Correlation between photoactivity of TiO2 and diffusion of Na+ ions from soda lime glass

Gill Sang Han; Yeonghun Yun; Min Hee Kim; Se Hoon Han; Hyun Suk Jung; Sangwook Lee

doi:10.1016/j.matlet.2018.06.057

Correlation between photoactivity of TiO₂ and diffusion of Na⁺ ions from soda lime glass

Gill Sang Han, Yeonghun Yun, Min Hee Kim, Se Hoon Han, Hyun Suk Jung, Sangwook Lee

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

In this study, we report the effects of Na⁺ diffusion into TiO₂ during thermal annealing on TiO₂ photocatalysis. After annealing at 500 °C for 1 h, the photoactivity of colloidal sol-based crystalline TiO₂ is almost similar regardless of substrates. Interestingly, after the annealing the photoactivity of polymeric sol-based amorphous TiO₂ thin film on soda lime glass (SLG) is significantly reduced compared to that on quartz. We observed that Na⁺ does not easily bond with Ti–O–Ti in crystalline TiO₂, while large amount of Ti–O–Na bonds are formed in the amorphous TiO₂ on SLG during crystallization at 500 °C. Our results suggest that the control of TiO₂ photoactivity has applications in improving photo-stability of various optoelectronic devices.

Original language	English
Pages (from-to)	351-355
Number of pages	5
Journal	Materials Letters
Volume	228
DOIs	https://doi.org/10.1016/j.matlet.2018.06.057
State	Published - 1 Oct 2018

Keywords

Amorphous TiO
Annealing
Crystalline TiO
Na diffusion
Photocatalysis

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title = "Correlation between photoactivity of TiO2 and diffusion of Na+ ions from soda lime glass",

abstract = "In this study, we report the effects of Na+ diffusion into TiO2 during thermal annealing on TiO2 photocatalysis. After annealing at 500 °C for 1 h, the photoactivity of colloidal sol-based crystalline TiO2 is almost similar regardless of substrates. Interestingly, after the annealing the photoactivity of polymeric sol-based amorphous TiO2 thin film on soda lime glass (SLG) is significantly reduced compared to that on quartz. We observed that Na+ does not easily bond with Ti–O–Ti in crystalline TiO2, while large amount of Ti–O–Na bonds are formed in the amorphous TiO2 on SLG during crystallization at 500 °C. Our results suggest that the control of TiO2 photoactivity has applications in improving photo-stability of various optoelectronic devices.",

keywords = "Amorphous TiO, Annealing, Crystalline TiO, Na diffusion, Photocatalysis",

author = "Han, {Gill Sang} and Yeonghun Yun and Kim, {Min Hee} and Han, {Se Hoon} and Jung, {Hyun Suk} and Sangwook Lee",

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doi = "10.1016/j.matlet.2018.06.057",

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T1 - Correlation between photoactivity of TiO2 and diffusion of Na+ ions from soda lime glass

AU - Han, Gill Sang

AU - Yun, Yeonghun

AU - Kim, Min Hee

AU - Han, Se Hoon

AU - Jung, Hyun Suk

AU - Lee, Sangwook

PY - 2018/10/1

Y1 - 2018/10/1

N2 - In this study, we report the effects of Na+ diffusion into TiO2 during thermal annealing on TiO2 photocatalysis. After annealing at 500 °C for 1 h, the photoactivity of colloidal sol-based crystalline TiO2 is almost similar regardless of substrates. Interestingly, after the annealing the photoactivity of polymeric sol-based amorphous TiO2 thin film on soda lime glass (SLG) is significantly reduced compared to that on quartz. We observed that Na+ does not easily bond with Ti–O–Ti in crystalline TiO2, while large amount of Ti–O–Na bonds are formed in the amorphous TiO2 on SLG during crystallization at 500 °C. Our results suggest that the control of TiO2 photoactivity has applications in improving photo-stability of various optoelectronic devices.

AB - In this study, we report the effects of Na+ diffusion into TiO2 during thermal annealing on TiO2 photocatalysis. After annealing at 500 °C for 1 h, the photoactivity of colloidal sol-based crystalline TiO2 is almost similar regardless of substrates. Interestingly, after the annealing the photoactivity of polymeric sol-based amorphous TiO2 thin film on soda lime glass (SLG) is significantly reduced compared to that on quartz. We observed that Na+ does not easily bond with Ti–O–Ti in crystalline TiO2, while large amount of Ti–O–Na bonds are formed in the amorphous TiO2 on SLG during crystallization at 500 °C. Our results suggest that the control of TiO2 photoactivity has applications in improving photo-stability of various optoelectronic devices.

KW - Amorphous TiO

KW - Annealing

KW - Crystalline TiO

KW - Na diffusion

KW - Photocatalysis

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U2 - 10.1016/j.matlet.2018.06.057

DO - 10.1016/j.matlet.2018.06.057

M3 - Article

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SN - 0167-577X

VL - 228

SP - 351

EP - 355

JO - Materials Letters

JF - Materials Letters

ER -

Correlation between photoactivity of TiO₂ and diffusion of Na⁺ ions from soda lime glass

Abstract

Keywords

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