(pyridin-4-yl)ethane, and bib = 1,4-bis(imidazole)butane), have been synthesized. They are characterized by single crystal X-ray diffraction, X-ray powder diffraction (XRPD), thermogravimetric analysis (TGA) and Fourier transform infrared (FT-IR) spectroscopy. In 1, two 3-BABA and two bpa bridge three Zn2+ ions to form a bicyclic [Zn3(3-BABA)2(bpa)2] unit which is further bridged by carboxylate groups with its adjacent units, resulting in a one-dimensional chain. In 2, 3 and 4, the [Cd3(CO2)6] units are bridged by six 3-BABA ligands into a three-dimensional structure. However, the adjacent [Cd3(CO2)6] units in 2 and 3 are doubly-bridged simultaneously by corresponding pyridyl ligands, while the adjacent [Cd3(CO2)6] units in 4 are singly-bridged simultaneously by corresponding pyridyl ligands. The luminescence sensing investigation indicates that compound 1 exhibits extremely sensitive and selective detection of Cu2+ with a detection limit of 0.363 μM, and compounds 2–4 show extremely sensitive and selective detection of Fe3+ with detection limits of 0.539 μM, 0.265 μM, and 0.748 μM, respectively. Competitive experiments in the presence of interfering cations with 1–4 revealed no major change in the quenching efficiency.
研究领域:
化学
·
材料科学
✓ 已验证
DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2024
·
IF 15.7
Jieting Ding,Hao-Fan Wang,Kui Shen,Xiaoming Wei,Liyu Chen,Yingwei Li
The applications of metal-organic frameworks (MOFs) in electrocatalysis are limited by the perfect crystalline nature with insufficient coordinatively unsaturated sites and low electronic conductivity. Here, we report an electrosynthesis method to induce rapid assembly of amorphous MOFs on carbon cloth (denoted as a MnFc’/CC), achieving the amorphization of MOFs with rich active sites and high electronic conductivity. The long-range disordered structure of a MnFc’/CC forms a large number of oxygen vacancies to modify the coordination and electronic structures of Mn sites. In the electrocatalytic hydrazine oxidation reaction (HzOR), the a MnFc’/CC electrocatalyst exhibits superior activity to its crystalline MOF counterparts. Density functional theory calculations reveal that the unsaturated Mn centers present in aMnFc’/CC facilitate efficient electron transfer while simultaneously lowering the free energy of the rate-determining step in the HzOR process.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2022
·
IF 4.889
Jiajia Chen,Baobao Bai,Juan Lei,Peng Wang,Shuang Wang,Jinping Li
Mn 3 O 4 catalysts have shown great potentials for toluene catalytic oxidation for the spinel structure and weak metal oxygen bonds. In this work, Mn 3 O 4 and Mn 2 O 3 catalysts were obtained by using Mn-MOFs with different ligands as precursors. It was found that the reduction of hydroxyl groups in 2,5-dihydroxyterephthalic acid was favorable for the preparation of Mn 3 O 4 under the proper temperature range. The Mn 3 O 4 -MOF-74–300 catalyst exposed the highest Mn 3+ , O ads /O latt and reducing capacity. Herein, the Mn 3 O 4 -MOFs-74–300 catalyst exhibited excellent performance for toluene oxidation, which could achieve 90% toluene conversion at 218 ℃ (toluene concentration = 1000 ppm and SV = 20000 mL·g −1 ·h −1 ). Moreover, the Mn 3 O 4 -MOFs-74–300 catalyst exhibited high stability, circulation performance and water resistance in the catalytic test.
研究领域:
材料科学
·
环境科学
·
催化化学
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Fangke Yu,Huiqi Hao,Jie Gou,Haoqing Li
Based on the carbonization of metal–organic frameworks, this study developed and synthesized a catalyst, referred to as tri-metallic MOF carbonization (TMC), that enhanced electron transfer to facilitate the generation of singlet oxygen. For 20 mg L−1 OFX, micro-electrolysis of PMS in the presence of the TMC catalyst demonstrated remarkable degradation efficiency, attaining 90% degradation in 20 minutes, with a reaction rate constant of 0.18 min−1. The system was catalytically active and capable of degrading different types of pollutants with high efficiency over a wide pH range. The doping of Co/Cu metals promoted the production of 1O2 and high-valent metals, leading to a charge transfer between different metals (Cu → Co, Cu → Fe). The oxidation of TMC by PMS led to the hetero-cleavage of the O–O bond and produced high-valent metal–oxygen. CoFe2O4 and CuFe2O4 with spinel crystal structures were observed to exhibit increased content of Co(II) and Cu(II), respectively. Co(II) was found to be used as an active site for activation of PMS to produce 1O2, and Cu(II) facilitated the non-radical pathway of the reaction. Fe(II) generated by high-valent metals via PMS and the oxidative degradation of electron-rich pollutants. Therefore, high-valent metals and 1O2 play crucial roles in the activation mechanism of perovskite monosulfate (PMS).
研究领域:
环境科学
·
催化材料
·
污染控制
✓ 已验证
产品关联
DOI
高影响因子
Desalination and Water Treatment
·
2015
·
IF 1.173
Ling Li,Li Jun Yuan,Wei Hong,Lu Fan,Le Bao Mao,Li Liu
The adsorptions of methylene blue (MB) and methyl violet (MV) from an aqueous solution of Fe3O4/metal-organic frameworks (MOFs) composite were studied in view of the adsorption isotherm, kinetics and regenerate of the sorbent. The adsorption isotherms of MB and MV on Fe3O4/MOFs composite both followed the Langmuir isotherm. Adsorption kinetics were determined from the experimental data. The used Fe3O4/MOFs could be regenerated by acetonitrile, so it can be recycled for use. The excellent adsorption effect and reusability make Fe3O4/MOFs attractive for the removal of MB and MV from aqueous solution. The feasibility of Fe3O4/MOFs for application in magnetic solid-phase extraction was examined.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2019
·
IF 3.375
Ye Zhang,Zhongyi Jiang,Jing Song,Jian Song,Fusheng Pan,Peng Zhang,Xingzhong Cao
Polymeric dense membranes for separating molecules with similar properties in liquid mixture according to solution-diffusion mechanisms are often constrained by trade-off effects. Integrating a facilitated transport mechanism and a sieving mechanism into membranes is a preferred approach to address this issue. Herein, amine-functionalized titanium-based metal–organic frameworks (NH2-MIL-125(Ti)) immobilized with Ag+, Ag+@NH2-MIL-125(Ti), was synthesized and hybrid membranes were fabricated for pervaporative desulfurization. The immobilized Ag+ can form reversible π-complexation toward thiophene and achieve thiophene-selectivity transport via a facilitated transport mechanism; meanwhile, Ag+ can decrease the effective pore size of the MOFs to elevate the diffusion selectivity of thiophene via a sieving mechanism. Accordingly, the resulting Pebax membranes with 1.0 wt % Ag+@NH2-MIL-125(Ti) exhibit a permeation flux of 22.11 kg/(m2 h) and an enrichment factor of 5.92. Furthermore, the hybrid membranes display increased thermostability and antiswelling properties by the incorporation of Ag+@NH2-MIL-125(Ti). This study proposes a strategy for the rational design of MOFs as nanofillers and endow the membranes with superior separation performance by integrating multiple transport mechanisms.
研究领域:
材料科学
·
分离技术
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
DESALINATION
·
2022
·
IF 11.211
Fan Xiao,Ming Cao,Yingbo Chen
This work reported the successful preparation of a novel nano-Turing structure polyamide membrane. By introducing polyvinylpyrrolidone (PVP) into UiO-66-NH 2 , PVP-UiO-66-NH 2 with high water hydrophilicity and low particle size was synthesized. The aqueous phase dispersion containing PVP-UiO-66-NH 2 was loaded on the support through vacuum filtration method, and PVP-UiO-66-NH 2 was fused in the polyamide layer via traditional interfacial polymerization (IP) technology . The existence of PVP-UiO-66-NH 2 induced the occurrence of “local activation and lateral inhibition” in the IP system, resulting in the appearance of nano-Turing structure on the membrane surface . The successful preparation of PVP-UiO-66-NH 2 @polyamide composite membrane with uniform distribution of PVP-UiO-66-NH 2 was proved. The PVP-UiO-66-NH 2 @polyamide composite membrane showed excellent water permeability of 32.95 L·m −2 ·h −1 ·bar −1 and stable Na 2 SO 4 removal rate of 99.35 %, compared with 17.56 L·m −2 ·h −1 ·bar −1 and 99.56 % of pure polyamide membrane under the same conditions. In addition, the PVP-UiO-66-NH 2 @polyamide composite membrane exhibited excellent long-term filtration stability, thermal stability and antibacterial property .
研究领域:
材料科学
·
环境工程
✓ 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）