Journal
CATALYSTS
Volume 9, Issue 5, Pages -Publisher
MDPI
DOI: 10.3390/catal9050449
Keywords
gallium oxide (Ga2O3); reduced graphene oxide (rGO); 2-butanone; volatile organic compounds (VOCs); photocatalytic oxidation (PCO); hydrothermal process; ultraviolet C (UVC) irradiation
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Funding
- National Research Foundation of Korea (NRF) through the Basic Science Research Program [2017R1A2B4012278]
- Ministry of Science, ICT and Future Planning, through the Global Frontier Project [CASE-2011-0031638]
- National Research Foundation of Korea [2017R1A2B4012278] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Hybrid nanostructures made of gallium oxide (Ga2O3) and reduced graphene oxide (rGO) are synthesized using a facile hydrothermal process method, where the Ga2O3 nanostructures are well dispersed on the rGO surface. The formed Ga2O3-rGO hybrids are characterized via Field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), a diffuse reflectance Ultraviolet-visible-near infrared (UV-Vis-NIR) spectrophotometer, Brunauer-Emmett-Teller (BET), and photoluminescence (PL). Gas chromatography mass spectrometry (GC-MS) was used for analyzing volatile organic compounds (VOCs). The photocatalytic activity of the hybrid nanostructures is evaluated via the degradation of the 2-butanone, representing the VOCs under 254-nm radiation in the atmosphere. That activity is then compared to that of the Ga2O3 and commercial TiO2-P25. The Ga2O3-rGO hybrid shows enhanced photocatalytic degradation of 2-butanone compared to Ga2O3 and TiO2-P25, which is attributed to the enhanced specific surface area. The results indicate that the Ga2O3-rGO hybrid could be a promising method of enhancing photocatalytic activity and thereby effectively degrading VOCs, including the 2-butanone.
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