CHEMICAL ENGINEERING JOURNAL
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2025
·
IF 13.2
Kaili Gong,Lian Yin,Zilong Wu,Keqing Zhou,William W. Yu
Given the good structural and compositional characteristics, there are considerable trends towards optimizing the architectures of two-dimensional materials to work for high-performance flame-retardant polymeric materials. Herein, considering the promising features of Ti 3 C 2 T x MXene, phytic acid-modified UiO-66 (PA-UIO) was self-assembled onto MXene nanosheets (MXene/PA-UIO) using electrostatic interactions. The resulting nanohybrids presented good interfacial interactions and dispersion in epoxy matrix, opening up the possibility of simultaneously improving the mechanical and flame-retardant properties of the composites. Consequently, epoxy composites with 2 wt% MXene/PA-UIO achieved elevated mechanical properties and enhanced thermal properties, reflected by the increased storage modulus and tensile strength, as well as the declined rate of mass loss (R max , 28.3% reduction rate). Also, the addition of MXene/PA-UIO nanohybrids led to the drops in peak heat release rate (PHRR), peak smoke production rate (PSPR), peak CO production rate (PCOP) and peak CO 2 production rate (PCO 2 P) of 32.0%, 36.5%, 33.8% and 38.6% respectively, compared to those of pure epoxy. Meanwhile, a smoke factor (SF) with 47% drop rate was obtained, accompanied by significantly decreased gas-phase products, verifying the superior heat-reducing, smoke-suppressing and toxic fume-attenuating effects of the nanohybrids. The synergistic effects between MXene and PA-UIO realized the “3-in-1” fire-safety epoxy nanocomposites in mechanical properties, flame retardancy and smoke/toxic fume-suppressing effects. The performance enhancement was mainly attributed to the dehydration charring of phosphorus-containing acid, catalytic charring of transition metal derivatives, quenching effects of phosphorus radicals and dilution of non-flammable gases, as well as the barrier effects of the nanosheets.
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Analytical Methods
·
2020
·Vol. 12
·期 41
·4967-4976
·
IF 2.596
Xin Yao,Jinhui Shen,Qingyan Liu,Huanbao Fa,Mei Yang,Changjun Hou
In this work, we designed and synthesized a nanocomposite comprising an amine-functionalized metal organic framework (UiO-66-NH2), a multiwalled carbon nanotube@reduced graphene oxide nanoribbon (MWCNT@rGONR) and a covalent organic framework (COF) synthesized using melamine and cyanuric acidmonomers via polycondensation (represented by MCA). The UiO-66-NH2/MCA/MWCNT@rGONR nanocomposite was used as a sensitive platform for an electrochemical aptasensor to detect kanamycin (kana). Owing to the rich chemical functionality, amino-rich structure and excellent electrochemical activity, the cDNA strands with terminal amino groups can not only anchor over the UiO-66-NH2/MCA/MWCNT@rGONR surface but also penetrate into the interior of porous UiO-66-NH2/MCA/MWCNT@rGONR networks. The characterization of the UiO-66-NH2/MCA/MWCNT@rGONR nanocomposite was performed by scanning electronic microscopy (SEM), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared (FT-IR) spectroscopy and X-ray diffraction (XRD). Furthermore, cyclic voltammetry (CV) and square wave voltammetry (SWV) were employed for the electrochemical performance study of this biosensor. The results indicated that the UiO-66-NH2/MCA/MWCNT@rGONR nanocomposite exhibited high bioaffinity toward the aptamer and the lowest limit of detection at 13 nM (S/N = 3) within a linearity of the kana concentration of 25–900 nM. In addition, it possessed great repeatability, stability and selectivity and obtained satisfactory recovery results in the real analysis of fish meat and milk, indicating the great potential for analytical measurements in food safety.
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SENSORS AND ACTUATORS B-CHEMICAL
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2025
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IF 7.7
Yanqing Ran,Rui Dai,Xiaoshuo Zhang,Faqiong Zhao,Baizhao Zeng
Epithelial cell adhesion molecule (EpCAM) is a transmembrane glycoprotein and its detection is important for diagnosis and therapeutic prognostic assessment of many cancers. Herein, a highly sensitive electrochemiluminescence (ECL) sensor was developed for its detection. In the ECL sensor, dimercaptosuccinic acid-capped core/shell structured CdTe/CdS quantum dot (QD) was loaded on metal-organic framework material UiO-66(Ce) as electrochemical luminophore; Ti 3 C 2 /Ag composite was introduced for immobilizing EpCAM aptamer. Due to the well immobilization of QD and catalysis of UiO-66(Ce), the obtained luminophore CdTe/CdS QDs@UiO-66(Ce) displayed a strong and stable ECL signal. Furthermore, the Ti 3 C 2 /Ag could act as a co-reactant accelerator to boost the ECL signal. Thus, the resulted sensor had quite strong initial ECL signal for signal-off detection. Further experiment showed that it exhibited good linear response to EpCAM over the concentration range of 1 pg mL −1 − 10 ng mL −1 in pH 7.4 Tris buffer, with a detection limit low to 0.66 pg mL −1 . Additionally, the ECL sensor also presented high selectivity and satisfying reproducibility; its practicability was demonstrated by the successful determination of EpCAM in serum samples.
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PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
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2024
·
IF 6.9
Dawei Lan,Huiwen Zhu,Jianwen Zhang,Fan Wang,Yueying Zheng,Zeyu Guo,Gang Yang,Mengxia Xu,Tao Wu
Metal-organic frameworks (MOFs) is a promising material that can be used in many fields, including environmental remediation. In this work, a novel adsorbent was successfully prepared by doping the Co element into the framework of UiO-66 with an in-situ oil bath synthesis. This modification ensured that the materials retained relatively good crystallinity. The Co-doping process had a major impact on the particle size and morphology of the original MOFs. The CoUiO-2 exhibited larger surface area and pore size than pristine UiO-66. Accordingly, the maximum adsorption amount of malachite green (MG) on CoUiO-2 (628.93 mg/g) was significantly larger compared with UiO-66 (343.64 mg/g), which was due to more active adsorption sites. In addition, the CoUiO-2 also showed a superior adsorption capacity on rhodamine B (RhB) (1106.22 mg/g). The adsorption process was well described by both the pseudo-second order and Langmuir models, indicating it was dominated by chemisorption and the adsorbent had a homogeneous surface area for adsorption. Therefore, the CoUiO-2 material could be a promising adsorbent for wastewater treatment . This work can provide an important insight into the modification of MOF materials and identify further opportunities to promote the adsorption performance in environmental remediation.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2024
·
IF 8.1
Jiahe Chen,Yingying Zhang,Xin Guo,Yiyang Qiao,Ping Yu
Artemisinin (Art) is the primary therapies for plasmodium falciparum malaria. However, it is very cumbersome to extract artemisinin from the plant Artemisia annua L. Herein, a novel defect-type UiO-66 structure was proposed, which can adsorb artemisinin through effective sites provided by ‘template molecules’. At the same time, the delayed phase inversion technology was used to prepare the loofah membrane to make the defect-type UiO-66 uniformly dispersed in the pores. In addition, the inside of the biomass loofah membrane had good mechanical properties and loofah membrane wrapped with polyacrylonitrile (PAN) can make Art solution evenly dispersed in each channel, greatly improving the utilization rate of defect-type UiO-66. The defect-type UiO-66 and the UiO-66-D@loofah membrane were characterized using various methods, including SEM, EDS, FT-IR, XRD, contact angle, and mechanical performance analyses. Compared with the static adsorption behavior of powder and loofah membrane, it was found that the adsorption performance presented an optimal adsorption capacity (56.548 mg g −1 ) at the flow rate of 5 mL min −1 , which was better than that of powder (27.096 mg g −1 ) as well as the static loofah membrane (33.127 mg g −1 ). The structural design of the membrane has provided a new solution for the extraction of Art from Artemisia annua L.
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JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2024
·
IF 4.1
Lingtao Liu,Lijian Wang,Jingxin Tan,Cong Yu,Junjie Bian,Xinbo Wang
Photocatalytic selective oxidation of furfural is a green, gentle way of preparing furoic acid. Photocatalytic oxidation effectively avoids the problems of difficult separation and high energy consumption in subsequent work-ups caused by the use of homogeneous oxidants. The photocatalytic process suffers from uncontrollable reactive oxygen species, resulting in low selectivity of the target product and excessive oxidation. Therefore, the K x -C 3 N 4 /UiO-66-NH 2 -Y catalyst was prepared by the mass proportion of UiO-66-NH 2 and K x -C 3 N 4 to form a heterogeneous structure, and the band gap width was adjusted to effectively avoid the formation of non-target strong reactive oxygen species ( OH). The results showed that: the aqueous 0.1 mM Na 2 CO 3 solution had an inhibitory effect on the non– target reactive oxygen species at room temperature; when the reaction time was 5 h and K 0.1 -C 3 N 4 /UiO-66-NH 2 -20, the furoic acid had the highest yield of 70.7, the target reactive oxygen species was confirmed by free radical capture experiments as O 2 – , and it was postulated that the reaction mechanism for the preparation of furoic acid by selective oxidation of furfural.
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JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2025
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IF 4.7
Mengyao Hua,Siyi Wang,Meng Cheng,Guangming Liang,Lei Xu,Yafen Zhou
Photocatalysts TiO 2 @UiO-66-(OH) 2 was successfully synthesized via an impregnation method for removal of formaldehyde under high pressure mercury lamp irradiation, and the photocatalysts were characterized by using a variety of analytical techniques. The characterized results indicated that TiO 2 was attached to the surface of UiO-66-(OH) 2 , and there was a strong electronic interaction between the elements of TiO 2 and UiO-66-(OH) 2 in the composite. The synergistic combination of high adsorption capacity of UiO-66-(OH) 2 , high dispersion of TiO 2 and efficient interfacial charge transfer between UiO-66-(OH) 2 and TiO 2 have a significant impact on the enhanced photocatalytic performance for formaldehyde removal. And the hydroxyl radicals (⋅OH) and superoxide radicals (⋅O 2 − ) also play a major role in removal of formaldehyde. The formaldehyde removal rate of 20TiO 2 @UO (1 g 0.15 m 3 ) is 83.01 % within 5.5 h, if the removal time is extended to 24 h, the formaldehyde removal rate can reach 91.49 %, and the continuous photocatalytic reaction showed that the composite is a highly stable catalyst. This could provide a useful method for highly efficient formaldehyde in indoor air purification.
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Small Structures
·
2025
·
IF 11.3
Jiaojiao Fan,Jianmin Chen,Wenji Li,Zhongxing Zhao,Zhenxia Zhao
Converting CO 2 into high-value-added products via “artificial photosynthesis” under mild conditions is a promising yet challenging strategy for developing efficient photocatalysts. This study reports a simple two-step solvothermal approach to fabricate the dual-metal–organic framework (MOF) nanocomposite NH 2 -UiO-66@PCN-224 (NU-66@PCN-224) with tightly integrated interfaces, which achieves efficient CO 2 to CO photocatalytic reduction under light irradiation. The epitaxially grown PCN-224, composed of Zr 6 clusters and tetrakis (4-carboxyphenyl) porphyrin (TCPP), serves as a shell layer and a visible light-absorbing antenna, thereby broadening the light absorption range of the composite material. Moreover, the tightly integrated interfaces of NU-66@PCN-224 enhance the mobility of photogenerated charge carriers, consequently enhancing its capability for CO 2 catalytic reduction. As a result, the combination of NU-66 and PCN-224 retains their individual advantages while achieving a synergistic enhancement of both adsorption and catalysis, further improving the photocatalytic performance. The as-prepared NU-66@PCN-224 catalyst exhibits outstanding photocatalytic performance, yielding 74.6 μmol g −1 h −1 of CO under irradiation without sacrificial agents or photosensitizers. This work demonstrates a straightforward and effective method for designing MOF-on-MOF photocatalysts with enhanced photoactivity.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Yu Guo,Jiawei Huang,Wenzhong Yang,Hui Xu
To address the persistent challenge of antibiotic contamination in aquatic systems, we developed a novel bimetallic hydrogel composite, i.e., Co/Zn-UiO-66-PAA/chitosan @biochar (Co/Zn-UPCB) through strategic integration of polyacrylic acid (PAA)-functionalized metal organic frameworks (UiO-66), lotus leaf-derived biochar, and natural chitosan. This hierarchically porous architecture synergistically combines chemical functionality (abundant carboxyl/amino groups), structural stability (3D crosslinked network), and bimetallic active sites (Co²⁺/Zn²⁺), exhibiting remarkable adsorption capacities of 1693.45 mg/g for tetracycline (TC) at pH of 7 and 1201.63 mg/g for ofloxacin (OFL) at pH of 5. Additionally, kinetic and isotherm studies reveal distinct removal pathways. TC adsorption follows chemisorption-dominated monolayer binding via coordination and hydrogen bonding, while OFL removal occurs through physisorption-driven electrostatic interactions. The Co/Zn-UPCB composite maintains near 80% efficiency after ten regeneration cycles and demonstrates strong anti-interference capability against common coexisting ions (except Ca²⁺). This work provides a sustainable design leveraging waste-derived biochar and biopolymer for efficient adsorption of TC/OFL, enabling precision water remediation.
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Water Conservation Science and Engineering
·
2025
·Vol. 10
·期 3
·1-16
·
IF 1.9
Li Zhengjie,Fang Chunxia,Ma Xilong,Liu Yixian,Xie Juan,Li Pengfei,Zhang Zhikun,Zhao Xudong,Sun Hua,Han Jilong
Herein, a facile and rapid preparation method was developed to synthesize Ce-doped UiO-66-NH 2 through a one-pot solvothermal method. This approach simultaneously introduces functional groups onto organic ligands and incorporating a novel metal into metal clusters. The incorporation of Ce ions effectively enlarged the pore size and increased the pore volume, thereby facilitating the diffusion of specific adsorbate molecules into the inner adsorption sites provided by the –NH 2 groups. Due to the favorable pore structures and more exposed adsorption sites, the safranine T (ST) adsorption capacity of Ce-doped UiO-66-NH 2 was ten times higher than the pristine UiO-66-NH 2 and reached 1340 mg/g at optimal adsorption conditions, surpassing most of the reported porous adsorbents. The kinetic and isotherm fitting results showed that the pseudo-second-order and Langmuir models described the adsorption behaviors of ST best, indicating a homogeneous, endothermic, and spontaneous monolayer adsorption process. The adsorption mechanism showed that the hydrogen bonding interaction and pore filling effect are identified as the main mechanism whilst electrostatic attraction interaction further enhances the adsorption capacity at optimal pH. Therefore, Ce-doped UiO-66-NH 2 can serve as a promising adsorbent for the removal of cationic dyes from textile wastewater, and the developed facile and rapid method offers a viable strategy to construct novel MOF-based adsorbents.
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ChemistrySelect
·
2025
·Vol. 10
·期 33
·e03026
·
IF 2
Yongzhao Zhang,Yunlei Zhou,Jiahang Wang,Heng Ban,Rongjie Xu,Junhao Pan,Fusheng Ge,Zhenya Zhu,Luping Lyu
Graphical MOFs-templated MgO/ZrO 2 enable highly selective glucose-to-fructose conversion. Structural confinement suppresses MgO agglomeration and tunes basicity, achieving 38.4% yield with 90.9% selectivity. High-selectivity glucose isomerization to fructose is essential for the biorefinery industry and fructose syrup production. In this work, a catalyst with tailored basicity was synthesized via the calcination of a MOFs (metal-organic frameworks)-based composite and employed as a chemo-catalyst for glucose isomerization, achieving high fructose selectivity. Characterization results confirmed that the synthesized catalyst was a composite consisting of and MgO, with MgO highly dispersed within the channels of . The MOFs templating effect restricted particle size and minimized agglomeration of MgO particles, enhancing the interaction between MgO and . This strong interaction effectively modulated the basicity of the catalyst, resulting in the predominance of weak basic sites. As a result, the catalyst demonstrated superior performance in glucose isomerization, achieving a 38.4% fructose yield with 90.9% selectivity at a 10 wt% glucose concentration, outperforming catalysts prepared by conventional methods. However, leaching remains a challenge. This work presents a novel approach for synthesizing highly dispersed mixed oxides and provides an effective catalyst for glucose isomerization.
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FOOD CHEMISTRY
·
2025
·
IF 9.8
Chenglin Zhang,Ya Wang,Qian Zhang,Baolian Liu,Xiupei Yang
The accurate determination of β-Lactoglobulin (β-LG), a major dairy allergen, is essential for susceptible individuals' health. Here, a multimodal β-LG sensor was developed by utilizing the aptamer (Apt) to regulate the metal-organic framework UiO-66-TCPP’ functions. The prepared UiO-66-TCPP had both fluorescence and peroxidase activity. After adsorbing β-LG Apt, the catalytic activity of UiO-66-TCPP was enhanced through increased substrate affinity and electron transfer, while the fluorescence of 6-carboxyfluorescein-labeled Apt was quenched via multiple interactions with the material, and the fluorescence of UiO-66-TCPP itself remained unchanged. After binding to β-LG, Apt desorbed from UiO-66-TCPP surface, thereby restoring Apt fluorescence and lowering UiO-66-TCPP’ catalytic activity. Thus, a colorimetric/ratiometric fluorescence platform for β-LG sensing in dairy products was constructed with low limits of detection (16.19, 47.69 ng/mL). On-site visual detection was further achieved by RGB analysis on a smartphone. This study proposes novel approaches to creating multi-modal platforms for accurate food allergen determination.
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