Long-Lasting and Intense Chemiluminescence of Luminol Triggered by Oxidized g-C3N4 Nanosheets
Long-Lasting and Intense Chemiluminescence of Luminol Triggered by Oxidized g-C3N4 Nanosheets
复制标题
氧化 g-C3N4 纳米片引发鲁米诺的持久且强烈的化学发光
DOI：
10.1021/acs.analchem.0c02221
复制
发表时间：
2020
影响因子：
7.4
通讯作者：
Li Baoxin
中科院分区：
文献类型：
--
作者：
Sun Xiaoqing;Lei Jing;Jin Yan;Li Baoxin
已知的大多数化学发光体系都是闪光型的，而长时间、强发射的化学发光体系非常有利于准确的化学发光定量分析和成像分析。在这项工作中，我们发现被氧化的g-C3N4(g-CNOX)可以触发鲁米诺-H_2O_2产生持久而强烈的化学发光。化学发光持续时间超过10min，在暗室中肉眼可观察到。通过化学发光光谱、X-射线光电子能谱和电子自旋共振谱，提出了该化学发光反应的可能机理。这种强而持久的化学发光归因于g-CNOX纳米片的高催化活性和g-CNOX表面过氧化氢不断生成活性氧物种。充分利用该体系的化学发光特性，提出了一种“非原位混合”的化学发光测量模式。与传统的“原位混合式”化学发光测量方式相比，该测量方式操作方便，重现性好。这项工作不仅提供了一个持久的化学发光反应，而且加深了对g-C3N4材料的结构和性质的理解。
Most of the known chemiluminescence (CL) systems are flash-type, whereas a CL system with long-lasting and strong emission is very favorable for accurate CL quantitative analysis and imaging assays. In this work, we found that the oxidized g-C3N4(g-CNOX) could trigger luminol-H2O2to produce a long-lasting and intense CL emission. The CL emission lasted for over 10 min and could be observed by the naked eye in a dark room. By means of a CL spectrum, X-ray photoelectron spectra, and electron spin resonance spectra, the possible mechanism of this CL reaction was proposed. This strong and long-duration CL emission was attributed to the high catalytic activity of g-CNOXnanosheets and continuous generation of reactive oxygen species from H2O2on g-CNOXsurface. Taking full advantage of the long-lasting CL property of this system, we proposed one “non-in-situ mixing” mode of CL measurement. Compared with the traditional “in-situ mixing” CL measurement mode, this measurement mode was convenient to operate and had good reproducibility. This work not only provides a long-lasting CL reaction but also deepens the understanding of the structure and properties of g-C3N4material.