Journal of Materials Chemistry A
·
2024
·Vol. 12
·期 11
·6623-6633
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IF 10.7
Guangxu Bao,Yaxin Jin,Qun Fan,Xiaoyi Chen,Xiao Wang,Tianxiang Yan,Haoyuan Chi,Jianlong Lin,Wenquan Cui,Sheng Zhang
Developing stable and porous oxygen reduction catalysts is crucial for advancing clean energy technologies. Zeolite imidazole frameworks (ZIFs) present versatile avenues for synthesizing non-noble metal ORR catalysts due to their unique morphology. While previous research has predominantly focused on augmenting catalytic properties through increased metal loading on ZIFs, herein we explore the engineering of ZIF-derived catalyst morphologies to enhance active site utilization and facilitate mass transport, presenting a promising avenue for performance improvement. We present a facile synthesis method for hollow carbon nano-frameworks (HCNFs) loaded with FeCu alloy nanoparticles, leveraging tannic acid assistance. The resulting FeCu-HCNFs exhibit a hierarchical pore structure, numerous defect sites, and enriched active sites on the shell, showcasing exceptional ORR activity. Specifically, the FeCu-HCNFs demonstrate a 25 mV higher half-wave potential compared to widely used noble Pt/C in alkaline systems and outstanding zinc–air battery performance. Density functional theory (DFT) results underscore the catalytic enhancement, revealing that introducing Cu increases the charge density at the central sites of Fe and reduces the adsorption energy for O2* and OH*. This morphological engineering strategy establishes FeCu-HCNFs as an effective Pt-free catalyst for the ORR, emphasizing its practical potential in advancing fuel cell technologies.
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TALANTA
·
2025
·
IF 6.1
Pengyue Song,Doudou Lei,Lingling Li,Nan Long,Qingbin Xu,Ying Li,Lidong Zhou,Ruile Pan,Weijun Kong
Regarding the high incidence of residue and serious toxicity of acetochlor (ATC) pesticide, it is urgent to explore simple and low-cost methods for their sensitive detection in food. In this study, with zeolite-like imidazole frameworks (ZIFs) as the carriers for embedding glutathione-modified luminescent gold nanoclusters (GSH-AuNCs) exhibiting aggregation-induced emission (AIE) effect, a GSH-AuNCs@ZIF-8 probe driven strip-based lateral flow immunosensor (LFIS) was developed for visual qualitative and fluorescent quantitative dual-modal detection of ATC. The encapsulation of GSH-AuNCs into ZIF-8 with restriction effect not only significantly improved the stability and anti-interference ability of AuNCs, but also remarkably enhanced the fluorescence efficiency for signal amplification due to the enhanced AIE effect of GSH-AuNCs, endowing the LFIS platform with unique performance. Under optimal conditions, the LFIS platform could realize the point-of-care visualization and quantitation of ATC within 20 min with a detection limit of 8.3 pg/mL and a broad linear range of 0.01–10.0 ng/mL. High recoveries of 96.44%–106.8 % in the spiked ginger samples confirmed the outstanding accuracy and dependability of the new platform for ATC analysis of real samples. Compared with other immunoassays, the AuNCs@ZIF-8-based dual-modal LFIS exhibited the advantages of simple preparation, simple operation, short analytical time, and low cost, which could be expanded to monitor more pesticides and more trace contaminants in diverse food and agricultural products, and medicinal material matrices.
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DALTON TRANSACTIONS
·
2025
·
IF 3.3
Zhaojie Wang,Xinle Sun,Qinglong Liu,Caifeng Xia,Qikang Yin,Siyuan Liu,Xiaoqing Lu,Hongyu Chen
Mixed matrix membranes (MMMs), which incorporate metal-organic frameworks (MOFs) nanofillers within a polymer matrix, offer a highly promising solution for CO2 capture and separation. However, poor interfacial compatibility and filler aggregation in MMMs pose significant challenges to enhancing CO2/N2 separation performance. Here, we present a novel approach using amino ionic liquid modification to optimize MMMs, where the modified AFIL promotes the formation of ZIF-8 with well-defined facets and sharp edges, and enhances the compatibility between ZIF-8 particles and PIM-1 polymer matrix for favorable CO2 affinity and selective CO2 transport. The resulting 10 wt.% AFIL@ZIF-8/PIM-1 exhibits exceptional gas separation performance with a CO2 permeability of 7864262.2 Barrer and a CO2/N2 selectivity of 29.661.96. More importantly, the incorporation of AFIL into the ZIF-8 pores significantly enhances the thermal stability and aging resistance of AFIL@ZIF-8/PIM-1 MMMs via structural support and hydrogen bonding interactions. This work provides a practical approach to developing hybrid membranes for CO2/N2 separation, showcasing improved overall performance and strong interfacial compatibility.
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Analytical Methods
·
2024
·
IF 2.7
Zhiren Zhou,Yuting Tian,Lina Zou,Yanan Liu,Xueqing Zhang,Xiaojing Huang,Huanyu Ren,Zheng Li,Huiru Niu,Hao Liao,Xiaojing Zhang,Hongzhi Pan,Shengzhong Rong,Hongkun Ma
Nuclear matrix protein 22 (NMP22) is one of the most important tumor markers of bladder cancer and is significantly elevated in the urine of bladder cancer patients. Therefore, in this work, a highly sensitive ratiometric electrochemical immunosensor was constructed to detect NMP22 based on ZIF-8@MWCNTs@Chit@Fc@AuNPs composites. ZIF-8 had a large surface area and good adsorption ability. Multi-Walled Carbon Nanotubes (MWCNTs) can optimize the electrical conductivity of ZIF-8, so that the electrode surface of ferrocene (Fc) obtains a stable and strong electrochemical signal. In addition, AuPt-MB provided another strong detection signal methylene blue (MB) while immobilizing the secondary antibody (Ab2) through Au–N and Pt–N bonds. A ratiometric electrochemical sensor was formed based on ZIF-8@MWCNTs@Chit@Fc@AuNPs and AuPt-MB, which showed a great linear connection between IMB/IFc and the logarithmic concentration of NMP22 with a detection limit of 3.33 fg mL−1 (S/N = 3) under optimized specifications in the concentration interval of 0.01 pg mL−1 to 1000 ng mL−1. In addition, the ratiometric immunosensor showed good selectivity and stability.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yu Shu,Longfei Qiao,Jialong Geng,Cong Li,Bang Chen,Qidong Wang,Hiroshi Uyama,Yehua Shen
In this work, hierarchically ZIF-8@Cellulose acetate composite monolithic carbon (ZCMC) was fabricated for the first time by combining a template-free thermally induced phase separation (TIPS) method with in-situ ZIF-8 crystals doping followed by KOH activation. By altering ZIF-8 content and activation temperature, a series of ZCMC samples were prepared in order to analyze the effect of pore structure and surface chemical characteristics on CO 2 adsorption. The optimal sample of 20-ZCMC-800 exhibited the largest CO 2 uptake of 7.30 (0 °C) and 4.26 mmol/g (25 °C) at 1 bar, which was competitive with the majority of the reported porous carbons. Additionally, the CO 2 adsorption capacity after 10 cycles still remained at 96 % of its initial value and the ideal adsorption solution theory (IAST) CO 2 /N 2 selectivity was 21.31 at 25 °C, indicating excellent recyclability and good selectivity. Furthermore, it was found that the CO 2 adsorption capacity was considered to be linear relationship with micropore but independent on BET specific surface area. The contributions of N-containing functional groups and ZnO crystals created from ZIF-8 pyrolysis at high temperature for CO 2 adsorption were thoroughly discussed under density functional theory (DFT) and grand canonical Monte Carlo (GCMC). The results showed that pyrrole-N group contributed significantly to CO 2 adsorption by hydrogen bonding and Lewis acid-base interactions, while the ZnO crystals displayed the strong interaction with CO 2 by the chemisorption process. The CO 2 adsorption performance of ZCMC was mostly determined by the joint effect of micropore structure and surface chemical compositions. The thermodynamic parameters of Q st ranged from 23.03 to 33.23 kJ/mol, revealing the CO 2 adsorption still belonged to the scope of physisorption process. More importantly, the novel and feasible strategy presented herein is expected to provide an innovative approach for the design and discovery of ZIFs-based composite carbon materials for efficiently CO 2 adsorption.
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Food Bioscience
·
2025
·
IF 5.9
Tao Lu,Zhiguang Suo,Min Wei,Huali Jin,Yong Liu,Baoshan He,Renyong Zhao
β-lactoglobulin (β-LG) is a major allergen in milk what can provoke intense allergic reactions. Therefore, an accurate and efficient method is required for sensitive detection of β-LG. A label-free electrochemical aptasensor utilizing Au/Ag@ZIF-8 and dual amplification strategy has been designed for the detection of β-LG. Au/Ag@ZIF-8 nanocomposite is used as the electrode modification material, which has abundant relative surface area and exceptional conductivity behavior, and it can also serve to immobilize DNA strands. By combining RecJf exonuclease and hybridization chain reaction (HCR) dual amplification strategy, an apparent enhancement of electrochemical signal is obtained. β-LG undergoes target cycling in the effect of RecJf exonuclease, which dislodges complementary strand cDNA and further triggers HCR to provide a large number of sites for methylene blue embedding. The detection range of this aptasensor is 0.01–1000 ng/mL in the optimal detection conditions, with a limit of detection (LOD) of 5.37 pg/mL. The constructed electrochemical aptasensor possesses the superiorities of good specificity, preeminent accuracy and satisfied stability in the detection of β-LG. Moreover, it also demonstrates satisfactory detection performance in the detection of real samples, which indicates that the electrochemical aptasensor has a broad application prospect in protecting food safety and health.
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MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 2
·1-13
·
IF 5.3
Zhang Jiadong,Cui Yaoying,Dou Yanchao,Zhu Jingying,Ma Xiangyu,Guo Liming,Zhang Kai,Hao Nan,Feng Liangdong,Chen Yi
A highly sensitive and selective electrochemical biosensor was developed for the detection of kanamycin using a core-hollow-shell structured peroxidase-mimic nanozyme, CHS-Fe₃O₄@@ZIF-8. The synthesized CHS-Fe 3 O 4 @@ZIF-8 was characterized with scanning electron microscopy, transmission electron microscopy, and X-ray photoelectron spectroscopy. It was found that the CHS-Fe 3 O 4 @@ZIF-8 exhibits excellent peroxidase-like activity due to its ultra-thin hollow layer. Besides, CHS-Fe 3 O 4 @@ZIF-8 functionalized with complementary chains of kanamycin aptamer was anchored to the electrode surface via complementary base pairing with the kanamycin aptamer. Upon the presence of kanamycin, a strand displacement reaction was triggered leading to a reduction in the number of the CHS-Fe 3 O 4 @@ZIF-8, which slowed down the catalytic reaction of the substrate 3,3’,5,5’ -tetramethylbenzidine (TMB) facilitated by CHS-Fe 3 O 4 @@ZIF 8. Differential pulse voltammetry (DPV) was employed to measure and record changes in peak current resulting from catalytic oxidation product formation (oxidation product of TMB). The electrochemical signal exhibited a linear relationship with logarithmic variations in kanamycin concentration within a range spanning from 10 to 8000 pM and achieved an impressive detection limit as low as 7.52 pM. Furthermore, successful detection of kanamycin content in serum samples using this sensor demonstrated its good specificity and reproducibility. These findings indicate that the constructed electrochemical kanamycin sensor holds significant potential for practical applications. The biosensor demonstrated high selectivity, distinguishing kanamycin from other antibiotics, and exhibited good reproducibility, making it reliable for practical applications. The successful detection of kanamycin in serum samples further underscores the sensor’s potential for real-world applications, particularly in monitoring antibiotic residues in food products and clinical diagnostics. Graphical
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Liusha Cen,Fan Yu,Chengcai Li,Guojin Liu,Wangyong Jin,Hailin Zhu,Yuhai Guo
Recently, heterogeneous catalysts prepared by two phase metals were commonly used to activate PMS degradation. However, the synergistic effects of Zn and other metals on the activation of PMS were infrequently studied. In this work, novel PVDF@TA-ZIF-67/8 nanofibers were prepared successfully by first mineralization and then in-situ growth. The prepared PTZ70 exhibited an evidently higher photocatalytic activity than PVDF, PTC, PTZ0, PTZ10 and PTZ100 to degradation OFX (96.5 %). The effects of the mass ratio of Co and Zn, PMS dosage, coexisting ions and organic solvents on the degradation of OFX were concretely investigated. The radical trapping experiment and mechanism analysis showed that the synergistic effect of Co and Zn played a key role in PMS activation, accelerating the generation of 1 O 2 and •O 2 – . Combining the discussion of influencing factors and LC-MS analysis, four OFX degradation pathways were illustrated. In particular, we observed that the degradation OFX of PTZ70 was only slightly reduced by 5.6 % after five cycling, indicating the reusability, good stability and high environmental suitability of PTZ70 performance . This study offers a novel path for the design of catalytic membranes with controllable heterogeneous metal doping.
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RSC Medicinal Chemistry
·
2024
·
IF 4.1
Ji-Chao Guo,Shi-Hui Deng,Shu-Min Zhou,Xuan Zhou,Jiajia Du,Si-Han Zhou,Qi-Hua Zhao,Zhong-Yan Cai,Xiaoxia Ren,Ming-jin Xie
There is significant value in developing multifunctional drug delivery systems with high therapeutic efficiency for diagnosing and treating tumors. In this study, we synthesized the ATP-triggered and pH-sensitive material ZIF-90 using the liquid-phase diffusion method. This was done to load 10-hydroxycamptothecin (HCPT), and the FA-PEG-NH2 conjugate was synthesized through an amidation reaction. We further modified the HCPT@ZIF-90 nanocomposite by employing the Schiff base reaction to create the HCPT@ZIF-90-PEG-FA nanomaterial. Drug loading test results revealed a high HCPT drug loading of up to 22.3% by weight. In the drug release experiment, the cumulative drug release of HCPT@ZIF-90 nanomaterials in pH 5.4 and ATP solutions was the highest after 72 hours. The active targeted delivery of FA and the dual-responsive release of HCPT by ZIF-90 significantly enhanced the therapeutic effect of HCPT@ZIF-90-PEG-FA on human colon cancer cells (HCT116). In the cytotoxicity test, when 100 μg mL−1 of HCPT@ZIF-90-PEG-FA was incubated with cells, the cell survival rate was 16.61 ± 1.19%, significantly lower than that of the other experimental groups. This result indicates that HCPT@ZIF-90-PEG-FA exhibits excellent anti-tumor activity. Cell cycle experiments have shown that HCPT@ZIF-90-PEG-FA may inhibit the proliferation of cancer cells by blocking DNA synthesis and halting cell cycle progression. Cell uptake experiments showed that HCPT@ZIF-90-PEG-FA was mainly present in the cytoplasm of HCT1116 cells, indicating successful cellular entry of the drug to exert its therapeutic effect. In vivo experiments also demonstrated that HCPT@ZIF-90-PEG-FA nanomaterials can effectively eradicate HCT116 tumors. The utilization of the nano-drug carrier ZIF-90, along with the modification with PEG-FA, notably improved the therapeutic efficacy of HCPT. These results suggest that the system, with its active targeted delivery of FA and dual-responsive release of HCPT, could present a novel strategy for treating human colorectal cancer.
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JOURNAL OF SOLID STATE CHEMISTRY
·
2024
·
IF 3.2
Le Chen,An Xie,Nan Zhang,Jianjun Yin,Qun Chen,Mingyang He,Zhihui Zhang
Zeolitic-Imidazolate Framework 8 (ZIF-8), a porous crystalline absorbent, could be synthesized from the coordination reaction of zinc ions and 2-methylimidazole (2-mIM). ZIF-8 has a large specific surface area and a high adsorption capacity for n -hexane ( n HEX). However, ZIF-8 suffers from low selectivity for both linear and mono-chain alkanes. Therefore, ZIF-8 was modified through 2-mIM ligand being partly replaced by 2-nitroimidazole (2-nIM) through Vapor-Phase post-synthesis modification. The modified materials were denoted as ZIF-8-2-nIM-X (X = 24h, 48h, 72h). ZIF-8-2-nIM-X has a higher specific surface area and better thermal stability than ZIF-8. Further thermodynamic and kinetic calculations show that the affinity of hexane isomers on ZIF-8-2-nIM-X is spontaneous physical adsorption combined with an exothermic process. In contrast, kinetic studies show that the adsorption of hexane isomers on ZIF-8-2-nIM-X is a pseudo-second-order kinetic model. The batch and dynamic adsorption and separation properties of ZIF-8-2-nIM-X for hexane isomers were studied. The results of the one-component vapor adsorption equilibrium experiment show that ZIF-8-2-nIM-72h has the best adsorption separation coefficient at 293 K. The adsorption capacity of n HEX and 3-methylpentane (3MP) were 211.63 mg/g and 33.91 mg/g, respectively. Compared with ZIF-8 (selectivity coefficient: 1.08), the adsorption selectivity coefficient of the modified material is greatly improved. The adsorption selectivity coefficient of n HEX/3MP is 6.24 (ZIF-8-2-nIM-72h).
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Yi Zheng,Jinyue Song,Junzhou Men,Hui Xian,Yating Wang,Tao Jiang
Metal organic frameworks (MOFs) are regarded as the promising potential photocatalytic materials because of its high specific surface area , regular morphology and highly adjustable structure. Herein, introducing different addition percentage of 1-vinylimidazole to two-dimensional zeolite imidazole framework (ZIF-L) with leaf-shaped morphology was successfully prepared via water-assisted strategy and applied in the photocatalytic hydrogen evolution experiments. The results indicate that VZ-12 shows the highest photocatalytic activity with hydrogen production rate of 162.7 μmol g −1 h −1 , which is 3 times than that in VZ-0 (pure ZIF-L, 56.33 μmol g −1 h −1 ) under simulated sunlight. The enhanced performance is ascribed to the increased specific surface area observed via BET, narrow band gap ( E g ) explored through UV–vis DRS and decreased recombination of photo-generated charge carriers measured by photoluminescence (PL). In a word, the effort of our study provides a new idea for developing and fabricating efficient hydrogen production photocatalyst via water splitting.
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PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2024
·
IF 6.9
Liusha Cen,Fan Yu,Shixue Liu,Chengcai Li,Wangyong Jin,Chenliang Wang,Hailin Zhu,Yuhai Guo
The technology that catalyst activated perxymosulfate (PMS) has been widely used in the decomposition of organic pollutants. We prepared Zn and Co-based ZIF and obtained C-doping Co 3 O 4 / ZnO heterojunction after pyrolysis. C-doping Co 3 O 4 / ZnO heterojunction with cage core-shell structure was loaded on the polyvinylidene fluoride (PVDF) membranes with a layered porous structure by solvent-assisted nanoparticle embedding (SANE) method, where the carmine degradation reached 99.6 % by MC-430 activated Perxymosulfate (PMS) within 10 min. The influencing factors (such as the pyrolysis temperature, PMS dosage, and dye concentration) on OFX degradation were observed, and MC-430 exhibited good tolerance for these factors and a wide range of solution hydrogen ion concentrations (pH= 4–10). The strong reusability and stability analysis showed that the carmine degradation of the MC-430/PMS system changed minorly (from 99.6 % to 97.7 %) in 5 consecutive cycles without any treatment. The degradation mechanism was confirmed by capture experiments, in which the non-free radical path was the main one and the free radical path was the auxiliary one. Moreover, structure characterizations and density functional theory calculations verified that doped C sites provided a channel for electron transfer from Zn sites to Co sites, which increased the generation rate of reactive oxygen species (ROS) and prolonged the catalyst life. This work provides a new method for the preparation of nonmetallic doping bimetallic strong coupling catalysis.
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