Chemosensors
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2026
·Vol. 14
·期 7
·156
·
IF 4.4
Tong Xiang,Chongyang Zhang,Qiongqiong Ren,Jinlong Chang,Linyan Xie,Xuming Sun
Nitrite (NO2−) is a crucial environmental and food safety indicator, and excessive intake poses severe threats to human health; thus, highly sensitive and selective detection methods are urgently needed. Herein, a ratiometric fluorescent nanosensor based on N-CDs@UiO-66-NH2was constructed via a facile assembly strategy for sensitive and selective nitrite detection. The composite demonstrated dual-emission fluorescence at 456 nm and 730 nm under 365 nm excitation, originating from UiO-66-NH2and N-CDs, respectively, enabling an intrinsic self-referencing signal. The fluorescence intensity ratio exhibited a good linear response toward nitrite in the range of 10–100 μM and 100–450 μM with a limit of detection (LOD) 1.76 μM. The nanosensor showed high selectivity and anti-interference ability against various ions and molecules. Furthermore, it was successfully applied to nitrite detection in lake water samples with satisfactory recoveries (97–101%) and low relative standard deviations (<1.8%). This work provides a simple and effective approach for nitrite monitoring in environmental samples.
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APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Yu Wang,Runze Tong,Jie Lv,Fanyong Yan,Shanshan Li,Xiule Wang,Juanru Huang,Yang Fu
Dual MOF Heterojunction with Enhanced Light Response: was constructed via epitaxial growth and surface modification with yellow-emitting carbon dots. • The optimized catalyst achieved 94.6% degradation of TCH under visible light. • Quenching experiments and EPR analysis confirmed that hydroxyl radicals (·OH) and superoxide radicals (·O 2 − ) serve as the primary reactive species. Metal-organic frameworks (MOFs) have attracted significant attention due to their excellent catalytic properties; however, the limited light-responsive range of individual MOFs restricts their practical photocatalytic applications. Moreover, constructing dual-MOF-based systems provides an effective strategy for integrating complementary functional units and enhancing catalytic performance. In this study, a dual-MOF structure was constructed through an epitaxial growth strategy, and a novel dual-heterojunction catalyst was fabricated by introducing yellow-emitting carbon dots (YCDs) onto the surface of NNU-36@UiO-66. Under visible-light irradiation, the obtained YCDs@NNU-36@UiO-66 composite exhibited enhanced photocatalytic activity toward the degradation of tetracycline hydrochloride (TCH), achieving an overall degradation efficiency approximately 1.15 times higher than that of pristine NNU-36@UiO-66. Reactive species trapping experiments revealed that hydroxyl radicals (·OH) and superoxide radicals (·O 2– ) were the predominant reactive species involved in the photocatalytic process. This work provides new insights into the rational design of stable dual-heterojunction photocatalysts based on MOF composites for environmental remediation applications. Download: Download high-res image (105KB) Download: Download full-size image
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Chengyue Yang,Yuxin Sun,Peilin Xue,Yu Sun,Jiwei Wang,Jianshe Hu,Hao Yang
Defect engineering in metal-organic frameworks (MOFs) is critical for enhancing their adsorption performance. Herein, a “large-pore” UiO-66-SH (LP-UiO-66-SH) was successfully synthesized by introducing the monodentate ligand 3-amino-4-hydroxybenzoic acid (3,4-AHBA) into UiO-66-SH. This strategy generates ligand defects and creates opens metal vacancies, thereby enhancing the porous structure and the density of active sites. Consequently, LP-UiO-66-SH exhibited significantly superior adsorption kinetics and capacity compared to micro-UiO-66-SH, achieving a maximum Hg(II) uptake of 1180 mg g −1 (versus only 560 mg g −1 for micro-UiO-66-SH under comparable conditions) and rapidly reducing the Hg(II) concentration in seawater to the drinking water standard (0.002 mg L −1 ) within 8 min. DFT and molecular dynamics (MD) simulations further revealed that S H, -NH₂ and -OH groups cooperatively participate in Hg(II) binding, while the presence of a porous architecture significantly improved adsorption kinetics across a wide range of initial Hg(II) concentrations. This study provides a defect-engineering strategy for designing efficient porous adsorbents for mercury-contaminated water remediation and, through combined experimental and theoretical analyses, elucidates the intrinsic coupling mechanism between defect-induced binding sites and ion transport within the engineered framework.
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Corrosion Communications
·
2026
·
IF 10.7
Jiaxuan Zhou,Lingjie Li,Kai Qi,Yubing Qiu,Xingpeng Guo
Slippery lubricant-infused porous surfaces (SLIPSs) have attracted much attention in recent years due to their significant potential for wide applications in surface engineering. However, the depletion of lubricants severely limits the long-term durability of SLIPSs. Herein, we fabricate a durable SLIPS by covalently grafting a perfluoropolyethers (PFPE)-impregnated perfluorodecyltriethoxysilane (PFDTES) gel onto a UiO-66-NH 2 metal-organic framework (MOF) membrane to create a robust lubricant reservoir. It is worth noting that a similar polarity of PFDTES gel and PFPE enables PFPE to anchor onto the gel surface and within the crosslinked gel network via intermolecular forces, facilitating durable hydrophobicity. Meanwhile, the covalent grafting of a gel layer onto UiO-66-NH 2 membrane enhances the bonding strength for long-lasting stability. The resultant UiO-66-NH 2 based SLIPS exhibits the water repellency with water contact angle of ∼121° and sliding angle of ∼4°, performing satisfactory anti-fouling, anti-icing, self-cleaning, salt-tolerance and acid-/alkali-resistance properties. Electrochemical tests reveal a significant increase in corrosion resistance after PFPE infusion. The coating maintains stable hydrophobicity and provides sustainable corrosion protection during immersion in 3.5 wt.% NaCl aqueous solution and even 5 wt.% NaCl salt spray tests for over 12 weeks. This work would offer valuable insights into the multi-functional development of MOF-based protective coatings.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Lijuan Chang,Xianli Wang,Chengbin Liu,Hang Wen,Zhijie Zhang,Chunxia Yao
Perfluorooctanoic acid (PFOA) has attracted growing attention due to its widespread occurrence and harmful effects on humans. Owing to the strong C F bonds that confer inherent stability on PFOA, achieving efficient degradation via traditional photocatalysts is highly challenging. In this study, a UiO-66-NH 2 photocatalytic-persulfate (UiO-66-NH 2 /PS) integrated system was constructed to achieve high-efficiency PFOA removal, and its underlying mechanism was systematically revealed. A zirconium-based metal–organic framework, UiO-66-NH 2 , with readily tunable porosity was successfully synthesized via a solvothermal route, and its crystal structure, microstructure, and optical absorption behavior were confirmed through comprehensive characterizations. After optimization of the reaction parameters, the UiO-66-NH₂/PS system exhibited excellent PFOA degradation performance, with a markedly enhanced removal efficiency relative to the single UiO-66-NH 2 or persulfate system. The degradation efficiency of UiO-66-NH 2 /PS system in degrading PFOA was affected by ubiquitous anions and humic acid in water. Investigation of degradation pathways revealed that the cooperative action of photogenerated holes and SO₄• − /•OH radicals progressively cleaved the recalcitrant C F bonds, with short-chain perfluorocarboxylic acids (PFCAs) including perfluoroheptanoic acid (PFHpA, C 6 F 13 COOH), perfluorohexanoic acid (PFHxA, C 5 F 11 COOH), perfluoropentanoic acid (PFPeA, C 4 F 9 COOH), and perfluorobutyric acid (PFBA, C 3 F 7 COOH) identified as the main degradation intermediates. This study proposed a high-efficiency, economical and eco-friendly approach for the mineralization of PFOA, and meanwhile shed new light on the mechanism underlying the efficient degradation of PFOA by UiO-66-based photocatalysis combined with persulfate activation.
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JOURNAL OF MEMBRANE SCIENCE
·
2026
·
IF 8.8
Yinghe Ma,Guodong Yin,Zhongqi Li,Wenyi Wang,Ao Shen,Meiqi Ye,Yuxia Jia,Jinsong Suo
To tackle the critical challenge of efficient treatment for phenolic industrial wastewater, MXene@UiO-66-NH 2 composite powder was synthesized via a self-assembly approach. The powder was then immobilized on the surface of a PEI-modified PES substrate through vacuum filtration, thus successfully fabricating MXene@UiO-66-NH 2 /PES composite membranes. Characterizations including SEM, XRD and XPS confirmed that hydrogen bonds and weak coordination bonds formed between MXene and UiO-66-NH 2 . These interactions effectively suppressed the stacking of MXene and agglomeration of UiO-66-NH 2 , and constructed continuous electron transport pathways and ordered porous diffusion channels. The optimal performance was achieved when the UiO-66-NH 2 loading of 75 mg: cyclic voltammetry tests revealed high current density and favorable reversible redox behavior, and electrochemical impedance spectroscopy results indicated minimal charge transfer and diffusion resistance. In phenol degradation experiments, the degradation efficiency remained consistently above 90% within 5 h, and the composite membrane maintained excellent stability even after 72 h of cyclic operation. Active species quenching experiments verified that the core degradation mechanism of the composite membrane relies on the synergistic effect of superoxide radicals (·O 2 − ) and hydroxyl radicals (·OH): ·O 2 − initiated the initial activation of the benzene ring, while ·OH drove the subsequent deep oxidation and mineralization processes. This work realizes the integration of membrane separation and electrocatalytic degradation functions, breaks through the performance trade-off bottleneck of MXene-MOF composite membranes, and provides a novel and scalable preparation strategy for high-performance catalytic membranes, as well as technical support and a theoretical paradigm for the advanced treatment of phenolic industrial wastewater.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Yan Wang,Ranwen Ou,Le Zhang,Neng Yan,Wei Zhang
The development of highly efficient and sustainable adsorbents for arsenic removal is crucial for public health. Herein, we report a room-temperature, trifluoroacetic acid (TFA)-modulated approach for synthesizing defective UiO-66-NH 2 (denoted as UiO-66-NH 2 -X, where X is the TFA dosage) to achieve deep removal of arsenate [As(V)] from water. Optimizing the TFA dosage significantly improved the crystallinity, defect density, and textural properties of UiO-66-NH 2 -X, thereby enhancing its As(V) sorption performance. Among the UiO-66-NH 2 -X variants, UiO-66-NH 2 –8 effectively reduced As(V) concentrations (50–5000 μg·L −1 ) to below the safe drinking standard of 10 μg·L −1 with minimal secondary pollution. It exhibited rapid kinetics (> 99 % removal in 60 min), a broad working pH range (2−10), resistance to coexisting ions and humic acid interference, and good reusability (> 90 % over 6 cycles). According to Langmuir model, UiO-66-NH 2 –8 exhibited a maximum adsorption capacity of 151.51 mg·g −1 , surpassing many previously reported adsorbents. However, high-concentration As(V) induced substantial release of ATA from UiO-66-NH 2 –8, with concentrations ranging from 0.26 to 73.72 mg·L −1 , mirroring the trend of As(V) uptake. Linear regression analyses indicate a strong correlation ( R 2 = 0.97) between adsorbed As(V) and released linkers at concentrations ranging from 10 to 200 mg·L −1 . Mechanistic studies reveal that As(V) is primarily adsorbed through coordination with defect sites and electrostatic interactions below 5000 μg·L −1 . As the defect sites become saturated, the sorption mechanism shifts to ligand exchange at concentrations above 10 mg·L −1 . EXAFS analysis confirmed the formation of bidentate binuclear As Zr complexes on UiO-66-NH 2 –8. Practical application was demonstrated through fixed-bed column tests, where 100 mg of UiO-66-NH 2 –8 successfully treated ∼2.58 L of As(V)-spiked Yangtze River water to safe levels. This work provides a sustainable approach for designing defect-rich MOFs and demonstrates their strong potential fro practical arsenic remediation in natural water bodies.
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MICROPOROUS AND MESOPOROUS MATERIALS
·
2026
·
IF 4.7
ShuHuan Chen,Panweiyi Wang,Teshale Ayano Begeno,Afaq Nazir,ZhenXia Du,Shuping Qu
Luminescent metal-organic frameworks (LMOFs) have emerged as promising materials for optical sensing, owing to their tunable luminescent properties. However, most existing LMOF-based sensors rely on single-wavelength fluorescence intensity changes, which suffer from poor resistance to environmental fluctuations due to the absence of auxiliary reference signals, limiting their accuracy, especially for trace ammonia(NH 3 ) below the human olfactory threshold, which evades sensory perception yet poses long-term risks. To address this limitation, UIO-67-x where x denotes the molar ratio of terephthalic acid (H 2 BDC) to biphenyl-4,4`-dicarboxylic acid (H 2 BPDC) was designed. By optimizing the ligand ratio, UIO-67-0.2 was synthesized with well-defined crystallinity, large specific surface area and high fluorescence emission peak intensity. Its regular structure enables efficient encapsulation of rhodamine B (RhB) forming the dual-emission [email protected] platform. This platform has two adjustable emission peaks, both of which respond sensitively and synchronously to ammonia, thereby strengthening signal reliability and anti-interference capability through dual-channel synergistic verification. Notably [email protected] achieves an ultra-low NH 3 limit of detection (LOD) of 0.2 ppm, far below the olfactory threshold, and maintains remarkable stability after 5 cycles with stable reusability. Combining experiments and Density functional theory (DFT) calculations the quenching mechanism is clarified as the synergistic effect of static quenching and charge transfer. A [email protected] drop-cast film exhibits naked-eye distinguishable color change at 2.5 ppm NH 3 under 365 nm Ultraviolet(UV) light. It remains unchanged with other volatile organic compounds (VOCs) and shows concentration-dependent color gradation for semi-quantitative assessment. Furthermore, Digital conversion of fluorescence color signals via ΔE analysis enabled truly quantitative ammonia detection with a linear calibration curve ( R 2 = 0.968), eliminating the subjectivity of naked-eye judgment. This work develops a dual-mode LMOF for sub-olfactory-threshold NH 3 detection and informs anti-interference dual-emission platform design enabling on-site low-cost monitoring.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2026
·
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
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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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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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WATER AIR AND SOIL POLLUTION
·
2026
·Vol. 237
·期 12
·684
·
IF 3.5
Jing Xiaochun,Zhao Wei,Bei Pengzhi,Liu Hongjing,Dai Yan,Zhao Xu,Zhang Chengpeng,Shi Meiling,Zhang Ying
To advance CO 2 separation technologies, lysine-decorated UiO-66-NH 2 (LYS-UiO-66-NH 2 ) fillers were synthesized via a lysine modification and integrated into a Pebax-1657 matrix, yielding high-performance mixed matrix membranes. The carboxyl groups of the amino acids provide nucleophilic sites, promoting stronger interactions between LYS-UiO-66-NH 2 and CO 2 molecules. Moreover, the N–H and C = O bonds present in LYS-UiO-66-NH 2 facilitate hydrogen bonding with complementary C = O and N–H functional groups in the Pebax polymer backbone. These interactions significantly improve filler–polymer compatibility, enhancing interfacial adhesion and achieving uniform filler dispersion within the membrane matrix. Characterizations conducted via Fourier transform infrared spectroscopy, X-ray diffraction, differential scanning calorimetry, scanning electron microscopy, and thermogravimetric analysis confirmed successful synthesis of the LYS-UiO-66-NH 2 filler particles, exhibiting high crystallinity, uniform distribution within the polymer matrix, superior thermal stability, and absence of discernible interfacial defects. Compared to pristine Pebax membranes, the LYS-UiO-66-NH 2 /Pebax MMM containing 3 wt% filler exhibited a CO 2 permeability of 104.62 Barrer and a CO 2 /N 2 selectivity of 85.75 at 30℃ and 0.1 MPa, corresponding to increases of 74.16% and 75.61%, respectively, thereby surpassing the 2008 Robeson upper bound. This work demonstrates the considerable potential of the designed MMMs for highly efficient CO 2 separation.
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