Doped TiO<sub>2</sub>: the effect of doping elements on photocatalytic activity

Khlyustova, A. V.; Sirotkin, Nikolay; Kusova, T. V.; Краев, А. С.; Титов, В. А.; Агафонов, А. В.

doi:10.1039/d0ma00171f

Cited by 191 publications

(100 citation statements)

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“…The incorporation of Mo into the TiO 2 lattice by diaphragm discharge leads to a significant decrease in E g and increase in specific surface area. In the case of underwater plasma, a comparison of the results obtained with previous data 17 showed that varying the plasma parameters makes it possible to change the content of the doping material.…”

Section: Adsorption and Photocatalytic Activitymentioning

confidence: 83%

“…The synthesis of nanostructured TiO 2 was carried out by using the sol-gel method described in detail elsewhere. 17,22 The loading of Mo was achieved by two methods, as reflected in the scheme (Fig. 1).…”

Section: Methods Of Loadingmentioning

confidence: 99%

“…15 In our previous work, we successfully doped TiO 2 with various metals under underwater plasma conditions. 17 Metal electrodes were used as precursors of doping metals. As the first step in our research, we compare four methods of loading molybdenum: a simple wet chemical method and three types of lowtemperature plasma.…”

Section: Introductionmentioning

confidence: 99%

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Mo‐doped TiO₂ using plasma in contact with liquids: advantages and limitations

Khlyustova

Sirotkin

Краев

et al. 2020

J of Chemical Tech & Biotech

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BACKGROUND The presented work focuses on the comparison of sorption and photocatalytic properties of TiO2 doped with molybdenum using different methods of Mo loading. The structural and photocatalytic characteristics of doped TiO2 are determined by the method of synthesis and loading of the dopant element. As an alternative to simple wet chemical loading, three types of low‐temperature plasma in contact with liquid are considered: atmospheric pressure glow discharge, underwater diaphragm discharge, and underwater plasma. RESULTS The results show that the introduction of Mo, regardless of the doping method, leads to a decrease in the band gap. The surface characteristics of powders depend on the doping method. The sorption capacity increases two to three times, and the efficiency of photodestruction increases from 52% to 96% when exposed to visible light for 60 min. CONCLUSIONS A comparison of the sorption and photocatalytic activity of Mo‐doped TiO2 showed the inexpediency of using a glow discharge for doping. The synthesis of a highly efficient sorbent or photocatalyst can be determined by the type of underwater plasma. © 2020 Society of Chemical Industry

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Section: Adsorption and Photocatalytic Activitymentioning

confidence: 83%

Section: Methods Of Loadingmentioning

confidence: 99%

See 1 more Smart Citation

Mo‐doped TiO₂ using plasma in contact with liquids: advantages and limitations

Khlyustova

Sirotkin

Краев

et al. 2020

J of Chemical Tech & Biotech

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“…The substrates were placed on the substrate holder in the deposition chamber of PEALD (R200 advance, Picosun Oy, Espoo, Finland). The used metal precursors were Ta(OEt) 5 and TTIP (Aimou Yuan Scientific, Nanjing, China) as the Ta and Ti sources, respectively. Nitrogen with a purity of 99.999% was introduced to the precursor bubblers to transport the precursor vapors to the deposition chamber.…”

Section: Thin Film Preparationmentioning

confidence: 99%

“…Titanium dioxide (TiO 2 ) thin films are widely studied owing to their optoelectrical properties that fulfill the requirements of numerous applications such as dye-sensitized photovoltaic devices [1], photocatalysis [2], and perovskite solar cells (PSCs) [3]. In order to enhance properties, the TiO 2 films are commonly doped with transition metal, rare metal, or noble metal ions [4][5][6][7][8][9]. Some studies indicate that the electron-hole recombination could be reduced due to the generation of the charge trapping centers by foreign ions [10].…”

Section: Introductionmentioning

confidence: 99%

Tantalum-Doped TiO2 Prepared by Atomic Layer Deposition and Its Application in Perovskite Solar Cells

et al. 2021

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Tantalum (Ta)-doped titanium oxide (TiO2) thin films are grown by plasma enhanced atomic layer deposition (PEALD), and used as both an electron transport layer and hole blocking compact layer of perovskite solar cells. The metal precursors of tantalum ethoxide and titanium isopropoxide are simultaneously injected into the deposition chamber. The Ta content is controlled by the temperature of the metal precursors. The experimental results show that the Ta incorporation introduces oxygen vacancies defects, accompanied by the reduced crystallinity and optical band gap. The PEALD Ta-doped films show a resistivity three orders of magnitude lower than undoped TiO2, even at a low Ta content (0.8–0.95 at.%). The ultraviolet photoelectron spectroscopy spectra reveal that Ta incorporation leads to a down shift of valance band and conduction positions, and this is helpful for the applications involving band alignment engineering. Finally, the perovskite solar cell with Ta-doped TiO2 electron transport layer demonstrates significantly improved fill factor and conversion efficiency as compared to that with the undoped TiO2 layer.

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Multiphoton Upconversion Materials for Photocatalysis and Environmental Remediation

Chan

et al. 2021

Chemistry An Asian Journal

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Solar‐driven photocatalysis holds great potential for energy conversion, environmental remediation, and sustainable chemistry. However, practical applications of conventional photocatalytic systems have been constrained by their insufficient ability to harvest solar radiation in the infrared spectrum. Lanthanide‐doped upconversion materials possess high photostability, tunable absorption, and the ability to convert low‐energy infrared radiation into high‐energy emission, making them attractive for infrared‐driven photocatalysis. This review highlights essential principles for rational design of efficient photocatalysts. Particular emphasis is placed on current state‐of‐the‐arts that offer enhanced upconversion luminescence efficiency. We also summarize recent advances in lanthanide‐doped upconversion materials for photocatalysis. We conclude with new challenges and prospects for future developments of infrared‐driven photocatalysts.

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Doped TiO₂: the effect of doping elements on photocatalytic activity

Abstract:
Doping of TiO₂ with various elements increases its photocatalytic activity due to the formation of new energy levels near the conduction band.

Cited by 191 publications

References 50 publications

Mo‐doped TiO₂ using plasma in contact with liquids: advantages and limitations

Mo‐doped TiO₂ using plasma in contact with liquids: advantages and limitations

Tantalum-Doped TiO2 Prepared by Atomic Layer Deposition and Its Application in Perovskite Solar Cells

Multiphoton Upconversion Materials for Photocatalysis and Environmental Remediation

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Doped TiO2: the effect of doping elements on photocatalytic activity

Abstract: Doping of TiO2 with various elements increases its photocatalytic activity due to the formation of new energy levels near the conduction band.

Cited by 191 publications

References 50 publications

Mo‐doped TiO2 using plasma in contact with liquids: advantages and limitations

Mo‐doped TiO2 using plasma in contact with liquids: advantages and limitations

Tantalum-Doped TiO2 Prepared by Atomic Layer Deposition and Its Application in Perovskite Solar Cells

Multiphoton Upconversion Materials for Photocatalysis and Environmental Remediation

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Product

Resources

About

Doped TiO₂: the effect of doping elements on photocatalytic activity

Abstract:
Doping of TiO₂ with various elements increases its photocatalytic activity due to the formation of new energy levels near the conduction band.

Mo‐doped TiO₂ using plasma in contact with liquids: advantages and limitations

Mo‐doped TiO₂ using plasma in contact with liquids: advantages and limitations