Cr modified TiO 2-loaded MCM-41 catalysts for UV-light driven photodegradation of diethyl sulfide and ethanol

P. A. Kolinko; P. G. Smirniotis; D. V. Kozlov; A. V. Vorontsov

doi:10.1016/j.jphotochem.2012.01.013

Cr modified TiO ₂-loaded MCM-41 catalysts for UV-light driven photodegradation of diethyl sulfide and ethanol

P. A. Kolinko, P. G. Smirniotis, D. V. Kozlov, A. V. Vorontsov

Research output: Contribution to journal › Article › peer-review

14 Scopus citations

Abstract

Gas-phase photocatalytic oxidation (PCO) and adsorption of diethyl sulfide and ethanol in a batch reactor using Cr-modified TiO ₂-loaded MCM-41 silica and commercial TiO ₂ as photocatalysts were studied with in situ FTIR method. Mesoporous molecular sieves MCM-41 modified with Cr were synthesized by hydrothermal method; Si:Cr atomic ratio was 80:1 or 20:1. Final deposition of 25% TiO ₂ was conducted by sol-gel method using titanium isopropoxide as a precursor. Adsorption measurements in a static reactor were used to estimate the Langmuir isotherm parameters (monolayer capacity and adsorption constant). Photooxidation experiments under UV irradiation demonstrated that TiO ₂ loading on Cr-MCM-41 improve its activity in diethyl sulfide removal but decelerated the CO ₂ formation. On the contrary, the rate of ethanol oxidation increased strongly as a result of TiO ₂ loading and the highest activity was observed for 25% TiO ₂/MCM-41 photocatalyst without chromium. Sulfate species were detected on the TiO ₂ surface after complete diethyl sulfide oxidation. Water and CO ₂ were identified as the final products whereas acetaldehyde and CO were identified as by-products of ethanol photocatalytic oxidation. Visible light activity was not detected for TiO ₂/MCM-41 and TiO ₂/Cr-MCM-41 photocatalysts in oxidation of gas phase diethyl sulfide and ethanol.

Original language	English
Pages (from-to)	1-7
Number of pages	7
Journal	Journal of Photochemistry and Photobiology A: Chemistry
Volume	232
DOIs	https://doi.org/10.1016/j.jphotochem.2012.01.013
State	Published - 15 Mar 2012
Externally published	Yes

Keywords

CWA
Diethyl sulfide
Ethanol
MCM
Photocatalytic oxidation
Titanium dioxide
Transition metal doping
Visible light

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10.1016/j.jphotochem.2012.01.013

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title = "Cr modified TiO 2-loaded MCM-41 catalysts for UV-light driven photodegradation of diethyl sulfide and ethanol",

abstract = "Gas-phase photocatalytic oxidation (PCO) and adsorption of diethyl sulfide and ethanol in a batch reactor using Cr-modified TiO 2-loaded MCM-41 silica and commercial TiO 2 as photocatalysts were studied with in situ FTIR method. Mesoporous molecular sieves MCM-41 modified with Cr were synthesized by hydrothermal method; Si:Cr atomic ratio was 80:1 or 20:1. Final deposition of 25% TiO 2 was conducted by sol-gel method using titanium isopropoxide as a precursor. Adsorption measurements in a static reactor were used to estimate the Langmuir isotherm parameters (monolayer capacity and adsorption constant). Photooxidation experiments under UV irradiation demonstrated that TiO 2 loading on Cr-MCM-41 improve its activity in diethyl sulfide removal but decelerated the CO 2 formation. On the contrary, the rate of ethanol oxidation increased strongly as a result of TiO 2 loading and the highest activity was observed for 25% TiO 2/MCM-41 photocatalyst without chromium. Sulfate species were detected on the TiO 2 surface after complete diethyl sulfide oxidation. Water and CO 2 were identified as the final products whereas acetaldehyde and CO were identified as by-products of ethanol photocatalytic oxidation. Visible light activity was not detected for TiO 2/MCM-41 and TiO 2/Cr-MCM-41 photocatalysts in oxidation of gas phase diethyl sulfide and ethanol.",

keywords = "CWA, Diethyl sulfide, Ethanol, MCM, Photocatalytic oxidation, Titanium dioxide, Transition metal doping, Visible light",

author = "Kolinko, {P. A.} and Smirniotis, {P. G.} and Kozlov, {D. V.} and Vorontsov, {A. V.}",

note = "Funding Information: The support of the Ministry of Education and Science of Russia via contract 16.513.11.3091, SB RAS Integration projects 70 and 36, Presidium RAS grant 27.56, NATO SfP-981461 project as well as the Federal Special Program “Scientific and Educational Cadres of Innovative Russia” (2009–2013 years) via contract P1360, and President RF grant NSh-524.2012.3 is gratefully acknowledged.",

year = "2012",

month = mar,

day = "15",

doi = "10.1016/j.jphotochem.2012.01.013",

language = "אנגלית",

volume = "232",

pages = "1--7",

journal = "Journal of Photochemistry and Photobiology A: Chemistry",

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TY - JOUR

T1 - Cr modified TiO 2-loaded MCM-41 catalysts for UV-light driven photodegradation of diethyl sulfide and ethanol

AU - Kolinko, P. A.

AU - Smirniotis, P. G.

AU - Kozlov, D. V.

AU - Vorontsov, A. V.

N1 - Funding Information: The support of the Ministry of Education and Science of Russia via contract 16.513.11.3091, SB RAS Integration projects 70 and 36, Presidium RAS grant 27.56, NATO SfP-981461 project as well as the Federal Special Program “Scientific and Educational Cadres of Innovative Russia” (2009–2013 years) via contract P1360, and President RF grant NSh-524.2012.3 is gratefully acknowledged.

PY - 2012/3/15

Y1 - 2012/3/15

N2 - Gas-phase photocatalytic oxidation (PCO) and adsorption of diethyl sulfide and ethanol in a batch reactor using Cr-modified TiO 2-loaded MCM-41 silica and commercial TiO 2 as photocatalysts were studied with in situ FTIR method. Mesoporous molecular sieves MCM-41 modified with Cr were synthesized by hydrothermal method; Si:Cr atomic ratio was 80:1 or 20:1. Final deposition of 25% TiO 2 was conducted by sol-gel method using titanium isopropoxide as a precursor. Adsorption measurements in a static reactor were used to estimate the Langmuir isotherm parameters (monolayer capacity and adsorption constant). Photooxidation experiments under UV irradiation demonstrated that TiO 2 loading on Cr-MCM-41 improve its activity in diethyl sulfide removal but decelerated the CO 2 formation. On the contrary, the rate of ethanol oxidation increased strongly as a result of TiO 2 loading and the highest activity was observed for 25% TiO 2/MCM-41 photocatalyst without chromium. Sulfate species were detected on the TiO 2 surface after complete diethyl sulfide oxidation. Water and CO 2 were identified as the final products whereas acetaldehyde and CO were identified as by-products of ethanol photocatalytic oxidation. Visible light activity was not detected for TiO 2/MCM-41 and TiO 2/Cr-MCM-41 photocatalysts in oxidation of gas phase diethyl sulfide and ethanol.

AB - Gas-phase photocatalytic oxidation (PCO) and adsorption of diethyl sulfide and ethanol in a batch reactor using Cr-modified TiO 2-loaded MCM-41 silica and commercial TiO 2 as photocatalysts were studied with in situ FTIR method. Mesoporous molecular sieves MCM-41 modified with Cr were synthesized by hydrothermal method; Si:Cr atomic ratio was 80:1 or 20:1. Final deposition of 25% TiO 2 was conducted by sol-gel method using titanium isopropoxide as a precursor. Adsorption measurements in a static reactor were used to estimate the Langmuir isotherm parameters (monolayer capacity and adsorption constant). Photooxidation experiments under UV irradiation demonstrated that TiO 2 loading on Cr-MCM-41 improve its activity in diethyl sulfide removal but decelerated the CO 2 formation. On the contrary, the rate of ethanol oxidation increased strongly as a result of TiO 2 loading and the highest activity was observed for 25% TiO 2/MCM-41 photocatalyst without chromium. Sulfate species were detected on the TiO 2 surface after complete diethyl sulfide oxidation. Water and CO 2 were identified as the final products whereas acetaldehyde and CO were identified as by-products of ethanol photocatalytic oxidation. Visible light activity was not detected for TiO 2/MCM-41 and TiO 2/Cr-MCM-41 photocatalysts in oxidation of gas phase diethyl sulfide and ethanol.

KW - CWA

KW - Diethyl sulfide

KW - Ethanol

KW - MCM

KW - Photocatalytic oxidation

KW - Titanium dioxide

KW - Transition metal doping

KW - Visible light

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U2 - 10.1016/j.jphotochem.2012.01.013

DO - 10.1016/j.jphotochem.2012.01.013

M3 - ???researchoutput.researchoutputtypes.contributiontojournal.article???

AN - SCOPUS:84856981787

SN - 1010-6030

VL - 232

SP - 1

EP - 7

JO - Journal of Photochemistry and Photobiology A: Chemistry

JF - Journal of Photochemistry and Photobiology A: Chemistry

ER -

Cr modified TiO ₂-loaded MCM-41 catalysts for UV-light driven photodegradation of diethyl sulfide and ethanol

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Keywords

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