COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
·
IF 5.518
Chong Chen,Fengqing Wang,Qiuhao Li,Yunlong Wang,Jun Ma
A robust heterogeneous catalyst SIL-PW/MIL-101(Cr) for biodiesel production was fabricated via a bottom-up strategy using phosphotungstic acid (HPW) as a bridge to integrate SO 3 H-functionalized ionic liquid (SIL) with MIL-101(Cr). The characterization results indicated that HPW was well dispersed in the cavities of MIL-101(Cr). The subsequently introduced ionic liquid reacted with HPW to form heteropolyanion-based ionic liquid, which could be embedded in the mesoporous cages. These newly-developed SIL-PW/MIL-101(Cr) exhibited considerable catalytic activity, with 94.3 % conversion of oleic acid . The comparison experiments manifested the enhanced catalytic performance was attributed to the Brønsted acid sites originating from -SO 3 H groups together with the Lewis acid sites. Moreover, the mesoporous structure of MIL-101(Cr) remained intact during immobilization process, which was beneficial for diffusion of large-sized reactants. Due to the bridging function of HPW, no obvious leaching of active component during recycling was observed and the conversion maintained 91.8 % after reused for five times, displaying satisfactory reusability. This study could open new avenues for designing heterogeneous catalysts with multiple active sites through bridging strategy.
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高影响因子
MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Jianmei Li,Qi Sun,Tuyatsetseg Jambal,Dulguun Dorjgotov,Na Su,Qiuju Wu,Jirimutu
To identify adulterated camel meat in emerging markets, there is an urgent need for sensitive, rapid, and convenient detection methods. In this study, a novel fluorescent sensing platform was developed to effectively identify pork components adulterated in camel meat by regulating the surface charge properties of MIL-101(Cr). Our data demonstrated that the modification of polyethylenimine (PEI) had minimal impact on the crystal structure of MIL-101(Cr). However, it significantly affected the adsorption behavior of MIL-101(Cr) towards 6-carboxyfluorescein (FAM) labelled DNA, thereby influencing the response of fluorescence quenching-recovery. Under optimal conditions, the proposed turn-on fluorescent biosensor, based on PEI-MIL-101(Cr) exhibited high sensitivity with a detection limit of 42 pM. It also demonstrated excellent selectivity for specific target DNA, successfully detecting a pork fraction of 0.45 % (w/w) in camel meat. This study was aimed to provide a fresh perspective on the potential application of functional materials derived from metal-organic frameworks in detecting food adulteration .
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高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Bo Xue,Le Du,Junsu Jin,Hong Meng,Jianguo Mi
The development of a green, efficient, and reusable photocatalyst is of great importance for degradation of organic pollutants in water. Herein, MIL-88A@PA, a composite consisting of macroporous polyacrylate (PA) and metal organic frameworks (MOFs), was prepared by suspension polymerization, amine functionalization, and in-situ growth of MOFs. The nanosized MIL-88A of only 50–100 nm in diameter was reduced by approximately 90% owing to the control of heterogeneous nucleation and growth. More catalytic active sites were exposed and the photocatalytic activity of MIL-88A was significantly improved. The specific surface area of MIL-88A was increased from 132.79 to 219.78 m 2 /g owing to the decreased crystal size, and the corresponding degradation rate constant of Rhodamine B (RhB) was 9.4 times than that of pure MIL-88A. Under visible light irradiation, RhB could be completely degraded in 60 min using MIL-88A@PA with a loading amount of 45%. The degradation rate was still 97% after 5 cycles. The high photocatalytic activity of MIL-88A@PA can be attributed to the effective separation of photogenerated carriers, lower transfer resistance, and more active sites. The composite MIL-88A@PA material exhibits high stability and photocatalytic activity, which offers the potential in environmental cleaning.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Guozhen Qin,Jianfeng Zheng,Yifan Li,Yatao Yang,Xingmin Liu,Xiaojin Han,Zhanggen Huang
Mainly exposed crystal facets and controllable morphology play a key role in the final performance of the preparation of specific nanomaterials . In the present study, a metal–organic framework pyrolysis method without adding solvent modifiers was developed. By adding CO in the calcination atmosphere to change atmosphere ratio, Fe 3 O 4 nanostructures are exposed with different crystal planes and evaluated their performance in NH 3 -SCR reaction. This study proves that SCR catalytic activity of Fe 3 O 4 nanocrystals is dependent on morphology and crystal facet. Compared with materials exposed (1 0 0), catalysts with more (1 1 1) show stronger deNO x performance. The preferential exposure of Fe 3 O 4 (1 1 1) crystal facets increases the concentration of adsorbed oxygen on the catalyst, showing higher surface acidity , and enhances the interaction among NO, O 2 and catalyst, which is conducive to SCR reaction. This is supported by DFT calculations . The results present a great application prospect in preparing nanomaterials with specific crystal structures to effectively treat pollutants.
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2015
·
IF 4.097
Dongfang Wang,Yingchang Ke,Di Guo,Hongxu Guo,Jianhua Chen,Wen Weng
A metal-organic frameworks (MOFs), cauliflower-like MIL-100(Cr), has been facilely prepared through simple reflux method for the first time and characterized by XRD, FT-IR, SEM and XPS. The MOFs was found to be useful for the simultaneous and selective electrochemical detection of microgram Cd(II), Pb(II), Cu(II), and Hg(II) in aqueous solution. The detection was performed by the square wave anodic stripping voltammetry (SWASV). The MIL-100(Cr) modified electrode showed an excellent selectivity and stability for Cd 2+ , Pb 2+ , Cu 2+ , Hg 2+ determinations. The electrochemical properties and applications of the modified electrode were studied. Operational parameters such as pH, deposition potential and deposition time were optimized for the purpose of determination of traces of metal ions .
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高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Minghua Wang,Dan Guo,Bochong Wang,Jianyong Xiang,Kun Zhai,Tianyu Xue,Fusheng Wen,Yingchun Cheng,Congpu Mu
In this work, MIL-96 (Ga) was successfully synthesized by a microwave-assisted method and pyrolyzed at 700 o C to obtain Ga 2 O 3 /C (G-700) composites. After carbonization, Ga 2 O 3 nanoparticles were uniformly embedded in a porous carbon skeleton. The surface of MIL-96(Ga)-derived Ga 2 O 3 /C was used as a template for directional pyrrole polymerization. G-700@PPy composite materials were obtained by in-situ polymerization of pyrrole on the surface of G-700. A hierarchical interfacial structure was created with regulated dielectric properties. The effect of pyrrole doping content on the electromagnetic waves (EMWs) absorption properties of G-700@PPy composite materials was studied. The experimental result showed that the minimum reflection loss ( RL min ) value of G-700@PPy-3 composite materials reached -79.0 dB under a thin thickness of 1.58 mm, and the maximum effective absorption bandwidth (EAB) of 5.66 GHz was obtained under 1.78 mm. The results indicate that highly conductive PPy could significantly improve the impedance matching conditions and electromagnetic attenuation capacity of G-700 composite materials, which provided an important idea for optimizing the microwave absorption properties of low permittivity composites.
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产品关联
DOI
高影响因子
FUEL
·
2024
·
IF 6.7
Wei Fu,Muhammad Kashif,Chen Cai,Jiayin Chen,Hao Zhou,Bingtao Zhao,Philippe M. Heynderickx,Yaxin Su
The hydrothermal technique was applied to prepare a new metal–organic framework, MIL-100(Fe), which was modified by ultrasonic impregnation with different wt % of copper. The results showed that the NO x conversion over 2.3Cu-MIL-100(Fe) was 100 % at 275 °C and maintained at ≥ 85 %, with N 2 selectivity ≥ 90 % in the temperature range of 275–400 °C and high SO 2 resistance. An increase in the Cu content up to 2.3 wt% showed the highest surface area (1206 m 2 /g) observed in N 2 adsorption–desorption. The results show that the introduction of Cu increased the oxygen vacancies on the catalyst surface. Electron transfer and a synergistic effect were observed between Cu and Fe. The shift of the reduction peaks to lower temperatures after the addition of Cu confirmed that Cu improved the reducibility of the catalysts. The 2.3Cu-MIL-100(Fe) exhibited the highest Lewis content (44.97 μmol/g), which functions as an active site for the selective catalytic reduction (SCR) reaction. By precisely controlling the acid-base properties of the catalyst, the specificity for the desired products can be increased in complicated reaction systems, especially in hydrocarbon-SCR technology.
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高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Luyao Yang,Rong Liu,Meiying Xie,Fan Yang
Metal–organic framework materials (MOFs) have potential for practical applications in solid-phase separation technology. However, no studies of the separation of hafnium and zirconium using MOFs have been performed. This work synthesized MIL-101-DGA solid-phase adsorbent material, which was synthesized using amino-containing MIL-101-NH2 as a matrix material by introducing diglycolic acid (DGA) functional groups through a one-step ring-opening reaction. Betaine hydrochloride was selected as the complexing agent to establish the MIL-101-DGA coupling betaine hydrochloride push–pull system; this system could act as an alternative to the traditional MIBK-HSCN separation system. We are the first to report that this MIL-101-DGA coupling betaine hydrochloride system could obtain separation coefficients (βZr/Hf) of 19.7 at pH 0.50 and 8.2 at pH 1.46. Furthermore, the highest adsorption capacity of MIL-101-DGA for Zr was 63.7 mg/g. These results demonstrated that MIL-101-DGA had excellent separation performance for zirconium and hafnium in the betaine hydrochloride medium. This system also exhibited an outstanding cycling performance and immersion stability. After multiple adsorption/desorption cycles and 1 week of immersion in various solutions, the structure and adsorption capability essentially remained unchanged. The adsorption mechanism was thoroughly examined using a suite of analysis and detection methods, including the slope method, FT-IR, XPS, and DFT. In conclusion, we propose that the MIL-101-DGA coupling betaine hydrochloride system, which is an efficient and green separation system, could replace the traditional MIBK-HSCN separation system; our study provides a concept for the industrialization of zirconium and hafnium separation from key mineral resources.
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF SEPARATION SCIENCE
·
2022
·Vol. 45
·期 19
·3754-3762
·
IF 3.614
Zixin Chi,Xi Wu,Qiqi Zhang,Fengyang Zhai,Zesheng Xu,Dandan Zhang,Qing Chen
Titanium-based metal-organic framework MIL-125(Ti) was synthesized by the hydrothermal method of terephthalic acid and tetra butyl titanate in N-N ,dimethylformamide, and methanol. MIL-125(Ti) was characterized by Fourier-transform infrared spectroscopy, X-ray diffraction, thermogravimetric analysis, nitrogen adsorption-desorption, energy-dispersive X-ray spectroscopy, zeta potential, scanning electron microscope, and transmission electron microscopy. The results showed MIL-125(Ti) could be used as a potential adsorbent for protein separation and purification due to the high specific surface area, high stability, and strong hydrophobicity. As a result, MIL-125(Ti) had adsorption selectivity for immunoglobulin G, which was due to the hydrogen bond between MIL-125(Ti) and protein. At pH 8.0, the maximum adsorption efficiency of 0.25 mg MIL-125(Ti) for 300 μL 100 μg/mL immunoglobulin G was 98.3%, and its maximum adsorption capacity was 232.56 mg/g. The elution efficiency of immunoglobulin G was 92.4% by 0.1% sodium dodecyl sulfate. sodium dodecyl sulfate-polyacrylamide gel electrophoresis result demonstrated the successful isolation of highly purified immunoglobulin G from the human serum. Therefore, a new method of separation and purification of immunoglobulin G in human serum using titanium-based metal-organic framework MIL-125(Ti) as a solid-phase adsorbent was established, which broadened the application scope of metal-organic frameworks.
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DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Ziqi Zhang,Tiejun Wang,Siqi Zhang,Kaida Yao,Yueqiu Sun,Yang Liu,Xiangzhi Wang,Weimin Huang
Ti-based MOFs have large superficial area, ordered pores array, biocompatible metallic ions and offer better biocompatibility in contrast with other reported MOFs carriers, which makes it possible to be applied in the biomedical field. In this work, we fabricated a novel La 3+ doped MIL spherical analogue nanoparticle and use it as an additives for composite coating on titanium implant, which exhibited desirable antibacterial property and corrosion resistance without damaging the biocompatibility. This newly synthesized MOF derivative material provides an option for the development of novel in vivo implant coatings.
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DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2020
·
IF 7.632
Chen Tai,Huarong Liu,Yuan Hu
Hydrogen is a very promising green energy alternative to fossil fuel owing to both environmental friendliness and high-energy nature; however, improving the hydrogen production efficiency of photocatalysts under visible light has remained a challenge. Herein, CdS/Pt/MIL-125 nanocomposite has been fabricated using γ-ray irradiation, where Pt and CdS nanoparticles with clean surfaces are well dispersed inside and on the surface of MIL-125, respectively, which greatly promotes effective space separation of photogenerated carriers and thus improves the visible-light catalytic activity. The hydrogen generation rate of CdS/Pt/MIL-125 nanocomposite is found up to 6783.5 μmol/(g·h) under visible-light illumination, which is 7.3 times that of CdS/MIL-125 without Pt as electron trap reservoirs and 4.4 times that of Pt/CdS/MIL-125 without effective spatial separation between CdS and Pt. The reason is attributed to the synergy of ternary CdS/Pt/MIL-125 with a unique ordered mesoporous structure that may widen the absorption range of the light, improve the efficiency of light harvesting, facilitate mass transfer, prevent the aggregation of CdS and Pt nanoparticles, suppress the electron–hole (e–h) pair recombination, and provide more active sites. Moreover, the loading amount of Pt or CdS nanoparticles also affects the activity of CdS/Pt/MIL-125 nanocomposite for visible-light catalytic H2 evolution. In view of the extensive use of γ-ray irradiation in industry, this research presents a rational route to the fabrication of novel hybrid photocatalysts for improved visible-light catalytic hydrogen evolution.
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高影响因子
DALTON TRANSACTIONS
·
2018
·Vol. 47
·期 18
·6394-6403
·
IF 4.099
Yanqin Li,Qi Gao,Lijuan Zhang,Yunshan Zhou,Yuxu Zhong,Ying Ying,Mingcai Zhang,Chunqian Huang,Yong'an Wang
Currently extensive effort is compulsively expended to decontaminate efficiently banned chemical war agents. In this work, H5PV2Mo10O40 molecules have been encapsulated in mesoporous MIL-101(Cr), which features two types of mesoporous cages (internal diameters of 29 Å and 34 Å) and microporous windows (diameters of 12 Å and 16 Å), leading to the formation of a new composite H5PV2Mo10O40@MIL-101(Cr) through a simple impregnation method. The composite was characterized thoroughly by elemental analysis, FT-IR spectroscopy, powder X-ray diffraction, scanning electron microscopy, energy dispersive X-ray spectroscopy, TG/DTA, and textural analysis thereby confirming the encapsulation of the H5PV2Mo10O40 into MIL-101(Cr). The decontamination efficiency of sulfur mustard (4 μL HD in 40 μL of petroleum ether) by 20 mg of the composite is found to be 97.39% in 120 min under ambient conditions. GC-MS analysis on the decontaminated products using 2-chloroethyl ethyl sulfide (CEES), which has been widely used as a simulant of sulfur mustard, showed that MIL-101(Cr) just decontaminates CEES by adsorption, while CEES can be decontaminated under ambient conditions by a synergetic combination of adsorption of MIL-101(Cr) and subsequent chemical oxidation degradation to nontoxic 2-chloroethyl ethyl sulfoxide (CEESO) due to the presence of highly dispersed H5PV2Mo10O40 within the composites.
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高影响因子
危险品化学品经营许可证（带存储）