Transparent TiO2 Nanotubes Arrays Directly Grown o
Post# of 22456
Posted On: 10/18/2016 1:19:42 PM
Transparent TiO2 Nanotubes Arrays Directly Grown on Quartz Glass Used in Front- and Back-Side Irradiation Configuration for Photocatalytic H2 Generation
JeongEun Yoo, Marco Altomare, Mohamed Mokhtar, Abdelmohsen Alshehri, Shaeel A. Al-Thabaiti, Anca Mazare, Patrik Schmuki
(Submitted on 17 Oct 2016)
In the present work we explore the front- and back-side performance of a photocatalytic platform consisting of self-organized TiO2 nanotube layers formed by complete anodization of Ti metal films evaporated on quartz slides. The adhesion and light transmission of the tube layers on the quartz surfaces are optimized by a suitable anodization procedure. After their growth, the nanotube arrays were converted into crystalline structures and sputter-coated with co-catalytic Pt nanoparticles. The optically transparent quartz substrates enable the use of the Pt-decorated tube layers for photocatalytic H2 generation under either front- or back-side illumination configurations. The nanotube films on quartz are characterized in view of their physico-chemical properties, including their light transmission features measured using different light sources . The results show that the front-side illumination under optimized factors, i.e., the amount of loaded co-catalyst, yields a maximized photocatalytic performance in terms of H2 generation
https://arxiv.org/abs/1610.05224
Photocatalytic H2 generation using dewetted Pt-decorated TiO2 nanotubes - Optimized dewetting and oxide crystallization by a multiple annealing process
JeongEun Yoo, Marco Altomare, Mohamed Mokhtar, Abdelmohsen Alshehri, Shaeel A. Al-Thabaiti, Anca Mazare, Patrik Schmuki
(Submitted on 17 Oct 2016)
In the present work we use TiO2 nanotube arrays, carrying a Pt coating that is optimally dewetted, as a photocatalyst to generate H2. In order to achieve a maximum H2-generation efficiency, on the one hand an ideal thermal dewetting of the Pt layer into nanoparticles is needed that requires an oxygen free heat treatment, and on the other hand an optimal crystallization of the TiO2 nanotubes into anatase with reduced defect density is achieved only by annealing in O2 containing environment. To overcome this issue, we combine adequate reducing and oxidizing conditions in a multiple annealing treatment, and obtain Pt-decorated anatase TiO2 nanotubes showing significantly enhanced photocatalytic H2 generation ability.
https://arxiv.org/abs/1610.05208
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JeongEun Yoo, Marco Altomare, Mohamed Mokhtar, Abdelmohsen Alshehri, Shaeel A. Al-Thabaiti, Anca Mazare, Patrik Schmuki
(Submitted on 17 Oct 2016)
In the present work we explore the front- and back-side performance of a photocatalytic platform consisting of self-organized TiO2 nanotube layers formed by complete anodization of Ti metal films evaporated on quartz slides. The adhesion and light transmission of the tube layers on the quartz surfaces are optimized by a suitable anodization procedure. After their growth, the nanotube arrays were converted into crystalline structures and sputter-coated with co-catalytic Pt nanoparticles. The optically transparent quartz substrates enable the use of the Pt-decorated tube layers for photocatalytic H2 generation under either front- or back-side illumination configurations. The nanotube films on quartz are characterized in view of their physico-chemical properties, including their light transmission features measured using different light sources . The results show that the front-side illumination under optimized factors, i.e., the amount of loaded co-catalyst, yields a maximized photocatalytic performance in terms of H2 generation
https://arxiv.org/abs/1610.05224
Photocatalytic H2 generation using dewetted Pt-decorated TiO2 nanotubes - Optimized dewetting and oxide crystallization by a multiple annealing process
JeongEun Yoo, Marco Altomare, Mohamed Mokhtar, Abdelmohsen Alshehri, Shaeel A. Al-Thabaiti, Anca Mazare, Patrik Schmuki
(Submitted on 17 Oct 2016)
In the present work we use TiO2 nanotube arrays, carrying a Pt coating that is optimally dewetted, as a photocatalyst to generate H2. In order to achieve a maximum H2-generation efficiency, on the one hand an ideal thermal dewetting of the Pt layer into nanoparticles is needed that requires an oxygen free heat treatment, and on the other hand an optimal crystallization of the TiO2 nanotubes into anatase with reduced defect density is achieved only by annealing in O2 containing environment. To overcome this issue, we combine adequate reducing and oxidizing conditions in a multiple annealing treatment, and obtain Pt-decorated anatase TiO2 nanotubes showing significantly enhanced photocatalytic H2 generation ability.
https://arxiv.org/abs/1610.05208
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