Photocatalytic Degradation of Gaseous Acetone by a Self-Prepared Nano-Sized Composite TiO₂/In₂O₃/SnO₂ Film Photocatalyst

Abstract:

The objective of this study is to decompose gaseous acetone ((CH₃)₂CO) by a self-prepared nano-sized composite TiO₂/In₂O₃/SnO₂ film photocatalyst that was prepared by a multi-target vacuum sputter operating at a vacuum pressure of 3 mtorr. The operating parameters investigated for the sputtering process included oxygen to argon ratio (O₂/Ar), sputtering temperature, substrate materials, substrate layers, and sputtering duration. The nano-sized composite TiO₂/In₂O₃/SnO₂ film photocatalyst was mainly composed of anatase with a few rutile. The surface roughness of the TiO₂/In₂O₃/SnO₂ film photocatalyst in terms of RMS ranged from 2.292 to 7.533 nm, while the thickness of the single- and double-layer film photocatalysts were 473.5 and 506.0 nm, respectively. Gaseous acetone was initially injected into and further degraded in a self-designed batch photocatalytic reactor containing the nano-sized composite TiO₂/In₂O₃/SnO₂ film photocatalyst. Experimental results indicated that the highest acetone degradation efficiency of 99.9% was obtained at 50°C and 1 atm with the incident of near-UV illuminated by a fluorescent black light lamp. Under the incidence of blue light (430-500 nm), the reaction rates of acetone decomposition were 2.353x10^-5 and 3.478x10^-5 μmole/cm²-sec for using single- and double-layer TiO₂/In₂O₃/SnO₂ film photocatalysts, respectively.

• Periodical: Advanced Materials Research (Volumes 287-290)
• Pages: 1581-1584
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.287-290.1581
• Online since: July 2011
• Authors: Chung Shin Yuan, Hsieh Hung Tsai, Jeng Fong Wu, Bo Cheng Guo, Chung Hsuang Hung
• Keywords: Nano-Sized Composite TiO₂/In₂O₃/SNO₂ Film Photocatalyst, Operating Parameters, Photocatalytic Degradation of Acetone, Sputtering Technology

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