Nano-Anatase-Enhanced Peroxyoxalate Chemiluminescence and Its Sensing Application
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- 作者：Liang Yang ; Guijian Guan ; Suhua Wang ; Zhongping Zhang
- 刊名：The Journal of Physical Chemistry C
- 出版年：2012
- 出版时间：February 9, 2012
- 年：2012
- 卷：116
- 期：5
- 页码：3356-3362
- 全文大小：407K
- 年卷期：v.116,no.5(February 9, 2012)
- ISSN：1932-7455
文摘
This paper reports a new nanosized anatase particle enhanced chemiluminescence sensor that utilizes the catalytic surface of anatase for sensitive detection of the herbicide 2,4-dichlorophenoxyacetic acid (2,4-D). This chemiluminescence sensor was composed of anatase nanoparticles grafted with the nitrobenzoxadiazole (NBD) fluorophore, bis(2,4,6-trichlorophenyl)oxalate (TCPO), and hydrogen peroxide (H2O2). The chemiluminescence efficiency of the sensor has been greatly enhanced by 6 times compared with that in the absence of nano-anatase. However, 2,4-D could greatly suppress the chemiluminescence enhancement of anatase nanoparticles probably by adsorbing and competitively reacting with the activated hydrogen peroxide on the anatase surface. The phenomenon has been used to detect 2,4-D by monitoring the quenching of the chemiluminescence of the system. The limit of detection of the chemiluminescence sensor system was estimated to be as low as 0.33 nmol/L. The simple and sensitive sensor reported herein exhibited an effective combination of traditional chemiluminescence with nano-anatase for sensitive detection, thus promoting the advances of chemiluminescence sensing on the basis of nanomaterials.