Application of S-doped TiO2 photocatalysts in degradation of BTEX from synthetic surfaces

In the context of the increase in chemical threat due to warfare agents, the development of efficient methods for destruction of Chemical Warfare Agents (CWAs) are of first importance both for civilian and military purposes. Amongst possible methods for destruction of CWAs, photocatalytic oxidation is an alternative one. The present paper reports on the preparation of Ta and Sn doped TiO2 photocatalysts immobilized on β-SiC foams for the elimination of diethyl sulfide (DES) used as a model molecule mimicking Yperite (Mustard Gas) in gaseous phase. Photo-oxidation efficiency of doped TiO2 catalyst has been compared with TiO2-P25. Here, we demonstrate that the Sn doped-TiO2 with a Polyethylene glycol (PEG)/TiO2 ratio of 7 exhibits the best initial activity (up to 90%) but is deactivates more quickly than Ta doped-TiO2 (40% after 800 min). The activity of the catalysts is strongly influenced by the adsorption properties of the support, as β-SiC foams adsorb DES and other sulfur compounds. This adsorption makes it possible to limit the poisoning of the catalysts and to maintain an acceptable conversion rate even after ten hours under continuous DES flow. Washing with NaOH completely regenerates the catalyst after a firs treatment and even seems to “wash” it by removing impurities initially present on the foams.

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A comparative run for visible-light-driven photocatalytic activity of anionic and cationic S-doped TiO2 photocatalysts: A case study of possible sulfur doping through chemical protocol

Journal of Molecular Catalysis A Chemical ◽

10.1016/j.molcata.2016.05.003 ◽

2016 ◽

Vol 421 ◽

pp. 1-15 ◽

Cited By ~ 24

Author(s):

Shahzad Abu Bakar ◽

Caue Ribeiro

Keyword(s):

Photocatalytic Activity ◽

Visible Light ◽

Tio2 Photocatalysts ◽

Doped Tio2 ◽

Sulfur Doping ◽

Visible Light Driven

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The influence of the local structure of Fe(III) on the photocatalytic activity of doped TiO2 photocatalysts—An EXAFS, XPS and Mössbauer spectroscopic study

Applied Catalysis B Environmental ◽

10.1016/j.apcatb.2011.01.033 ◽

2011 ◽

Vol 103 (1-2) ◽

pp. 232-239 ◽

Cited By ~ 45

Author(s):

Éva G. Bajnóczi ◽

Nándor Balázs ◽

Károly Mogyorósi ◽

Dávid F. Srankó ◽

Zsolt Pap ◽

...

Keyword(s):

Photocatalytic Activity ◽

Spectroscopic Study ◽

Local Structure ◽

Tio2 Photocatalysts ◽

Doped Tio2

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Effect of sacrificial electron donors on hydrogen generation over visible light–irradiated nonmetal-doped TiO2 photocatalysts

Transition Metal Chemistry ◽

10.1007/s11243-011-9562-3 ◽

2011 ◽

Vol 37 (1) ◽

pp. 93-96 ◽

Cited By ~ 23

Author(s):

Ujjwal Pal ◽

Sarita Ghosh ◽

Debabrata Chatterjee

Keyword(s):

Visible Light ◽

Hydrogen Generation ◽

Electron Donors ◽

Tio2 Photocatalysts ◽

Doped Tio2

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C-,N- and S-Doped TiO2 Photocatalysts: A Review

Catalysts ◽

10.3390/catal11010144 ◽

2021 ◽

Vol 11 (1) ◽

pp. 144

Author(s):

Aleksandra Piątkowska ◽

Magdalena Janus ◽

Kacper Szymański ◽

Sylwia Mozia

Keyword(s):

Carbon Dioxide Reduction ◽

Air Purification ◽

Lithium Storage ◽

Tio2 Photocatalysts ◽

Doped Tio2 ◽

Preparation Conditions ◽

Production Of Hydrogen ◽

Methods Of Synthesis ◽

Metal Doped ◽

Inactivation Of Bacteria

This article presents an overview of the reports on the doping of TiO2 with carbon, nitrogen, and sulfur, including single, co-, and tri-doping. A comparison of the properties of the photocatalysts synthesized from various precursors of TiO2 and C, N, or S dopants is summarized. Selected methods of synthesis of the non-metal doped TiO2 are also described. Furthermore, the influence of the preparation conditions on the doping mode (interstitial or substitutional) with reference to various types of the modified TiO2 is summarized. The mechanisms of photocatalysis for the different modes of the non-metal doping are also discussed. Moreover, selected applications of the non-metal doped TiO2 photocatalysts are shown, including the removal of organic compounds from water/wastewater, air purification, production of hydrogen, lithium storage, inactivation of bacteria, or carbon dioxide reduction.

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