CHEMICAL ENGINEERING JOURNAL
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2025
·
IF 13.2
Jinlong Li,Zihuan Zhao,Qihang Wei,Hongman Hou,Gongliang Zhang,Jingran Bi
This study integrates UiO-66-COOH metal–organic frameworks (MOFs) with pectin (Pec) to precisely release potassium cinnamate (PC) to develop a pectinase-responsive active fruit-preservation system (UiO-66-COOH@PC/Pec). Carboxylated UiO-66 with nanoporosity was fabricated to achieve a high loading amount of PC (235 mg·g −1 ) via the synergistic effects of hydrogen bonding, as shown by the loading kinetics and reduced density gradient analyses. A gatekeeper was established by grafting Pec onto the surface of the MOF (UiO-66-COOH@PC/Pec), thereby “locking” PC to prevent leakage. Moreover, an enzyme-responsive controlled-release behavior was developed under pectinase stimulation, achieving up to 95 % PC release within 9 h through Fickian diffusion and only 25.3 % in enzyme-free conditions by non-Fickian diffusion and matrix erosion. With significant long-term inhibiting activity against both bacteria and fungi, UiO-66-COOH@PC/Pec successfully extended the shelf life of strawberries from 2 to 5 days at 25 °C. Moreover, UiO-66-COOH@PC/Pec exhibited good water solubility and negligible toxicity, indicating that it can be easily removed from fruit surfaces and offers high consumer acceptance. These results provide a novel MOF-based controlled-release strategy for smart food-packaging applications.
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JOURNAL OF SOLID STATE CHEMISTRY
·
2021
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IF 3.498
Meimei Zhou,Wei Zou,Xuemei Zhu,Huachen Ma,Pengbo Wang,Jiaxin Shang,Pingping Luo
UIO-66-NH 2 was successfully deposited on electrospun polyacrylonitrile (PAN) nanofibers treated by thermal oxidative stabilization (TOS) via a simple and effective in situ growth method. Owing to the formation of acridone rings, naphthyridinering rings and hydronaphthyridine rings during the TOS process, the thermally stabilized electrospun PAN (TSPAN) nanofibers were greatly improved in stability and heat resistance and could provide adequate nucleation points for MOFs growth, indicating an ideal MOFs deposition support without additional surface modifications. The results demonstrated that UIO-66-NH 2 crystals distributed relatively uniform and dense on the TSPAN nanofibers with mass loading up to 28.1 wt%. Compared with powdered UIO-66-NH 2 , the formed UIO-66-NH 2 @TSPAN nanofibers showed enhanced visible light driven photocatalytic activity towards reduction of Cr(VI) due to the improvement of visible light response, more excellent photothermal conversion ability and the increase of exposed active sites. The photocatalytic reduction rate of Cr(VI) over UIO-66-NH 2 @TSPAN was up to 93% within 180 min and the rate constant (k = 0.1362) was 2.3 times that of powdered UIO-66-NH 2 (k = 0.00576). Significantly, the mechanical flexibility and structural stability endowed the nanofibrous photocatalyst easy operation and outstanding reusable capability. The photocatalytic activity for Cr(VI) reduction still preserved 90% after five cycles. This work proposes a facile strategy for preparation of free-standing MOFs nanofibers and provides MOFs-based photocatalysts a new opportunitie for broad applications in water treatment.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
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IF 9.1
Wei-Guang Yang,Xin-He Feng,Xuwen Wu,Zhong-Zhen Yu,Dongzhi Yang
Two typical chemical warfare agents—nerve agents and blister agents—pose a serious threat to human life. Under atmospheric conditions devoid of free water, however, the rapid degradation and complete elimination of these agents using anhydrous catalysts remain significant challenges. To overcome this limitation, a LiCl+AC-MOF composite catalyst with moisture-induced wetting surface is prepared by in-situ growing UiO-66-NH 2 on the activated carbon particles, and then confining LiCl crystallization in the nanocavities of UiO-66-NH 2 . In humid atmosphere (RH = 90%), the confined LiCl undergoes deliquescence within the UiO-66-NH 2 nanocavities, thereby generating a continuous wetting surface. This mechanism yields an impressive water uptake of 1.61 g g −1 , which significantly enhances the equilibrium water content at the gas-solid boundary of the composite catalyst. Leveraging the abundance of free water to the Zr sites, the composite catalyst facilitates the rapid hydrolytic degradation of the nerve agent simulant dimethyl 4-nitrophenyl phosphate with a half-life of 1.9 h at RH = 90%. For the blister agent simulant 2-chloroethyl ethyl sulfide, the catalyst not only cleaves the C S and C Cl bonds but also utilizes its wetting surface to accelerate the recombination of intermediate into final products (half-life = 0.4 min at RH = 70%). In summary, the highly efficient catalyst designed in this work spontaneously harvests atmospheric moisture to create a self-wetting surface. This distinctive surface chemistry enhances both the mass transfer of chemical warfare agent simulants and their subsequent active degradation at Zr sites, thereby substantially broadening the design scope for advanced chemical protective materials applicable to next-generation respirators and gas masks.
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Food Frontiers
·
2026
·Vol. 7
·期 4
·e70334
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IF 6.3
Zongda Li,Yukun Zhang,Youning Zhang,Yu Zhang,Jiangxia Xu,Fanxing Meng,Minwei Zhang
Combining high-electroactive nanomaterial with enzyme immobilization, the development of the electrochemical biosensor is a frontier approach to improve the sensitivity and selectivity for the detection of organophosphorus pesticides (OPs). In this study, a core–shell nanostructure (Ag-HMPB@UiO-66) was prepared with the Ag-HMPB as a core and a UiO-66 forming the shell as an advanced platform for acetylcholinesterase (AChE) immobilization. The innovation lies in the synergistic integration of the excellent electron transfer capability of Ag-HMPB with the good structural stability of UiO-66. Based on Lewis acid–base theory, the form of Zr─O─P coordination bond could improve the efficiency of aptamer (Apt) immobilization (131.65 nM mg −1 ) compared with physical adsorption. Electrochemical analysis revealed that the as-prepared biosensor exhibited exceptional substrate affinity, with a low K m of 0.234 mM. Under optimized conditions, the biosensor exhibited sensitive detection of trichlorfon over a wide range (1 × 10 −13 to 2.5 × 10 −9 g L −1 ), with a low LOD of 0.44 pg L −1 (3σ/slope). Additionally, the biosensor can also be applied to the cucumber with good recovery (97.34% to 103.35%), as well as good storage stability and reproducibility. This provides a reliable and powerful tool for the trace detection of OPs in complex agricultural products.
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TALANTA
·
2026
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IF 6.7
Wanyi Zhang,Chenyu Zhou,Hanbo Wang,Yuhan Chen,Tingting Xia,Xingguang Su
Quercetin, a potent natural antioxidant, is gaining widespread attention for its remarkable health benefits, including the prevention of cardiovascular diseases, allergies, diabetes, and cancer. As a promising functional food ingredient, there is an urgent need for fast, sensitive, and portable methods to monitor quercetin levels in various products. In this study, we present a portable dual-mode nanozyme-driven sensor based on cerium dioxide nanoparticle-anchored metal-organic framework (CeO 2 @UiO-66-NH 2 ) nanocomposite. This nanocomposite exhibits impressive oxidase-like activity and intrinsic fluorescence properties, enabling it to catalyze the oxidation of colorless N, N-diethyl-p-phenylenediamine to a pink product, which in turn quenches the fluorescence of CeO 2 @UiO-66-NH 2 at 458 nm via an inner filter effect (IFE). The presence of quercetin inhibits reactive oxygen species generation, thus attenuating the oxidation and restoring fluorescence. A paper-based fluorescent-colorimetric dual-mode sensing platform was established for quercetin detection, enabling rapid and visual evaluation without complex instruments. The proposed method exhibited a broad linear response range of 1-60 μM. The limits of detection for the colorimetric/fluorescent and paper-based colorimetric/fluorescent were 0.35, 0.27, 0.37, and 0.29 μM, respectively. This dual-mode sensor demonstrates excellent analytical sensitivity and selectivity, with successful application in real vegetable and juice samples, offering a reliable, efficient tool for quercetin monitoring in food and functional food ingredients.
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FOOD CHEMISTRY
·
2026
·
IF 10.4
Xueqin Sun,Yan Fan,Jiacheng Liu
A novel of ratiometric fluorescence sensor Eu 3+ @UiO-67-TFSA with pre-concentration effect was fabricated by PSM. • The prepared Eu 3+ @UiO-67-TFSA exhibited high selectivity and sensitivity toward OFL. • The possible sensing mechanism of Eu 3+ @UiO-67-TFSA for OFL was systematically studied. • The Eu 3+ @UiO-67-TFSA paper sensor with smartphone allowed on-site visual rapid OFL detection. The excessive use of ofloxacin (OFL) has led to its persistent residues in water sources and animal-derived foods, posing a threat to human health. Therefore, it is urgent to develop fluorescent sensing materials capable of detecting ofloxacin in water environments and food matrices. Herein, a novel Eu 3+ @tetrafluorosuccinic acid-functionalized ratiometric fluorescent material Eu 3+ @UiO-67-TFSA was prepared by a two-step post-synthetic modification of UiO-67. In the concentration range of 1–15 μM, the Eu 3+ @UiO-67-TFSA had a limit of detection (LOD) of 0.42 μM for OFL, which was approximately 3.90 times lower than that of the non-fluorinated Eu 3+ @UiO-67-SA (LOD = 1.64 μM). The improved sensing performance could be attributed to the pre-concentration effect provided by the Eu 3+ @UiO-67-TFSA. The possible detection mechanism was systematically elucidated through relevant experiments and density functional theory (DFT) calculation. Moreover, the constructed smartphone-assisted visual sensing platform was successfully applied to detect OFL in actual food samples and real water environment samples. A novel ratiometric fluorescent sensor Eu 3+ @UiO-67-TFSA was synthesized through two-step PSM. The preparation of Eu 3+ @UiO-67-TFSA enabled effective detection of OFL via ratiometic fluorescence signals, with a detection limit as low as 0.42 μM, which was approximately 3.90 times lower than that of the non-fluorinated Eu 3+ @UiO-67-SA. The improved sensing performance could be attributed to the pre-concentration effect provided by the as-obtained Eu 3+ @UiO-67-TFSA. Furthermore, the fluorescent test strips based on Eu 3+ @UiO-67-SA was combined with smartphone to realized on-site, visual and rapid detection of OFL. Download: Download high-res image (286KB) Download: Download full-size image
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Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 5
·124516
·
IF 7.5
Bingkun Liu,Juncheng Guo,Hongda Huang,Yuhan Yang,Jingtao Zhang,Junling Zhang,Yonghui Zhang
Constructing a robust interfacial electric field is crucial for efficient spatial separation and directional migration of photogenerated carriers, which further boosts the performance of photocatalytic systems. In this study, a novel CF-supported SnS 2 /UiO-66-NH 2 high-low junction with intimate interface was fabricated via an in-situ solvothermal process. The optimal CF@SnS 2 /UiO-66-NH 2 -2 catalyst shows the best photocatalytic efficiency of 99.5% Cr(VI) removal at pH of 2.0 and nearly complete E. coli inactivation within 150 min, revealing its good photocatalytic redox capability. Moreover, the as-prepared composite possesses remarkable stability and desirable recycling performance. Mechanism analysis reveals that the intense internal electric field (IEF) and energy band bending are pivotal for promoting the separation and migration of charge carriers in the CF@SnS 2 /UiO-66-NH 2 high-low junction. This work offers new insights into the preparation and application of high-low junction photocatalysts.
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DESALINATION
·
2025
·
IF 9.8
Kim-Sinh Nguyen-Thi,Eunmok Yang,Anh-Dao Le-Thi,Chang-Min Kim,Changwoo Kim,In S. Kim
As climate change exacerbates the global water crisis, desalination is becoming vital for acquiring clean water from plentiful brackish and seawater sources. Notably, interlayer thin-film nanocomposite membranes used in reverse osmosis and nanofiltration stand out as key innovations. These advanced membranes are drawing interest due to their remarkable performance, attributed mainly to their capability to create thinner selective layers in thin-film composite structures. This study introduces a novel methodology combining UiO-66-(COOH) 2 with tannic acid complexes as an interlayer to enhance filtration performance for reverse osmosis application. Various characterization methods were employed to validate this innovative approach. The techniques confirmed both the unique morphology of the membrane and the impact of tannic acid UiO-66-(COOH) 2 complexes on the polyamide membrane. Additionally, filtration tests showed notable enhancements in membrane performance, with salt permeance dropping from 0.47 LMH for the control membranes to an impressive 0.28 LMH for the membrane with tannic acid UiO-66-(COOH) 2 complexes. Permeance also increased substantially from 1.08 to 1.65 LMH/bar. A five-day stability test conducted under high-pressure conditions highlighted the durability and excellent properties of the membranes. This research showcases a promising and inventive strategy for improving the efficacy of desalination membranes, which has the potential to transform water purification technologies.
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FUEL
·
2026
·
IF 7.5
Muhammad Kashif Majeed,Rashid Iqbal,M.Umar Majeed,Muhammad Akram,M.Zeeshan Ashfaq,Adil Saleem
Heterogeneous catalysis is highly desirable for the self-condensation of cyclohexanone, an important step in producing intermediates for fine chemicals and polymers. Conventional methods often rely on toxic reagents and long reaction times, limiting their industrial viability. In this study, Zr- and Hf-based metal–organic frameworks (UiO-66 and NUS-6) were developed as efficient, environmentally friendly catalysts for the self-condensation of cyclohexanone. Their high surface area and hierarchical porosity, combined with bifunctional Brønsted and Lewis acid sites introduced through partial linker substitution, enable excellent catalytic performance. UiO-66(Zr) achieved 81 % conversion in 6 h and 98 % in 48 h, while NUS-6(Zr) reached 85 % and 86 % under the same conditions, with high selectivity toward the desired dimer products. The catalysts also showed strong thermal stability and reusability, maintaining activity at elevated temperatures. This work demonstrates a sustainable catalytic pathway for cyclohexanone dimerization, avoiding corrosive chemicals while offering both efficiency and selectivity.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2026
·
IF 8.7
Xinru Liang,Yali Liu,Changde Song,Jinliang Ning,Chuanfang Zhao,Jiawen Li,Baiyi Zu,Xincun Dou
CNF biomacromolecules were developed as green MOF modulators. • Defective nanosized MOF with enhanced fluorescence activity was successfully prepared. • ICT effect modulation enables sensitive organophosphorus pesticide detection. • Food-grade multifunctional fruit coating was constructed via cellulose self-assembly. • The work offers new insight into cellulose high-value use in food & agricultural safety. Biomass-derived polysaccharide macromolecules have emerged as sustainable, biocompatible functional materials for green agricultural and food applications, owing to their tunable surface groups, self-assembly properties and environmental friendliness. MOFs hold great sensing potential for their superior structural properties, while pure MOFs have critical flaws (severe agglomeration, low mass transfer, poor specificity/stability) in practice, limiting their broader deployment. To address this challenge, a general strategy for structural regulation of UiO-66-OH using green and sustainable carboxylated cellulose nanofibrils (CNFs, a typical linear polysaccharide biomacromolecule) as the sole biogenic modulator and nano-template was proposed. Driven by the competitive coordination and nano-templating effects of CNFs, the defective nanosized UiO-66-OH features abundant active sites and amplified fluorescence signals, modulating the intramolecular charge transfer (ICT) effect for sensitive pesticide detection. In the presence of the target analyte, a distinct fluorescence enhancement was achieved, with an LOD of 1.40 μg/kg (far below the international glyphosate MRL of 0.1 mg/kg in grains) and robust anti-interference against 17 common interferents. Additionally, leveraging the self-assembly properties of CNFs polysaccharide, a food-grade multifunctional fruit coating was fabricated via spray coating, enabling in-situ visual monitoring of pesticide residues and fruit freshness, pesticide degradation, and long-acting fruit preservation. This work offers a rational material design insight and technical support for high-value utilization of cellulose-based biomacromolecules, as well as the green governance of agricultural pesticide residues and high-efficiency fruit preservation. Download: Download high-res image (179KB) Download: Download full-size image
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FOOD CHEMISTRY
·
2026
·
IF 10.4
Ruyue Zhang,Xuan Liu,Bini Wang,Fuxin Zhang,Yufang Liu
Lactoferrin (LF) is widely used in healthcare and food industry as an antibacterial and functional additive. Its complex structure makes rapid detection challenging. Here, an antibody-free molecularly imprinted (MIP) electrochemical sensor was developed using Ti 3 C 2 MXene and UiO-66-NH 2 nanomaterials to construct an imprinted layer for the rapid and efficient detection of LF in dairy products. The incorporation of Ti 3 C 2 MXene@UiO-66-NH 2 @PPy (TiPU) enhanced the surface area and conductivity of the material, and MIP provided specific cavities that were precisely matched to LF in terms of size, shape, and chemical functional groups. Molecular docking simulations confirmed the reliability of LF MIP compound formation. The synthesized nanocomposites (MIP-TiPU) were characterized by various methods, including their morphology, structure, and electrochemical properties. The MIP-TiPU modified electrochemical sensor displayed an outstanding sensing performance for LF detection, with a wide linear response range from 5 ng/mL to 500 ng/mL and a low detection limit (0.98 ng/mL).
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INDUSTRIAL CROPS AND PRODUCTS
·
2023
·
IF 5.9
Na Li,Huan Xia,Shiyuan Liu,Junjiang Teng,Yanbin Jiang
In order to improve the activity and reusability of β-xylosidase, the β-xylosidase mutant S160N-R333H (R333H) which could convert notoginsenoside R1 to ginsenoside Rg1 and xylose was immobilized on the metal-organic framework (MOF) UiO-66-NH 2 . The physical and biochemical properties of immobilized β-xylosidase ( [email protected] 2 ) were studied in detail. The results showed improved performances, i.e. the high immobilization yield of 93% and recovery activity of 192.8%, better stability under acidic or trypsin-containing conditions, the higher activity in the reaction containing ions , and the improved catalytic efficiency (was 1.37-fold than that of free R333H). Importantly, the ginsenoside Rg1 yields remained more than 80% after six recycles in McIlvaine buffer and pure water. The UiO-66-NH 2 could catalyze xylose dehydration to produce furfural and the yield reached 69%. Thus this study provides a promising method for production of bioactive or platform chemicals via continuous conversion of xyloylated substrates using nanocatalyst synthesized by β-xylosidase and MOF.
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