Photoelectrocatalytic decomposition of gaseous isopropanol in a polymer electrolyte photoreactor

Hou, Wei-Ming; Ku, Young

doi:10.1007/s10008-012-1921-2

Cited by 7 publications

(6 citation statements)

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“…However, the promotion of increasing UV intensity on IPA decomposition was decreased for experiments conducted with light intensity higher than 25.2 mW/cm 2 because excessive light energy can not be absorbed by the limited surface of TiO 2 particles, similar to the results reported previously for benzene decomposition by photocatalytic process . Hou and Ku, Aerosol and Air Quality Research, 13: 1570-1581, 2013 Electrical current density of the photoanode depicted in Fig. 8(b) was found to be decreased linearly with increasing UV light intensity, indicating the decrease of membrane conductivity of Nafion possibly due to the photocatalytic decomposition of water molecules.…”

Section: Effect Of Uv Light Intensity On Gaseous Photoelectrocatalytimentioning

confidence: 94%

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Enhanced Photocatalytic Decomposition of Gaseous Isopropyl Alcohol in a Polymer Electrolyte Cell

Hou

2013

Aerosol Air Qual. Res.

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Electrochemical enhancement of the photocatalytic decomposition of isopropyl alcohol in gas phase was carried out in a polymer electrolyte cell. An external electrical field was created in the gas-phase photocatalytic reaction due to the presence of solid electrolyte. The effects of bias potential, relative humidity, initial isopropyl alcohol concentration and UV light intensities were investigated for the photoelectrocatalytic process. Photoelectrocatalytic decomposition of isopropyl alcohol was observed to be less sensitive to humidity for experiments that applied a bias potential higher than 2.5 V. Electrical current densities of photoanode were highly correlated to the variations in bias potential, relative humidity level and UV light intensity, although independent of inlet isopropyl alcohol concentrations. Humidity had an ambiguous effect on the membrane conductivity of polymer electrolyte and photocatalytic decomposition rate of isopropyl alcohol with the application of bias potential. The experimental results also showed that the energy consumed in the photoelectrocatalytic process was much less than that needed by the photocatalytic process to achieve a similar level of isopropyl alcohol decomposition.

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Section: Effect Of Uv Light Intensity On Gaseous Photoelectrocatalytimentioning

confidence: 94%

“…The similar fabrication procedure for photoanode was published in Ref. (Hou and Ku, 2013). Crystal phase and distribution of TiO 2 particles coated on the photoanode was characterized by an X-ray diffractometer (XRD, D2 Phaser, Bruker) and field-emission scanning electron microscopy (FESEM, JSM-6500F, JEOL), respectively.…”

Section: Methodsmentioning

confidence: 99%

Enhanced Photocatalytic Decomposition of Gaseous Isopropyl Alcohol in a Polymer Electrolyte Cell

Hou

2013

Aerosol Air Qual. Res.

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“…Because the pollutant gas has no water vapor, the holes and the O 2 -produced from the adsorbed oxygen reduced by electrons directly oxidizes the acetone vapor into CO 2 and H 2 O. In order to facilitate the photoelectrochemical process in the gas phase, the proton exchange membrane (PEM)-based reactor was fabricated to decompose the gaseous isopropanol [157,158]. During this process, not only is the pollutant degraded on the photoanode, but hydrogen is also generated on the cathode.…”

Section: Page 26 Of 61mentioning

confidence: 99%

Synergetic photoelectrocatalytic reactors for environmental remediation: A review

Meng

Zhang

2015

Journal of Photochemistry and Photobiology C: Photochemistry Re

144

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“…Solid electrolytes should be used to assist the application of bias potential for gas-phase PEC reactions. However, the efficiency could only be improved with a very high bias from 4 to 82.5 V , in gas-phase reactions, thus requiring a special potentiostat or voltage booster. This PEC could only be driven for applications in gas-phase reactions due to its high energy consumption and low safety level.…”

Section: Introductionmentioning

confidence: 99%

Gas-Phase Photoelectrocatalytic Oxidation of NO via TiO₂ Nanorod Array/FTO Photoanodes

Dai

Tao

Zou

et al. 2020

Environ. Sci. Technol.

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Most photoelectrocatalytic (PEC) reactions are performed in the liquid phase for convenient electron transfer in an electrolyte solution. Herein, a novel PEC reactor involving a tandem combination of TiO2 nanorod array/fluorine-doped tin oxide (TiO2-NR/FTO) working electrodes and an electrochemical auxiliary cell was constructed to drive the highly efficient PEC oxidation of indoor gas (NO x ). With the aid of a low bias voltage (0.3 V), the as-formed PEC reactor exhibited an 80% removal rate for oxidizing NO (500 ppb) under light irradiation, which is much higher than that of the traditional photocatalytic (PC) process. Upon being irradiated by light, the photogenerated electrons are quickly separated from the holes and transferred to the counter electrode (Pt) owing to the applied bias voltage, leaving photogenerated holes in the TiO2-NR/FTO electrode for oxidizing NO molecules. Moreover, both dry and humid NO could be effectively removed by the tandem TiO2-NR/FTO-based gas-phase PEC reactor, indicating that the NO molecules could also be directly oxidized by photogenerated holes in addition to hydroxyl radicals. The presence of trace amounts of water could promote the PEC oxidation of NO owing to the formation of hydroxyl radicals induced by reactions between the water and holes, which could further oxidize NO. This PEC reactor offers an energy-saving, environmentally friendly, and efficient route to treat air polluted with low concentrations of gases (NO x and SO x ).

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Photoelectrocatalytic decomposition of gaseous isopropanol in a polymer electrolyte photoreactor

Cited by 7 publications

References 21 publications

Enhanced Photocatalytic Decomposition of Gaseous Isopropyl Alcohol in a Polymer Electrolyte Cell

Enhanced Photocatalytic Decomposition of Gaseous Isopropyl Alcohol in a Polymer Electrolyte Cell

Synergetic photoelectrocatalytic reactors for environmental remediation: A review

Gas-Phase Photoelectrocatalytic Oxidation of NO via TiO₂ Nanorod Array/FTO Photoanodes

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Photoelectrocatalytic decomposition of gaseous isopropanol in a polymer electrolyte photoreactor

Cited by 7 publications

References 21 publications

Enhanced Photocatalytic Decomposition of Gaseous Isopropyl Alcohol in a Polymer Electrolyte Cell

Enhanced Photocatalytic Decomposition of Gaseous Isopropyl Alcohol in a Polymer Electrolyte Cell

Synergetic photoelectrocatalytic reactors for environmental remediation: A review

Gas-Phase Photoelectrocatalytic Oxidation of NO via TiO2 Nanorod Array/FTO Photoanodes

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Product

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Gas-Phase Photoelectrocatalytic Oxidation of NO via TiO₂ Nanorod Array/FTO Photoanodes