Effect of chopping (IMAGE)

National Institutes of Natural Sciences

Effect of chopping

Caption

Typical time profiles of the net temperature of the Pt/Ga2O3 photocatalyst particles subjected to (red line) continuous UV irradiation (∼90 mW cm–2) and (blue line) periodic UV irradiation with ∼5 Hz modulation at a partial pressure of methane gas (PCH4) of 30 kPa and a partial pressure of water vapor (PH2O) of 2 kPa. Inset: Schematic of the continuous and periodic UV irradiation. During periodic UV irradiation, excitation light irradiation (ON) and nonirradiation (OFF) are periodically repeated by an optical chopper; this significantly suppresses the increase in the instantaneous temperature of the sample.

Credit

Hiromasa Sato, Toshiki Sugimoto

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License

CC BY

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