Synthesis of Fe3O4@TiO2 core-shell structure for effective particle-fluid separation after photocatalytic process

The usage of TiO2 photocatalysts inside liquid medium is facing a great challenge on difficulty and cost inefficient to be collected and reused by micro- or nano-filtration. Aiming to solve some disadvantages of TiO2 photocatalyst, a facile and effective synthesis method has been successfully devel...

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Main Author: Ng, Che Tean
Other Authors: Dong Zhili
Format: Final Year Project
Language:English
Published: 2014
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Online Access:http://hdl.handle.net/10356/55684
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-556842023-03-04T15:39:06Z Synthesis of Fe3O4@TiO2 core-shell structure for effective particle-fluid separation after photocatalytic process Ng, Che Tean Dong Zhili School of Materials Science and Engineering DRNTU::Engineering The usage of TiO2 photocatalysts inside liquid medium is facing a great challenge on difficulty and cost inefficient to be collected and reused by micro- or nano-filtration. Aiming to solve some disadvantages of TiO2 photocatalyst, a facile and effective synthesis method has been successfully developed to produce Fe3O4@TiO2 Core-Shell structure with magnetic Fe3O4 as cores and anatase TiO2 as shells. Firstly, the magnetite core nanoparticles were synthesized via low temperature oxidative hydrolysis method. During synthesis, the Fe3O4 colloidal dispersion was stabilized by a surfactant called Cetyl trimethylammonium bromide (CTAB), which serves to control the particle size and enhance the particle dispersion. On the synthesized Fe3O4 particles, a layer of TiO2 was in-situ formed, followed by heat treatment at three different temperatures to form the Fe3O4@TiO2 core-shell microspheres. Different characterization methods such as Scanning Electron Microscopy (SEM), X-ray Diffraction (XRD), Zeta Potential and Particle Size Analyzer, and Solar Simulator were used to analyze the synthesized products at different experimental stages. The results show that the core-shell structured particles exhibit sensitive response to an external applying magnetic field, thus the product is a promising candidate as a magnetic recoverable catalyst. Meanwhile, the visible light response of this Fe3O4@TiO2 Core-Shell structure was investigated by using Rhodamine B (RhB) solution illuminated under visible light in a solar simulator. The corresponding results show significant enhanced photoresponse to visible light compared to pure TiO2 photocatalyst, which serves as an evidence on the reduction in bandgap energy. Furthermore, the synthesized core-shell microspheres show high photocatalytic efficiency and have potential to be used in recoverable applications in waste water treatment with the help of magnetic separation. Bachelor of Engineering (Materials Engineering) 2014-03-21T02:37:21Z 2014-03-21T02:37:21Z 2014 2014 Final Year Project (FYP) http://hdl.handle.net/10356/55684 en Nanyang Technological University 49 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Engineering
spellingShingle DRNTU::Engineering
Ng, Che Tean
Synthesis of Fe3O4@TiO2 core-shell structure for effective particle-fluid separation after photocatalytic process
description The usage of TiO2 photocatalysts inside liquid medium is facing a great challenge on difficulty and cost inefficient to be collected and reused by micro- or nano-filtration. Aiming to solve some disadvantages of TiO2 photocatalyst, a facile and effective synthesis method has been successfully developed to produce Fe3O4@TiO2 Core-Shell structure with magnetic Fe3O4 as cores and anatase TiO2 as shells. Firstly, the magnetite core nanoparticles were synthesized via low temperature oxidative hydrolysis method. During synthesis, the Fe3O4 colloidal dispersion was stabilized by a surfactant called Cetyl trimethylammonium bromide (CTAB), which serves to control the particle size and enhance the particle dispersion. On the synthesized Fe3O4 particles, a layer of TiO2 was in-situ formed, followed by heat treatment at three different temperatures to form the Fe3O4@TiO2 core-shell microspheres. Different characterization methods such as Scanning Electron Microscopy (SEM), X-ray Diffraction (XRD), Zeta Potential and Particle Size Analyzer, and Solar Simulator were used to analyze the synthesized products at different experimental stages. The results show that the core-shell structured particles exhibit sensitive response to an external applying magnetic field, thus the product is a promising candidate as a magnetic recoverable catalyst. Meanwhile, the visible light response of this Fe3O4@TiO2 Core-Shell structure was investigated by using Rhodamine B (RhB) solution illuminated under visible light in a solar simulator. The corresponding results show significant enhanced photoresponse to visible light compared to pure TiO2 photocatalyst, which serves as an evidence on the reduction in bandgap energy. Furthermore, the synthesized core-shell microspheres show high photocatalytic efficiency and have potential to be used in recoverable applications in waste water treatment with the help of magnetic separation.
author2 Dong Zhili
author_facet Dong Zhili
Ng, Che Tean
format Final Year Project
author Ng, Che Tean
author_sort Ng, Che Tean
title Synthesis of Fe3O4@TiO2 core-shell structure for effective particle-fluid separation after photocatalytic process
title_short Synthesis of Fe3O4@TiO2 core-shell structure for effective particle-fluid separation after photocatalytic process
title_full Synthesis of Fe3O4@TiO2 core-shell structure for effective particle-fluid separation after photocatalytic process
title_fullStr Synthesis of Fe3O4@TiO2 core-shell structure for effective particle-fluid separation after photocatalytic process
title_full_unstemmed Synthesis of Fe3O4@TiO2 core-shell structure for effective particle-fluid separation after photocatalytic process
title_sort synthesis of fe3o4@tio2 core-shell structure for effective particle-fluid separation after photocatalytic process
publishDate 2014
url http://hdl.handle.net/10356/55684
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