MICROPOROUS AND MESOPOROUS MATERIALS
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2020
·
IF 4.551
Jun Yao,Ming Xie,Yang Li
In order to protect human health from the threat of excessive acrylamide in heat-processed foods, swift, uncomplicated, highly selective and sensitive online monitoring methods for acrylamide are urgently needed. In this study, a rare earth metal/transition metal-organic frameworks Eu/Zr-MOFs fluorescence sensor with dual-band luminescence was prepared by the solvothermal method for detection of acrylamide in fried potatoes and cookie crumbs. This sensor exhibited two different fluorescence emission peaks at 430 and 615 nm under excitation of 365 nm, and the ratio of fluorescence intensity was linear with the experimental concentration of acrylamide in the range of 1 × 10 −4 to 1 × 10 −3 M. Under the optimal conditions, the proposed fluorescence analysis method showed that the detection limit of acrylamide was as low as 2.4 × 10 −8 M, and the satisfactory recoveries of 94.05–104.04% were obtained for various spiked samples. More importantly, the sensor has ultra-high selectivity for the detection of acrylamide while other small organic molecules hardly interfere with it in the measurement environment. These studies confirmed that the ratiometric fluorescence sensing method was expected to achieve on-line rapid detection of acrylamide in real foods. In addition, the mechanism of Eu/Zr-MOFs sensing of acrylamide was analyzed and discussed in depth, and the analog computation was carried out by Materials Studio software, and the entire sensing system was studied at the micro level in combination with density functional theory.
研究领域:
分析化学
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食品安全
·
材料科学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2024
·
IF 4.1
Miao Yan,Jingwen Huang,Shumin Zhao,Xinyu Dong,Yan Gao,Jianshe Zhao
Deep desulphurization of diesel is essential because the sulfides from fuel combustion can cause acid rain, respiratory diseases and corrosion of industrial equipment. Peroxophosphomolybdate (BTA) 3 {PO 4 [MoO(O 2 ) 2 ] 4 }·3H 2 O, marked as PMo 4 , was confined in size-matched Zr-MOFs (UiO-66 and UiO-67) to prepared composites for extractive oxidative desulfurization. The composites underwent comprehensive characterization, including ICP-MS, FT-IR, XRD, SEM, XPS, TG and N 2 adsorption–desorption analysis. Desulfurization test was conducted with PMo 4 as homogeneous catalyst, and the reaction conditions were optimized. Then, the catalytic activity of the prepared composites was compared, and the result showed that the catalyst PMo 4 @UiO-67 can remove 94.1 % of the sulfides in the diesel within 100 min. After 15 consecutive tests, the total removal rate of sulfides still reached 88.5 %, thanks to the narrow window of carrier UiO-67 limited the leaching of the active component PMo 4 .
研究领域:
化学工程
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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
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2020
·
IF 3.99
Mingbo Shi,Renliang Huang,Wei Qi,Rongxin Su,Zhimin He
A universal strategy is developed to construct a superhydrophobic and superoleophilic metal-organic framework (MOF) by an amidation reaction between amino group and acid chloride of octadecanoyl chloride. The introduction of long alkyl chain reduced the surface free energy, yielding a superhydrophobic Zr-MOF (UiO-66-NH-C18) with a high water contact angle (WCA) of 151.7°. The adsorbed amount of water on the UiO-66-NH-C18 was only 5.59 mmol/g, which was just 28 % of that on the UiO-66-NH 2 . More importantly, the hydrophobic modification improved the stability of Zr-MOFs under strong alkaline conditions (e.g., pH = 13). Furthermore, the UiO-66-NH-C18 can selectively absorb organic solvent from water and achieve continuous oil-water separation. The oil-water separation efficiency could reach up to 99.9 %. In addition, the UiO-66-NH-C18@sponge was also prepared through dip-coating of UiO-66-NH-C18 on the melamine sponge in the presence of PDMS solution. The resulting composite shows high adsorption capacities for various oils and organic solvents ranging from 32.3–66.1 g/g. The superhydrophobic UiO-66-NH-C18@sponge has potential as a promising absorbent for treatment of oily wastewater.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2026
·
IF 4.6
Peng Ma,Pengcheng Liu,Bohao Zhang,Qingyin Zheng,Chen Wang,Wen-Chao Hu
Ultrasensitive detection of copper ions (Cu 2+ ) is essential for clinical diagnostics and environmental monitoring. This study introduces a novel electrochemical detector for ultrasensitive Cu 2+ detection, utilizing two-dimensional zirconium-based metal-organic frameworks (2D Zr-MOFs) as electrochemical signal amplifiers integrated with a Cu 2+ -specific DNAzyme for target recognition. The unique 2D morphology of the Zr-MOFs provides abundant exposed active sites, enabling a strong and stable electrochemical response. The detection mechanism is based on the Cu 2+ -induced DNAzyme cleavage, which initiates significant electrochemical signal amplification by the 2D Zr-MOFs. The fabricated biosensor achieves an exceptional detection limit of 1.12 × 10 −12 M and a broad linear range from 10 −11 to 10 −4 M, with excellent selectivity and reproducibility. Furthermore, the developed biosensor performed reliably in real water samples, demonstrating its practical applicability. This work not only presents a superior platform for Cu 2+ detection but also pioneers a general strategy that combines the electrochemical signal-enhancing properties of MOFs with the recognition specificity of DNAzymes, paving the way for the next generation of high-performance electrochemical sensors.
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
·
IF 9.965
Fankang Zhao,Shengqiong Fang,Yanxin Gao,Jinhong Bi
The functionalization of metal–organic frameworks (MOFs) is imperative and challenging for the development of practical MOF-based materials. Herein, a magnetically functionalized Zr-MOF (Fe 3 O 4 @MOF-525) was synthesized via secondary-growth approach to obtain an easily-separated and recyclable adsorbent for the removal of pharmaceuticals (tetracycline (TC) and diclofenac sodium (DF)). After loading Fe 3 O 4 nanoparticles (NPs), due to the increase of micropore volume and specific surface area caused by defects, the adsorption performance of Fe 3 O 4 @MOF-525 was improved. The kinetics could be described by the pseudo-second-order kinetic model. The different adsorption capacity and initial rate were attributed to the properties of the pharmaceuticals, including the molecular size and hydrophobicity/hydrophilicity. In isotherm experiments, the maximum adsorption capacities of DF and TC on Fe 3 O 4 @MOF-525 calculated by Sips model reached 745 and 277 mg·g −1 , respectively. The thermodynamic studies indicated the adsorption was endothermic and spontaneous. The effect of pH suggested that electrostatic interaction, π-π interaction, anion-π interaction, and H-bonding were possibly involved in the adsorption process. The adsorbent was separated by magnetic and regenerated. Washed with ethanol, Fe 3 O 4 @MOF-525 remained about 80% adsorption capacity after four cycles. In-situ photo-regeneration under visible-light irradiation was another attractive method, where > 95% TC was degraded in 4 h. The reaction with scavengers revealed that 1 O 2 was the dominant reactive species in our system, indicating the occurrence of Type II photosensitization. The separability, excellent adsorption performance, and recyclability of Fe 3 O 4 @MOF-525 may lead to its beneficial applications in water treatment.
研究领域:
环境科学
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材料科学
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药学
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DOI
高影响因子
Journal of Environmental Chemical Engineering
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2025
·
IF 7.2
Zai-Dong Shao,Peng Wu,Fang Liu,Qi-Jun Zhang,Chao-Yang Guo,Rui-Sang Liu,Jiang Lu,Xiao-Meng Ren,Yu-Ming Zheng
Sulfur dioxide (SO 2 ) emissions present significant environmental and health risks, yet efficiently capturing SO 2 remains challenging due to its corrosive nature and the limited performance of conventional adsorbents. In this study, we developed multivariate metal-organic frameworks (MTV-MOFs) based on UiO-66(Zr) for effective SO 2 capture. Through systematic ligand functionalization with -OH, -NH 2 , -SO 3 H, and -(NH 2 ) 2 groups on terephthalic acid linker, we developed a series of MTV-UiO-66 materials with tailored pore environments and adsorption characteristics. UiO-66-NH 2 exhibited superior performance with an SO 2 uptake of 252.9 mL g −1 at 298 K and 1 bar. Ideal adsorbed solution theory (IAST) calculations demonstrated improved selectivity for SO 2 over N 2 (847) and CO 2 (31), surpassing that of the parent UiO-66. Dynamic breakthrough experiments further confirmed the practical viability of MTV-UiO-66 materials for SO 2 capture under both dry and humid (50 % RH) conditions, with UiO-66-NH 2 retaining a capacity of 30.73 mL g −1 in dry settings and exhibiting robust performance in moisture-rich environments. Grand Canonical Monte Carlo (GCMC) simulations and density functional theory (DFT) calculations provided molecular-level insights into the adsorption mechanisms, revealing that functional groups play a crucial role in modulating binding interactions through hydrogen bonding, dipole-dipole interactions, and spatial confinement effects. The computational binding energies corroborated the experimental isosteric heats of adsorption, validating the integrated experimental-computational approach.
研究领域:
材料科学
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环境化学
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吸附技术
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金属有机框架材料（MOFs）
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计算化学
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
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2022
·
IF 7.392
Menghan Qin,Yumiao Shi,Dingkun Lu,Jingjing Deng,Guoyue Shi,Tianshu Zhou
Due to the excessive use, cephalosporin antibiotics have been detected in various aquatic environments, which may result in environmental and health concern. In this study, bimetallic metal–organic frameworks (MOFs), Hf-UiO-66 and Ti-UiO-66, were successfully designed and obtained via post-synthetic method from UiO-66 for the adsorption of cefoperazone. A serious of adsorption experiments were investigated. The adsorption kinetics and isotherms demonstrated that the adsorption process followed pseudo-second-order kinetic model and Langmuir isotherm model. Hf/Ti-UiO-66 exhibited much better adsorption performance than the undoped UiO-66. Particularly, Hf-UiO-66 had the highest adsorption capacity (346.0 mg g −1 ). With the introduction of Hf or Ti, the chemical coordination environment changed, which resulted in defective structures of MOFs. Such defective structures increased the adsorption active sites, changed the surface charges and enlarged pores. Based on the characterization by FT-IR, XPS, and zeta potential, it was identified that the electrostatic attraction, π-π stacking, hydrogen bonding and metal complexation were the driving force for the high adsorption capacity of the bimetallic MOFs. The as-prepared MOFs displayed good stability and reusability. This work provides a great prospect for the design and application of bimetallic defective MOFs in cephalosporins removal in environmental water.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
高影响因子
Catalysis Science & Technology
·
2023
·Vol. 14
·期 1
·83-89
·
IF 5
Yong Tang,Jianhao Qiu,Dingliang Dai,Guanglu Xia,Lu Zhang,Jianfeng Yao
Defect engineering has recently received much attention as an effective approach for improving photocatalytic performances. Herein, UiO-66-NH2 with missing ligand defects (DUiO-66-NH2) wrapped by ZnIn2S4 was investigated for photocatalytic H2O2 production under visible light. The defects in DUiO-66-NH2 enable efficient charge separation and O2 capture, which are the key factors in accelerating H2O2 production. Specifically, the O2 adsorption capacity over ZnIn2S4/DUiO-66-NH2 was improved by a factor of 3.1 as compared to its counterpart without defects. As a result, in ambient air and pure water without any sacrificial agents, the H2O2 yield of ZnIn2S4/DUiO-66-NH2 was 340 μmol L−1, which was significantly higher than that of ZnIn2S4/UiO-66-NH2 (150 μmol L−1). The main H2O2 formation pathway over ZnIn2S4/DUiO-66-NH2 is an indirect oxygen reduction reaction with ·O2− as the intermediate, and the defects in UiO-66-NH2 could act as active sites to adsorb and activate O2 to produce ·O2−. However, the H2O2 generation over ZnIn2S4/UiO-66-NH2 undergoes both indirect and direct oxygen reduction reactions. This work could provide new insights and inspire further research into defect engineering of MOFs and photocatalytic H2O2 synthesis.
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2019
·
IF 3.372
Xiaoxiao Xia,Meng Cao,Zhilu Liu,Wei Li,Song Li
The use of metal-organic frameworks (MOFs) for adsorption cooling has won increasing research interests due to their outstanding adsorption performance. Zr-MOFs with relatively stable water stability and distinct structure properties are potential adsorbents for cooling. In this work, three Zr-MOFs: UiO-66, UiO-67 and NU-1000 with varying pore sizes were synthesized, and their water and ethanol adsorption isotherms were measured. The specific cooling effects (SCE) and coefficient of performance (COP) of MOF/water and MOF/ethanol working pairs in adsorption cooling system (ACS) were evaluated by adsorption system modeling. The results revealed that the MOFs with small pores and low steps (P/P 0 ) (i.e. UiO-66) in isotherms are favorable for water working fluid, which can achieve high SCE and COP at relative low temperatures. In contrast, MOFs with large pores and suitable steps (i.e. NU-1000) is preferential for ethanol working fluid due to the high uptake. Although water working fluid generally exhibited higher SCE and COP than ethanol, MOF/ethanol outperformed MOF/water because the equivalent cooling performance can be achieved at low temperature as well as the high recycle stability of MOFs/ethanol working pairs.
研究领域:
材料科学
·
能源工程
✓ 已验证
DOI
高影响因子
LANGMUIR
·
2024
·
IF 3.7
Ding Wang,Xiaohua Jia,Zhiqiang Shan,Li Gao,Jin Yang,Zhaofeng Wang,Haojie Song
Fluorinated graphene (FG) among numerous two-dimensional materials has enormous potential in improving antifriction properties. However, they being susceptible to thermal oxidation and prone to wear hinder practical applications. Herein, UIO-66-NH2 (Zr-MOF) enjoying good chemical and thermal stabilities was assembled on the surface of FG nanosheets under covalent bonds and van der Waals forces. The Zr-MOF@FG composite was successfully synthesized and used as a lubricant additive. It can be seen that Zr-MOF@FG composites offer a synergistic lubricant mechanism at the friction interface. Moreover, due to the adsorption and purification performance of Zr-MOF, the obtained Zr-MOF@FG composite adsorbs the abrasive rust during the friction process, thereby realizing the purification of the lubricant. These findings suggest that Zr-MOF@FG shows tremendous potential as a lubricant additive.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2026
·
IF 5.4
Zhengshen Bao,Dehong Xu,Hailong Peng,Changqing Xia,Shixing Wang,Weili Li
Efficient recovery of Au (III) from aqueous wastewater is of great significance for resource utilization and environmental protection. Herein, azine-functionalized Zr-based MOFs (hereinafter referred to as AZA-Zr-MOFs) were prepared via a facile one-pot solvothermal route using 2,2'-diamino-4,4'-(4-amino-1,2,4-triazole-3,5-diyl) dibenzoyl acid as the organic linker. The abundant triazole and amino groups on the MOF surface provide multiple active sites for multi-nitrogen synergistic coordination, thus enhancing the selective capture of Au (III) in aqueous solution. The obtained AZA-Zr-MOFs exhibit a high maximum uptake capacity of 1176 mg/g for Au(III), along with remarkable selectivity and excellent cycling stability (＞90 % efficiency after 5 cycles) over a wide pH range (2.0~9.0). Combined with experimental analyses (X-ray photoelectron spectroscopy (XPS), zeta potential, Fourier transform infrared spectroscopy (FTIR)) and density functional theory (DFT) calculations, the liquid-phase adsorption mechanism of Au (III) is clarified as a synergistic effect of amino-assisted reduction (Au (III)→Au (0)), nitrogen-centered coordination on the MOF surface, and electrostatic interfacial interaction via protonated amino groups. This work provides a feasible preparation method for MOF-based adsorbents and reveals the key role of surface functional groups in the interfacial adsorption of Au (III), which has potential application value for Au (III) recovery from actual aqueous wastewater.
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Gan Ye,Jinghan Wang,Chundi Li,Lei Wu,Jun Zhou,Qiuli Zhang
A solvent-free strategy for the in situ implantation ZrW nanorods within Zr-FDCA was developed. • ZrW-Zr-FDCA retained hierarchical porosity, abundant oxygen vacancies and favorable oil-water wettability. • The optimized catalyst achieved complete oxidation of 1000 ppm sulfur to sulfone at 30 °C within 16 min. • The turnover frequency reaches 365.4 h −1 at 30 °C, which is 3653-fold higher than that of Zr-FDCA. • Tungsten active sites mediate H 2 O 2 activation to produce 1 O 2 as the primary reactive oxygen species. The rational design of highly effective desulfurization catalysts holds great promise for realizing exceptional synergistic catalytic activity toward the production of clean fuels. Herein, we provide a solvent-free strategy for the in situ implantation ZrW 2 O 7 (OH) 2 (H 2 O) 2 (ZrW) nanorods within a metal–organic framework (Zr-FDCA), using renewable organic linkers and Na 2 WO 4 ·2H 2 O as precursors. The resulting ZrW-Zr-FDCA composite retains hierarchical porosity, abundant oxygen vacancies and favorable oil-water wettability, which collectively promote interfacial contact and mass transfer in the biphasic system, thereby significantly enhancing oxidative desulfurization (ODS) performance at room temperature. The optimized catalyst achieves complete oxidation of 1000 ppm sulfur to sulfone at 30 °C within 16 min and maintains 96.7% sulfur removal efficiency over seven consecutive reaction cycles. Its turnover frequency reaches 365.4 h −1 at 30 °C, which is 3653-fold higher than that of Zr-FDCA. Quenching experiment and electron paramagnetic resonance spectroscopy identify W sites as the active centers responsible for H 2 O 2 activation, generating singlet oxygen as the dominant reactive oxygen species driving the ODS process. This work not only expands the one-pot solvent-free approach to encapsulate nanorods within MOFs but also provides an effective route for advancing low-temperature desulfurization. Download: Download high-res image (215KB) Download: Download full-size image
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DOI
高影响因子
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