Evolution of zirconia coating layer on rutile TiO2 surface and the pigmentary property

Zhang, Yunsheng; Yin, Hengbo; Wang, Aili; Li, Chun; Long, Yu; Jiang, Tingshun; Hang, Ying

doi:10.1016/j.jpcs.2010.07.013

Cited by 38 publications

(33 citation statements)

References 11 publications

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“…6 ZrO 2 coatings on TiO 2 also enhance optical scattering, which is beneficial for light harvesting increasing the optical pathway. 18…”

Section: Introductionmentioning

confidence: 99%

“…6 ZrO 2 coatings on TiO 2 also enhance optical scattering, which is beneficial for light harvesting increasing the optical pathway. 18 In the present study, we report the combined effect of Zr incorporation and vacuum annealing on the photoelectrochemical properties of TiO 2 nanotubes for light-driven water oxidation. We have found that both Zr addition and vacuum annealing lead to the creation of surface oxygen vacancies, which produce optical scattering and consequently slightly enhanced light harvesting efficiency and more relevantly induce surface stress and an anodic band shift, both beneficial effects for enhanced photo-electrocatalytic activity of the TiO 2 nanotubes toward water oxidation.…”

Section: ■ Introductionmentioning

confidence: 99%

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TiO₂ Nanotubes for Solar Water Splitting: Vacuum Annealing and Zr Doping Enhance Water Oxidation Kinetics

et al. 2019

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Herein, we report the cooperative effect of Zr doping and vacuum annealing on the carrier dynamics and interfacial kinetics of anodized TiO2 nanotubes for light-driven water oxidation. After evaluation of different Zr loads and different annealing conditions, it was found that both Zr doping and vacuum annealing lead to a significantly enhanced light harvesting efficiency and photoelectrochemical performance. The substitution of Zr4+ by Ti4+ species leads to a higher density of surface defects such as oxygen vacancies, facilitating electron trapping on Zr4+, which reduced the charge recombination and hence boosted the charge transfer kinetics. More importantly, vacuum annealing promoted the presence of surface defects. Furthermore, the mechanistic study through impedance spectroscopy revealed that both charge transfer and surface conductivity are significantly enhanced due the presence of an oxygen-deficient TiO2 surface. These results represent an important step forward in the optimization of nanostructured TiO2-based photoelectrodes, with high potential in photocatalytic applications, including solar fuel production.

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“…6 ZrO 2 coatings on TiO 2 also enhance optical scattering, which is beneficial for light harvesting increasing the optical pathway. 18…”

Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

TiO₂ Nanotubes for Solar Water Splitting: Vacuum Annealing and Zr Doping Enhance Water Oxidation Kinetics

et al. 2019

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“…However, some of the components can be co-precipitated to alter the pigment characteristics [1]. There are many works regarding this subject in literature [4][5][6][7][8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

TiO2 Applications as a Function of Controlled Surface Treatment

Veronovski¹

2018

Titanium Dioxide - Material for a Sustainable Environment

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For the end use, the structure and morphology of the coated film are very important since they determine the final properties of the resultant material. The effect of coatings largely depends on their composition and method of application, which may give porous or dense coatings. To achieve uniform coatings on dispersed TiO 2 particles, various compounds were deposited one after another under specific conditions by the wet chemical deposition method starting from rutile TiO 2 , produced by the sulfate method in Cinkarna Celje. With the synthesis of composite particles consisting of a core TiO 2 particle coated with a functional shell with dimensions in the nano scale, we prepared advanced materials, where the shell protects the particles from undesirable interactions with the environment and improves surface reactive properties of the dispersed particles to meet special requirements. The morphology of surface-treated TiO 2 particles has been identified directly using electron microscopy, while the degree of functionalization by various hydroxides was determined using X-ray fluorescence spectrometer (XRF). In addition, zeta potential (ZP) measurements have been utilized to determine the electrochemical properties of resultant particles. The precipitation of hydroxides on the TiO 2 surface resulted in the shift of the isoelectric point (IEP). UV-Vis spectroscopy has been used for determining light scattering efficiency. In addition to internal characterization, light fastness of durable grade intended for the application in laminates has been tested by the end user.

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“…Inorganic surface treatments play a role in improving weather resistance and photostability, as well as the colloid chemical and optical properties of pigmentary TiO2 [2]. Several published papers deal with the surface treatment of TiO2 pigments with inorganic layers [3][4][5][6][7].…”

Section: Introduction*mentioning

confidence: 99%

Alumina Surface Treated Pigmentary Titanium Dioxide with Suppressed Photoactivity

Veronovski

Lešnik

Verhovšek

2014

J. Coat. Sci. Technol.

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The aim of the optimization of the technological process was to coat the surface of the pigment in a controlled manner and to supress photoactivity in the titanium dioxide (TiO2) pigment. As part of this research, a systematic approach to TiO2 pigment surface treatment with alumina was conducted. Surface treatment with alumina plays a significant role in the improvement of TiO2 properties (e.g. weather resistance and photostability). This research encompasses a raw material analysis and process conditions study. Sodium aluminate and aluminium sulphate were used as a source of alumina hydroxide. The effectiveness of surface treatment was determined using scanning-transmission (STEM) and transmission (TEM) electron microscopy. The photoactivity of pigmentary TiO2 was determined before and after surface treatment. A controlled surface treatment process resulted in pigmentary TiO2 particles with uniform amorphous layers, which supressed the photoactivity of the pigment.

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Evolution of zirconia coating layer on rutile TiO2 surface and the pigmentary property

Cited by 38 publications

References 11 publications

TiO₂ Nanotubes for Solar Water Splitting: Vacuum Annealing and Zr Doping Enhance Water Oxidation Kinetics

TiO₂ Nanotubes for Solar Water Splitting: Vacuum Annealing and Zr Doping Enhance Water Oxidation Kinetics

TiO2 Applications as a Function of Controlled Surface Treatment

Alumina Surface Treated Pigmentary Titanium Dioxide with Suppressed Photoactivity

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Evolution of zirconia coating layer on rutile TiO2 surface and the pigmentary property

Cited by 38 publications

References 11 publications

TiO2 Nanotubes for Solar Water Splitting: Vacuum Annealing and Zr Doping Enhance Water Oxidation Kinetics

TiO2 Nanotubes for Solar Water Splitting: Vacuum Annealing and Zr Doping Enhance Water Oxidation Kinetics

TiO2 Applications as a Function of Controlled Surface Treatment

Alumina Surface Treated Pigmentary Titanium Dioxide with Suppressed Photoactivity

Contact Info

Product

Resources

About

TiO₂ Nanotubes for Solar Water Splitting: Vacuum Annealing and Zr Doping Enhance Water Oxidation Kinetics

TiO₂ Nanotubes for Solar Water Splitting: Vacuum Annealing and Zr Doping Enhance Water Oxidation Kinetics