Effect of Humidity on the Gas Phase Photocatalytic Degradation of Trichloroethylene over the Pretreated TiO&lt;sub&gt;2&lt;/sub&gt; Thin Films

Kim, Jong Soon; Itoh, Kiminori; Murabayashi, Masayuki

doi:10.5796/kogyobutsurikagaku.65.966

Cited by 4 publications

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“…The present results obtained with a dry mixture of O 2 and N 2 do not contradict this interpretation. Indeed, it can be foreseen that the approach of the pollutant molecules to TiO 2 across the near-surface water layers could also play an important role in the treatment of air if the relative humidity is high, in line with the reported influence of humidity. ,− …”

Section: Resultsmentioning

confidence: 79%

“…Indeed, it can be foreseen that the approach of the pollutant molecules to TiO 2 across the near-surface water layers could also play an important role in the treatment of air if the relative humidity is high, in line with the reported influence of humidity. 12,[24][25][26][27][28] Photocatalytic Mineralization of Methanol by TiO 2 Powders. The procedure was different from that corresponding to Figure 1.…”

Section: Resultsmentioning

confidence: 99%

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Photocatalytic Treatment of Air: Comparison of Various TiO₂, Coating Methods, and Supports Using Methanol or n-Octane as Test Pollutant

Taranto

Frochot

Pichat

2009

Ind. Eng. Chem. Res.

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We have investigated the effects of the TiO 2 type and coating method, two important factors for TiO 2 -based photocatalytic purification/deodorization of air. First, two TiO 2 powders (PC500 and 105) designed by Millennium Chemicals for photocatalysis were compared with Degussa P25 TiO 2 , a common reference, for removing methanol or n-octane in a flowing dry mixture of O 2 (20 v/v %) and N 2 . Under the conditions used, the differences were very small. For methanol mineralization, PC500 (the highest surface area sample) was, however, more efficient, which is attributed to increased adsorption of methanal (main intermediate product). Second, PC500 and 105 coated on a fibrous tissue (Ahlstrom) using a silica binder were tested for removing methanol in the O 2 + N 2 mixture in a batch reactor. Increasing the SiO 2 wt % from 20 to 50, at equal mass of TiO 2 + SiO 2 , was detrimental but not markedly, and the interest of using PC500 preferentially to PC105 to mineralize methanol was confirmed. Third, experimental design was used to optimize the thickness and quality of P25 coatings on quartz (or similarly on aluminum), which were obtained by several dipping/drying steps followed by a final calcination. For the optimized coatings, methanol or n-octane disappearance (batch reactor) and mineralization reached a maximum for three dip-coating steps (ca. 0.6 µm coating thickness, likely corresponding to UV light maximum penetration depth).

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Section: Resultsmentioning

confidence: 79%

Section: Resultsmentioning

confidence: 99%

Photocatalytic Treatment of Air: Comparison of Various TiO₂, Coating Methods, and Supports Using Methanol or n-Octane as Test Pollutant

Taranto

Frochot

Pichat

2009

Ind. Eng. Chem. Res.

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Photocatalytic Activity of TiO2 Films Preserved under Different Conditions: The Gas-Phase Photocatalytic Degradation Reaction of Trichloroethylene

Kim

Joo

Lee

et al. 2000

Journal of Catalysis

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Pretreatment of the photocatalyst and the photocatalytic degradation of trichloroethylene in the gas-phase

et al. 1999

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Effect of Humidity on the Gas Phase Photocatalytic Degradation of Trichloroethylene over the Pretreated TiO<sub>2</sub> Thin Films

Cited by 4 publications

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Photocatalytic Treatment of Air: Comparison of Various TiO₂, Coating Methods, and Supports Using Methanol or n-Octane as Test Pollutant

Photocatalytic Treatment of Air: Comparison of Various TiO₂, Coating Methods, and Supports Using Methanol or n-Octane as Test Pollutant

Photocatalytic Activity of TiO2 Films Preserved under Different Conditions: The Gas-Phase Photocatalytic Degradation Reaction of Trichloroethylene

Pretreatment of the photocatalyst and the photocatalytic degradation of trichloroethylene in the gas-phase

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Effect of Humidity on the Gas Phase Photocatalytic Degradation of Trichloroethylene over the Pretreated TiO<sub>2</sub> Thin Films

Cited by 4 publications

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Photocatalytic Treatment of Air: Comparison of Various TiO2, Coating Methods, and Supports Using Methanol or n-Octane as Test Pollutant

Photocatalytic Treatment of Air: Comparison of Various TiO2, Coating Methods, and Supports Using Methanol or n-Octane as Test Pollutant

Photocatalytic Activity of TiO2 Films Preserved under Different Conditions: The Gas-Phase Photocatalytic Degradation Reaction of Trichloroethylene

Pretreatment of the photocatalyst and the photocatalytic degradation of trichloroethylene in the gas-phase

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Product

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Photocatalytic Treatment of Air: Comparison of Various TiO₂, Coating Methods, and Supports Using Methanol or n-Octane as Test Pollutant

Photocatalytic Treatment of Air: Comparison of Various TiO₂, Coating Methods, and Supports Using Methanol or n-Octane as Test Pollutant