Rapid Spectrophotometric Detection of Hydrogen Peroxide Using (Au)core(Ag)shell Nanoparticle

Chem. J. Chinese Universities

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Rapid Spectrophotometric Detection of Hydrogen Peroxide Using (Au)_core(Ag)_shell Nanoparticle

JIANG Zhi-Liang^1,2*, LI Ji-Shun², ZHANG Nan-Nan², LIANG Ai-Hui², LIU Qing-Ye¹, HUANG Zhi¹

1. Department of Envroinmental Science, Key Laboratory of Environmental Engineering and Protection Evaluation of Guangxi Provinece, Guangxi Normal University, Guilin 541004, China;
2. Department of Material and Chemical Engineering, Guilin University of Technology, Guilin 541001, China

Received:2008-03-13 Revised:1900-01-01 Online:2008-10-10 Published:2008-10-10
Contact: JIANG Zhi-Liang

Abstract

Abstract: Using 10 nm nanogold as seeds, the (Au)_core(Ag)_shell nanoparticles were prepared in the presence of AgNO₃ and trisodium citrate dehydrate, and they were purified by high-speed centrifugation to remove the excess trisodium citrate. The absorption peak of the purified (Au)_core(Ag)_shell nanoparticles is at 393 nm. In pH=4.4 HAc-NaAc buffer solution, hydroxyl radical produced from Fenton reaction oxidized the outer silver layer of the nanoparticles to form Ag⁺, and resulted in decreasing of the absorbance value at 393 nm. The concentration of H₂O₂ in the range of 6.58—421.1 μmol/L was linear to the decreased absorbance at 393 nm(ΔA_{393 nm}). Its regression equation was ΔA_{393 nm}=0.00111c+0.0210, and the correlation coefficient was 0.9908, with a detection limit of 1.73 μmol/L. This method was applied to the detection of H₂O₂ in wastewater, with satisfactory results.

Key words: (Au)_core(Ag)_shell nanoparticle, Centrifugation, Fenton reaction, Hydrogen peroxide, Spectrophotometry

CLC Number:

O657.32

TrendMD:

JIANG Zhi-Liang^1,2*, LI Ji-Shun², ZHANG Nan-Nan², LIANG Ai-Hui², LIU Qing-Ye¹, HUANG Zhi¹. Rapid Spectrophotometric Detection of Hydrogen Peroxide Using (Au)_core(Ag)_shell Nanoparticle[J]. Chem. J. Chinese Universities, doi: .

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Rapid Spectrophotometric Detection of Hydrogen Peroxide Using (Au)_core(Ag)_shell Nanoparticle

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