JOURNAL OF CHROMATOGRAPHY A
·
2015
·
IF 4.169
Tao Bao,Juan Zhang,Wenpeng Zhang,Zilin Chen
Much attention is being paid to applying metal–organic frameworks (MOFs) as stationary phases in chromatography because of their fascinating properties, such as large surface-to-volume ratios, high levels of porosity, and selective adsorption. HKUST-1 is one of the best-studied face-centered-cubic MOF containing nano-sized channels and side pockets for film growth. However, growth of HKUST-1 framework inside capillary column as stationary phase for capillary electrochromatography is a challenge work. In this work, we carry out the growth of HKUST-1 on the inner wall of capillary by using liquid-phase epitaxy process at room temperature. The fabricated HKUST-1@capillary can be successfully used for the separation of substituted benzene including methylbenzene, ethylbenzene, styrene, chlorobenzene, bromobenzene, o -dichlorobenzene, benzene series, phenolic acids, and benzoic acids derivates. High column efficiency of 1.5 × 10 5 N/m for methylbenzene was achieved. The formation of HKUST-1 grown in the capillary was confirmed and characterized by scanning electron microscopy images, Fourier transform infrared spectra and X-ray diffraction. The column showed long lifetime and excellent stability. The relative standard deviations for intra-day and inter-day repeatability of the HKUST-1@capillary were lower than 7%.
✓ 已验证
DOI
PubMed
高影响因子
Journal of Materials Chemistry B
·
2023
·Vol. 11
·期 12
·2754-2761
·
IF 7
Yu Ji,Shuang He,Yang Chen,Pei Zhang,Jing Sun,Ya Li,Kaida Kuang,Nengqin Jia
A sensitive dual-signal electrochemiluminescence (ECL) immunosensor was proposed based on Ru(bpy)32+@HKUST-1/TPA and Ce2Sn2O7/K2S2O8 probes for detecting the NT-proBNP biomarker of heart failure. HKUST-1 with a high specific surface area facilitates the loading of more Ru(bpy)32+, effectively improving the anodic signal intensity, while the emerging Ce2Sn2O7 emitter displays a potential-matching cathodic emission with moderate intensity. Two ECL probes were characterized with field emission scanning electron microscopy, X-ray diffraction, XPS, FT-IR spectroscopy and UV-Vis diffuse reflectance spectroscopy. This dual-signal immunosensor has a wide linear range (5 × 10−4–1 × 104 ng mL−1) and a low quantitative detection limit, simultaneously showing high sensitivity, stability and reproducibility, as well as the detection capability of actual serum samples. This dual signal-calibrated immunoassay platform not only reduces the false positive rate of detection results but also provides a promising method for the early diagnosis of heart failure.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanomaterials
·
2023
·Vol. 13
·期 12
·1860
·
IF 5.3
Mingxuan Zhang,Jiawei Zhou,Chunlei Wan,Ming Liu,Xia Wu,Jihong Sun
Clinoptilolite (CP) was successfully synthesized via a hydrothermal route in the presence of polyethylene glycol (PEG), and it was then delaminated by washing using Zn2+containing acid. HKUST-1, as one kind of the Cu-based MOFs, showed a high CO2adsorption capacity owing to its large pore volume and specific surface area. In the present work, we selected one of the most efficient ways for preparing the HKUST-1@CP compounds via coordination between exchanged Cu2+and ligand (trimesic acid). Their structural and textural properties were characterized by XRD, SAXS, N2sorption isotherms, SEM, and TG-DSC profiles. Particularly, the effect of the additive PEG (average molecular weight of 600) on the induction (nucleation) periods and growth behaviors were detailed and investigated in the hydrothermal crystallization procedures of synthetic CPs. The corresponding activation energies of induction (En) and growth (Eg) periods during crystallization intervals were calculated. Meanwhile, the pore size of the inter-particles of HKUST-1@CP was 14.16 nm, and the BET specific area and pore volume were 55.2 m2/g and 0.20 cm3/g, respectively. Their CO2and CH4adsorption capacities and selectivity were preliminarily explored, showing 0.93 mmol/g for HKUST-1@CP at 298 K with the highest selective factor of 5.87 for CO2/CH4, and the dynamic separation performance was evaluated in column breakthrough experiments. These results suggested an efficient way of preparing zeolites and MOFs composites that is conducive to being a promising adsorbent for applications in gas separation.Keywords:clinoptilolite;HKUST-1;composites;fractal structures;delamination;adsorptive separations
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 59
·36111-36118
·
IF 3.119
Huang Kaimeng,Chen Siyuan,Xia Changjiu,Li Chenhao,Zhu Bin,Gao Hongyi,Peng Xinxin,Lin Min,Luo Yibin,Wang Ge,Shu Xingtian
The oxidative coupling of imines to ketazine with molecular oxygen is a green process towards the synthesis of hydrazine or hydrazine hydrate, which could efficiently address the economic and environmental issues of the traditional Raschig or peroxide-ketazine process. Herein, we developed an efficient heterogeneous base-free benzophenone imine oxidative coupling route with O2 catalyzed by Cu/CuOx/carbon materials derived from MOFs under mild conditions. Under optimized conditions, the conversion of BI is up to 98.2% and the selectivity of ketamine is 94.9%. This catalyst has excellent structure stability, recycling, and regeneration performance, owing to the carbonization of organic ligands of MOF at high temperature. More importantly, it is confirmed that the metallic Cu core is essential to improve the catalytic performance of the CuO shell in the BI oxidative coupling reaction, due to the promotion of electron transfer in the CuO surface, making dissolved O2 molecules more easily insert oxygen vacancies. This strategy might open an avenue to the sustainable catalytic synthesis of hydrazine or hydrazine hydrate.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Xue Li,Jinquan Wan,Yongwen Ma,Joe R. Zhao,Yan Wang
Photo-corrosion of Cu 2 O photocatalyst considered as an important factor extremely restricts its catalytic activity. However, so far, there are few comprehensive reports on the mechanism of photo-corrosion inhibition and stability improvement of Cu 2 O in photocatalytic degradation. In this work, oxidized g-C 3 N 4 /Cu 2 O@C (GCNOX/Cu 2 O@C) visible-light catalysts with protective carbon layer were first prepared using the copper-based metal–organic frameworks (HKUST-1) composite as precursors. The UV–visible DRS, PL, XPS valence-band and Mott-Schottky curves were used to characterize that the formation of carbon layer leads to establishing built-in electric field, shifting of energy bands and photogenerated carrier separation. Linear sweep voltammetry (LSV) and electrochemical impedance spectroscopy (EIS) revealed that GCNOX/Cu 2 O@C had the strongest photo-response current and the lowest interface contact resistance. The photodegradation activity of GCNOX/Cu 2 O@C was analyzed for Rhodamine B (RhB) and ciprofloxacin (CIP) under low energy visible light irradiation and the degradation kinetic constants were 0.01413 min −1 and 0.03958 min −1 , respectively, which were much higher than other as-prepared catalysts. It also exhibited outstanding stability with the 87.4% degradation efficiency in 90 min after four recycles. Furthermore, the characterization of GCNOX/Cu 2 O@C after the cyclic reactions further proved the ultra-high stability of the carbonized materials. Additionally, on the basis of degradation experiments and photoelectrochemical results, the possible transfer path of photocarriers between material interfaces, photo-corrosion inhibition mechanism of cuprous oxide and the transformation mechanism of active radicals were proposed. This work provided a novel insight for MOFs-derived composites as a highly efficient and stable visible-light catalyst.
✓ 已验证
产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2019
·Vol. 186
·期 7
·1-8
·
IF 5.479
Sun Xiaodong,Tao Yu,Du Yingxiang,Ding Wen,Chen Cheng,Ma Xiaofei
This work shows that the metal organic framework (MOF) HKUST-1 of type Cu 3 (BTC) 2 (also referred to as MOF-199; a face-centered-cubic MOF containing nanochannels) is a most viable coating for use in enantioseparation in capillary electrochromatography (CEC). A HKUST-1 modified capillary was prepared and characterized by scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectra, elemental analysis and thermogravimetric analysis. CEC-based enantioseparation of the basic drugs propranolol (PRO), esmolol (ESM), metoprolol (MET), amlodipine (AML) and sotalol (SOT) was performed by using carboxymethyl-β-cyclodextrin as the chiral selector. Compared with a fused-silica capillary, the resolutions are improved (ESM: 1.79; MET: 1.80; PRO: 4.35; SOT: 1.91; AML: 2.65). The concentration of chiral selector, buffer pH value, applied voltage and buffer concentration were optimized, and the reproducibilities of the migration times and R s values were evaluated.
Schematic presentation of the preparation of a HKUST-1@capillary for enantioseparation of racemic drugs. Cu(NO 3 ) 2 and 1,3,5-benzenetricarboxylic acid (BTC) were utilized to prepare the HKUST-1@capillary. Then the capillary was applied to construct capillary electrochromatography system with carboxymethyl-β-cyclodextrin (CM-β-CD) for separation of basic racemic drugs.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of CO2 Utilization
·
2026
·
IF 8.6
Jingyun Guo,Bo Yang,Panyouwen Zhang,Changchao Yan,Lei Wang,Zhizhen Ye,Hongmei Chen,Xinsheng Peng
Gas diffusion electrodes (GDEs) are promising for electrical CO 2 reduction (CO 2 RR). Conventional laminate GDEs often suffer from unstable catalyst-substrate interfaces, flooding, salt precipitation, limited active sites, and low efficiency. These challenges call for new architectures designation that ensure both accessible active sites and robust GDE interfaces. Here, we propose a filtration-based fabrication method combined with an in situ expansion strategy to construct PTFE decorated and carbon nanotube threaded HKUST-1 MOFs derived Cu nanoparticles (NPs)@porous carbon (denoted as Cu NPs@CNT) membrane in which MOF-derived Cu NPs are tightly embedded within the porous carbons threaded by a highly conductive CNT network. The interpenetrating structure enlarges gas channels, exposes abundant Cu sites, and minimizes contact resistance, enabling efficient CO 2 delivery and electron transfer. Combining these structural advantages with a highly hydrophobic surface, the resulting Cu NPs@CNT integrated gas diffusion electrode demonstrates a maximum C 2+ Faradaic efficiency of 49.0%, and a C 2+ partial current density of 193 mA·cm −2 at a total current density of 400 mA·cm −2 . This work shows a facile structure-engineering route for efficient CO 2 RR integrated GDEs.
✓ 已验证
DOI
高影响因子
FOOD RESEARCH INTERNATIONAL
·
2026
·
IF 8.8
Liuzi Du,Xiaodong Zhai,Xinyang Han,Ke Zhang,Junjun Zhang,Xiaobo Zou,Zhihua Li,Zhikun Yang,Quancai Sun,Ye Peng,Xiaowei Huang
A bilayer TPU film integrating volatile-amine-responsive colorimetric sensing and sustained antibacterial release. • Bromocresol purple/fluorescein enabled dual colorimetric and fluorescent responses over a broad pH range. • Carvacrol/tea tree oil-loaded L/HKUST-1 inhibited both Gram-positive and Gram-negative bacteria. • The film showed reversible responses to NH 3 , DMA, and TMA, while ΔE correlated well with beef TVB-N ( R 2 = 0.9417). • The bilayer film delayed refrigerated beef deterioration by about 4 days and enabled freshness monitoring. A bilayer TPU-based intelligent packaging film integrating colorimetric sensing and antibacterial preservation was developed. The film consisted of a dense cast TPU indicator layer containing a bromocresol purple/fluorescein indicator and an electrospun TPU antibacterial layer loaded with lignin-modified HKUST-1 loaded with carvacrol and tea tree oil. The indicator showed reversible responses to ammonia, dimethylamine, and trimethylamine, with detection limits of 0.37, 0.15, and 0.18 μ M, respectively. Lignin modification improved the aqueous structural retention of HKUST-1, and the electrospun layer exhibited sustained, pH-dependent release of the antibacterial components. Water vapor permeability was further evaluated under both 25 and 4 °C conditions. The film showed antibacterial activity against the four tested bacterial strains ( Escherichia coli , Staphylococcus aureus , Pseudomonas aeruginosa , and Bacillus subtilis ), while its extracts caused no detectable cytotoxicity under the tested conditions. In refrigerated beef, the selected TBF3-T-LH@CT formulation delayed quality deterioration by approximately 4 days and provided visible freshness indication from yellow to orange-red. The color variation correlated well with beef spoilage indicators, supporting visual freshness monitoring. These results demonstrate the potential of the bilayer film for intelligent active food packaging. Download: Download high-res image (212KB) Download: Download full-size image
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Junjie Li,Xiaodan Sun,Sidra Subhan,Wenxue Gong,Wenyuan Li,Wenqing Sun,Yuming Zhang,Mengting Lu,Hongbing Ji,Zhongxing Zhao,Zhenxia Zhao
The novel Cu-based bimetal polycrystal@carbon (C-HK(Cu/M)) composites derived from metal (Ni, Zn and Co) in-situ substituted Cu-based HKUST-1 were successfully fabricated by partial reduction strategy and employed for the reduction of 4-nitrophenol (4-NP). Systematic characterization demonstrated that Ni showed stronger orbital hybridization with Cu than Zn and Co, thereby significantly improving the catalytic properties of the C-HK(Cu/Ni) composite. The presence of Ni in HKUST-1 efficiently inhibited the reduction of adjacent Cu clusters, leading to the generation of unique polycrystal NiO/Cu/CuO nanohybrids (2.4–8.0 nm) with high dispersion (Cu exposure reaching 88.5%). While, the MOF ligands were catalyzed by doping Ni into the conductive and porous carbons, and finally engineered interfacial synergistic catalysis for enhancing the kinetics and stability for the reduction of 4-NP. The porous support accelerated 4-NP diffusion and adsorption in the composite, and as a consequence, the surrounding polycrystal nanohybrids on conductive carbon were responsible for producing hydrogen reducing species for 4-NP reduction. Therefore, C-HK(Cu/Ni) exhibited ultrafast kinetics and turnover frequency (TOF) for 4-NP reduction, which were up to 179 and 14 times higher than parent C-HK(Cu), surpassing the current state-of-the-art noble metal catalysts. Moreover, the activity of C-HK(Cu/Ni) was evaluated for six consecutive runs with minimal loss, demonstrating the high reusability and practicability of the catalyst on an industrial scale.
✓ 已验证
产品关联
DOI
高影响因子
CARBON
·
2023
·
IF 10.9
Linzi Huang,Jiaodi Li,Yilin Wang,Xuan Hu,Kai Shi,Chunyan Li,Yixi Xie,Pengcheng Zhao,Junjie Fei
l -cysteine (L-Cys) plays an important role in human health as well as in the biological environment. Here, a simple physical mixing technique was used to create the p-n heterojunction by homogeneously immobilizing cuprous oxide/copper@microporous carbon (Cu 2 O/Cu@mC) on the surface of a sheet of g-C 3 N 4 (CNS). Among them, the porous structure of Cu 2 O/Cu@mC after heat treatment is favorable for charge storage. Meanwhile, the carbon element in Cu 2 O/Cu@mC acts as a photosensitizer and electron mediator to extend visible light absorption. Compared with bulk g-C 3 N 4 (CNB), the sheet-like structure and high specific surface area of CNS can be used as a carrier for the binding of Cu 2 O/Cu@mC with L-Cys. Based on the interaction between L-Cys and Cu 2 O/Cu@mC through the formation of Cu–S bonds, Cu 2 O/Cu@mC/CNS was proposed as a light-driven enzyme-free photoelectrochemical sensor for the detection of L-Cys. In the best case, the Cu 2 O/Cu@mC/GCE sensor has a low limit of detection of 1.26 × 10 −9 M for L-Cys and a wide linear range (1.0 × 10 −8 M − 4.0 × 10 −6 M). The repeatability, reproducibility, stability, selectivity and specificity of the sensor were satisfactory. In addition, the potential applicability of the proposed photoelectrochemical sensor was evaluated in tap water and human serum.
✓ 已验证
产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 7
·1-13
·
IF 5.3
Wang Yuefan,Chen Yinzhi,Zhou Yuhe,Wang Yilin,Wu Yingjie,Xie Yixi,Zhao Pengcheng,Hu Xiayi,Fei Junjie
Rutin extracted from natural plants has important medical value, so developing accurate and sensitive quantitative detection methods is one of the most important tasks. In this work, HKUST-1@GN/MoO 3 -Ppy NWs were utilized to develop a high-performance rutin electrochemical sensor in virtue of its high conductivity and electrocatalytic activity. The morphology, crystal structure, and chemical element composition of the fabricated sensor composites were characterized by SEM, TEM, XPS, and XRD. Electrochemical techniques including EIS, CV, and DPV were used to investigate the electrocatalytic properties of the prepared materials. The electrochemical test conditions were optimized to achieve efficient detection of rutin. The 2-electron 2-proton mechanism, consisting of several rapid and sequential phases, is postulated to occur during rutin oxidation. The results show that HKUST-1@GN/MoO 3 -Ppy NWs have the characteristics of large specific surface area, excellent conductivity, and outstanding electrocatalytic ability. There is a significant linear relationship between rutin concentration and the oxidation peak current of DPV. The linear range is 0.50–2000 nM, and the limit of detection is 0.27 nM (S/N = 3). In addition, the prepared electrode has been confirmed to be useful for rutin analysis in orange juice. Graphical Abstract
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Water
·
2023
·Vol. 16
·期 1
·121
·
IF 3.4
Xiaoze Yin,Huaqin Yin,Renjie Wang,Jinnan Wang,Aimin Li
Novel Fenton-like catalyst HKUST-1(Cu)/MoS2-3-C with a non-equilibrium-state surface was constructed for selective degradation of phenolic contaminants. Electron-polarized distribution facilitated the formation of σ-Cu-ligand between electron-poor Cu centre and phenolic compounds, which not only enhanced radicals generation but also accelerated the Cu(I)/Cu(II) redox. Meanwhile, ≡Mo–OOSO3−complexes formed by the electron-rich Mo centre and peroxymonosulfate (PMS), could directly oxidize phenolic contaminants with the generation of SO4•−. The radical quenching experiments and EPR tests indicated that both SO4•−and•OH played a dominant role in the reaction. Additionally, O2could be reduced to O2•−by OVs and subsequently converted into1O2over the Mo centre. DFT calculation, FT-IR, and in situ Raman spectra analysis results demonstrated that phenolic compounds and PMS were respectively adsorbed by electron-poor Cu centre and electron-rich Mo centre, favouring the electrons transfer from phenolic contaminants to Mo centre for PMS activation. With synergistic effects of σ-Cu-ligand and ≡Mo–OOSO3−complexes, HKUST-1(Cu)/MoS2-3-C achieved a high degradation rate of phenolic contaminants and utilization efficiency of PMS.Keywords:fenton-like catalyst;non-equilibrium-state surface;σ-Cu-ligand;≡Mo–OOSO3−complex;phenolic contaminants degradation
✓ 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）