SENSORS AND ACTUATORS B-CHEMICAL
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2026
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IF 8.3
Longcheng Gong,Chengli Xie,Tong Xu,Min Wang,Lianzhe Hu,Zhining Xia
Detecting structurally similar biomolecules poses a significant challenge in biosensing and clinical diagnostics. Although sensor arrays offer a promising solution, their performance is often compromised by complex probes and matrix interferences. Herein, a series of UiO-66-X (X = NH 2 , B(OH) 2 , CH 3 , H, OH, F, Cl, Br, I, COOH, NO 2 ) were synthesized by modifying the substituent on the bridging ligand. The introduction of the substituent changed the morphology, surface charge, defect structures, and electronic environment of metal-organic framework (MOF), and thus affects its phosphatase-like catalytic activity. Notably, the catalytic performance of UiO-66-X exhibited a positive correlation with the Hammett constant of the substituent, while demonstrating a negative correlation with the intrinsic fluorescence intensity of the MOF. Furthermore, three UiO-66-X (X = H, CH 3 , NO 2 ) nanozymes with distinct catalytic activities were employed as sensing elements to construct an array capable of discriminating five physiological phosphates (i.e., ATP, ADP, AMP, Pi, and PPi). This sensor array demonstrated ultra-high detection sensitivity (10 nM) and an extensive discrimination range (10 nM-25 μM), along with effective interference resistance against endogenous substances. This demonstrates that the sensor array exhibited exceptional performance, holding significant potential for detecting disease-related phosphate biomarkers.
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ChemElectroChem
·
2026
·Vol. 13
·期 2
·e202500382
·
IF 3.5
Hongjie Song,Mengjiao Liu,Dan Li,Ran Chen,Qiong Zhou
The development of high-performance, low-platinum (Pt)-loading catalysts for the oxygen reduction reaction (ORR) remains a critical challenge in proton exchange membrane fuel cells. Zirconium dioxide-carbon composite materials are prepared using the Zr-based metal-organic framework UiO-66 as a precursor. The support structure is modulated by controlling the pyrolysis conditions (700 °C, 800 °C, and 900 °C). Platinum nanoparticles are deposited onto the ZrO 2 -carbon composite framework using ethylene glycol as the reducing agent, yielding low-Pt-content Pt/U-X catalysts (X = 700, 800, 900). The findings demonstrate that the Pt/U-X catalysts exhibit superior electrocatalytic activity compared with commercial Pt/C catalysts. Pt/U-800 displays the highest mass activity (796.9 mA mg Pt −1 ), which is 3.64 times higher than commercial Pt/C (219.2 mA mg Pt −1 ). Furthermore, Pt/U-800 achieves 1250 mA cm −2 at 0.6 V and reaches a peak power density of 1820 mW cm −2 in fuel cell tests. The one-step composite of ZrO 2 and carbon, formed through the pyrolysis of UiO-66, facilitates an interfacial structure between ZrO 2 and Pt, optimizing the hierarchical pore structure of the support, and providing a promising, cost-effective alternative to traditional Pt/C catalysts for fuel cell cathod. Graphical ZrO 2 –carbon composite supports were derived from UiO-66 (a Zr-based metal–organic framework, MOF) by pyrolysis. Pyrolysis temperature regulates graphitization and oxygen vacancies (O v ), strengthening Pt–support interactions. The optimized Pt/U-800 catalyst forms a Pt δ+ –O v –Zr 3+ interface and exhibits enhanced oxygen reduction reaction (ORR) activity with higher half-wave potential (E 1/2 ) and mass activity (MA) than commercial Pt/C.
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CANADIAN JOURNAL OF CHEMICAL ENGINEERING
·
2026
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IF 1.9
Yuanyuan Hu,Yan Tan,Huangqing Liao,Shiyan Long,Jie Huang,Hui Zhang,Gui Chen,Bailin Xiang
The environmental pollution resulting from organic dye wastewater presents a significant threat to human health. Photocatalysis has emerged as a highly promising approach for mitigating wastewater contamination. In this study, a novel synthetic strategy was developed using NH 2 -UiO-66 as a template. By precisely controlling the amount of Ag + ions introduced into the NH 2 -UiO-66 precursor and employing a straightforward reduction approach, the Ag-NH 2 -UiO-66 composite photocatalyst was successfully synthesized. Comprehensive characterization via X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), and X-ray photoelectron microscopy (XPS) confirmed that the incorporated Ag+ ions were effectively reduced to metallic silver and uniformly dispersed within the porous framework. Photocatalytic degradation experiments employing Rhodamine B (RhB) as a model pollutant under ultraviolet irradiation demonstrated that the catalyst with a silver loading of 0.05 mol/L achieved a maximum degradation efficiency of 91% within 150 min, markedly surpassing the 39% efficiency exhibited by pristine NH 2 -UiO-66. Furthermore, cyclic stability tests verified the catalyst's excellent reusability and structural durability. Mechanistic investigations revealed that superoxide radicals (O 2 − ) served as the predominant reactive species responsible for RhB degradation in the Ag-NH 2 -UiO-66 system. This work presents a simple and effective strategy for fabricating highly efficient and stable MOF-based photocatalysts for the remediation of dye-contaminated wastewater.
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JOURNAL OF NANOPARTICLE RESEARCH
·
2026
·Vol. 28
·期 2
·32
·
IF 2.6
Wang Hui,Chen Heng,Zhang Keying,Zhang Ziyang,Zeng Yan,Zhou Hangyue
In recent years, metal–organic frameworks (MOFs) have proven to be effective nanofillers for fabricating thin-film nanocomposite (TFN) membranes for dye wastewater treatment. In this study, University of Oslo-66 (UiO-66) was modified with polydopamine (PDA) to synthesize PDA@UiO-66 nanoparticles, aiming to overcome their inherent dispersion and compatibility limitations. Subsequently, TFN membranes incorporating PDA@UiO-66 (denoted as TFN-PDU) were fabricated via interfacial polymerization using an aqueous piperazine (PIP) solution containing well-dispersed PDA@UiO-66 and an organic trimesoyl chloride (TMC) solution. Owing to the suitable pore size, improved hydrophilicity, and enhanced compatibility of PDA@UiO-66, the prepared TFN-PDU membranes exhibited elevated water permeability, salt rejection, and dye desalination performance compared to the pristine thin-film composite (TFC) membrane and the TFN membrane containing unmodified UiO-66. The effects of different PDA@UiO-66 loadings on membrane morphology, structure, and performance were systematically investigated. Compared to the conventional UiO-66-incorporated TFN membrane (water permeability: 5.21 L·m −2 ·h −1 ·bar −1 ), the optimal TFN-PDU2 membrane (with 0.10 wt% PDA@UiO-66 loading) exhibited a higher water permeability of 6.85 L·m −2 ·h −1 ·bar −1 , an increased Na 2 SO 4 rejection (from 87.6% to 89.4%), and an enhanced methylene blue (MB) rejection (from 93.4% to 95.6%). This study provides a feasible strategy for designing high-performance TFN membranes using hydrophilic MOFs for efficient dye wastewater treatment.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2026
·
IF 9.2
Yachao Ji,Yaqi Xu,Xinyu Luo,Zan Chen,Yawei Du,Sibudjing Kawi,Yinhui Li
Hydrogen energy is a promising carrier for decarbonizing energy systems, but its low volumetric energy density requires efficient storage and transportation. Electrochemical hydrogen compression provides quiet and energy-efficient hydrogen compression and purification, relying on proton exchange membranes with high conductivity and mechanical robustness. Herein, sulfonated poly(ether ether ketone) (SPEEK) with a sulfonation degree of 63.5% was prepared by post-sulfonation, and UiO-66-NH 2 (UN) was incorporated to fabricate SPEEK/UN composite membranes. The amino groups, Zr-OH sites, and confined water in UN provide proton-relay sites and regulate the interfacial proton-transport environment. The optimized SPEEK/UN-0.75 membrane exhibited a conductivity of 231.4 mS cm −1 and tensile strength of 57.6 MPa at 60 °C and 100% RH. Its proton selectivity increased from 4.55 to 13.89, and an outlet pressure of 2.37 MPa was achieved, outperforming SPEEK and Nafion 115. This membrane design provides a promising strategy for developing proton exchange membranes for electrochemical hydrogen compression.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Yuan Chang,Zhenzi Li,Shijie Wang,Xuepeng Wang,Bo Wang,Lijun Liao,Wei Zhou
Metal-deficient Zr nodes are constructed in UiO-66-NH 2 by vacuum treatment. • Zr-node microenvironment regulation enhances charge separation and O 2 activation. • UN 200/28 achieves 272.9 μmol g −1 h −1 H 2 O 2 production in pure water. • UN 200/28 delivers a 20-fold activity increase and 6.36% AQY at 420 nm. • H 2 O 2 formation follows an ORR-dominated pathway with secondary WOR contribution. Photocatalytic H 2 O 2 production from pure water and O 2 offers a sustainable route for green oxidant synthesis, yet its efficiency is limited by insufficient O 2 activation, sluggish charge separation, and poorly defined active sites. Herein, a metal-defect-engineered UiO-66-NH 2 photocatalyst is constructed through high-temperature vacuum treatment to regulate the Zr-node coordination microenvironment. The optimized UN 200/28 preserves the UiO-66-NH 2 crystalline framework and octahedral morphology, while a 7.8% decrease in Zr content is confirmed by ICP, STEM, FTIR, XPS and EPR, thereby indicating the formation of metal-deficient Zr nodes and the reconstruction of the local Zr O coordination microenvironment. These defect-induced structural modifications broaden visible-light absorption, narrow the band gap from 2.88 to 2.57 eV, and promote photogenerated charge separation and transfer. UN 200/28 exhibits markedly enhanced photocatalytic H 2 O 2 production in pure water under O 2 , achieving an H 2 O 2 formation rate of 272.9 μmol g −1 h −1 , a 20-fold improvement over pristine UiO-66-NH 2 , and an apparent quantum yield of 6.36% at 420 nm. The O 2 reduction and water oxidation processes account for approximately 63.2% and 36.8% of the total H 2 O 2 formation, respectively. This work demonstrates that cluster-level regulation of the Zr-node coordination microenvironment is an effective strategy for enhancing photocatalytic H 2 O 2 production in pure water. Download: Download high-res image (110KB) Download: Download full-size image
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APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Xinyu Yuan,Jianwen Hu,Junjie Fan,Jingwen Wang,Chunling Li,Shuangqing Sun
Systematic comparison of ligand functionalization effects on surface properties and demulsification using UiO-66. • Hydrophobic (UiO-66-4F) and electrostatic (UiO-66-NH 2 ) mechanisms both achieve ∼80% demulsification efficiency. • The hydrophobic mechanism is more versatile across different surfactants and oil phases than the electrostatic one. • Surface wettability and charge are key factors governing demulsification performance. • The findings provide insights into tailoring MOF surface chemistry for demulsifier development. The role of surface functional groups in metal–organic frameworks (MOFs)-based demulsification remains poorly understood. Herein, four isostructural UiO-66 derivatives (–H, –NH 2 , –NO 2 , –F) were systematically evaluated as discrete demulsifiers for SDS‑stabilized oil‑in‑water emulsions. The study combined batch demulsification tests with measurements of SDS and toluene adsorption, dynamic interfacial tension, surface wettability, and zeta potential. The hydrophobic fluorinated sample (UiO-66-4F) achieved approximately 80% demulsification efficiency, attributed to strong hydrophobic interactions. The hydrophilic yet positively charged amino‑functionalized sample (UiO-66-NH 2 ) also achieved about 80% efficiency, but via electrostatic attraction to the negatively charged oil‑water interface. Unmodified UiO-66 and the nitro derivative (UiO-66-NO 2 ) exhibited lower efficiencies (<65%). Further tests showed that UiO-66-NH 2 was effective only for anionic surfactants, whereas UiO-66-4F was less affected by surfactant charge. Both MOFs showed higher efficiency for aromatic oils than for aliphatic oils. These results identify two distinct design paradigms – hydrophobic capture and electrostatic neutralization – for MOF‑based particle demulsifiers. Tailoring surface hydrophobicity or charge provides effective demulsification depending on the target emulsion chemistry. This work advances the understanding of structure–property relationships in MOF demulsifiers and offers practical guidelines for developing separation materials. Download: Download high-res image (215KB) Download: Download full-size image
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JOURNAL OF MEMBRANE SCIENCE
·
2026
·
IF 8.8
Hang Yang,Qiankun Sha,Yixuan Wang,Xiaohui Lu,Chang Ma,Na Han
Efficient separation of organic dyes from inorganic salts in high-salinity textile wastewater remains a major challenge for resource recovery. Although graphene oxide (GO) membranes show promise for ion-sieving applications, their practical use is hindered by interlayer swelling, pore compaction, and the inherent permeability–selectivity trade-off. Here, a synergistic interlayer-engineering strategy based on a “skeleton–filler” architecture is proposed using CNT/UiO-66-NH 2 to regulate the GO/substrate interface. In this architecture, carboxylated multi-walled carbon nanotube (MWCNT-COOH) scaffolds, together with metal–organic framework (MOF) particles, effectively mask the macroporous defects of the substrate and suppress sagging of the flexible GO nanosheets. Meanwhile, the hierarchical interlayer creates low-resistance transport pathways, thereby generating a gutter effect and reducing mass-transfer resistance. Consequently, the optimized GCU-27 membrane delivers a high water permeance of 105.14 L·m ‒2 ·h ‒1 ·bar ‒1 , together with a high Congo red rejection of 99.91% and a low MgCl 2 rejection of 3.60%. As a result, a high separation factor of 1071.11 is achieved. In addition, GCU-27 shows good antifouling performance ( = 88.16%) and stable separation performance during 100 h of continuous operation at 70 °C. This work provides an effective interfacial-engineering strategy and mechanistic insight for the rational design of high-performance GO-based membranes for dye/salt fractionation.
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LANGMUIR
·
2026
·
IF 4.4
Yue Qiu,Yingying Ling,Yahong Yuan,Tianli Yue,Fei Lyu
Patulin (PAT), a hazardous mycotoxin found in fruits and their products, poses significant health risks. While UiO-66-NH2 has been primarily explored as an adsorbent or carrier for mycotoxin removal, this study investigates its previously underexplored role as an oxidase-mimicking nanozyme for PAT degradation. UiO-66-NH2 achieved a maximum degradation efficiency of 84.01% within 48 h and 97.63% after 96 h. Mechanism studies revealed that the Zr–O cluster activates O2 to generate reactive oxygen species (·O2– and ·OH), which mediate the oxidative opening of the lactone and furan rings in PAT. The −NH2 enhances both PAT affinity and electron transfer of UiO-66. Three-dimensional fluorescence and LC-MS/MS analyses identified four degradation products (C7H7O5, C7H9O7, C4H5O5, and C3H5O3), enabling the proposal of a plausible degradation pathway. Applied to apple juice, UiO-66-NH2 removed 85.29% of PAT in 72 h, with a negligible impact on juice quality. This work offers an efficient nanozyme-based strategy for PAT detoxification in food applications.
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高影响因子
Nature Communications
·
2026
·
IF 18.1
Fang Geqian,Alhajjar Nour,Yu Wenjun,Marinova Maya,Ben Tayeb Karima,Lin Jian,Roland Thomas,Simon Pardis,De Waele Vincent,Ordomsky Vitaly V.,Khodakov Andrei Y.
Selective photocatalytic oxidation of methane to liquid oxygenates under ambient conditions remains challenging due to the inert C–H bond and propensity for over-oxidation. Controlling carrier transfer and reactive oxygen species is therefore essential to the selective methane photooxidation. Ultrasmall zirconium metal–organic framework (UiO-66-H) nanocrystals in situ grown on titania form a heterojunction that promotes efficient charge separation and tunes the interfacial band alignment. Comprehensive experiments and characterization reveal that this heterojunction precisely regulates • OH and • OOH generation, enabling controlled, radical-mediated oxidation of methane with a competitive oxygenate yield and nearly 100% selectivity at room temperature using air as an oxidant. In this work, ultrasmall metal–organic framework–semiconductor heterojunctions with a built-in electric field provide an effective route for developing efficient, low-cost photocatalysts for methane chemical valorization under mild, solar-driven conditions.
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MICROCHIMICA ACTA
·
2026
·Vol. 193
·期 7
·492
·
IF 5.4
Shen Fei,Wang Sen,Yang Qian,Li Guanglei,Lin Xianchang,Chen Guanyao,Wang Ji,Sheng Rizhi
Endotoxins, specifically lipopolysaccharides (LPS), are components of the outer membrane of Gram-negative bacteria. Due to the fact that even extremely low concentrations of endotoxins can trigger the human body’s inflammatory cascade, there is an urgent need to develop highly sensitive detection technologies for accurate identification and quantitative analysis of trace amounts of endotoxin. This study, based on an electrochemical sensing platform constructed using AuNPs/NH 2 –UiO-66/PEI/MCNs functionalized nanocomposite materials, has successfully achieved efficient detection of endotoxins in food. Given the complex food matrix and numerous interfering substances, this sensor enhances its anti-interference capability through a multi-level cooperative interface design. It uses polyethyleneimine-modified mesoporous carbon nanospheres (PEI/MCNs) as the substrate and integrates the directional loading capability of NH 2 -UIO-66 with the conductivity-enhancing effect of gold nanoparticles (AuNPs), thereby significantly improving signal stability. This biosensor achieves a remarkable detection limit as low as 40 fg/mL, enabling trace-level identification of LPS. Additionally, it exhibits excellent selectivity against common foodborne interferents, facilitating rapid and accurate LPS detection.This study presents a novel, portable detection solution for the rapid screening of microbial contamination in food. The nanocomposite interface construction strategy employed herein provides significant guidance for developing trace-level hazard detection technologies in complex matrices. Graphical
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ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Zhixin Zhang,Boxuan Zhai,Yan Gao,Juan Chen,Yuqiao Su,Yixuan Sun,Hongyi Gao,Ge Wang
Engineering the surface and interfacial architectures of nanomaterials is fundamental to bridging the gap between dispersion stability and tribological efficiency. Metal–organic frameworks (MOFs), characterized by their structural diversity and programmable surface chemistries, represent a burgeoning class of organic–inorganic hybrids for next-generation lubricant additives. Herein, we systematically decipher the synergistic interplay between metal-node identity (M = Ce, Zr, Hf) and surface amphiphilicity in steering the tribological behavior of UiO-type frameworks. Through precise amidation-induced grafting of gradient alkyl chains (C4/C8), we achieved nuanced control over surface hydrophobicity while maintaining structural integrity. Notably, the octanoic-functionalized Zr-UiO-66-NH2 exhibits exceptional lubrication performance in 500SN base oil; at a low loading of 0.2 wt %, it yields a 27% reduction in the steady-state friction coefficient and a remarkable 81% suppression in wear volume. Advanced surface analysis reveals that the alkyl-chain functionalization promotes the enrichment of aliphatic and carbonyl moieties at the sliding interface, effectively lowering interfacial adhesion and shear resistance. Furthermore, XPS depth profiling identifies a robust, protective tribofilm composed of MOF-derived inorganic clusters and organic decomposition products, which significantly enhances oxidative stability. This work provides a versatile strategy for the molecular-level engineering of MOF-based additives to meet the demands of high-performance lubrication technologies.
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