Development of photocatalytic self-cleaning surfaces on 316 stainless steel

Surfaces that are able to keep themselves clean with the aid of water are described as self-cleaning surfaces. Such surfaces have drawn a lot of attention due to their numerous applications in food, aerospace, manufacturing and other industries. Self-cleaning for metals and alloys is usually achieve...

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Main Author: Ong, Jun Hui
Other Authors: Chen Zhong
Format: Final Year Project
Language:English
Published: Nanyang Technological University 2023
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Online Access:https://hdl.handle.net/10356/165790
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1657902023-04-15T16:46:20Z Development of photocatalytic self-cleaning surfaces on 316 stainless steel Ong, Jun Hui Chen Zhong School of Materials Science and Engineering Advanced Remanufacturing and Technology Centre (ARTC) ASZChen@ntu.edu.sg Engineering::Materials Surfaces that are able to keep themselves clean with the aid of water are described as self-cleaning surfaces. Such surfaces have drawn a lot of attention due to their numerous applications in food, aerospace, manufacturing and other industries. Self-cleaning for metals and alloys is usually achieved by creating hydrophobic textured surfaces. However, such surfaces obtained by texturing are unstable as their wettability changes over time. An alternative to create such hydrophobic surfaces is through the photocatalytic effect where a semiconductor material is able to generate radicals to remove organic contaminants upon the illumination of UV light. In this study, the use of photocatalytic TiO2 coating on 316 stainless steel surfaces to obtain the self-cleaning effect was explored. In order to meet the objective, this project studied the photocatalytic efficiency of TiO2 coating deposited on smooth and textured surfaces. Various thermal oxidation temperatures were also explored to study how it affects the photocatalytic efficiency of TiO2 coating. The self-cleaning ability is demonstrated using the photocatalytic degradation of methylene blue. The results showed that the textured samples achieved a good bonding of TiO2 coating and a better self-cleaning effect as compared to the smooth samples. Generally, a better self-cleaning effect could be observed for TiO2 films that were obtained by thermally oxidising Ti films at lower temperatures. However, more experimental work should be performed to develop a deeper understanding of underlying mechanisms. The study concluded with a brief discussion of the limitations of the experimental results in order to provide some recommendations for future works. Bachelor of Engineering (Materials Engineering) 2023-04-12T02:04:22Z 2023-04-12T02:04:22Z 2023 Final Year Project (FYP) Ong, J. H. (2023). Development of photocatalytic self-cleaning surfaces on 316 stainless steel. Final Year Project (FYP), Nanyang Technological University, Singapore. https://hdl.handle.net/10356/165790 https://hdl.handle.net/10356/165790 en application/pdf Nanyang Technological University
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Materials
spellingShingle Engineering::Materials
Ong, Jun Hui
Development of photocatalytic self-cleaning surfaces on 316 stainless steel
description Surfaces that are able to keep themselves clean with the aid of water are described as self-cleaning surfaces. Such surfaces have drawn a lot of attention due to their numerous applications in food, aerospace, manufacturing and other industries. Self-cleaning for metals and alloys is usually achieved by creating hydrophobic textured surfaces. However, such surfaces obtained by texturing are unstable as their wettability changes over time. An alternative to create such hydrophobic surfaces is through the photocatalytic effect where a semiconductor material is able to generate radicals to remove organic contaminants upon the illumination of UV light. In this study, the use of photocatalytic TiO2 coating on 316 stainless steel surfaces to obtain the self-cleaning effect was explored. In order to meet the objective, this project studied the photocatalytic efficiency of TiO2 coating deposited on smooth and textured surfaces. Various thermal oxidation temperatures were also explored to study how it affects the photocatalytic efficiency of TiO2 coating. The self-cleaning ability is demonstrated using the photocatalytic degradation of methylene blue. The results showed that the textured samples achieved a good bonding of TiO2 coating and a better self-cleaning effect as compared to the smooth samples. Generally, a better self-cleaning effect could be observed for TiO2 films that were obtained by thermally oxidising Ti films at lower temperatures. However, more experimental work should be performed to develop a deeper understanding of underlying mechanisms. The study concluded with a brief discussion of the limitations of the experimental results in order to provide some recommendations for future works.
author2 Chen Zhong
author_facet Chen Zhong
Ong, Jun Hui
format Final Year Project
author Ong, Jun Hui
author_sort Ong, Jun Hui
title Development of photocatalytic self-cleaning surfaces on 316 stainless steel
title_short Development of photocatalytic self-cleaning surfaces on 316 stainless steel
title_full Development of photocatalytic self-cleaning surfaces on 316 stainless steel
title_fullStr Development of photocatalytic self-cleaning surfaces on 316 stainless steel
title_full_unstemmed Development of photocatalytic self-cleaning surfaces on 316 stainless steel
title_sort development of photocatalytic self-cleaning surfaces on 316 stainless steel
publisher Nanyang Technological University
publishDate 2023
url https://hdl.handle.net/10356/165790
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