Journal of Environmental Chemical Engineering
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2022
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IF 7.968
Yiyang Liu,Hengyuan Zhang,Dechang Xie,Huiyu Lai,Qiufeng Qiu,Xiaoguo Ma
Macrolide antibiotics (MALs) are widely used in various fields and are resistant to degrade in the water environment, thus constituting potential hazards to human health. In this work, a new composite, molecularly imprinted polymers coated magnetic metal-organic frameworks with carboxyl modification ( [email protected] ) was selected and characterized, for the simultaneous specific adsorption and determination of five MALs from aqueous solution. It was found that UIO-66-COOH with ligand defects showed better pre-polymerization effect than other matrix materials . The synthesis conditions for the imprinting polymer were optimized via response surface methodology . The characteristics of related materials were studied, and a series of adsorption experiments were carried out. The results showed that the adsorption equilibriums of [email protected] were reached within 1 h, with the total adsorption capacity for the five MALs was 99.05 mg g −1 . The pseudo-second-order kinetic model and Freundlich isotherm model could best fit the adsorption process , and the adsorption thermodynamics was controlled by the change of entropy. Adsorption mechanisms were deduced as hydrogen bonding interaction and electrostatic interaction. In addition, [email protected] has good selectivity and reusability. Furthermore, a new detection method for the five MALs was developed, using the prepared material as the adsorbent for magnetic solid-phase extraction, coupled with high-performance liquid chromatography . Under the optimal extraction condition, the limits of detection for five MALs were 3.1–44.6 μg L −1 , and the recoveries were 92.9–108.7 % in the determination of real water samples. Therefore, the [email protected] could be the efficient adsorbent for simultaneous selective removal and sensitive determination of multi-residual MALs.
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ACS Applied Materials & Interfaces
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2022
·
IF 10.383
Qianlin Huang,Puzhen Zhao,Weiwei Wang,Lu Lv,Weiming Zhang,Bingcai Pan
Cost-efficient and durable manganese-based catalysts are in great demand for the catalytic elimination of volatile organic compounds (VOCs), which are dominated not only by the nanostructures but also by the oxygen vacancies and Mn–O bond in the catalysts. Herein, a series of nanostructured Co–Fe-doped-δ-MnO2 catalysts (Co–Fe-δ-MnO2) with high dispersion were in situ fabricated by employing metal–organic-frameworks (MOFs) as reducing agents, dopants, and templates all at the same time. The as-obtained Co–Fe-δ-MnO2-20% catalyst exhibited robust durability and high catalytic activity (225 °C) for toluene combustion even in the presence of 5 vol % water vapor, which is 50 °C lower than that of pristine δ-MnO2. Various characterizations revealed that the homogeneously dispersed codoping of Co and Fe ions into δ-MnO2 promotes the generation of oxygen vacancies and weakens the strength of the Mn–O bond, thus increasing the amount of adsorbed oxygen (Oads) and improving the mobility of lattice oxygen (Olatt). Meanwhile, due to successfully inheriting the framework structures of MOFs, the obtained catalyst exhibited a high surface area and three-dimensional mesoporous structure, which contributes to diffusion and increases the number of active sites. Moreover, in situ DRIFTS results confirmed that the toluene degradation mechanism on the Co–Fe-δ-MnO2-20% follows the MVK mechanism and revealed that more Oads and high-mobility Olatt induced by this novel method contribute to accumulating and mineralizing key intermediates (benzoate) and thus promote toluene oxidation. In conclusion, this work stimulates the opportunities to develop Co–Fe-δ-MnO2 as a class of nonprecious-metal-based catalysts for controlling VOC emissions.
研究领域:
环境科学
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材料科学
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MICROCHEMICAL JOURNAL
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2026
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IF 5.2
Fengjun Lv,Jinyi Chen,Shengxi Wu,Ran Sun,Lu Zhang,Yawen Luo,Hao Zhang,Doudou Xu
This study developed a stable, label-free AuNPs/Fe-MOFs/COOH-GO electrochemical immunosensor for the detection of Cytokeratin 19 fragment (CYFRA21-1), a critical biomarker for the early screening and diagnosis of non-small cell lung cancer (NSCLC). The nanocomposites of AuNPs/Fe-MOFs/COOH-GO was synthesized using a combination of hydrothermal synthesis, chemical reduction, and ultrasonic dispersion. AuNPs and COOH-GO components contributed high conductivity and a large specific surface area, which significantly enhanced the sensitivity of the sensor. The three-dimensional mesoporous structure of the Fe-MOFs further improved the stability of the immunosensor. Firstly, our novel nanocomposites was modified by using a glassy carbon electrode (GCE). CYFRA21-1 antibodies were then immobilized on the modified surface via interactions with thiol and carboxyl groups present on the nanomaterial. Bovine serum albumin (BSA) was employed to block non-specific binding sites. The constructed immunosensor exhibited a wide detection range for CYFRA21-1 from 1 pg mL −1 to 100,000 pg mL −1 , with a correlation coefficient (R 2 ) of 0.9989 in differential pulse voltammetry, and the limit of detection was defined as 0.35 pg mL −1 . The sensor also demonstrated high sensitivity, excellent specificity, good reproducibility, and remarkable stability, indicating its potent application potential for the early screening and diagnosis of NSCLC.
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INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
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2022
·Vol. 23
·期 11
·5900
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IF 6.208
Zhangzhen Cai,Qi Liu,Haoxin Li,Jingyi Wang,Guoyu Tai,Fan Wang,Jiangang Han,Yongli Zhu,Guangyu Wu
Recently, metal–organic frameworks (MOFs), which are porous inorganic–organic hybrid materials consisting of metal ions (clusters or secondary building units) and organic ligands through coordination bonds, have attracted wide attention because of their high surface area, huge ordered porosity, uniform structural cavities, and excellent thermal/chemical stability. In this work, durian shell biomass carbon fiber and Fe3O4functionalized metal–organic framework composite material (durian shell fiber-Fe3O4-MOF, DFM) was synthesized and employed for the adsorption removal of methylene blue (MB) from wastewater. The morphology, structure, and chemical elements of the DFM material were characterized by scanning electron microscope (SEM), X-ray diffraction (XRD), transmission electron microscope (TEM), and X-ray photoelectron spectroscope (XPS) techniques. Adsorption conditions such as pH, adsorption time, and temperature were optimized. The adsorption isotherm and kinetics results show that the adsorption process of DFM material to MB is more in line with the Freundlich model and pseudo-second-order kinetic model. Using these models, the maximum adsorption capacity of 53.31 mg/g was obtained by calculation. In addition, DFM material could be easily reused through an external magnet and the removal rate of MB was still 80% after five adsorption cycles. The obtained results show that DFM composite material, as an economical, environmentally friendly, recyclable new adsorbent, can simply and effectively remove MB from wastewater.Keywords:biomass fibers;durian shell;magnetic composite;adsorption
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RSC Advances
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2021
·Vol. 11
·期 12
·6699-6708
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IF 3.361
Mei Li,Xiaojuan Xia,Shuang Meng,YuChan Ma,Tong Yang,Yunhui Yang,Rong Hu
In this paper, a novel sandwich immunosensor based on a toluidine blue (Tb) loaded metal organic framework (Cu(II)-HKUST-1/Tb) as the signal element and a nitrogen-doped 3D carbon nanostructure as the electrode substrate was constructed for the detection of C-reactive protein (CRP). Tb as an electrochemically active agent usually forms a polymer by aggregation in the solvent, causing a poor electrochemical response. Therefore, in order to overcome this obstacle, Cu(II)-HKUST-1 with a porous nanostructure and large specific surface area as a carrier could adsorb a large number of Tb molecules on its surface to improve its electrochemical performance. In addition, the high electron transfer efficiency of the N-doped bamboo-like carbon nanotubes (CoFe/N-GCT) improves the sensitivity of the biosensor. Differential pulse voltammetry (DPV) was used to detect the current signal of Tb at −0.2 V. The current response increased with the increase in concentration of CRP, ranging from 0.5 to 200 ng mL−1. The detection limit is 166.7 pg mL−1 (S/N = 3). Moreover, the proposed biosensor can be applied in real serum sample detection. It has potential applications in the field of biomedicine assays.
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MICROPOROUS AND MESOPOROUS MATERIALS
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2020
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IF 4.551
Yunlei Zhang,Wen Guan,Hongyao Song,Yanan Wei,Pei Jin,Bing Li,Changhao Yan,Jianming Pan,Yongsheng Yan
Chemically functional microporous metal-organic frameworks (MOFs) crystals are attractive for catalysis applications, and recent results show that they can be immobilized on high stability substrates, such as carbon materials. In this work, g-C 3 N 4 supported UiO-66-type MOFs catalysts with only acid, base or acid-base bi-functional active sites, have been successfully synthesized via a green (aqueous solutions), mild (90 °C, atmospheric pressure), and one-pot modulated hydrothermal (MHT) method. The physical and chemical properties of the obtained catalysts were systematically characterized by different characterization methods. The results indicated that the synthesized catalysts have microporous structure, excellent thermostability and acid-base bi-functional active sites. One-pot synthesis of 5-hydroxymethylfurfural (5-HMF) from glucose was performed to investigate the activities of synthesized catalysts. Benefiting from the synergistic effects of the acid-base bi-functional active sites, the highest 5-HMF yield of 54.9% was achieved in an isopropanol-mediated DMSO system, under the optimal conditions. Moderate to excellent yields of 5-HMF were also obtained from one-pot conversions of other carbohydrates, including inulin , sucrose, cellobiose, maltose and starch , with our developed catalytic system. The one-pot production of 5-HMF from cellulose was also smoothly processed by the g-C 3 N 4 supported UiO-66-type MOFs catalysts in an IL-based system. This work offers a versatile strategy for developing supported UiO-66-type MOFs catalyst for a wide range of biomass transformation to platform chemicals.
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CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Nuanfei Zhu,Kuijing Yuan,Dinghui Xiong,Fengxiang Ai,Kun Zeng,Biying Zhao,Zhen Zhang,Hongjun Zhao
Dietary intake is an important exposure pathway of environmental bisphenols including bisphenol S (BPS, a typical emerging organic pollutant). However, available data on the occurrence and risk assessment of BPS in food samples are limited due to the lack of high-throughput analytical methods. Herein, based on H 2 O 2 inducing fluorescence turn-off signals, a sensitive and high-throughput fluorescence enzyme-linked immunosorbent assay (FELISA) was developed for BPS investigation in beverages. In this system, the fluorescence of copper nanoclusters in ZIF-8 (CuNCs-CS@ZIF-8) could be quenched with the presence of H 2 O 2 owing to the strong oxidation, being served as signal amplification in FELISA. Meanwhile, the aggregation-induced emission (AIE) fluorescence enhancement of CuNCs-CS through the conformational locking of ZIF-8 provided an effective strategy to overcome the intrinsic limitations of FELISA including high background, serious fluorescence quenching in the detection of real samples. Thus, the integration of AIE building blocks into porous ZIF-8 showed obvious advantages in enhancing the analytical performance of FELISA. Under optimized conditions, satisfactory results with good accuracy were achieved in this proposed FELISA, which was applied for the systematic investigation of BPS in foods and further health risk assessments. The results after 100 beverages analysis displayed an average detection frequency of 55%, and the detected concentration of BPS ranged from below the limit of quantification (LOQ) to 12.08 ng/mL with a mean value of 1.717 ng/mL. Besides, the estimated daily intake (EDI) of BPS was calculated to be 0.05449–4.483 ng/kg-bw/day, in which milk–tea drinks contributed to the majority of BPS daily intake (mean EDI = 4.483 ng/kg-bw/day). And the hazard quotient (HQ) according to EDI values indicated that BPS exposure in beverages might not make a considerable impact on human health.
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BIOSENSORS & BIOELECTRONICS
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2017
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IF 7.78
Zhiyong Tang,Junlin He,Jun Chen,Yazhen Niu,Yilin Zhao,Yuchan Zhang,Chao Yu
We are presenting an electrochemical immunosensor for the determination of Galectin-3 (Gal-3), a biomarker of heart failure. A glassy carbon electrode (GCE) was modified with a film of a composite made from the N-doped graphene nanoribbons immobilized Fe-based-Metal-organic frameworks deposited with Au nanoparticles (N-GNRs-Fe-MOFs@AuNPs). Primary antibody against Gal-3 (Gal-3-Ab 1 ) was immobilized on the Au nanoparticles on the surface of the modified GCE which then was blocked with bovine serum albumin . Signal amplification is crucial for obtaining low detection limits in biosensors. Here, a relatively simple and ultrasensitive sandwich-type electrochemical immunosensor based on novel signal generation and amplification was developed for the determination of Gal-3. A kind of novel redox-active species, AuPt-Methylene blue (MB) (AuPt-MB) nanocomposites , was synthesized by a one-pot method for the first time. Wherein, MB as a kind of the electron transfer mediators in an amperometric biosensor is responsible for electron production and signal amplification. The rod-like AuPt-MB nanohybrids displayed uniform morphology and good electrochemical activity and can combine with the second antibodies against Gal-3 (Gal-3-Ab 2 ). And the AuPt-MB-Ab 2 coupled with the N-GNRs-Fe-MOFs@AuNPs-Ab 1 to form the sandwich type format that can greatly enhance the biosensor's sensitivity. Under optimal conditions, the designed immunosensor exhibited a linear concentration range from 100 fg mL −1 to 50 ng mL −1 , with a low detection limit of 33.33 fg mL −1 (S/N = 3) for Gal-3 in spiked serum. Additionally, the designed immunosensor showed acceptable selectivity, reproducibility and stability. The satisfactory results in analyzing human serum samples indicated potential application promising in monitoring biomarkers.
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ACS Applied Materials & Interfaces
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2017
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IF 7.504
Shengwen Liu,Xian Zhang,Guozhong Wang,Yunxia Zhang,Haimin Zhang
Developing bifunctional oxygen electrocatalysts with superior catalytic activities of oxygen reduction reaction (ORR) and oxygen revolution reaction (OER) is crucial to their practical energy storage and conversion applications. In this work, we report the fabrication of Co/CoxSy@S,N-codoped porous carbon structures with various morphologies, specific surface areas, and pore structures, derived from controllably grown Co-based metal–organic frameworks with S- and N-containing organic ligands (thiophene-2,5-dicarboxylate, Tdc; and 4,4′-bipyridine, bpy) utilizing solvent effect (e.g., water and methanol) under room temperature and hydrothermal conditions. The results demonstrate that Co/CoxSy@S,N-codoped carbon fibers fabricated at a pyrolytic temperature of 800 °C (Co/CoxSy@SNCF-800) from Co-MOFs fibers fabricated in methanol under hydrothermal conditions as electrocatalysts exhibit superior bifunctional ORR and OER activities in alkaline media, endowing them as air cathodic catalysts in rechargeable zinc–air batteries with high power density and good durability.
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CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Yisi Liu,Zhicheng Chen,Nian Zhao,Guangcong Tong,Zongxu Li,Biqiong Wang,Yue Du,Qiyun Pan,Zhong Li,Yunlong Xie,Yahui Yang
Rational design and accessible fabrication of bifunctional electrocatalysts with high electrocatalytic activity, low price and good durability for the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) are urgently required for metal-air batteries, but it remains as a difficult and hot subject. Herein, we report a novel cobalt-ion-exchange and pyrolysis strategy with the well-designed bio-MOF-1 as the self-template to prepare ultra-small cobalt nanoparticles embedded into N-doped hierarchical porous carbon (Co@N-HPC-800) with excellent electrical conductivity, high surface area and abundant Co-N 4 active sites. The electrochemical test results verify the outstanding bifunctional electrocatalytic activity and stability of Co@N-HPC-800 in alkaline condition, even outperforming the commercial Pt/C + RuO 2 electrocatalysts. The in situ Raman technique demonstrates the ORR and OER catalytic process occur through the redox of Co(II) and Co(III) species. The rechargeable Zn-air battery (ZAB) assembled with Co@N-HPC-800 cathode deliveries an open circuit voltage of 1.42 V, a specific capacity of 129 mAh cm −2 , a peak power density of 89.1 mW cm −2 , and stable cyclability over 85 h at 5 mA cm −2 by refreshing the electrolyte. The Co@N-HPC-800 cathode in a flexible quasi-solid-state ZAB exhibits good flexibility and stability under different bending states. This work paves a simple and valuable way for designing non-noble high-efficient bifunctional electrocatalysts in Zn-air batteries and related energy storage and conversion technologies.
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FOOD CHEMISTRY
·
2025
·
IF 9.8
Kunxiang Deng,Yasen Wang,Yilin Wang,Zhifang Liu,Xinyi Li,Yixi Xie,Haoran Guo,Pengcheng Zhao,Junjie Fei
Chlorpyrifos (CPF) is widely utilized in agricultural practices, and its residue in food raise significant concerns food safety. However, current detection methods often suffer from complex operation procedures and unstable signal responses. Therefore, there is an urgent need to develop a reliable sensor for detecting CPF residue in food samples. In this work, a Z-scheme heterojunction was formed using hollow In 2 O 3 (H-In 2 O 3 ) and Bi 2 WO 6 nanosheets. The staggered band structure of the H-In 2 O 3 /Bi 2 WO 6 heterojunction facilitates carrier separation and transfer, thereby enhancing the sensor's response. In the presence of CPF, it reacts with · OH radicals generated by the heterojunction, further amplifying the signal. The sensor exhibits a linear response in the range of 5–700 nM with a limit of detection (LOD) of 0.72 nM. In addition, this photoelectrochemical sensor demonstrates satisfactory stability, anti-interference, selectivity and reproducibility, showing great potential for CPF analysis in real samples.
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MICROCHEMICAL JOURNAL
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2024
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IF 4.9
Wenfang Huang,Shulong Wang,Min Wu,Xinping Huang,Qifei Mo,Jiayao Xu,Rong Wang,Qingmin Wei
Hydrogen peroxide (H 2 O 2 ) plays a crucial role as a signaling molecule within cells. The concentration of H 2 O 2 differs in inflammation, cancer, cardiovascular and cerebrovascular diseases and neurodegenerative diseases compared to normal tissue. Therefore, the accurate determination of H 2 O 2 is important for the diagnosis and understanding of pathogenesis of disease. However, to accurately determine H 2 O 2 levels in vivo, highly sensitive biosensors and deep tissue penetrating imaging techniques are required. To address this challenge, we developed a biocatalytic porous structure composed of metal–organic frameworks (MOFs) that encapsulates horseradish peroxidase (HRP) and 3, 3′, 5, 5′-Tetramethylbenzidine (TMB) in situ, enabling biomineralization while maintaining the catalytic activity and stability of natural enzymes. This leads to the formation of a hypersensitive biological probe BSA@HRP@TMB@ZIF-8 (BHTZ). BHTZ is an activatable near-infrared probe and its absorption signal in the second near-infrared window (1030 nm) is activated in the presence of H 2 O 2 . The findings indicate that the BHTZ probe has high sensitivity, low toxicity and high stability, and can be utilized to detect H 2 O 2 levels in mice with drug-induced liver injury, such as that caused by lipopolysaccharide (LPS) in vivo. These results not only provide a highly sensitive and deep imaging method for monitoring physiological changes in H 2 O 2 levels in vivo, but also broaden the potential applications of MOFs in biomedical research and diagnostics.
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