MICROCHEMICAL JOURNAL
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2024
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IF 4.9
Yang Yu,Peng Li,Guohai Zheng,Liwei He,Dandan Ge,Zhehui Weng
A magnetic matrix solid phase dispersion (MSPD) method based on magnetic ZIF-8 (SDS@MZIF-8) and a deep eutectic solvent was developed and used to the extraction of crystal violet and rhodamine B in lake sediments. SDS@MZIF-8 was prepared and used as the extraction sorbent and dispersant in MSPD. The magnetic property of MZIF-8 facilitated the recovery of the extraction sorbent after the blending step. Hydrophilic deep eutectic solvents were prepared and used as efficient green dispersing solvents in MSPD. The use of magnetic sorbent in MSPD is simple and fast, eliminating some additional steps commonly used in the classical MSPD and shortening the extraction time. The parameters influencing the extraction efficiency were investigated and optimized. Under the optimized conditions, the intra- and inter-day relative standard deviations were less than 4.9 %. The linearity ranged from 2-400 µg g −1 with coefficients of determination higher than 0.9943. The detection and quantification limits of RB and CV varied between 0.3–0.5 μg g −1 and 1.0–1.8 μg g −1 , respectively. Finally, the developed method was applied to the analysis of RB and CV in the sediment samples. The recoveries ranged from 93.2 to 107.3 % and the relative standard deviations ranged from 0.8 to 4.9 %. The results suggest a high potential use of the proposed method to determine the organic pollutants in solid samples. Compared with the conventional MSPD extraction technique, the developed method considerably reduced the sample and solvent consumption, offering important environmental benefits.
研究领域:
分析化学
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环境科学
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产品关联
DOI
高影响因子
ACS Applied Nano Materials
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2023
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IF 5.9
Haizhi Zhang,Zhiping Sun,Cunhui Wu,Xinguang Qin,Gang Liu
The immobilization strategy between ZIF-8 and different enzymes has focused on in situ encapsulation and pore infiltration, while the surface attachment has been seldom reported because of less functional groups on the ZIF-8 surface. Here, a magnetic amine-functionalized ZIF-8 with hierarchical pores was designed for efficient covalent immobilization of α-amylase (α-Amy). By using Fe3O4 nanoparticles as the core and ZIF-8 as the shell, followed by Au3+–Zn2+ exchange reaction and β-mercaptoethylamine modification, the magnetic hollow ZIF-8 nanoparticle with amine groups on the surface was synthesized. With the assistance of glutaraldehyde, an α-Amy-magnetic hollow ZIF-8 composite was prepared and fully characterized by scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectrometry, X-ray photoelectron spectroscopy, energy-dispersive X-ray spectroscopy element mapping analysis, and vibration sample magnetometry. Then, the catalytic activity of immobilized α-Amy was explored with a Km of 2.307 mg/mL and Vmax of 0.506 mg/mL·min, indicating excellent catalytic activity. The study about stability and reusability demonstrated that the catalytic activity of immobilized α-Amy remained above 50% after 10 times of reuse. Thus, the designed magnetic amine-functionalized ZIF-8 was verified to be a nice carrier for covalent enzyme immobilization.
研究领域:
生物化学
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材料科学
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酶工程
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产品关联
DOI
高影响因子
BIOCHEMICAL ENGINEERING JOURNAL
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2021
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IF 3.978
Yumei Xiao,Yanxia Chen,Ruowei Lu,Yongchao Wang,Cuijuan Wang
A novel hierarchical magnetic zeolitic imidazolate framework-8 material (Hierarchical mZIF-8) is fabricated by using the cetyltrimethylammonium bromide (CTAB) and L -histidine (His) as templates. Comparing to usual magnetic ZIF-8 (mZIF-8), there are not only micropores (1.1 nm) but also new mesopores (23.3 nm) in hierarchical mZIF-8 material. It is the first time that Candida rugosa lipase (CRL) has been immobilized into hierarchical mZIF-8 with significantly higher enzyme loading capacity than mZIF-8. Furthermore, the temperature stability, pH stability and recycling convenience of immobilized CRL are all enhanced compared with free CRL.
研究领域:
生物化学
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材料科学
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酶工程
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产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2025
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IF 7.7
Shuai Zhang,Jincheng Xiong,Boyan Sun,Chunchao Yin,Yongjun Zheng,Xingxing Liu,Yanchen Gao,Xiaomei Wang,Sihan Wang,Haiyang Jiang
Emerging contaminants seriously jeopardize food safety and even human health. This study presents the formation of all-in-one aggregation-induced emission (AlE)-type immunomagnetic ZlF-8 (AlMZ) through an ultra-simple self-assembly method in an aqueous phase, successfully harnessing the functions of immuno-recognition, luminescence, and magnetism, Here, we have achieved a dual enhancement in detection efficiency rapidly enriching targets and performing a triple lateral flow immunoassay (LFlA) for ractopamine, diethylstilbestrol, and chloramphenicol within 40 minutes, The dual readout biosensor was then configured to automatically extract the color intensity values of the three test lines using a smartphone. A portable sensing platform ensures stable temperature and light intensity in non-laboratory environments, providing favorable conditions for immunological detection. This study demonstrated low detection limits of 0.11, 0.14, and 0.01ug/L for ractopamine, diethylstilbestrol, and chloramphenicol, respectively, Applications in pork and tap water showed excellent practicality and stability, with recovery rates ranging from 87.2 % to 112.7 %, emphasizing the potential for applications in food and environmental safety.
研究领域:
食品安全检测
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环境监测
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生物传感技术
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产品关联
DOI
高影响因子
Journal of Water Process Engineering
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2022
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IF 7.34
Yu Zhang,Hong Zheng,Pengyi Zhang,Qi Zuo,Baichao Zhang,Xueying Ren
The deep purification of trace heavy metals in drinking water is of great significance and has received considerable attention worldwide. 2,5-dimercapto-1,3,4-thiadiazole (DMTD) functionalized magnetic ZIF-8 adsorbent (Fe 3 O 4 @ZIF-8-DMTD) using a novel one-pot post coordination modulation method at room temperature could effectively adsorb trace heavy metals from drinking water through cooperating with the abundant functional groups and surface charges. The negative surface charges promoted the rapid accumulation of trace heavy metals on the surface of the adsorbent, meanwhile, the abundant thiol/nitrogen sites contributed to their adsorption, thus the adsorption rate and adsorption capacity of trace heavy metals were greatly improved. For trace Pb(II) (150 ppb), the effluent concentration could meet the World Health Organization (WHO) standard (≤10 ppb) within 10 s after adsorption by Fe 3 O 4 @ZIF-8-DMTD, and the cumulative adsorption capacity that met WHO standard was 12.11 mg/g. Fe 3 O 4 @ZIF-8-DMTD also showed high stability in a broad pH range and excellent adsorption performance in a wide low concentration range. The effluent concentration still could meet the WHO standard when the initial Pb(II) concentration was 11.70 ppm, and the corresponding adsorption capacity reached 35.00 mg/g. Moreover, the capture experiments for multiple heavy metals that coexisted in tap water showed that the effluent concentrations of Hg(II), Pb(II), Cu(II), Cd(II), and Cr(III) could be lower than the allowable limits in a few minutes. The adsorbent could also be easily recovered using magnets and regenerated by thiourea solution, which showed great application potential for the purification of trace heavy metals in drinking water.
研究领域:
环境科学
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材料科学
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水处理
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
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