Photocatalytic Characteristics of Titania Thin Film Prepared by Micro Arc Oxidation

Oh, Han-Jun; Lee, Jong Ho; Soo, Choong

doi:10.4028/www.scientific.net/kem.543.141

Cited by 4 publications

(2 citation statements)

References 8 publications

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“…In addition, systems based on TiO 2 , in which oxides of refractory, transition, and rare earth metals are additionally incorporated, exhibit high catalytic activity [6,7].…”

Section: Research Of Existing Solutionsmentioning

confidence: 99%

Development of an approach to improvement the protection of the population in protective buildings of civil protection in the conditions of air pollution by toxic chemical agents

Karakurkchi

Сахненко

Korogodskaya

et al. 2022

TAPR

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The object of research is the process of air purification from toxic chemicals in the filter ventilation systems of civil protection facilities, the subject of the study is the use of catalytic materials based on titanium dioxide coatings in filter ventilation systems. One of the most problematic places is the expired expiration dates of absorber filters used in the filter ventilation systems of civil protection structures. This can lead to a decrease in their protective effect on the disinfection of outdoor air in the conditions of man-made accidents, military operations or terrorist acts. As a result, it poses a threat to the life and health of people. To solve this problem, it is proposed to use catalytic materials based on titanium dioxide, obtained by plasma-electrolyte oxidation, in the filter-ventilation systems of civil protection facilities. In the course of the study, TiO2·MO coatings were formed on model titanium samples, where M is W, Mo, Zr, Zn. Using the methods of energy dispersive X-ray spectrometry, scanning electron and atomic force microscopy, and photocolorimetric studies, the properties of the synthesized functional materials were studied and the possibilities of their application in the technology of photocatalytic oxidation of toxic substances were determined. An analysis was also made of possible designs of photocatalytic blocks for filter ventilation systems using catalytic materials based on TiO2. It has been determined that the optimal technological form of a catalyst in a photocatalytic block is the deposition of a layer of titanium dioxide doped with additional components on a structured base by plasma-electrolyte oxidation. The results obtained made it possible to create proposals for the use of synthesized catalytic materials to increase the degree of protection of the population at civil protection facilities. In particular, it is proposed to arrange the existing filter ventilation systems with a photocatalytic unit (module) to increase the efficiency of neutralizing chemically hazardous substances, and, consequently, the degree of protection of people. The direction of further research is related to the manufacture of a mock-up sample of the photocatalytic unit and bench tests to study the effectiveness of air disinfection.

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“…In addition, systems based on TiO 2 , in which oxides of refractory, transition, and rare earth metals are additionally incorporated, exhibit high catalytic activity [6,7].…”

Section: Research Of Existing Solutionsmentioning

confidence: 99%

Development of an approach to improvement the protection of the population in protective buildings of civil protection in the conditions of air pollution by toxic chemical agents

Karakurkchi

Сахненко

Korogodskaya

et al. 2022

TAPR

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“…20,22,24 There is an extensive amount of research focused on tuning morphology, crystallinity and chemical composition of anodic compact layers, 3,5,[23][24][25][26] as well as on their photoinduced properties as photoelectrochemical water splitting and photocurrent production [27][28][29][30][31] or photodegradation of organic dyes (acid-orange 7 -AO7, methylene blue -ME, Rhodamine B -RhB, etc.). [32][33][34][35][36][37][38] Nevertheless, an overview of the key parameters affecting photoresponse of compact layers is not straightforward, due to the large range of different anodizing conditions reported (i.e. electrolyte, potentiostatic or galvanostatic mode, sample pre-treatment and many more).…”

Section: Or B) Induced By Further Thermal Annealing At Temperatures Rmentioning

confidence: 99%

Key Oxidation Parameters that Influence Photo-Induced Properties and Applications of Anodic Titanium Oxides

Piazza

Mazare

Diamanti

et al. 2015

J. Electrochem. Soc.

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In the present work we investigate compact anodic oxides formed on titanium by a broad range of anodizing parameters (electrolyte, applied voltage, substrate pre-treatment) and their influence on the performance of such oxides in photocurrent response and photocatalytic properties (photodegradation of AO7). In general, crystallinity and ion inclusion from the electrolyte are crucial. As-grown compact layers of partial crystallinity show increased efficiencies in both applications; interestingly, phosphate ions have a detrimental effect, whereas sulfate ions do not. After thermal annealing (crystallization) the photoresponse significantly increases: except for a crystallization of the anodic layer, annealing causes a rutile oxide layer growth at the oxide/metal interface -this is found to additionally affect the photoresponse. Results overall demonstrate that higher anodization voltage, exclusion of phosphates from the electrolyte, substrate pre-treatment and annealing are of major importance for achieving an enhanced photoresponse on compact anodic layers.

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Application-wise nanostructuring of anodic films on titanium: a review

Diamanti

Ormellese

Pedeferri

2015

Journal of Experimental Nanoscience

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Photocatalytic Characteristics of Titania Thin Film Prepared by Micro Arc Oxidation

Cited by 4 publications

References 8 publications

Development of an approach to improvement the protection of the population in protective buildings of civil protection in the conditions of air pollution by toxic chemical agents

Development of an approach to improvement the protection of the population in protective buildings of civil protection in the conditions of air pollution by toxic chemical agents

Key Oxidation Parameters that Influence Photo-Induced Properties and Applications of Anodic Titanium Oxides

Application-wise nanostructuring of anodic films on titanium: a review

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