Effect of Graphene/gold Nanoparticles Composite on the Photocatalytic Activity of TiO2
Phung, Hieu (2019)
Phung, Hieu
2019
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Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:amk-2019052913313
https://urn.fi/URN:NBN:fi:amk-2019052913313
Tiivistelmä
Titan dioxide (TiO2) is used in the enhanced oxidation method because of its ability in photocatalysis. It has shown its potential in the application of removal contaminant in the environment. However, the ability of disposing contaminant of TiO2 is efficient only under a specific wavelength. Therefore, two methods have been researched in order to increase the ability of TiO2 in photocatalysis under UV ray and visible light. The first one is to add metal nanoparticles to the surface of TiO2. The other one is to attach nanocarbon dots on TiO2. In this thesis work, Graphene and gold nanoparticles were chosen as a support for the photocatalysis of TiO2.
The aim of this thesis is to research about the effect of Graphene/gold nanoparticles on the photocatalysis of TiO2. In addition, the ratio of gold and graphene also affected to the ability of photocatalysis. Therefore, different samples with various ratios were made to determine a necessary sample with a specific ratio.
In conclusion, Graphene/gold nanoparticles do affect on the photocatalysis of TiO2. It improves the capacity of conduction band in TiO2, thus, TiO2 can produce more OH*, which is an important factor in oxidizing the pollutants in the environment. Moreover, the sample that gave the most potential result was 0.1%Au – Graphene/TiO2.
The thesis topic is belonged to Vietnam Academy of Science and Technology. The permission of doing this thesis work was given by Mr Duc Chinh Vu – supervisor in Vietnam Academy of Science and Technology.
The aim of this thesis is to research about the effect of Graphene/gold nanoparticles on the photocatalysis of TiO2. In addition, the ratio of gold and graphene also affected to the ability of photocatalysis. Therefore, different samples with various ratios were made to determine a necessary sample with a specific ratio.
In conclusion, Graphene/gold nanoparticles do affect on the photocatalysis of TiO2. It improves the capacity of conduction band in TiO2, thus, TiO2 can produce more OH*, which is an important factor in oxidizing the pollutants in the environment. Moreover, the sample that gave the most potential result was 0.1%Au – Graphene/TiO2.
The thesis topic is belonged to Vietnam Academy of Science and Technology. The permission of doing this thesis work was given by Mr Duc Chinh Vu – supervisor in Vietnam Academy of Science and Technology.