MICROCHIMICA ACTA
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2026
·Vol. 193
·期 10
·693
·
IF 5.4
Li Sirui,Wang Shanshan,Chang Guorui,Yang Yaoxing,Feng Hui,Xue Haoqian,Zhang Li,Luo Manlin,Liu Jing,Li Bowen,Xu Shuxia
To enable rapid and reliable on-site monitoring of organophosphorus pesticides a novel portable dual-mode biosensor has been developed which integrates electrochemical and colorimetric detection into a single freeze-dried bioactive capsule. This innovative design supports instrument-free operation and provides dual-signal cross-validation. The sensor is based on a newly synthesized Mn/Ce bimetallic metal-organic framework (MOF) nanozyme with high oxidase-like activity, co-immobilized with acid phosphatase (ACP) within a mannitol- and sucrose-stabilized lyophilized capsule to ensure long-term stability and field readiness. In the presence of malathion, the pesticide selectively inhibits ACP, thereby restoring the MOF's catalytic activity and enabling the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB). The resulting signal is detected both visually and through chronoamperometry after conversion to a yellow diimine product. This approach achieves a wide linear detection range of 1–2000 nM and an exceptionally low detection limit of 0.06 nM for malathion, along with high accuracy evidenced by recoveries of 93.31%-104.03% in real water samples. This work establishes a field-deployable and user-friendly sensing platform that combines innovative material design with integrated dual-mode detection, offering a robust and practical strategy for on-site environmental monitoring. Graphical
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Wuyang Li,Chan Xie,Peng Zhang,Zhonghao Zhang,Mingshan Xue,Zuozhu Yin,Yidan Luo,Zhen Hong
Traditional mono-functional anti-corrosion coatings are unable to meet the long-term corrosion resistance requirements of metal materials, therefore developing multifunctional anti-corrosion coatings have broad application prospects. In this work, long-lasting anti-corrosion coatings with superhydrophobic and self-healing properties were successfully prepared by in-situ growth of dual-ligand cerium-based metal–organic framework (Ce-MOF) on the surface of graphene oxide (GO), followed by chemical modification with polydopamine (PDA), resulting in 5B level of adhesion and excellent mechanical robustness. The superhydrophobic surface, as the external armor of the coating, can effectively block the penetrating path of corrosive media. Meanwhile, the MOF structure formed by the coordination of 2-mercaptobenzimidazole (2-M) with cerium ions endows the coating with smart self-healing properties and long-lasting corrosion resistance. Electrochemical tests showed that the low-frequency impedance modulus value of the superhydrophobic coating still reached 3.82 × 10 8 Ω cm 2 after 30 days salt immersion. Due to the formation of protective films and insoluble precipitates at the defect site by 2-M and cerium ions, the scratches on the coating were significantly reduced after 40 days salt spray experiment, demonstrating the self-healing ability of the coating. This multifunctional anti-corrosion coating provides a new approach for preparing coatings with long-term effective corrosion resistance.
研究领域:
材料科学
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腐蚀与防护
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表面工程
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2024
·
IF 0
Wang Fei,Jin Yulong,Xue Yun,Yu Shuihang,Liu Na,Ma Qingxiang,Xu Jie,Xue Bing,Wei Xuejiao
It is desirable but challenging to develop highly-efficient catalysts for the direct synthesis of dimethyl carbonate (DMC) from methanol and CO 2 . The vacancy-mediated incorporation of heteroatom into surface reconstruction is an efficient method of defect engineering for enhancing the catalytic properties. In this work, manganese-doped cerium oxide porous nanoribbons (Mn/CeO 2 -BTC) were prepared derived from a Ce-BTC by a sacrificial template approach. It is found that the catalytic activity of Mn/CeO 2 -BTC catalysts can be readily controlled by varying the amount of Mn dopants and the as-synthesized 0.1-Mn/CeO 2 -BTC exhibited an outstanding activity for the synthesis of DMC from CO 2 and methanol, which reached a high DMC yield (6.53 mmol DMC /g cat. ) without any dehydrating agents. Based on characterization results, the enhanced performance may be attributed to the defective structures caused by Mn doping and the porous nanoribbons of the CeO 2 crystals, which provide more surface oxygen vacancies and acidic-basic sites, favoring adsorption and activation of CO 2 and methanol.
研究领域:
材料科学
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催化化学
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MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Yingyun Luo,Zhuoya Meng,Jingwei Jiang,Yiyi Zhou,Yujia Chen,Ming Dong,Meiyi Xie,Peihan Xie,Mei Wang
A new electrochemical sensor based on a nanocomposites (Ce-MOF/Ti 3 C 2 ) synthesized by cerium-based metal-organic framework (Ce-MOF) and titanium carbide (Ti 3 C 2 ) was constructed. Ce-MOF/Ti 3 C 2 modified a glassy carbon electrode (GCE) to enable the individual or simultaneous trace detection of Cd 2+ and Pb 2+ by square wave anodic stripping voltammetry (SWASV). The morphology and composition of the composite were characterized using SEM, XPS and XRD, while its electrochemical performance was evaluated by electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV). The developed sensor exhibited excellent performance, enabling simultaneous detection of Pb 2+ (8-500 μg/L) and Cd 2+ (10-500 μg/L), with detection limits of 1.02 μg/L and 2.5 μg/L, respectively, and also demonstrated good anti-interference capability, reproducibility and stability. This new method was successfully applied for the detection of Cd 2+ and Pb 2+ in river water and human urine samples, highlighting its potential for environmental and biological monitoring applications.
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Surfaces and Interfaces
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2025
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IF 6.3
Chunlin Chen,Xiyi Ma,Guoqing Xiao,Mingtan Wang,Junjie Cao,Jing Gou,Hongxin Yan
Waterborne epoxy coatings are favored for their environmental friendliness and low volatile organic compounds (VOC) emissions. However, traditional waterborne epoxy coatings have limitations in terms of barrier properties and self-healing ability, resulting in poor long-term corrosion protection. To overcome this shortcoming, a novel green composite based on PDA@Ce-MOF@TA-Fe (PCTF) was developed in this study, aiming to construct a high-performance coating system with enhanced corrosion protection, pH responsiveness, and self-healing properties. The EIS measurements demonstrated a significant enhancement in the barrier property and self-healing capability of the waterborne epoxy coating incorporated with the PCTF composite (PCTF/WEC). After 40 days of immersion in corrosive conditions, the impedance of the PCTF/WEC coating remains at 9.82 × 10 8 Ω·cm 2 , which is much higher than that of the WEC coating alone (1.47 × 10 6 Ω·cm 2 ). PCTF/WEC coating also shows excellent pH response in acidic environments (pH = 3). Salt spray tests and UV irradiation tests confirm the coating's good weathering resistance. This study provides a promising strategy for the development of long-lasting and environmentally friendly anti-corrosion coatings.
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ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Jiejun Ren,Andries Meijerink,Xiaopeng Zhou,Jiapeng Wu,Gangyi Zhang,Yuhua Wang
All-inorganic perovskite quantum dots (PQDs), which possess outstanding photophysical properties, are regarded as promising materials for optoelectronic applications. However, the poor light conversion efficiency and severe stability problem hinder their widespread applications. In this work, a novel encapsulation strategy is developed through the in situ growth of CsPbX3 PQDs in presynthesized mesoporous cerium-based metal organic frameworks (Ce-MOFs) and further silane hydrolysis–encapsulation, generating stable CsPbX3@Ce-MOF@SiO2 composites with greatly enhanced light conversion efficiency. Moreover, the simulation results suggest that the pore boundary of Ce-MOFs has a strong waveguide effect on the incident PQD light, constraining PQD light inside the bodies of Ce-MOFs and suppressing reabsorption losses, thus increasing the overall light conversion efficiency of PQDs. Meanwhile, the Ce-MOF@SiO2 protective shell effectively improves the stability by blocking internally embedded PQDs from the harmful external environment. Further, the obtained white-light-emitting diode shows an ultrahigh luminous efficiency of 87.8 lm/W, which demonstrates their great potential in optoelectronic applications.
研究领域:
材料科学
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光学工程
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电子工程
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FOOD CHEMISTRY
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2026
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IF 10.4
Yaxin Li,Shuqi Wang,Guanghui Chen,Shiwen Wu,Shuzhen Zheng,Hongzhi Lu,Shoufang Xu
Zn/Ce-MOF integrates fluorescence, oxidase-like and apparent hydrolase-like behavior. • Ratiometric sensing enables signal self-calibration. • Smartphone RGB signals reveal distinct response patterns for five OP standards. The widespread residue of highly toxic organophosphorus pesticides (OPs) poses a serious threat to food safety and human health, underscoring the need for sensitive screening methods. In this work, a ratiometric fluorescence sensor array was constructed based on a trifunctional Zn/Ce-MOF exhibiting intrinsic blue fluorescence, oxidase-like activity, and apparent phosphoester hydrolase-like behavior. LC–HRMS full-scan analysis further showed DDV signal depletion accompanied by a marked increase in a DMP-assigned signal after 90 min. Ce sites promoted o -phenylenediamine (OPD) oxidation to produce yellow-fluorescent 2,3-diaminophenazine (DAP), which attenuated the intrinsic fluorescence through the inner filter effect. Upon addition of OPs, the DAP-associated emission decreased while the intrinsic fluorescence of Zn/Ce-MOF recovered, resulting in a ratiometric response (F 565 /F 440 ). Meanwhile, the fluorescence variation enabled visible color changes and smartphone-assisted signal acquisition based on red, green, and blue (RGB) analysis. The proposed sensor exhibited two linear response regions toward DDV over the final concentration ranges of 0–5 and 5–30 μg/mL, with a detection limit of 0.043 μg/mL. The sensing platform was preliminarily evaluated through post-extraction matrix-spike experiments for DDV in tenfold-diluted tomato and spinach extracts, yielding post-extraction matrix-spike recoveries of 93.5–121.5%. Multivariate analysis of F 565 /F 440 , G/B, and R/G signals revealed characteristic distribution, separation, and clustering patterns for five OP standards, including dichlorvos (DDV), dimethoate (DM), chlorpyrifos (CPF), methyl parathion (MP), and trichlorfon (TCF), in standard solutions. The study therefore provides a Zn/Ce-MOF-based strategy for smartphone-assisted DDV screening in tenfold-diluted tomato and spinach extracts and multichannel response-pattern analysis of five OP standards under controlled conditions. Further studies will evaluate the applicability of the multichannel response patterns to multiple OPs in complex food matrices. Illustration of the working principle and application of the Zn/Ce-MOF ratiometric fluorescent probe for OPs detection: (A) Synthesis of Zn/Ce-MOF. (B) Proposed mechanism of Zn/Ce-MOF-mediated OP transformation and fluorescence regulation. (C) Integrated smartphone RGB acquisition and multivariate response-pattern analysis of OP standards. Download: Download high-res image (228KB) Download: Download full-size image
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Chemistry-An Asian Journal
·
2023
·Vol. 18
·期 11
·e202300202
·
IF 4.1
Zhenyu Zhou,Dexuan Li,Weiming Huang,Rongyue Wang,Jiapeng Zhong,Yangyang Zhang,Jiazhou Meng,Chuanhao Li
Graphical The pH value not only influences the surface charges of an adsorbent, but also affects the form of phosphate, which might decrease the adsorption efficiency of an adsorbent. Herein, an effective adsorbent was developed to realize phosphate adsorption by different adsorption mechanisms (electrostatic attraction or ligand exchange) in a wide pH range. Eutrophication has posed a threat to aquatic ecosystems, so it's urgent to remove excessive phosphate from water. In this study, we developed an adsorbent material, cerium/terephthalic-acid metal-organic-frameworks (Ce-MOF), to remove phosphate from different water systems. The optimal Ce-MOF presented a maximum phosphate adsorption capacity of 377.2 mg/g, approximately 3.7 times higher than that of the commercial phosphate adsorbent (Phoslock: 101.6 mg/g). Experimental and computational analysis suggested that pH dominated the adsorption process. The main forces driving the adsorption process changed from the synergistic effect of electrostatic attraction and ligand exchange at lower pH to only ligand exchange at the increased pH values. Hence, the Ce-MOF is applicable for phosphate adsorption in a wide pH range. Impressively, the adsorbent remained an excellent phosphate adsorption performance in the real water containing various interfering ions and organic matters, indicating the potential of Ce-MOF for the practical use to solve the water eutrophication issue.
研究领域:
环境科学
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材料科学
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Materials Today Communications
·
2025
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IF 4.5
Yin-Xia Sun,Li-Ping Liu,Ai-Ping Luo,Qin-Shu Li,Yu Sun,Zhe-Peng Deng,Wan-Hong Sun,Geng Guo
A new anionic Ce-MOF ([CeL(CHOO - )]·(CH 3 ) 4 N + )) based on ligand H 3 L (2,4,6-tris(4-carboxyphenyl)-1,3,5-triazine) was successfully synthesised and its adsorption properties of organic dyes were deeply investigated. Due to its unique pore structure and anionic skeleton, Ce-MOF exhibits excellent adsorption capacity for cationic dyes such as methylene blue (MB), crystal violet (CV) and rhodamine B (RhB), while it has no adsorption effect on anionic dyes such as methyl orange (MO) and methyl red (MR). The adsorption kinetics and isothermal model of Ce-MOF were systematically investigated using methylene blue as a model, and it was found that the adsorption process conformed to the quasi-primary kinetic model and the Langmuir isothermal model, indicating monomolecular layer adsorption. After five cyclic adsorption experiments, Ce-MOF maintained efficient adsorption performance, showing excellent cyclic stability and structural integrity. In the selective adsorption experiment of mixed dyes, it was found that cationic dyes can be adsorbed by Ce-MOF, and small molecule cationic dyes have a faster adsorption rate than large molecules. In addition, through DFT theoretical calculations, we revealed the adsorption mechanism of Ce-MOF on cationic dyes, which provided a theoretical basis for the design of new and efficient adsorption materials. This study not only provides an effective strategy for the removal of organic dyes, but also opens up a new way for the application of MOF materials in environmental treatment.
研究领域:
环境科学
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材料化学
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污染治理
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吸附技术
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理论计算化学
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JOURNAL OF POLYMER SCIENCE
·
2023
·Vol. 61
·期 20
·2426-2439
·
IF 3.4
Siyu Jiang,Sheng Li,Xuhui Yang,Lubin Liu,Xiaoli Li,Miaojun Xu
Cerium-containing metal organic framework defined as Ce-MOF was prepared and then combined with piperazine pyrophosphate (PAPP) for preparing flame retardant ethylene vinyl acetate (EVA) copolymer composites. The samples of EVA/PAPP/Ce-MOF achieved UL-94 V-0 rating with the limiting oxygen index (LOI) value of 31.3% when 17 wt% PAPP/Ce-MOF with the mass fraction of 97:3 was introduced. Under the same loading amount of PAPP, the EVA/PAPP only obtained UL-94 V-1 rating with the LOI value of 26.9%. Cone calorimeter test confirmed that the total heat release and total smoke production of EVA/PAPP/Ce-MOF significantly reduced from 132.8 MJ m −2 and 11.5 m 2 for EVA/PAPP to 98.8 MJ m −2 and 7.3 m 2 , with a reduction of 25.6% and 36.5%, respectively. Besides, the maximum smoke density decreased from 488.8 and 375.9 for EVA and EVA/PAPP to 177.5 for EVA/PAPP/Ce-MOF. It indicated that the addition of Ce-MOF and PAPP effectively exerted synergistic flame retardant and smoke inhibition effect for EVA. Moreover, the addition of Ce-MOF enhanced the compatibility of PAPP with EVA matrix, and water resistance of EVA/PAPP/Ce-MOF was higher than that of EVA/PAPP. The x-ray photoelectron spectroscopy texts of residual char of EVA composites indicated that the cerium ion complexed with phosphoric acid and polyphosphate generated by the thermal decomposition of PAPP and then more phosphorus elements remained in condensed phase. As a result, the sufficient, crosslinking and dense char layer with excellent intensity was formed, and the heat, combustible gas and smoke were efficiently inhibited. Consequently, the EVA materials were endowed excellent fire safety as well as low heat and smoke release. Graphical
研究领域:
材料科学
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火灾安全工程
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LANGMUIR
·
2025
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IF 3.9
Shangpu Zhuang,Yilin Lei,Fan Xue,Tao Wei,Di Hao,Luming Qi,Lichun Nian,Yuyu Sun,Mifen Cui,Zhuxiu Zhang,Ruiping Wei,Jihai Tang,Xu Qiao
In heterogeneous catalysis research, a significant challenge is to elucidate how metallic copper (Cu0) and cuprous (Cu+) phases interact with their supporting materials, with a special emphasis on how oxygen vacancy (OV) sites participate in hydrogenation processes. In this work, Cu/CexZr10-x catalysts were prepared by introducing Zr-incorporated Ce-MOF, followed by copper impregnation and calcination. Characterization by TEM, XPS, EPR, H2-TPD, Py-IR spectroscopy, and in situ FTIR revealed that Zr doping enhanced the OV concentration, stabilized Cu+ species, and generated abundant Lewis acid sites. The optimal Zr content effectively balances the Cu0/Cu+ redox couples and acid sites, accelerating desired reactions, while excessive Zr incorporation leads to increased Brønsted acidity and promotes undesirable side reactions. These features synergistically enhance the adsorption of 5-HMF, activate carbonyl groups, and facilitate the sequential hydrogenation and deoxygenation processes, thereby achieving 5-HMF fully converted and achieving a 2,5-DMF selectivity of 98.2% under optimal reaction parameters. This study clarifies the cooperative mechanism among Cu active sites, OV, and acid sites in the conversion of 5-HMF and demonstrates that rational Zr incorporation in MOF-derived Cu/CexZr10-x catalysts can precisely modulate surface properties and significantly improve catalytic performance. These findings offer valuable guidance for the rational design of advanced heterogeneous catalysts aimed at biomass valorization and the production of renewable fuel.
研究领域:
多相催化
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材料化学
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生物质转化
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可再生能源
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可持续化学
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