期刊
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
卷 275, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2022.121155
关键词
Fe3O4@TiO2-Au; Sunlight-induced photocatalyst; 2,4-DNT degradation; SERS monitoring; 2D-COS
类别
资金
- National Research Foundation of Korea (NRF) - Korea government [NRF-2021R1A2C2004550, NRF-2020K2A9A2A06036299, NRF-2020R1A4A1016093]
- Korea Basic Science Institute (National Research Facilities and Equipment Center) - Ministry of Education [2020R1A6C101A195]
- Brain Pool program - Ministry of Science and ICT through the NRF [2021H1D3A2A01081031]
- National Research Foundation of Korea [2021H1D3A2A01081031] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
A method for the degradation and detection of 2,4-dinitrotoluene (2,4-DNT) capable of producing 2,4,6-trinitrotoluene (TNT) under sunlight has been developed. The photodegradation process of 2,4-DNT by Fe3O4@TiO2-Au nanoparticles (Fe3O4@TiO2-Au NPs) was successfully monitored by surface-enhanced Raman scattering (SERS). The combination of SERS monitoring and two-dimensional correlation spectroscopy (2D-COS) provides valuable information for understanding the photodegradation mechanism of 2,4-DNT and demonstrates the wide applicability of Fe3O4@TiO2-Au NPs in organic pollutant degradation under sunlight.
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. (C) 2022 Elsevier B.V. All rights reserved.
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