Flexible and Reusable Ag Coated TiO2 Nanotube Arrays for Highly Sensitive SERS Detection of Formaldehyde

Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry
Tong ZhuYoung Mee Jung

Abstract

Quantitative analysis of formaldehyde (HCHO, FA), especially at low levels, in various environmental media is of great importance for assessing related environmental and human health risks. A highly efficient and convenient FA detection method based on surface-enhanced Raman spectroscopy (SERS) technology has been developed. This SERS-based method employs a reusable and soft silver-coated TiO2 nanotube array (TNA) material, such as an SERS substrate, which can be used as both a sensing platform and a degradation platform. The Ag-coated TNA exhibits superior detection sensitivity with high reproducibility and stability compared with other SERS substrates. The detection of FA is achieved using the well-known redox reaction of FA with 4-amino-3-hydrazino-5-mercapto-1,2,4-triazole (AHMT) at room temperature. The limit of detection (LOD) for FA is 1.21 × 10-7 M. In addition, the stable catalytic performance of the array allows the degradation and cleaning of the AHMT-FA products adsorbed on the array surface under ultraviolet irradiation, making this material recyclable. This SERS platform displays a real-time monitoring platform that combines the detection and degradation of FA.

References

Jan 14, 2010·Chemical Reviews·Tunga SalthammerRainer Marutzky
Jun 4, 2011·ACS Applied Materials & Interfaces·Godhuli SinhaIvano Alessandri
Apr 14, 2017·Physical Chemistry Chemical Physics : PCCP·Xin JiangBing Zhao
Aug 8, 2017·Nature Materials·John R Lombardi
Aug 14, 2019·Langmuir : the ACS Journal of Surfaces and Colloids·Yinong WangJinzhang Liu
Dec 10, 2019·ACS Omega·Bo YangYoung Mee Jung
Feb 14, 2019·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Wei SongXiaofeng Lu

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Citations

Oct 29, 2020·ACS Applied Materials & Interfaces·Nicolas FilippinAna Borrás

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Methods Mentioned

BETA
Raman spectroscopy
light scattering
scanning electron microscopy
surface plasmon resonance
X-ray

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