Photoelectrocatalytic oxidation of phenol on platinum-modified TiO2 nanotubes

Orudzhev, Farid; Gasanova, F. G.; Aliev, Z. M.; Исаев, А. Б.

doi:10.1134/s1995078012050102

Cited by 11 publications

(5 citation statements)

References 15 publications

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“…Further increase the temperature to 70 • C, the activity decreased since the electron-hole recombination rate increased. Various cocatalysts, such as Pd and Cu, have been sued as the cocatalyst of TiO 2 [49][50][51][52][53][54][55]. The cocatalyst can suppress electron-hole recombination rate and resulted in longer life time of electron and hole and higher photocatalytic activity.…”

Section: Photocatalytic Reactionmentioning

confidence: 99%

Effects of Reaction Temperature on the Photocatalytic Activity of TiO2 with Pd and Cu Cocatalysts

Chen

Hsu

2021

Catalysts

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The aim of this study was to investigate the effects of reaction temperature on the photocatalytic activity of TiO2 with Pd and Cu cocatalysts. N2 sorption, transmission electron microscopy and high-resolution transmission electron microscopy were used to characterize the specific surface area, pore volume, pore size, morphology and metal distribution of the catalysts. The photocatalytic destruction of methylene blue under UV light irradiation was used to test its activity. The concentration of methylene blue in water was determined by UV-vis spectrophotometer. Pd/TiO2 catalyst was more active than Cu/TiO2 and TiO2. At 0–50 °C reaction temperature, the activity of TiO2 and Pd/TiO2 increased with an increase of reaction temperature. When the temperature was as high as 70 °C, the reaction rate of TiO2 drop slightly and Pd/TiO2 became less effective. In contrast, Cu/TiO2 was more active at room temperature than the other temperatures. The results indicate that the photocatalytic activity of the catalyst is influenced by the reaction temperature and the type of cocatalyst. When the reaction temperature is higher than 70 °C, the recombination of charge carriers will increase. The temperature range of 50–80 °C is regarded as the ideal temperature for effective photolysis of organic matter. The effects of reaction temperature mainly influence quantum effect, i.e., electron-hole separation and recombination.

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Section: Photocatalytic Reactionmentioning

confidence: 99%

Effects of Reaction Temperature on the Photocatalytic Activity of TiO2 with Pd and Cu Cocatalysts

Chen

Hsu

2021

Catalysts

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“…The photocatalytic activities of prepared TiO 2 nanotubes were determined by studying the degradation of an aqueous solution of phenol in a teflon cylindrical vessel photocatalytic reactor with volume 200 ml described in more detail in our previous work [30,31]. The oxygen pressure created by feeding from a high pressure cylinder to the cell.…”

Section: Photocatalytic Activitymentioning

confidence: 99%

Effect of TiO2 Nanotube Calcination Temperature and Oxygen Pressure to Photocatalytic Oxidation of Phenol

Исаев

Shabanov

Orudzhev

2018

Materials Research Foundations

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The influences of oxygen pressure and TiO 2 nanotubes calcination temperature on the photocatalytic degradation phenol were investigated. According to experimental results the dissolved oxygen at different pressure and TiO 2 calcination temperature was a determining parameter for the photocatalytic degradation of phenol. The calcination temperature of TiO 2 nanotubes affects the anatase phase, crystallite size, surface area and pore volume of TiO 2 powder and respectively to rate of photodegradation of phenol. The kinetics of photocatalytic degradation of phenol in presence of TiO 2 nanotubes at high pressure of oxygen is investigated. The initial rate of photodegradation phenol were increased from 0.21 to 0.52 mg•l -1 •min -1 when the initial oxygen pressure was increased from 0.1 to 0.6 MPa and have linear relationship between phenol oxidation rate and the oxygen pressure. The dissolved oxygen acted as an electron scavenger with formation reactive oxygen species such as the superoxide ion and the hydroxyl radical.

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“…A quantity of compounds is used as photocatalysts, among which TiO 2 has received tremendous attention [10][11][12][13][14][15][16]. However, TiO 2 -based photocatalysts are predominantly activated by irradiation of ultraviolet light only [17].…”

Section: Introductionmentioning

confidence: 99%

Selectivity Control of CO2 Reduction over Pt/g-C3N4 Photocatalysts under Visible Light

et al. 2023

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Photocatalysts based on g-C3N4 have been investigated in the CO2 reduction reaction under visible light irradiation (λ = 397, 427, 452 nm). Photocatalysts were prepared by melamine calcination at 500–600 °C with further platinum deposition (0.1–1.0 wt.%). The effect of the preparation conditions of g-C3N4 and the method of platinum deposition on the physicochemical properties and activity of photocatalysts was studied. The photocatalysts were investigated by X-ray photoelectron spectroscopy, X-ray absorption spectroscopy, X-ray diffraction, high resolution transmission electron microscopy, UV-Vis spectroscopy, and low temperature nitrogen adsorption techniques. It has been found that the efficiency of CO2 reduction is governed by the surface area of g-C3N4 and the presence of platinum in the metallic state, while the optimal content of platinum is 0.5 wt. %. The highest rate of CO2 reduction achieved over Pt/g-C3N4 photocatalyst is 13.2 µmol h−1 g−1 (397 nm), which exceeds the activity of pristine g-C3N4 by 7 times. The most active photocatalysts was prepared by calcining melamine in air at 600 °C, followed by modification with platinum (0.5 wt.%).

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Photoelectrocatalytic oxidation of phenol on platinum-modified TiO2 nanotubes

Cited by 11 publications

References 15 publications

Effects of Reaction Temperature on the Photocatalytic Activity of TiO2 with Pd and Cu Cocatalysts

Effects of Reaction Temperature on the Photocatalytic Activity of TiO2 with Pd and Cu Cocatalysts

Effect of TiO2 Nanotube Calcination Temperature and Oxygen Pressure to Photocatalytic Oxidation of Phenol

Selectivity Control of CO2 Reduction over Pt/g-C3N4 Photocatalysts under Visible Light

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