Advances in Materials Science and Engineering
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2019
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IF 1.399
Zhuo Yao,Dianli Qu,Yuxiang Guo,Yujing Yang,Hong Huang
Novel catalysts with high activity for the selective catalytic reduction of NO with NH3 (NH3-SCR) at low temperatures are highly demanded. In this study, mixed-node metal-organic frameworks (MOFs), e.g. Mn@CuBTC with controlled Mn composition in Cu3(BTC)2, were fabricated using postsynthetic exchange method and their structural characteristics and catalytic performances for NH3-SCR reaction were assessed. A series of analyses in terms of structure, surface morphology, texture, and chemical state determined that Mn ions were successfully incorporated into the Cu3(BTC)2 crystal lattice as well as adsorbed on the walls of nanopores in the framework. The pore sizes can be finely tuned in the presence of Mn ions in the cages, which significantly suppressed water adsorption. The NH3-SCR activity of Mn@CuBTC exhibited nearly 100% NOx conversion rate in the temperature range (230–260°C). The superior NH3-SCR performance is attributed to the proper pore sizes, reduced water content, and the synergistic effect between manganese and copper ions in the MOF structure, which enhanced NH3 bound to the active Lewis sites.
研究领域:
材料科学
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催化化学
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高影响因子
MICROCHEMICAL JOURNAL
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2026
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IF 5.2
Di Yang,Jie Cai,Md Rayhan,Qiuping Fu,Lulu Xiong,Danping Chen,Zhenchao Wang,Bingqian Liu
First application of Cu 3 (BTC) 2 -based composite as a photoelectrochemical platform for trace-level lead ion detection. • Synergistic integration of DNAzyme amplification and exciton-plasmon interaction for enhanced sensitivity. • A Weighted Least Squares (WLS)-based calibration framework to minimize matrix effects, ensuring reproducible and reliable outcomes. The accurate monitoring of lead ions (Pb 2+ ) in complex environmental matrices demands ultrasensitive and robust sensing technologies. Herein, we engineer a DNAzyme-driven “signal-on” photoelectrochemical (PEC) aptasensor based on a precisely controlled layer-by-layer self-assembled TiO 2 /Cu 3 (BTC) 2 hierarchical architecture. By exploiting the spatial precision of this architecture, we position Au nanoparticles (AuNPs) in optimal proximity to the Cu 3 (BTC) 2 framework to facilitate efficient exciton-plasmon interaction (EPI)-mediated photocurrent quenching. Target Pb 2+ triggers the specific cleavage of substrate DNA (sDNA), detaching the Au/PAMAM-hairpin DNA conjugates, thereby restoring the photocurrent proportionally to Pb 2+ concentration. This self-assembled platform achieves exceptional sensitivity with a broad linear range (10 −12 to 10 −6 mol/L) and an ultralow detection limit of 0.97 pM. Crucially, to mitigate heteroscedasticity and matrix interference, a weighted least squares (WLS) calibration model is integrated, which assigns higher statistical weights to low-concentration measurements, significantly enhancing quantitative reliability. The sensor demonstrates satisfactory recoveries in real water samples, establishing a standardized and robust paradigm for trace heavy metal monitoring. This study develops a DNAzyme-driven signal-on PEC aptasensor for trace Pb 2+ detection. A novel Cu 3 (BTC) 2 composite serves as the first PEC substrate for this application. It enhances charge separation efficiency. The sensor synergistically integrates exciton-plasmon interaction with DNAzyme amplification for dual signal enhancement. A WLS-based calibration framework is also incorporated. It standardizes signal processing, mitigates matrix effects, and ensures reproducible quantification in real water samples. Download: Download high-res image (109KB) Download: Download full-size image
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高影响因子
CATALYSIS LETTERS
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2020
·Vol. 150
·期 6
·1786-1797
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IF 2.482
Jiang Haoran,Lu Biao,Ma Lijuan,Yuan Xia
Abstract The esterification of cyclohexene with formic acid is the first step for indirect hydration to cyclohexanol. In the work reported in this study, phosphotungstic acid (HPW) was incorporated into the metal–organic framework Cu 3 (BTC) 2 through a one-step hydrothermal synthesis method to catalyze the esterification reaction. The crystal structure of composite HPW–Cu 3 (BTC) 2 was modulated during the preparation process to convert the catalyst from the {111} crystal facets of the original regular octahedral structure to the {100} crystal facets of the cubic structure using p-toluic acid (pTA) as the regulator. The conversion of the crystal facets reduces the formation through holes while exposing more active sites of HPW. When the mass ratio of the modulator to the organic ligand terephthalic acid was 20, the crystal facets of the catalyst were completely covered by the {100} crystal facets. After the crystal transformation, the conversion of cyclohexene was increased to 86.8%, and the selectivity of cyclohexyl formate was 84.2%. Agglomeration occurred after the catalyst was used twice in the esterification reaction. Graphic Abstract HPW was incorporated into the metal-organic framework Cu 3 (BTC) 2 through a one-step hydrothermal synthesis method and used for catalyzing the esterification reaction of cyclohexene with formic acid. The crystal structure of composite HPW–Cu 3 (BTC) 2 was modulated during the preparation process to convert the catalyst from the {111} crystal facets of the original regular octahedral structure to the {100} crystal facets of the cubic structure using p-toluic acid (pTA) as the modulator.
研究领域:
化学工程
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催化材料科学
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高影响因子
APPLIED CATALYSIS A-GENERAL
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2020
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IF 5.006
Xu Yang,Wu Liu,Fenghua Tan,Zhaoxia Zhang,Xindi Chen,Tengda Liang,Chuande Wu
Catalyst deactivation caused by the metal sintering/leaching is still a great challenge confronted by the scientists. Herein, we report a robust strategy to in situ synthesize mesoporous silica supported highly dispersed copper catalyst by homogeneously hybridizing the silica and metal-organic framework (MOF) copper benzene-1,3,5-tricarboxylate (Cu 3 (BTC) 2 ). We find the introducing silica is the key to the formation of homogeneous hybridization by regulating the growth of Cu-BTC crystallite, yielding various metal dispersion and reducibility during calcination; while the added BTC ligands acts as porous initiator, promoting the accessibility of copper centers for reactants. The optimized CuO#SiO 2 – s1 with molar ratio Cu/Si of 0.23, exhibits excellent catalytic performance towards the furfural hydrogenation, showing a high activity as 9.2 mol FF mol Cu −1 h −1 , nearly 100 % furfural alcohol selectivity and minimized activity decline (<5%) after 5 repeated run. This work could open up a new avenue for the synthesis of mesoporous silica supported highly dispersed metal catalyst for hydrogenation.
研究领域:
化学工程
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材料科学
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2020
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IF 10.652
Lei Wang,Yuanyuan Liu,Juan Han,Yihan Liu,Huiling Lan,Chunmei Li,Yun Wang
Enzyme-nanoMOFs, a very recent and emerging green biocatalyst, has been widely researched to pursue the improvement of enzyme stability. However, MOFs coating decreases substrate accessibility and possesses nanometer size, thus restraining enzyme activity and controllable recycling. Here, inspired by natural biomineralization , we created a morphology-dependent intelligent [email protected] biocatalyst via rationally in situ tailoring the morphology of enzyme-nanoMOFs for enhancing the combination of substrate aptamers. The resulting [email protected] nanoflowers achieved an “on-demand” tuning of functionality, where self-enriching substrate by substrate aptamers acted in synergy with [email protected] enzyme mimics to significantly boost catalytic activity during biocatalysis. Moreover, after completing the catalytic reaction , easily magnetic separation and then competitive release to automatically start the cyclic catalysis were provided by automatic structure switch of aptamer-cDNA hybridization and aptamer-substrate binding. The degradation of BPA with laccase-Cu 3 (BTC) 2 @P1 reached 4.4-fold improvement in the catalytic efficiency. Laccase-Cu 3 (BTC) 2 @P1 could be controllably recycled to retain 76% initial activity after 8 catalytic cycles. These catalytic and recyclable performances were much better than laccase-Cu 3 (BTC) 2 . The combination of the unique morphology of enzyme-nanoMOFs and performance of aptamers brings hope for the industrial application of intelligent [email protected] systems.
研究领域:
生物技术
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纳米技术
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催化
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环境科学
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高影响因子
Nature Communications
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2024
·Vol. 15
·期 1
·1-8
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IF 14.7
Wang Guang,Fan Hongzhao,Li Jiawang,Li Zhigang,Zhou Yanguang
Improving interfacial thermal transport is crucial for heat dissipation in devices with interfaces, such as electronics, buildings, and solar panels. Here, we design a strategy by utilizing the water adsorption-desorption process in porous metal-organic frameworks (MOFs) to tune the interfacial heat transfer, which could benefit their potential in cooling or heat dissipation applications. We observe a changeable thermal conductance across the solid/porous MOF interfaces owing to the dense water channel formed by the adsorbed water molecules in MOFs. Our experimental and/or modeling results show that the interfacial thermal conductance of Au/Cu 3 (BTC) 2 , Au/Zr 6 O 4 (OH) 4 (BDC) 6 and Au/MOF-505 heterointerfaces is increased up to 7.1, 1.7 and 3.1 folds by this strategy, respectively, where Cu 3 (BTC) 2 is referred to as HKUST-1 and Zr 6 O 4 (OH) 4 (BDC) 6 is referred to as UiO-66. Our molecular dynamics simulations further show that the surface tension of Au layer will cause the adsorbed water molecules in MOFs to gather at the interfacial region. The dense water channel formed at the interfacial region can activate the high-frequency lattice vibrations and act as an additional thermal pathway, and then enhance heat transfer across the interfaces significantly. Our findings revealed the underlying mechanisms for tailoring thermal transport at the solid/porous MOF heterointerfaces by water adsorbates, which could motivate and benefit the new cooling system design based on MOFs.
研究领域:
材料科学
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热能工程
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纳米技术
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表面科学
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2014
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IF 4.908
Cuijia Duan,Xingming Jie,Dandan Liu,Yiming Cao,Quan Yuan
In this work a series of mixed matrix membranes (MMMs) containing metal organic frameworks (MOFs) were fabricated to investigate the influence of post-treatment on their gas separation properties. It was revealed that gas permeabilities increased considerably as treatment temperature increased from 150 °C to 180 °C and remained almost unchanged after 200 °C; gas permeability of MMMs from 200 °C treatment was about 3 times higher when compared with MMMs treated at 150 °C. From results of physical characterization including TGA , XRD , SEM, ATR-FTIR and nitrogen absorption it was inferred that higher temperature treatment induced gas permeability increase should be mainly attributed to more effective removal of residual solvent in micro-pores of MOFs; and gas permeation properties of MMMs with different treatment durations from 24 h to 96 h further confirmed our conclusion. This heat treatment induced permeability increase phenomenon was further verified by varying the polymer and MOF combinations. At the end Cu 3 (BTC) 2 /ODPA–TMPDA MMMs with different MOF loadings were prepared and the one with best performance appeared at 40 wt% loading: a dramatic increase of CO 2 permeability from 47.7 Barrer to 260.7 Barrer with almost unchanged CO 2 /CH 4 selectivity from 29.26 to 27.75.
研究领域:
化学工程
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材料科学
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膜技术
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高影响因子
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