Process monitoring of photocatalytic degradation of 2,4-dinitrotoluene by Au-decorated Fe3O4@TiO2 nanoparticles: surface-enhanced Raman scattering method

Sila Jin; Eungyeong Park; Shuang Guo; Yeonju Park; Jongmin Park; Hyuk Sang Yoo; Ju Hyun Park; Lei Chen; Young Mee Jung

doi:10.1016/j.saa.2022.121155

Process monitoring of photocatalytic degradation of 2,4-dinitrotoluene by Au-decorated Fe₃O₄@TiO₂ nanoparticles: surface-enhanced Raman scattering method

Spectrochim Acta A Mol Biomol Spectrosc. 2022 Jul 5:275:121155. doi: 10.1016/j.saa.2022.121155. Epub 2022 Mar 14.

Authors

Sila Jin¹, Eungyeong Park¹, Shuang Guo¹, Yeonju Park², Jongmin Park³, Hyuk Sang Yoo⁴, Ju Hyun Park⁵, Lei Chen⁶, Young Mee Jung⁷

Affiliations

¹ Department of Chemistry, Institute for Molecular Science and Fusion Technology, Kangwon National University, Chuncheon 24341, Korea.
² Kangwon Radiation Convergence Research Support Center, Kangwon National University, Chuncheon 24341, Korea.
³ Department of Chemistry, Institute for Molecular Science and Fusion Technology, Kangwon National University, Chuncheon 24341, Korea; Kangwon Institute of Inclusive Technology (KIIT), Kangwon National University, Chuncheon 24341, Korea.
⁴ Kangwon Radiation Convergence Research Support Center, Kangwon National University, Chuncheon 24341, Korea; Department of Biomedical Science, Kangwon National University, Chuncheon 24341, Korea; Kangwon Institute of Inclusive Technology (KIIT), Kangwon National University, Chuncheon 24341, Korea.
⁵ Department of Biomedical Science, Kangwon National University, Chuncheon 24341, Korea; Kangwon Institute of Inclusive Technology (KIIT), Kangwon National University, Chuncheon 24341, Korea.
⁶ Department of Chemistry, Institute for Molecular Science and Fusion Technology, Kangwon National University, Chuncheon 24341, Korea; Key Laboratory of Preparation and Applications of Environmental Friendly Materials (Jilin Normal University), Ministry of Education, Changchun 130103, PR China. Electronic address: chenlei@jlnu.edu.cn.
⁷ Department of Chemistry, Institute for Molecular Science and Fusion Technology, Kangwon National University, Chuncheon 24341, Korea; Kangwon Radiation Convergence Research Support Center, Kangwon National University, Chuncheon 24341, Korea; Kangwon Institute of Inclusive Technology (KIIT), Kangwon National University, Chuncheon 24341, Korea. Electronic address: ymjung@kangwon.ac.kr.

PMID: 35313176
DOI: 10.1016/j.saa.2022.121155

Abstract

Recently, the degradation and detection of 2,4-dinitrotoluene (2,4-DNT) capable of producing 2,4,6-trinitrotoluene (TNT) for environmental and human health risks have been developed. We prepared photoresponsive Au-decorated Fe₃O₄@TiO₂ nanoparticles (Fe₃O₄@TiO₂-Au NPs) under sunlight simulated Xe lamp irradiation. The photodegradation process of 2,4-DNT by Fe₃O₄@TiO₂-Au NPs was successfully monitored by surface-enhanced Raman scattering (SERS). Since SERS monitoring shows intrinsic information about the molecular structure, it was possible to predict the photodegradation of 2,4-DNT. The 2,4-DNT photodegradation mechanism based on two-dimensional correlation spectroscopy (2D-COS), which provides very beneficial information for a deeper understanding of systems, has been identified. We confirmed that Fe₃O₄@TiO₂-Au NPs can be widely used in organic pollutant degradation under sunlight. Furthermore, the combination of SERS based process monitoring and 2D-COS can be a convincing analytical technique for photodegradation studies of organic pollutants.

Keywords: 2,4-DNT degradation; 2D-COS; Fe(3)O(4)@TiO(2)-Au; SERS monitoring; Sunlight-induced photocatalyst.

MeSH terms

Dinitrobenzenes
Humans
Nanoparticles*
Spectrum Analysis, Raman*
Titanium / chemistry

Substances

Dinitrobenzenes
titanium dioxide
2,4-dinitrotoluene
Titanium