ANALYTICAL CHEMISTRY
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2025
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IF 6.7
Chengli Xie,Longcheng Gong,Tong Xu,Lianzhe Hu,Zhining Xia,Min Wang
To overcome the limitation of low catalytic activity in nanozyme labels for immunoassay, this study proposed a heterovalent Co-doping strategy to construct the bimetallic Zr/Co-UiO-66-NH2 nanozyme. Compared to the undoped UiO-66-NH2, the resulting nanozyme exhibited a 14-fold enhancement in phosphatase-like catalytic efficiency (kcat/Km). Mechanistic investigations revealed that the activity enhancement was not only dependent on the high specific surface area and increased defects introduced by heterovalent Co doping, but also was attributed to the electronic synergy between Zr and Co. Furthermore, a fluorescent immunoassay method utilizing highly efficient Zr/Co-UiO-66-NH2 as the nanozyme label was developed for the ultrasensitive detection of carcinoembryonic antigen (CEA). This method achieved a broad linear detection range spanning 6 orders of magnitude (1 × 10–12 g/mL to 1 × 10–6 g/mL) and a detection limit as low as 0.74 × 10–12 g/mL. The high recovery rates (95.89%–99.31%) in serum samples demonstrate great potential for the detection of CEA in complex biological matrices.
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DOI
PubMed
高影响因子
Applied Materials Today
·
2025
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IF 6.9
Longfang Ren,Fangfang Dong,Xiaodong Gao,Sijie Yu,Taotao Qiang
The flexible ammonia sensor can detect the ammonia content in the air or the exhaled gas of humans, but the commonly used sensors have poor breathability and washability, so they are not suitable for direct contact with human skin. In this work, based on the excellent flexibility and permeability of nonwovens, UiO-66-NH 2 /MoS 2 @nonwoven (UMN) and UiO-66-NH 2 /MoS 2 /Ag@nonwoven (UMAN) gas sensors were prepared by loading self-prepared UiO-66-NH 2 /MoS 2 (UM) and UiO-66-NH 2 /MoS 2 /Ag (UMA) onto microfiber nonwovens. The results show that UMN and UMAN gas sensors exhibit high selectivity toward ammonia gas. The response values of UMN and UMAN demonstrate a consistent linear trend within the ammonia concentration range of 1–50 ppm and reach 43 % and 47 % at 1 ppm respectively. The response variations of the sensors before and after bending are below 4 %, demonstrating excellent bending stability. After washing for 24 h, the gas sensing performance shows nearly no change, indicating that they both have good reusability and washability. However, the sensors exhibit limited thermal and humidity stability. Given the challenges such as poor breathability and insufficient biocompatibility faced by traditional flexible gas sensors, UMN and UMAN sensors have emerged as highly promising alternatives with distinct advantages.
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TOPICS IN CATALYSIS
·
2025
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IF 3
Guan Yueyue,Zeng Xianglong,Liu Shuming,Yao Kai,Hu Zhenhui,Xiao Longhao,Fang Zheng,Yang Yongsheng,Liu Hongjun
To address the issue of limited degradation efficiency due to rapid carrier recombination in piezoelectric catalysis, this study designed a ternary heterojunction structure of ZnO/CuO@UiO-66-NH 2 . A ZnO/CuO heterointerface was constructed on the surface of UiO-66-NH 2 via a hydrothermal method, forming a composite piezoelectric catalytic system with abundant active sites and enhanced built-in electric fields. Theoretical analysis indicated that UiO-66-NH 2 , as a carrier, not only significantly increased the specific surface area of the material but also cooperatively regulated the charge distribution in the heterojunction region. Under ultrasonic vibration, the piezoelectric potential generated by the ZnO/CuO heterojunction effectively drove carrier separation, thereby significantly enhancing the redox reaction efficiency. Under dark conditions, the 30-minute degradation rate of RhB by this material reached 99.7%, with a rate constant of 0.09435 min⁻¹, far superior to the pure ZnO/CuO system. Additionally, ZnO/CuO@UiO-66-NH 2 demonstrated excellent catalytic performance and cycling stability in the degradation of methyl orange and methylene blue. Band structure and radical trapping experiments confirmed that hydrogen radicals (·H) and superoxide radicals (·O 2 ⁻) were the main active species in the degradation process. This research provides new material ideas for the development of efficient and stable heterojunction piezoelectric catalysts and offers potential pathways for the construction of integrated systems for dye wastewater treatment and energy conversion. Graphical
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JOURNAL OF APPLIED POLYMER SCIENCE
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2025
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IF 2.8
Ke Liu,Qisong Liu,Rui Fan,Hongfa Huang,Hua Yi,Chao Hu
Mixed matrix membranes (MMMs) incorporating metal–organic frameworks (MOFs) as fillers show attractive selectivity and permeability for gas separation. However, the performance improvement is restricted by undesirable interfacial interaction and inhomogeneous dispersion of MOFs in the membrane matrix. In this paper, amino-functionalized UIO-66 (U6N) with high porosity was employed as a filler and further regulated by a controlled plant polyphenol-induced surface modification strategy. The process involved the formation of tannic acid-iron(III) complex (TA-Fe(III)) on the U6N surface, which improved interfacial compatibility with the polyimide matrix while introducing abundant hydroxyl groups to enhance gas transport properties. Accordingly, the modified MMMs containing 30 wt.% U6N@TA-Fe(III) achieved optimized gas separation performance. Specifically, the CO 2 permeability increased to about 2495.9 Barrer with a CO 2 /CH 4 selectivity of 19.32, which exceeded the 2008 Robeson upper limit and showed an increase of 22.1% and 25.6%, respectively, compared to the MMMs embedded with unmodified U6N. Moreover, the improved dispersion of the U6N@TA-Fe(III) within the membrane structure is conducive to improving separation performance for CO 2 /N 2 and O 2 /N 2 . Therefore, this work provides a novel insight into the rational design of the MMMs via a facile modification strategy, which can further improve the gas separation performance of the MMMs.
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FUEL
·
2025
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IF 7.5
Li-Li Xue,Qing He,Si-Wen Li,Jian-She Zhao
In recent years, the escalating global demand for clean energy has underscored the urgency of developing high-efficiency fuel desulfurization technologies. This study reports the facile synthesis of a molded fiber-supported composite catalyst, POM@UiO-66-NH 2 @CF (PU N C), via impregnation, integrating polyoxometalates (POMs) with amino-functionalized metal–organic frameworks (MOFs) on cellulose fibers (CF). The catalyst delivers exceptional performance in ultra-deep oxidative desulfurization (ODS), enabled by systematic optimization of reaction parameters using response surface methodology (RSM) with a Box-Behnken design (BBD). Through RSM optimization and adjustment, the actual desulfurization conditions were determined as 66 °C, O/S = 7, 7 mL DMF, and 2 catalyst pieces and PU N C achieved a validated 99.26 % desulfurization efficiency for dibenzothiophene (DBT) in model fuels, demonstrating close agreement with theoretical predictions. Kinetic analysis revealed the ODS reaction conformed to a pseudo-first-order kinetic model with a low activation energy of 2.45 kJ/mol, while EPR spectroscopy confirmed ·O 2 − radicals as the dominant reactive species, highlighting a POM-mediated radical oxidation pathway. PU N C exhibited robust reusability, maintaining >95 % efficiency over 5 consecutive cycles. The catalyst’s performance is attributed to the synergistic architecture of MOF-fiber supports, where 3-chloropropyltrimethoxysilane (CPTMS) enables covalent bonding of UiO-66-NH 2 to CF, creating amine-rich sites for electrostatic POM immobilization and enhanced stability. This work showcases the synergy between structural design and RSM-driven optimization, offering innovative insights for developing high-efficiency, environmentally benign molded catalysts for ultra-deep ODS and related oxidative processes.
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JOM
·
2025
·
IF 2.3
Du Boyu,Qi Xianjin,Li Yongkui,Pan Hongyan,Lei Wenya,Yan Kai
In this paper, UiO-66-NH 2 was synthesized by a solvothermal method. Two defects were induced by the introduction of an acid modifier and an iron source during synthesis. The effect of the acid modifier on the degree of defects and adsorption properties of the material was investigated by adjusting the type of acid modifier. The results showed that the addition of Fe and benzoic acid yielded the largest specific surface area in UiO-66-NH 2 with abundant defect structures. This enabled Fe-UiO-66-NH 2 -BA to achieve 78.83% arsenic removal within 60 s. The adsorption process followed pseudo-second kinetics and the Langmuir isothermal model. Notably, the adsorption capacity of Fe-UiO-66-NH 2 -BA for arsenic in wastewater at pH 11 (2010 mg/g) was superior to those of most of the reported MOF adsorbents. The excellent arsenic adsorption capacity can be attributed to the formation of free Lewis acid sites and ligand complexation by MOF deletion linkage defects, and the adsorbent can still maintain > 80% adsorption capacity after five cycles of regeneration. In conclusion, Fe-UiO-66-NH 2 -BA, as an efficient adsorbent for efficient capture of arsenic from wastewater, provides a new concept for water purification technology.
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APPLIED CATALYSIS A-GENERAL
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2020
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IF 5.006
Mo Qiu,Tianmeng Guo,Ran Xi,Danni Li,Xinhua Qi
In this paper, the as-prepared metal-organic frameworks material UiO-66 and other Zr-MOFs were directly used as catalytic transfer hydrogenation (CTH) catalysts to catalyze furfural (FF) to furfuryl alcohol (FAL) with 2-propanol (IPA) acted as both solvent and hydrogen donor. The results showed that the as-prepared UiO-66 had satisfactory catalytic activity and selectivity in yielding FAL (97 %) from the CTH of FF at 140 °C within 5 h. Moreover, the as-prepared UiO-66 exhibited relatively stable catalytic activity over five cycles and easy regeneration. Interestingly, UiO-66 was also applicable for the CTH of the other aldehydes such as 5-hydroxymethyfurfural, 5-methylfurfural, 4-methoxybenzaldehyde, and n-hexanal to the corresponding alcohols, affording high product yields up to 98 %. This work provides a green, simple and sustainable process for the catalytic production of FAL from biomass-based furfural, which has certain significance for the sustainable utilization of biomass.
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Desalination and Water Treatment
·
2024
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IF 1
Sheng Feng,Runbai Wang,Shanshan Feng,Zhihui Zhang,Shuguang Liu
In this study, a perfect UiO-66 was synthesized by adding benzoic acid in the precursor solution and activating it with chloroform after synthesis. The crystal morphology and material properties of the synthesized materials were investigated by X-ray powder diffraction, Fourier-transform infrared spectroscopy, scanning electron microscopy, N 2 adsorption–desorption analysis, zeta potential, and thermogravimetric analyses. A typical anionic organic dye, Congo red (CR), was used as the target contaminant to examine the adsorption properties of a series of UiO-66. The acid-promoted and activated UiO-66 had a more regular octahedral structure, high-surface area of 905–1,230 m 2 /g, and more positive zeta potential (hydrogen ion), which might explained the greatly enhanced adsorption of CR dye. The effect of several influential parameters such as adsorbent dosage, solution pH, initial dye concentration, temperature, and contact time was well studied and optimized by using batch adsorption study. Moreover, mechanisms with kinetic, isotherm, and thermodynamics were researched in detail. The acid-promoted and activated UiO-66 could be regenerated by a simple N, N-dimethylformamide -washing method and exhibited stable and high reusability over five cycles. Overall, the acid-promoted and activated UiO-66 was an excellent candidate for wastewater treatment due to a simple synthesis procedure, high efficiency, reusability, and stability in the aqueous phase.
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高影响因子
JOURNAL OF PHYSICAL CHEMISTRY A
·
2020
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IF 2.6
Lincheng Li,Yunlan Xu,Dengjie Zhong
Herein, we reported a simple solvothermal and chemical oxidation method to synthesize a magnetic core–shell composite (Fe3O4@UiO-66@PANI) for Cr(VI) removal from wastewater. Due to the porosity and stability of UiO-66 and stability, high acid resistance, and multiple active (reducing and chelating) groups of polyaniline (PANI), Fe3O4@UiO-66@PANI exhibited excellent efficiency, regeneration, and reusability performance for Cr(VI) removal. Its maximum adsorption capacity and removal rate were 474.42 mg·g–1 and 99.90%, respectively. The effects of initial pH values, contact time, and initial Cr(VI) concentration on Cr(VI) removal were investigated. The fitted data showed that the adsorption process was consistent with the pseudo-second-order kinetic model and Langmuir isothermal model. The study of the mechanism shows that the excellent efficiency of Fe3O4@UiO-66@PANI is due to the electrostatic adsorption and reduction of Cr(VI) and the chelation of Cr3+. The results demonstrate that Fe3O4@UiO-66@PANI is a promising adsorbent for the Cr(VI) removal.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2026
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IF 5.4
Chen Wang,Yinzheng Xia,Yue Li,Qianhong Shen,Hui Yang
This work presents the design of UiO-66-PDA@TANI, a novel MOF-oligomer nanocomposite that synergistically integrates pH-triggered inhibitor release with redox-mediated passivation to enhance epoxy coating protection. Release studies revealed a 13-fold increase in alkaline-activated Zr 4+ /ligand release, while cyclic voltammetry and electron paramagnetic resonance analyses confirmed that heterogenous integration of UiO-66 improves the electron transfer efficiency of TANI. Potentiodynamic polarization tests demonstrated that UiO-66-PDA@TANI achieved a corrosion inhibition efficiency of 75.62% in saline solution within 24 h. Long-term EIS measurements showed superior barrier properties, with the composite epoxy coating exhibiting |Z| 0.01Hz = 1.85 × 10 10 Ω·cm 2 after 60 d of immersion, compared to 5.51 × 10 7 Ω·cm 2 for pure epoxy. Artificial defect experiments further revealed self-healing behavior, with an improvement efficiency of 229.67% after 48 h, indicating localized protection beyond that of pristine coatings. These findings demonstrate that the synergistic interplay between UiO-66 and TANI enables dual protection: rapid inhibitor delivery at corrosion sites via pH-induced framework disintegration and regeneration of passivation films via enhanced TANI redox cycling for long-term durability. This work introduces a previously unreported strategy that leverages UiO-66 for electron conduction-enhanced corrosion protection, offering fundamental design principles for pH/redox dual-responsive protective systems.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2026
·
IF 4.6
Lian-Lian Duan,Wen-Jun Liu,Rui Zhai,Zhen-Guang Wang,Hong-Yuan Yan,Yun-Kai Lv
This study employed a pore-confined synthesis strategy to achieve the in situ growth of bovine serum albumin-capped copper nanoclusters (BSA-CuNCs) within the UiO-66 framework (BSA-CuNCs@UiO-66). This nanocomposite enables highly sensitive and specific detection of creatinine (CR). Results demonstrated that the spatial confinement imposed by UiO-66 induced aggregation of the BSA-CuNCs and suppressed non-radiative transitions, leading to an approximately 10-fold enhancement in fluorescence intensity and a 11-fold increase in quantum yield. Leveraging the specific adsorption and enrichment capability of the UiO-66 framework toward CR, the BSA-CuNCs@UiO-66 fluorescence probe exhibited significant fluorescence quenching upon exposure to CR, achieving a detection range of 50–1000 nM and a detection limit of 30.81 nM. This work presented a novel confinement engineering strategy utilizing metal-organic frameworks (MOFs), establishing a new design paradigm for high-performance fluorescence probes with significant potential in bioanalytical applications.
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DOI
PubMed
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SENSORS AND ACTUATORS B-CHEMICAL
·
2026
·
IF 7.7
Zhongyu Xiao,Xin Liu,Wenjing Zhao,Yang Liu,Quanhua Xie,Zhengkun Wang,Hassan Karimi-Maleh,Qiongyao He,Jianxin He,Nianbing Zhong
A reflective optical fiber gas sensor was developed for the accurate detection of acetic acid gas concentrations in real time. This sensor comprises a multimode quartz optical fiber and a sensing unit coated with a material that selectively responds to acetic acid. The sensing unit consists of a light channel coated with a Ag film, on which a composite film of TiO 2 /functionalized zirconium metal-organic framework (UiO-66–2CF 3 ) is deposited. Upon absorbing acetic acid, the refractive index of the TiO 2 /UiO-66–2CF 3 film increases, enhancing the light absorption at 326 nm while reducing the reflectance. This decrease in the transmitted light intensity enables the accurate measurement of the environmental acetic acid concentration by detecting the difference between the output and input optical intensities. Experiments were performed to investigate the dependence of the sensor performance on the TiO 2 content in TiO 2 /UiO-66–2CF 3 , coating thickness, light incidence angle in the optical channel, and ambient temperature and humidity. In the range of 10–40 °C and 40–80 % RH, the sensor with 45 wt% TiO 2 in the composite, a coating thickness of 55 μm, and an incident angle of 45° yielded an acetic acid gas response sensitivity of 0.0007 absorbance unit/ppm, a response time of 315 s, detection limit of 4.29 ppm, and maximum relative error below 5.0 %. The incorporation of the –CF 3 group into UiO-66 endowed the sensor with excellent humidity immunity, a high selectivity for acetic acid, and long-term stability.
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