Synthesis and Characterization of Photoactive S-Tio2 from Tioso4 Precursor Using an Integrated Sol-Gel and Solvothermal Method at Low Temperatures

Jerson Mosquera-Pretelt, María I. Mejía, Juan M. Marín

Resultado de la investigación: Contribución a una revistaArtículo

2 Citas (Scopus)

Resumen

© 2017. Photoactive S-titanium dioxides (S-TiO2) were synthesized from TiOSO4 as only Ti and S precursor using an integrated sol-gel and solvothermal method at low temperatures (200 °C - 250 °C). The effect of the synthesis conditions (molar ratios of water/TiOSO4 and solvent (ethanol)/TiOSO4 as well as temperature, < 250 °C) of the applied method in the properties and the photoactivity of the synthesized materials was evaluated through Box-Behnken experimental design. The prepared photocatalysts were characterized by X-ray diffraction (XRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), X-ray fluorescence (XRF), attenuated total reflectance - Fourier transform infrared spectroscopy (ATR-FTIR), ultraviolet - visible diffuse reflectance spectroscopy (UV/vis-DRS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), porosity and BET surface area analysis. The photocatalytic activities of the synthesized S-TiO2 materials were determined by the photodegradation of formic acid. Results indicated that the integrated sol-gel and solvothermal method at low temperatures led to obtain mesoporous, crystalline and photoactive S-TiO2 materials, crystallized as anatase phase with UV and visible light absorption for all synthesis conditions. All synthesized S-TiO2 materials showed high activity in formic acid photodegradation, which was associated on their degrees of crystallinity, particle sizes and sulfur contents, being higher in the materials synthesized with the temperature of 250 °C. Material synthesized with molar ratio water/TiOSO4 of 4.0, molar ratio ethanol/TiOSO4 of 15 and T = 250 °C, showed the highest photocatalytic activity, a crystallite size of 42.34 nm, surface area of 35.77 m2/g, sulfur content of 0.818 wt %, high UV and visible radiation absorption and band gap of 3.03.
Idioma originalInglés estadounidense
PublicaciónJournal of Advanced Oxidation Technologies
DOI
EstadoPublicada - 1 ene 2018

Huella dactilar

Sol-gels
formic acid
gels
ethyl alcohol
sulfur
synthesis
radiation absorption
reflectance
x rays
Photodegradation
electromagnetic absorption
Sulfur
titanium oxides
anatase
Temperature
water
boxes
crystallinity
Ethanol
Raman spectroscopy

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title = "Synthesis and Characterization of Photoactive S-Tio2 from Tioso4 Precursor Using an Integrated Sol-Gel and Solvothermal Method at Low Temperatures",
abstract = "{\circledC} 2017. Photoactive S-titanium dioxides (S-TiO2) were synthesized from TiOSO4 as only Ti and S precursor using an integrated sol-gel and solvothermal method at low temperatures (200 °C - 250 °C). The effect of the synthesis conditions (molar ratios of water/TiOSO4 and solvent (ethanol)/TiOSO4 as well as temperature, < 250 °C) of the applied method in the properties and the photoactivity of the synthesized materials was evaluated through Box-Behnken experimental design. The prepared photocatalysts were characterized by X-ray diffraction (XRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), X-ray fluorescence (XRF), attenuated total reflectance - Fourier transform infrared spectroscopy (ATR-FTIR), ultraviolet - visible diffuse reflectance spectroscopy (UV/vis-DRS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), porosity and BET surface area analysis. The photocatalytic activities of the synthesized S-TiO2 materials were determined by the photodegradation of formic acid. Results indicated that the integrated sol-gel and solvothermal method at low temperatures led to obtain mesoporous, crystalline and photoactive S-TiO2 materials, crystallized as anatase phase with UV and visible light absorption for all synthesis conditions. All synthesized S-TiO2 materials showed high activity in formic acid photodegradation, which was associated on their degrees of crystallinity, particle sizes and sulfur contents, being higher in the materials synthesized with the temperature of 250 °C. Material synthesized with molar ratio water/TiOSO4 of 4.0, molar ratio ethanol/TiOSO4 of 15 and T = 250 °C, showed the highest photocatalytic activity, a crystallite size of 42.34 nm, surface area of 35.77 m2/g, sulfur content of 0.818 wt {\%}, high UV and visible radiation absorption and band gap of 3.03.",
author = "Jerson Mosquera-Pretelt and Mej{\'i}a, {Mar{\'i}a I.} and Mar{\'i}n, {Juan M.}",
year = "2018",
month = "1",
day = "1",
doi = "10.26802/jaots.2017.0008",
language = "American English",
journal = "Journal of Advanced Oxidation Technologies",
issn = "1203-8407",
publisher = "Walter de Gruyter GmbH",

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TY - JOUR

T1 - Synthesis and Characterization of Photoactive S-Tio2 from Tioso4 Precursor Using an Integrated Sol-Gel and Solvothermal Method at Low Temperatures

AU - Mosquera-Pretelt, Jerson

AU - Mejía, María I.

AU - Marín, Juan M.

PY - 2018/1/1

Y1 - 2018/1/1

N2 - © 2017. Photoactive S-titanium dioxides (S-TiO2) were synthesized from TiOSO4 as only Ti and S precursor using an integrated sol-gel and solvothermal method at low temperatures (200 °C - 250 °C). The effect of the synthesis conditions (molar ratios of water/TiOSO4 and solvent (ethanol)/TiOSO4 as well as temperature, < 250 °C) of the applied method in the properties and the photoactivity of the synthesized materials was evaluated through Box-Behnken experimental design. The prepared photocatalysts were characterized by X-ray diffraction (XRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), X-ray fluorescence (XRF), attenuated total reflectance - Fourier transform infrared spectroscopy (ATR-FTIR), ultraviolet - visible diffuse reflectance spectroscopy (UV/vis-DRS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), porosity and BET surface area analysis. The photocatalytic activities of the synthesized S-TiO2 materials were determined by the photodegradation of formic acid. Results indicated that the integrated sol-gel and solvothermal method at low temperatures led to obtain mesoporous, crystalline and photoactive S-TiO2 materials, crystallized as anatase phase with UV and visible light absorption for all synthesis conditions. All synthesized S-TiO2 materials showed high activity in formic acid photodegradation, which was associated on their degrees of crystallinity, particle sizes and sulfur contents, being higher in the materials synthesized with the temperature of 250 °C. Material synthesized with molar ratio water/TiOSO4 of 4.0, molar ratio ethanol/TiOSO4 of 15 and T = 250 °C, showed the highest photocatalytic activity, a crystallite size of 42.34 nm, surface area of 35.77 m2/g, sulfur content of 0.818 wt %, high UV and visible radiation absorption and band gap of 3.03.

AB - © 2017. Photoactive S-titanium dioxides (S-TiO2) were synthesized from TiOSO4 as only Ti and S precursor using an integrated sol-gel and solvothermal method at low temperatures (200 °C - 250 °C). The effect of the synthesis conditions (molar ratios of water/TiOSO4 and solvent (ethanol)/TiOSO4 as well as temperature, < 250 °C) of the applied method in the properties and the photoactivity of the synthesized materials was evaluated through Box-Behnken experimental design. The prepared photocatalysts were characterized by X-ray diffraction (XRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), X-ray fluorescence (XRF), attenuated total reflectance - Fourier transform infrared spectroscopy (ATR-FTIR), ultraviolet - visible diffuse reflectance spectroscopy (UV/vis-DRS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), porosity and BET surface area analysis. The photocatalytic activities of the synthesized S-TiO2 materials were determined by the photodegradation of formic acid. Results indicated that the integrated sol-gel and solvothermal method at low temperatures led to obtain mesoporous, crystalline and photoactive S-TiO2 materials, crystallized as anatase phase with UV and visible light absorption for all synthesis conditions. All synthesized S-TiO2 materials showed high activity in formic acid photodegradation, which was associated on their degrees of crystallinity, particle sizes and sulfur contents, being higher in the materials synthesized with the temperature of 250 °C. Material synthesized with molar ratio water/TiOSO4 of 4.0, molar ratio ethanol/TiOSO4 of 15 and T = 250 °C, showed the highest photocatalytic activity, a crystallite size of 42.34 nm, surface area of 35.77 m2/g, sulfur content of 0.818 wt %, high UV and visible radiation absorption and band gap of 3.03.

U2 - 10.26802/jaots.2017.0008

DO - 10.26802/jaots.2017.0008

M3 - Article

JO - Journal of Advanced Oxidation Technologies

JF - Journal of Advanced Oxidation Technologies

SN - 1203-8407

ER -