Dynamic reaction regulated surface-enhanced Raman scattering for detection of trace formaldehyde

Qi Liu; Xiaoliang Zeng; Yunfei Tian; Xiandeng Hou; Li Wu

doi:10.1016/j.talanta.2019.05.004

Dynamic reaction regulated surface-enhanced Raman scattering for detection of trace formaldehyde

Talanta. 2019 Sep 1:202:274-278. doi: 10.1016/j.talanta.2019.05.004. Epub 2019 May 2.

Authors

Qi Liu¹, Xiaoliang Zeng¹, Yunfei Tian¹, Xiandeng Hou², Li Wu³

Affiliations

¹ Analytical & Testing Centre, Sichuan University, Chengdu, Sichuan, 610064, China.
² Analytical & Testing Centre, Sichuan University, Chengdu, Sichuan, 610064, China; Key Laboratory of Green Chemistry & Technology of MOE, College of Chemistry, Sichuan University, Chengdu, Sichuan, 610064, China.
³ Analytical & Testing Centre, Sichuan University, Chengdu, Sichuan, 610064, China. Electronic address: wuli@scu.edu.cn.

PMID: 31171182
DOI: 10.1016/j.talanta.2019.05.004

Abstract

A simple and reliable method was developed by combining redox reaction with surface-enhanced Raman scattering (SERS) for the indirect detection of formaldehyde (FA). Silver nanoparticles (AgNPs) can be generated from the reaction between the silver ammonia solution containing silver nanoclusters (AgNCs@Tollens) and FA, which can improve the SERS signal of rhodamine 6G (R6G). The detection principle was based on the enhancement of the SERS signal of R6G caused by the increase in the intensity of localized surface plasmon resonance (LSPR) upon the reduction of AgNCs@Tollens by FA. This method exhibits high sensitivity and selectivity for the detection of FA with a linear range from 5 μM to 160 μM and a limit of detection (LOD) of 2.5 μM. The proposed method was successfully used for the detection of FA released from furniture panels with a recovery rate of 95-100%.

Keywords: Formaldehyde; Localized surface plasmon resonance; Silver nanoparticles; Surface-enhanced Raman scattering.