从具有过氧化物酶催化性能的高含铁堇青石中合成 Fe-ZSM-5 沸石

IF 5.3 2区 地球科学 Q2 CHEMISTRY, PHYSICAL
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引用次数: 0

摘要

由矿物材料合成的沸石产品受到广泛关注,而将矿物中的杂原子金属引入沸石的报道却很少。本文研究了不同硅源、水热反应时间和模板量对 Fe-ZSM-5 结晶的影响。通过 X 射线衍射 (XRD)、傅立叶变换红外光谱 (FT-IR)、X 射线电子能谱 (XPS) 和扫描电子显微镜 (SEM) 对 ZSM-5 的形态和结构进行了表征。然后用 Fe-ZSM-5 催化 3,3′,5,5′-四甲基联苯胺(TMB),以评估其作为一种纳米酶催化剂的酶催化性能。结果表明,Fe-ZSM-5 具有类似过氧化物酶的活性,能在过氧化氢(H2O2)的存在下将 TMB 氧化成有色物质。动力学分析表明,与天然辣根过氧化物酶(HRP)相比,Fe-ZSM-5 过氧化物酶模拟物对 TMB 底物的亲和力和酶催化速度较差。不过,它在极端的 pH 值、温度和离子强度条件下表现出了极佳的稳定性。这项工作为利用天然矿物资源构建功能纳米酶提供了可能的参考。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Synthesis of Fe-ZSM-5 zeolite from high iron-containing palygorskite with peroxidase-like catalytic performance
Zeolite products synthesized from mineral materials are receiving widespread attention, while there are few reports on the introduction of heteroatom metals from minerals into zeolites. Herein, the effects of different silicon sources, hydrothermal reaction time and the amount of template on the crystallisation of Fe-ZSM-5 were investigated. The morphology and structure of ZSM-5 were characterized by X-ray diffraction (XRD), fourier transform infrared spectroscopy (FT-IR), X-ray electron spectroscopy (XPS) and scanning electron microscopy (SEM). The catalysis of 3,3′,5,5′-tetramethylbenzidine (TMB) by Fe-ZSM-5 was then carried out to evaluate its enzyme-like catalytic performance as a type of nanozyme catalyst. The results showed that Fe-ZSM-5 exhibited peroxidase-like activity, oxidizing TMB into a colored substance in the presence of hydrogen peroxide (H2O2). Kinetic analysis implied that, compared with natural horseradish peroxidase (HRP), Fe-ZSM-5 peroxidase mimics exhibit inferior affinity and enzymatic catalytic velocity towards the TMB substrate. However, it exhibited excellent stability under extreme pH, temperature, and ionic strength conditions. This work provides a possible reference for the construction of functional nanozymes using natural mineral resources.
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来源期刊
Applied Clay Science
Applied Clay Science 地学-矿物学
CiteScore
10.30
自引率
10.70%
发文量
289
审稿时长
39 days
期刊介绍: Applied Clay Science aims to be an international journal attracting high quality scientific papers on clays and clay minerals, including research papers, reviews, and technical notes. The journal covers typical subjects of Fundamental and Applied Clay Science such as: • Synthesis and purification • Structural, crystallographic and mineralogical properties of clays and clay minerals • Thermal properties of clays and clay minerals • Physico-chemical properties including i) surface and interface properties; ii) thermodynamic properties; iii) mechanical properties • Interaction with water, with polar and apolar molecules • Colloidal properties and rheology • Adsorption, Intercalation, Ionic exchange • Genesis and deposits of clay minerals • Geology and geochemistry of clays • Modification of clays and clay minerals properties by thermal and physical treatments • Modification by chemical treatments with organic and inorganic molecules(organoclays, pillared clays) • Modification by biological microorganisms. etc...
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