海泡石纳米材料催化化学发光及其分析应用

发布时间：2019-01-01 20:59

【摘要】：化学发光分析不需要外界光源,具有检测灵敏度高、线性范围宽、仪器简单经济、分析速度快等优点,是光谱分析中的研究热点之一。由于大部分化学发光反应的反应速率慢、量子产率低,寻找合适的催化剂来提升化学发光反应的发光强度一直是化学发光研究领域的热门课题。作为一种绿色环保的无机纳米功能材料,海泡石以其独特的多孔结构和纤维形貌受到了研究者们的广泛关注,被广泛地应用于催化、吸附、功能材料等领域,但是在化学发光方面的应用却未见报道。本论文首次将海泡石纳米材料与化学发光分析法相结合,研究了海泡石对鲁米诺化学发光体系的影响,建立了基于海泡石-鲁米诺-过氧化氢化学发光新体系的化学发光分析法,结合流动注射分析技术实现了对环境、食品样品中微量成分的高灵敏度测定,拓宽了海泡石的应用范围,在开发新型、高效化学发光体系催化剂方面做出了积极、有益的探索。本文主要取得了以下研究成果：1.开发了一种新型高效的鲁米诺-过氧化氢化学发光体系的催化剂—海泡石,考察了海泡石的pH值、反应温度和时间等因素对鲁米诺-过氧化氢化学发光体系的影响。研究结果表明,在pH值为1.0,100℃下反应4h得到的海泡石晶形规整、形貌均一,催化效果良好,增敏倍数近400倍。2.基于海泡石催化鲁米诺-过氧化氢化学发光体系,建立了一种快速准确测定过氧化氢含量的化学发光方法。该分析方法的线性范围为1.0×10.8～8.0à10-6 mol·L-1,检出限(S/N=3)为8.8×10.9 mol.L-1。该方法成功应用于自来水和雨水样品中过氧化氢含量的测定,加标回收率在98～104%之间。3.基于海泡石催化鲁米诺-过氧化氢化学发光体系,设计并开发了一种新型的化学发光传感器,该传感器测定葡萄糖的线性范围为7.5×10.6～ 2.0×10-3 mol.L-1，检出限(S/N=3)为3.2×10.6 mOl.L-1。采用该传感器测定饮料中葡萄糖的浓度,得到了令人满意的分析结果。
[Abstract]:Chemiluminescence analysis has the advantages of high detection sensitivity, wide linear range, simple and economical instrument, fast analytical speed and so on. It is one of the research hotspots in spectral analysis. Because the reaction rate of most chemiluminescence reactions is slow and the quantum yield is low, it has been a hot topic in the field of chemiluminescence research to find suitable catalysts to enhance the luminescence intensity of chemiluminescence reactions. As a kind of green inorganic nano-functional materials, sepiolite has been widely concerned by researchers for its unique porous structure and fiber morphology, and has been widely used in the fields of catalysis, adsorption, functional materials and so on. However, applications in chemiluminescence have not been reported. In this paper, the effect of sepiolite on the luminol chemiluminescence system was studied by combining the sepiolite nanomaterials with chemiluminescence analysis for the first time. A new chemiluminescence analysis method based on sepiolite-Lumino-hydrogen peroxide chemiluminescence system was established. A high sensitivity method for the determination of trace components in food and environment samples was achieved by flow injection analysis. The application range of sepiolite has been widened and active and beneficial exploration has been made in the development of new and high efficient chemiluminescence system catalysts. The main achievements of this paper are as follows: 1. Sepiolite, a new and efficient catalyst for luminol hydrogen peroxide chemiluminescence system, was developed. The effects of pH value, reaction temperature and reaction time on the luminol hydrogen peroxide chemiluminescence system were investigated. The results show that the sepiolite prepared by reaction at 1.0100 鈩，

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