Luminol chemiluminescence catalysed by colloidal platinum nanoparticles

Luminescence - Tập 22 Số 2 - Trang 77-87 - 2007
Shaonan Xu1, Hua Cui1
1Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, People’s Republic of China

Tóm tắt

AbstractPlatinum colloids prepared by the reduction of hexachloroplatinic acid with citrate in the presence of different stabilizers were found to enhance the chemiluminescence (CL) of the luminol–H2O2 system, and the most intensive CL signals were obtained with citrate‐protected Pt colloids synthesized with citrate as both a reductant and a stabilizer. Light emission was intense and reproducible. Transmission electron microscopy and X‐ray photoelectron spectroscopy studies were conducted before and after the CL reaction to investigate the possible CL enhancement mechanism. It is suggested that this CL enhancement is attributed to the catalysis of platinum nanoparticles, which could accelerate the electron‐transfer process and facilitate the CL radical generation in aqueous solution. The effects of Pt colloids prepared by the hydroborate reduction were also investigated. The application of the luminol–H2O2–Pt colloids system was exploited for the determination of compounds such as uric acid, ascorbic acid, phenols and amino acids. Copyright © 2006 John Wiley & Sons, Ltd.

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Luminescence

Tập 22 Số 2

77-87

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