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


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.

SUBMITTER: Zhu T 

PROVIDER: S-EPMC7179449 | biostudies-literature | 2020 Mar

REPOSITORIES: biostudies-literature

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Flexible and Reusable Ag Coated TiO<sub>2</sub> Nanotube Arrays for Highly Sensitive SERS Detection of Formaldehyde.

Zhu Tong T   Wang Hang H   Zang Libin L   Jin Sila S   Guo Shuang S   Park Eungyeong E   Mao Zhu Z   Jung Young Mee YM  

Molecules (Basel, Switzerland) 20200306 5


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 TiO<sub>2</sub> nanotube array (TNA) material, such as an SERS substrate, which can be used as both a sensin  ...[more]

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