Advanced Optical Materials
·
2026
·Vol. 14
·期 34
·e71656
·
IF 7.2
Ke Wang,Ziyang Zhao,Aidi Zhang,Jicun Ren
InP quantum dots (QDs) are promising for next-generation displays due to their superior color purity, high quantum yield, tunable emission, and non-toxicity. However, their practical application is limited by instability under heat, oxygen, and intense illumination. To address this critical issue of stability, we proposed a dual-layer encapsulation strategy. Firstly, InP/ZnSe/ZnS QDs are synthesized via a “one-pot” approach. Then, mZIF-8@QDs materials are prepared by embedding QDs into a mesoporous zeolite imidazolate framework (mZIF) formed after pore structure modification and surface modification. Finally, a novel vacuum-assisted deposition method is employed to uniformly polymerize polymethyl methacrylate (PMMA) on the surface of mZIF-8@QDs, thereby achieving a secondary coating and obtaining the mZIF-8@QDs@PMMA composite material. The QDs loading capacity was significantly enhanced by modification of the saturated fatty acid for mesoZIF-8. The synthesized fluorescent composite material exhibits high quantum yield, long fluorescence lifetime, good photostability and thermostability. Furthermore, this composite material is used as a color conversion layer in liquid crystal displays (LCDs). The experimental results indicate that the composite material has exceptional durability, and retains over 95% of its initial luminance after 1000 h of accelerated aging under continuous high-temperature and high-intensity blue light irradiation.
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高影响因子
TALANTA
·
2025
·
IF 6.1
Yuanyuan Ding,Ping Wang,Na Wang,Liyun Kong,Min Li,Jing Wang,Tao Zhang
The immunoassay methods, stand as the gold standard in biomedicine, are widely used in diagnostics. However, they often encounter inherent limitations in practical applications, such as the poor stability of enzymes and antibodies, and the laborious process of preparing enzyme-antibody conjugates through covalent bonding. Mas-related G-protein-coupled receptor X2 (MRGPRX2) has been identified as a blood-based diagnostic biomarker for chronic spontaneous urticaria (CSU). In this study, a bifunctional enzyme-labeled antibody (anti-MRGPRX2&HRP@ZIF-8) was successfully constructed by integrating horseradish peroxidase (HRP) into ZIF-8 during its synthesis, followed by adsorption of anti-MRGPRX2 onto the surface of HRP@ZIF-8. The resulting anti-MRGPRX2&HRP@ZIF-8 complex not only preserved its antigen-capturing capability but also exhibited improved stability. The established chemiluminescence immunoassay (CLIA) method based on anti-MRGPRX2&HRP@ZIF-8 demonstrated enhanced stability and achieved a lower detection limit (1.035 ng/mL) compared to conventional enzyme-linked immunosorbent assay (ELISA) method. Furthermore, MRGPRX2 was successfully detected in serum samples by the established method, demonstrating its suitability for the diagnosis of CSU in real clinical samples. Consequently, this study presented a promising approach for simplifying the preparation of enzyme-antibody conjugates and highlighted the potential of metal-organic framework (MOF)-based composites in biomedical applications.
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高影响因子
FUEL
·
2023
·
IF 7.4
Yuxiang Mao,Jun Cheng,Hao Guo,Lei Qian,Yang Xu,Jiacan Tu,Weijuan Yang
To strengthen active sites in zeolitic imidazolate frameworks (ZIFs) to effectively convert microalgal lipids into biodiesel, acid-base bifunctional single-atom catalysts with Zn-N x coordination were synthesized through pyrolyzing ZIF-8. The saturated coordinated Zn-N 4 sites were destroyed and converted to unsaturated coordinated Zn sites and surrounding N atoms at 700 °C, which enhanced Lewis acidity and basicity, respectively. The Zn-N content in the catalyst decreased from 77.68 % to 43.26 %, while that of pyridinic N increased from 8.14 % to 36.73 %. The acidity of the catalyst increased from 0.498 to 3.979 mmol/g, whereas basicity increased from 0.219 to 0.650 mmol/g. According to density functional theory calculations, unsaturated coordinated Zn-N x (x = 1, 2, 3) sites exhibited lower free energies and reaction energy barriers in free fatty acid esterification. The energy barriers for rate-determining steps over Zn-N 4 , Zn-N 3 , Zn-N 2 , and Zn-N 1 sites were + 1.01 eV, +0.82 eV, +0.63 eV, and + 0.54 eV, respectively. Therefore, the optimum catalyst exhibited a high conversion efficiency of 97.9 %, which was better than that of ZIF-8 (85.4 %).
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MOLECULES
·
2023
·Vol. 28
·期 7
·3117
·
IF 4.6
Zefen Wang,Qian Zhou,Siyuan Liu,Dankui Liao,Pengru Liu,Xiongdiao Lan
Immobilized angiotensin-converting enzyme (ACE) is a promising material for the rapid screening of antihypertensive drugs, but the nonspecific adsorption is a serious problem in separation processes involving complex biological products. In this study, triblock copolymers with dopamine (DA) block as anchors and PEG block as the main body (DA-PEGx-DA) were attached to an immobilized ACE (ACE@mZIF-8/PDA, AmZP) surface via the “grafting to” strategy which endowed them with anti-nonspecific adsorption. The influence of DA-PEGx-DA chain length on nonspecific adsorption was confirmed. The excellent specificity and reusability of the obtained ACE@mZIF-8/PDA/DA-PEG5000-DA (AmZPP5000) was validated by screening two known ACE inhibitory peptides Val-Pro-Pro (VPP, competitive inhibitory peptides of ACE) and Gly-Met-Lys-Cys-Ala-Phe (GF-6, noncompetitive inhibitory peptides of ACE) from a mixture containing active and inactive compounds. These results demonstrate that anchored polymer loops are effective for high-recognition selectivity and AmZPP5000is a promising compound for the efficient separation of ACE inhibitors in biological samples.Keywords:polymer loops;angiotensin converting enzyme;immobilization of enzyme;mesoporous ZIF-8;recognition selectivity
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Materials
·
2023
·Vol. 16
·期 9
·3378
·
IF 3.4
Qing Liu,Xiang Gao,Zhibao Liu,Ligang Gai,Yan Yue,Hongfang Ma
An electrochemical sensor based on carbon quantum dots (CQDs) and zeolitic imidazolate framework-8 (ZIF-8) composite was fabricated to detect lead(II). The CQDs (2.47 ± 0.52 nm) were synthesized from platanus acerifoli leaves by carbonization and the hydrothermal method. Under the optimal conditions, the fabricated electrochemical sensor had excellent performance in detecting Pb2+. The linear range for Pb2+was 1 nM–1 μM, and the limit of detection (LOD) was 0.04 nM and the limit of quantification (LOQ) was 0.14 nM. Moreover, when the solution contained Pb2+and Cd2+, the linear range for Pb2+was 50 nM to 1 μM and the LOD was 0.02 nM. When the solution contained Pb2+and Cu2+, the linear range for Pb2+was 50 nM–750 nM and LOD was 0.07 nM. Furthermore, even if the solution contained Pb2+, Cd2+and Cu2+, the linear range for Pb2+was 50 nM–1 μM and the LOD was 0.04 nM. The X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectrometer (FTIR) and Brunauer-Emmet-Teller (BET) results indicated that the composite electrode materials had abundant oxygen-containing functional groups, a large specific surface area and pore structure, which are conducive to the adsorption of heavy metal ions and improve the detection performance.
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CHEMOSPHERE
·
2022
·
IF 8.943
Mengya Li,Lei Li,Yue Sun,Hengyan Ma,Hui Zhang,Feng Li
Multi-pesticides pollution induced by organophosphorus insecticides (OPs) and aryloxyphenoxypropionate herbicides (AOPPs) has become a significant challenge in bioremediation of water pollution due to their prolonged and over application. Though a number of physical, chemical, and biological approaches have been developed for different pesticides, the explorations usually focus on eliminating single pesticide pollution. Herein, a heterostructure nanocomposite OPH/QpeH@mZIF-8, encapsulating OPs hydrolase OPH and AOPPs hydrolase QpeH in the magnetic zeolitic imidazolate frameworks-8 (mZIF-8), was synthesized through a facile one-pot method in aqueous solution. The immobilized OPH and QpeH in mZIF-8 showed high activities towards the two most common OPs and AOPPs, i.e., chlorpyrifos and quizalofop- P -ethyl, which were hydrolyzed to 3,5,6-Trichloro-2-pyridino (TCP) and quizalofop acid, respectively. Moreover, the magnetic nanocatalyst possessed great tolerance towards broad pH range, high temperatures, and different chemical solvents and excellent recyclability . More importantly, compared to free OPH and QpeH, OPH/QpeH@mZIF-8, with significantly enhanced degradation capability, exhibited enormous potential for simultaneous removal of chlorpyrifos and quizalofop-p-ethyl from the surface and industrial wastewater . Overall, the study demonstrates the applicability of this strategy for utilizing magnetic nanocatalysts encapsulating multiple enzymes due to its simplicity, high efficiency, and economic benefits to removing pesticide compound pollution from various water resources.
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CHEMICO-BIOLOGICAL INTERACTIONS
·
2022
·
IF 5.168
Moath Refat,Guoqiang Zhang,Abdulaziz Ahmed A.Saad,Salem Baldi,Fang Zheng,Xin'an Wu
Cholestasis is primarily caused by bile acid homeostasis dysregulation, resulting in retention, aggregation, and accumulation of the toxic cholate in the hepatocytes. Existing therapies for cholestasis are limited, demanding the urgent development of novel drugs. As a result, targeting FXR specifically promises a unique treatment strategy for cholestasis. The current study aims to evaluate the influence of 7, 8-dihydroxy-4-methyl coumarin (DMC) against alpha-naphthyl isothiocyanate (ANIT)-induced liver injury in mice. The “Computer-Aided Drug Design” (CADD) and molecular docking study anticipated that DMC would proficiently bind and activate the FXR. Accordingly, the hepatoprotective activity of DMC against ANIT-induced hepatotoxicity and cholestasis was investigated in ANIT-treated HepaRG cells and the ANIT-induced cholestatic mouse model. Outcomes indicated the protective effects of DMC against ANIT toxicity in HepaRG cells after 24 h of intervention and animals after seven days of treatment. DMC partially blocks ANIT-induced increases in serum markers of hepatocellular injury , liver and gall bladder enlargement , and hepatic necrosis . Western blotting revealed that DMC alleviates ANIT-induced hepatotoxicity and cholestasis via activating the FXR receptor and regulating CYP7A1 , the enzyme responsible for bile acid synthesis. DMC exhibited protective activity against cholestasis through activating FXR, suggesting it might be a promising strategy for preventing and treating cholestatic liver disease.
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高影响因子
JOURNAL OF POROUS MATERIALS
·
2022
·Vol. 30
·期 4
·1171-1182
·
IF 2.523
Zhu Gang,Zhang Chaoling,Li Kaiqian,Xi Xuedong,Zhang Xupeng,Lei Hong
Zeolitic imidazolate frameworks (ZIFs) materials have been extensively studied in various enviornmentally friendly application. However, due to the powdered crystalline state and intrinsic brittleness of ZIFs, their processability and handling remain a significant challenge. Combining ZIFs and wood aerogel (WA) substrates to obtain advanced composites is excepted to further enhance their performance with higher practicability. Herein, a multifunctional ZIF-8@WA composite was successfully fabricated via in-situ growth of ZIF-8 nanoparticles on the wood aerogel obtained by selectively removing lignin and hemicellulose from balsa wood. Owing to the structural characteristics of ZIFs and WA, the resultant ultralight ZIF-8@WA composite exhibit hierarchical porostity, efficient dye adsorption performance and superior flame retardancy. At a 7.5 wt.% ZIF-8 loading, the composite displays high removal efficiency up to 95.0% for methylene blue (MB) and the adsorption capacity can reach 198.33 mg g −1 at 298 K. The MB removal efficiency could maintain 88.87% even after five cycles of repeated usage. Moreover, the incorporation of ZIF-8 has significantly effect on thermal stability at the early stage and char layer formatting of WA substrate. Compared with the pristine WA, the peak of heat release rate of the ZIF-8@WA hybrid materials exhibited a drastic decline by 63.4% from 145.8 to 53.3 W g −1 and the total heat release from 13.8 to 4.4 kJ g −1 .This work offers a new avenues for designing and constructing functionalized MOF@wood-derived advanced composite that may boost their environmental- and green building-related applications.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Wei Yang,Mingli Cao
The removal of heavy metal ions from the aqueous environment is an important topic as heavy metal pollution is widely distributed in water bodies, causing serious damage to aquatic ecosystems and worsening the already scarce freshwater resources. In this work, we report the synthesis of novel ZIF-8@GO-COOH composite nanosorbent materials by in situ self-assembly. The physicochemical properties of the composites were investigated using relevant characterisation techniques, and the adsorption capacity of ZIF-8@GO-COOH for copper and lead ions in aqueous solution was tested by batch adsorption experiments. The adsorption behaviour was analysed by combining adsorption kinetics, adsorption isotherm model and Van't Hoff model. The results showed that the adsorption capacities of ZIF-8@GO-COOH for Cu(II) and Pb(II) were 93.26 mg/g and 95.875 mg/g, respectively, when the initial heavy metal ion concentration was 100 mg/L, the adsorption time was 60 min, the temperature was 293 K and the pH conditions were suitable. The high adsorption performance of ZIF-8@GO-COOH was attributed to its surface with abundant oxygen-containing functional groups and excellent specific surface area, which gives it a significant advantage in the removal of heavy metal ions from aqueous solutions.
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高影响因子
ENVIRONMENTAL POLLUTION
·
2022
·
IF 9.988
Jijie Kong,Xiaoyu Cao,Wen Huang,Chao Li,Qiming Xian,Shaogui Yang,Shiyin Li,Cheng Sun,Huan He
The occurrence of nitrated polycyclic aromatic hydrocarbons (NPAHs) in sediments has been widely reported, but research on NPAH bioavailability is lacking. In this study, a self-made zeolite imidazolate framework-8/hexagonal boron nitride (ZIF-8/h-BN) solid-phase microextraction (SPME) fiber and commercial Tenax are compared as efficient tools to predict the bioavailability of NPAHs in sediments with bioassays using Cipangopaludina chinensis . During the process of SPME, the NPAH concentrations on the ZIF-8/h-BN fibers reached extraction equilibrium after 72 h. The fiber extraction of NPAHs in sediments was well-fitted by the pseudo first-order kinetic model with a rate constant of 2 × 10 −2 h −1 (R 2 > 0.98). The extraction rates ranking of NPAHs in sediments was 2-nitrobiphenyl>1-nitropyrene>5-nitroacenaphthene>2-nitrofluorene. Compared with SPME, NPAH concentrations reached equilibrium after 168 h for the Tenax extraction. The orders of magnitude of fast, slow, and very slow desorption rate constants were 10 −1 , 10 −2 , and 10 −4 , respectively. At extraction equilibrium (168 h), the SPME was close to the bioavailability of the NPAHs in sediments to Cipangopaludina chinensis with a slope statistically approximated to one. In addition, the linear regression for SPME (R 2 = 0.7285) was slightly higher than that of the Tenax extraction (R 2 = 0.7168) over a short time (6 h). This could be because the coating material of ZIF-8/h-BN can rapidly adsorb freely dissolved NPAHs, and the SPME fibers can accurately predict the bioaccumulated concentrations of NPAHs in exposed organisms by measuring the concentration of NPAHs in the pore water of sediment. This study provides a time-saving and easy procedure to predict the bioavailability of NPAHs in sediments.
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高影响因子
Nanoscale Advances
·
2023
·Vol. 5
·期 5
·1433-1449
·
IF 4.7
Liuyang Wang,Xuan Lin,Yanan Sheng,Hongyu Zhu,Zhengjun Li,Zhiguo Su,Rong Yu,Songping Zhang
Encapsulating antigens with zeolitic imidazole framework-8 (ZIF-8) exhibits many advantages in vaccine development. However, most viral antigens with complex particulate structures are sensitive to pH or ionic strength, which cannot tolerate harsh synthesis conditions of ZIF-8. Balancing the viral integrity and the growth of ZIF-8 crystals is crucial for the successful encapsulation of these environment-sensitive antigens in ZIF-8. Here, we explored the synthesis of ZIF-8 on inactivated foot and mouth disease virus (known as 146S), which is easily disassociated into no immunogenic subunits under the existing ZIF-8 synthesis conditions. Our results showed that intact 146S could be encapsulated into ZIF-8 with high embedding efficiency by lowering the pH of the 2-MIM solution to 9.0. The size and morphology of 146S@ZIF-8 could be further optimized by increasing the amount of Zn2+ or adding cetyltrimethylammonium bromide (CTAB). 146S@ZIF-8 with a uniform diameter of about 49 nm could be synthesized by adding 0.01% CTAB, which was speculated to be composed of single 146S armored with nanometer-scale ZIF-8 crystal networks. Plenty of histidine on the 146S surface forms a unique His-Zn-MIM coordination in the near vicinity of 146S particles, which greatly increases the thermostability of 146S by about 5 °C, and the nano-scale ZIF-8 crystal coating exhibited extraordinary stability to resist EDTE-treatment. More importantly, the well-controlled size and morphology enabled 146S@ZIF-8(0.01% CTAB) to facilitate antigen uptake. The immunization of 146S@ZIF-8(4×Zn2+) or 146S@ZIF-8(0.01% CTAB) significantly enhanced the specific antibody titers and promoted the differentiation of memory T cells without adding another immunopotentiator. This study reported for the first time the strategy of the synthesis of crystalline ZIF-8 on an environment-sensitive antigen and demonstrated that the nano-size and appropriate morphology of ZIF-8 are crucial to exert adjuvant effects, thus expanding the application of MOFs in vaccine delivery.
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高影响因子
CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
·
2022
·
IF 1.193
Jin-Ling PU,Pei-Hong TONG,Yong-Juan MENG,Jian-Ping LI
A bilayer-structured ZIF-8 composite with dual functions of sensing and recognition was synthesized, with ZIF-8 serving as an electrochemiluminescence (ECL) probe carrier and molecularly imprinted membrane to construct a molecularly imprinted electrochemiluminescence sensor. The inner layer was a ZIF-8 layer loaded with a luminescent probe, which was obtained by the reaction of zinc ions with 2-methylimidazole on the magnetic Au@CoFe 2 O 4 surface in the presence of Ru(bpy) 3 2+ , the composite magnetic particle is marked as ZIF(Ru)/Au@CoFe 2 O 4 . The outer layer was a layer with recognition function using ZIF-8 as an imprinted membrane, which was obtained by a layer-by-layer self-assembly method on the surface of ZIF(Ru)/Au@CoFe 2 O 4 with dopamine (DA) as a template molecule, which was marked as ZIF(MIP)/ZIF(Ru)/Au@CoFe 2 O 4 . After eluting the template molecules, the composite particle was immobilized on the surface of a magnetically controlled glassy carbon electrode (MGCE) to obtain a molecular imprinting (MIP) modified electrode. When dopamine molecules were re-adsorbed by the MIP, a charge/energy transfer between dopamine and Ru(bpy) 3 2+ occurred. It subsequently led to the quenching of electrochemiluminescence, which was used as the basis for the detection of dopamine by a molecularly imprinted electrochemiluminescence sensor. When the dopamine concentration was in the range of 1.0 × 10 −14 –5.0 × 10 −10 mol/L, the ECL intensity change of the sensor and the dopamine concentration had a good linear relationship, and the detection limit was 4.8 × 10 −15 mol/L. The molecularly imprinted electrochemiluminescence sensor was successfully applied to the detection of dopamine in human serum samples.
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