INORGANIC CHEMISTRY
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2026
·
IF 4.7
Chaofeng Zhang,Yinhui Yi,Yong Zhao,Gangbing Zhu
This study prepared UiO-66-NH2 MOFs embedded with Ru-tris(2,2′-bipyridyl)(II) hybrids as a nanozyme (designated as Ru/UiO-66-NH2) to propose a bioenzyme-free homogeneous electrochemical (HEC) sensing strategy for detecting organophosphorus pesticides (OPs). Experimental investigation coupled with density functional theory calculation demonstrated that the Ru incorporation significantly amplifies the peroxidase-like (POD-like) activity of UiO-66-NH2 MOFs and that the Ru/UiO-66-NH2 nanozyme exhibits selective responsiveness to coordinate with the OP molecules. Upon OP exposure, the specifical coordination between OPs and MOF structure effectively inhibits the nanozyme’s activity. Utilizing o-phenylenediamine as the catalytic substrate and glyphosate as a model of OPs, the optimized HEC sensor achieves an extensive linear detection range (0.5–10,000 ng/mL) and a low detection limit of 0.13 ng/mL as well as satisfactory recoveries in the real samples of tomato extract and water. It is expected that this innovative bioenzyme-free HEC sensing strategy represents a promising advancement for practical OP residue analysis with potential applications in various fields.
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Molecular Catalysis
·
2026
·
IF 4.3
Pengfei Zhu,Longshuai Sun,Maoying Wang,Guanyu Feng,Youyou Ma,Chuanyi Wang,Prasert Reubroycharoen
Photocatalytic CO 2 reduction has been widely recognized as an exceptionally promising technique for converting carbon dioxide into high-value-added chemicals. Metal-organic frameworks (MOFs) have emerged as promising photocatalysts for visible-light-driven CO 2 reduction owing to their unique structural advantages, but the achieved efficiency is still not satisfying. Herein, we successfully constructed CdS/UiO-66(Ce) Z-Scheme heterojunction photocatalysts by in situ growth of CdS nanoparticles on an octahedral UiO-66(Ce) substrate. The morphology, physicochemical properties, and photoelectric characteristics of the prepared samples were systematically characterized in detail. Photocatalytic activity results indicated that the prepared heterostructure could efficiently reduce CO 2 to CO, and its activity was significantly superior to that of pristine UiO-66 (Ce) and CdS. Under illumination of visible light, the optimal as-prepared sample achieved a CO yield of 134.3 μmol g −1 h −1 , which was 168.6 and 2.62 times higher than that of pure UiO-66(Ce) and CdS, respectively. The reinforced photocatalytic CO 2 reduction to CO activity can be ascribed to the obviously improved visible-light harvesting and effectively facilitated the separation and migration of photogenerated charge carriers via a Z-scheme charge transfer. This study may well present a novel design strategy of highly efficient MOFs-based Z-scheme photocatalytic systems for photocatalytic CO 2 reduction.
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JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2026
·
IF 6.7
Yifan Chen,Runqing LV,Zhenmao Chen,Sifan Wang,Xuan Zheng,Xiaohui Dai,Feng Gao,Qingxiang Wang
A hemin (Hm)-engineered cerium-based metal–organic framework (MOF), UiO-66(Ce)@Hm, was prepared and used as a nanozyme for electrochemical sensing of hydrogen peroxide (H2O2) and dissolved hydrogen (H2) in beverages. UiO-66(Ce)@Hm showed enhanced electrocatalytic activity toward H2O2 because of the synergistic catalytic effects of Hm and UiO-66(Ce). The resulting sensor enabled H2O2 detection from 0.5 to 250 μM with a detection limit of 0.32 μM, and was successfully applied to milk analysis. In addition, dissolved H2 in hydrogen-rich water (HRW) promoted the catalytic conversion of o-phenylenediamine/H2O2 to electroactive 2,3-diaminophenazine, allowing H2 determination from 45 to 900 μM with a detection limit of 26.2 μM. These results demonstrate the potential of UiO-66(Ce)@Hm for food safety monitoring and quality assessment of HRW beverages.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2026
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IF 3.9
Jintao Liu,Dekun Duan,Monan Wang,Jinghan Wang,Weixue Zhang,Yue Zhang,Qiuli Zhang,Gan Ye
Abstract Catechol-functionalized UiO-66(Zr) holds considerable promise for targeted catalytic transformations owing to its distinctive electronic and structural properties. However, the direct synthesis of such frameworks has remained a persistent synthetic challenge. Herein, we report a rational, solvent-free, one-pot synthetic strategy enabling precise control over catechol functionalization in UiO-66(Zr) (UiO-66(Zr)-(OH)2) with well-defined hierarchical porosity. The optimized UiO-66(Zr)-0.25(OH)2 displays markedly improved catalytic performance in the esterification of levulinic acid (LA) with primary alcohols to yield alkyl levulinates. This superior activity arises synergistically from three key features: (i) increased Brønsted acidity imparted by the ortho-dihydroxyphenyl groups; (ii) a hierarchical pore architecture that enhances mass transport and substrate accessibility; and (iii) strong adsorptive affinity for both LA and alcohol substrates. Under standardized 12 h batch reactions with an alcohol-to-LA molar ratio of 20 and 50 mg of catalyst, UiO-66(Zr)-0.25(OH)2 achieves LA conversions of 98.9, 97.9, 95.6, and 94.3% with methanol, ethanol, 1-propanol, and 1-butanol, respectively, while maintaining >99.9% selectivity for the corresponding products of alkyl levulinates at optimally tuned reaction temperatures (60, 70, 80, and 100 °C). This work establishes a practical and environmentally sustainable synthetic strategy for the rational design of functionalized metal–organic frameworks, enabling high-efficiency, heterogeneous catalysis in targeted reactions.
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APPLIED ORGANOMETALLIC CHEMISTRY
·
2026
·Vol. 40
·期 5
·e70579
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IF 4.3
Changqing Xia,Zhengshen Bao,Dehong Xu,Shixing Wang,Weili Li
A robust metal–organic framework (MOF) material, UIO67-PS, was synthesized by grafting sulfonic acid groups onto the UIO67-NH 2 framework. This modification significantly enhances the electronegativity and coordination-site density on the MOF surface, enabling threefold higher Au (III) adsorption capacity (536.4 mg/g at pH 2.0 temperature 25°C and agitation speed 120 rpm) compared to pristine UIO67-NH 2 (168.4 mg/g). The material exhibits exceptional acid resistance and recyclability (91% capacity retention after three cycles). Density functional theory (DFT) calculations and X-ray photoelectron spectroscopy (XPS) analyses reveal that the adsorption mechanism is governed by synergistic electrostatic interactions and chelation, wherein electron-rich oxygen/nitrogen-containing functional groups on the adsorbent surface coordinate with metal ions via covalent bonds to form stable five-membered ring complexes. Kinetic studies confirm rapid adsorption equilibrium (< 240 min), while thermodynamic analysis indicates an endothermic, entropy-driven process. Notably, UIO67-PS demonstrates superior selectivity for Au (III) over competing ions (e.g., Zn 2+ and Cu 2+ ) in simulated e-waste leachates. Achieving removal rates as high as 80% in real metallurgical wastewater highlights its potential for practical application. This work reveals key coordination interactions, including complexation and electrostatic attraction, within a simulated e-waste leachate system containing competing ions such as copper and nickel. These insights advance the design strategies of MOFs for sustainable Au (III) recovery and provide a scalable platform for industrial wastewater treatment, contributing to environmental protection and the sustainable utilization of critical material resources.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Xi Lin,Runyu Liu,Jinqing Zhang,Dandan Xu,Tiecheng Liu,Kang Tang,Jinglan Wang,Beibei Yan,Guanyi Chen,Zhanjun Cheng
The development of efficient photocatalysts for solar-driven H 2 evolution relies on precise charge management. A novel ternary heterojunction photocatalyst, 1%Co@ZnIn 2 S 4 /UiO-66 (1%Co@ZU), was synthesized through a collaborative sequential self-assembly and photodeposition strategy. In photocatalytic water splitting for H 2 evolution, 1%Co@ZU achieved a H 2 evolution rate of 46.40 mmol·g −1 ·h −1 , with apparent quantum efficiency (AQE) of 86.32% at 420 nm. An S-scheme heterojunction between UiO-66 (UiO) and ZnIn 2 S 4 (ZIS) promoted efficient charge separation. Co S bonds directed the rapid transfer of electrons from ZIS to Co. Electrons were enriched on Co sites, and the energy barrier was reduced quickly. The optimal free energy of H* adsorption (ΔG H⁎ ) was 0.14 eV. This study demonstrates the crucial role of band alignment and interface design in high-performance photocatalytic systems for application in H 2 evolution and other energy conversion fields. Download: Download high-res image (140KB) Download: Download full-size image
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MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Liqian Niu,Xian Wang,Xinxin Liu,Xin Guan,Xinyu Fan,Xin Liu,Shiyue Niu,Shuyun Bi
A novel UiO-66/Leu/Au@AgNPs SERS substrate was fabricated for chlorthiamid detection. • A low LOD of 1.95 × 10 −9 mol L −1 and wide linear range were obtained for chlorthiamid. • The sensor showed good stability, repeatability, and high anti-interference ability. • Good recoveries in real samples confirmed its practical use in food safety analysis. A novel surface enhanced Raman scattering (SERS) substrate, UiO-66/Leu/Au@AgNPs, was fabricated by assembling gold@silver core-shell nanoparticles (Au@AgNPs) with leucine (Leu) and the zirconium-based metal-organic framework (MOF) (UiO-66). Various techniques including SEM, TEM, HAADF-STEM, XRD, XPS, FT-IR, TGA, UV–Vis, and Zeta potential were employed to fully characterize the substrate of UiO-66/Leu/Au@AgNPs. The substrate of UiO-66/Leu/Au@AgNPs achieved remarkable Raman signal amplification for chlorthiamid. Both electromagnetic enhancement (EM) and chemical enhancement (CM) mechanisms significantly boosted the distinct and reproducible Raman signal of chlorthiamid. The determination of chlorthiamide was not interfered by fourteen types of pesticides and several common metal ions, demonstrating the good selectivity of this method. The linear regression equation was expressed as I SERS = 128.08 c + 288,613.27 ( R 2 = 0.9982), The linear range spanned three orders of magnitude (from 3 × 10 −9 to 1 × 10 −6 mol L −1 ). A low limit of detection (LOD) of 1.95 × 10 −9 mol L −1 was obtained. The proposed method was further utilized for the determination of chlorthiamid in real samples, giving recoveries between 96.4% and 105% ( n = 5). Download: Download high-res image (118KB) Download: Download full-size image
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CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2026
·
IF 3.5
Mi Yan,Cao Miao,Teng Cang,Xiangzhi Kong,Yan Zhang,Shuai Liu,Dan Wang,Ekkachai Kanchanatip
UiO-66 MOF was functionalized with dual ligands namely BDC-NH 2 and BDC-(OH) 2 . • Selective CO 2 /CH 4 adsorption were investigated at atmospheric and high pressures. • The highest CO 2 /CH 4 selectivity of 35.60 was achieved with 10%H-ZrMOF-A adsorbent. • CO 2 adsorption capacity of the adsorbent remained over 91.5% after five reuses. Selective CO 2 /CH 4 separation is essential for biogas valorization, yet conventional adsorbents typically face a trade-off between adsorption capacity and selectivity. In this work, a dual-ligand engineering strategy is implemented on UiO-66-NH 2 (ZrMOF-A) by co-incorporating 2,5-dihydroxyterephthalate (BDC-(OH) 2 ) to create a series of mixed-ligand MOFs denoted X %H-ZrMOF-A ( X = 5%–50% (mass)). The materials were synthesized via a solvothermal route and systematically characterized by N 2 physisorption, powder X-ray diffraction, FTIR spectroscopy, and SEM to elucidate structure-property relationships. Increasing hydroxyl content progressively modified surface area, pore volume, and morphology, with excessive BDC-(OH) 2 loading (>30% (mass)) inducing pronounced structural degradation. Among the series, 10%H-ZrMOF-A exhibited the most favorable balance between textural properties and functional site density, achieving a CO 2 uptake of 1.352 mmol·g –1 and a CO 2 /CH 4 selectivity of 35.60 at 100 kPa and 25 °C for a 40:60 CO 2 :CH 4 mixture predicted by IAST. Multi-model isotherm analysis identified the Freundlich and Elovich models as the most suitable descriptions of CO 2 adsorption, confirming a heterogeneous adsorption landscape arising from the coexistence of amine and hydroxyl sites. Complementary DFT calculations showed that dual functionalization strengthens CO 2 binding while weakening CH 4 interactions, consistent with the experimentally observed enhancement in selectivity. Pressure-dependent measurements revealed that high CO 2 /CH 4 selectivity at low pressures (≤100 kPa) diminishes at elevated pressures as non-selective pore filling becomes dominant, indicating that 10%H-ZrMOF-A is particularly suited for low-pressure biogas upgrading and post-combustion CO 2 capture. Five consecutive adsorption-desorption cycles demonstrated 91.5% capacity retention, confirming moderate short-term recyclability under mild thermal regeneration conditions. Download: Download high-res image (204KB) Download: Download full-size image
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Journal of Materials Chemistry A
·
2025
·
IF 9.5
Huimin Zhang,Yu Liu,Qi Li,Xinlu Zhao,Mingze Sun,Jiaxin Hou,Chuanyu Guo,Chaobo Huang,Xiaoli Cheng,Lihua Huo,Minghui Yang,Yingming Xu
High-performance humidity sensors have significant potential applications in areas such as smart homes and digital healthcare, but the limited humidity sensing performance of materials hinders their practical application. One major challenge in enhancing the sensing performance of humidity-sensitive materials is the effective regulation of oxygen vacancy content within their crystal structures. In this study, we propose a dual regulation strategy of “ligand induced-pyrolysis synergy” to control the oxygen vacancy content effectively. Specifically, Metal–Organic Framework (MOF) materials containing oxygen vacancies were synthesized using a monocarboxylic acid conditioning method. We further increased the oxygen vacancy content in the MOF derivatives by adjusting the heat treatment temperature. The prepared U6C-20-400 sensor demonstrated excellent performance across a wide humidity range of 3–97% relative humidity (RH), with a rapid response/recovery time of just 0.5 s and 1.2 s. Furthermore, it effectively monitored food as it transitioned from raw to cooked and even burnt during cooking. This study offers valuable insights for developing high quality humidity sensors tailored for next-generation smart home applications.
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RSC Advances
·
2026
·Vol. 16
·期 2
·1202-1211
·
IF 4.6
Qiuyun Huang,Shiyu Liu,Weihua Shen,Yunjin Fang
For the carbonylation of methyl nitrite (MN) to dimethyl carbonate (DMC), a series of Ce(x)-UiO-66 were synthesized and utilized as supports for Pd/Ce(x)-UiO-66 catalysts. The characteristics of the carriers were investigated using XRD, SEM, TG, NH3-TPD and BET analyses. The results showed that doping cerium in the UiO-66 significantly enhanced the catalytic activity by improving the surface area, acidity and CO adsorption of the catalysts. Ce(0.1)-UiO-66, with the highest thermal stability (547.26 °C), presented the highest catalytic stability in DMC synthesis. It was proven that the damage of CO and the migration of Pd atoms occurred due to the replacement of ligands and metal clusters, which led to catalytic deactivation.
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Desalination and Water Treatment
·
2024
·
IF 1
Sheng Feng,Guiliang Zhu,Lili Cao,Runbai Wang,Shuguang Liu
In the work, the layered TiO 2 NS/UiO-66/GO composites were successfully prepared through an in-situ method. Two-dimensional TiO 2 NS combined with UiO-66/GO to form a layered structure. The prepared samples were characterized by X-ray diffraction, thermogravimetric analysis, Brunauer–Emmett–Teller test, scanning electron microscopy, energy dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, UV–Vis DRS and PL spectra. TiO 2 NS/40%UiO-66/GO exhibited the most efficient adsorption (20 and 1.3 times those of TiO 2 NS and UiO-66/GO, respectively) through absorbing Congo red (CR). It also displayed the strongest photocatalytic activity (29 and 2 times those of TiO 2 NS and UiO-66/GO, respectively) for degrading CR dye under visible-light irradiation (λ ≥ 420 nm). The removal rate of CR was nearly 100%. Besides, TiO 2 NS/40%UiO-66/GO showed excellent stability even after four cycling runs of adsorbing and photodegrading CR. The results showed that TiO 2 NS/UiO-66/GO composites were highly efficient adsorption and catalytic bifunctional materials. TiO 2 NS/UiO-66/GO composites provide an important basis for combining metal organic frameworks/GO with photocatalytic semiconductors to improve absorption and photocatalytic performance to better treat organic wastewaters.
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CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Liangjie Wang,Xianghua Wen,Juan Li,Ping Zeng,Yonghui Song,Huazhong Yu
Recently, UiO-66 type metal organic frameworks (MOFs) have been studied as adsorbents for phosphate removal from wastewater; however, the adsorption mechanism with different concentrations of phosphate, especially the roles of defects and linker exchange, are not entirely clear. In this work, the phosphate adsorption mechanism in HCl-UiO-66 and HCl-NH 2 -UiO-66 were examined by testing the relationship between the adsorbed phosphate and released linker in the adsorption process. Adsorption kinetics studies (3.0 mM phosphate solution) and adsorption isotherm analyses (0.3–6.0 mM phosphate solution) revealed highly linear relationships (R 2 = 0.8949–0.9978) between the adsorbed phosphate and released linker for both adsorbents. Further analysis showed that when the adsorbed phosphate was lower than 0.56 mmol/g for HCl-UiO-66 and 0.51 mmol/g for HCl-NH 2 -UiO-66, phosphate was preferentially adsorbed on the defect sites in the MOFs with no linker release. However, when the adsorbed phosphate exceeded these levels, the defects were saturated by phosphate and linker exchange became the major adsorption mechanism. Based on density functional theory calculations, the obtained strengths of the linkers (H 2 BDC: Terephthalic acid; NH 2 -H 2 BDC: 2-Aminoterephthalic Acid; NO 2 -H 2 BDC: 2-Nitroterephthalic Acid) and phosphate species as Lewis bases fall in the order, PO 4 3- > HPO 4 2- > NH 2 -BDC 2- > BDC 2- > H 2 PO 4 - > NO 2 -BDC 2- > H 3 PO 4 , which clearly evidences why linkers can be exchanged by phosphate. Given the propensity for ligand exchange and the resulting structural destabilization, UiO-66 type MOFs is not suggested as ideal adsorbents for phosphate removal from wastewater with high phosphate concentrations.
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