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Deposition of synthesized zirconium-based metal organic framework on ceramic hollow fibre for forward osmosis desalination

This study was aimed to develop zirconium (Zr)-based metal organic framework (MOF) ceramic membrane that can be used for forward osmosis (FO) desalination. As the first step, ceramic substrate surface was first modified with zirconium dioxide (ZrO2) using sol-gel Pechini’s method to provide active s...

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Main Author: Yahaya, Nur Zhatul Shima
Format: Thesis
Language:English
Published: 2020
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TP Chemical technology
Online Access:http://eprints.utm.my/id/eprint/92075/1/NurZhatulShimaMSChE2020.pdf
http://eprints.utm.my/id/eprint/92075/
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spelling my.utm.920752021-08-30T05:09:59Z http://eprints.utm.my/id/eprint/92075/ Deposition of synthesized zirconium-based metal organic framework on ceramic hollow fibre for forward osmosis desalination Yahaya, Nur Zhatul Shima TP Chemical technology This study was aimed to develop zirconium (Zr)-based metal organic framework (MOF) ceramic membrane that can be used for forward osmosis (FO) desalination. As the first step, ceramic substrate surface was first modified with zirconium dioxide (ZrO2) using sol-gel Pechini’s method to provide active seeds that can favour MOF nucleation. Using this modified substrate, a series of solvothermal synthesis conditions were tested to build the FO applicable membrane. In the unmodulated procedure, only sample synthesized at 220°C with 0.3 M and 16 h gave positive water flux. Field emission scanning electron microscopy (FESEM) and themogravimetric analysis (TGA) results have shown that the non-uniform coverage and defect frameworks of MIL-140B (Materials of Institute Lavoisier –MIL) on the substrate layer was the cause to this problem. Hence, to tune the defect, modulated synthesis was introduced. Increment in modulator amount by increasing precursor concentration from 0.58 M to 2.32 M had successfully lowered the percentage of defect framework from 26.03% to 16.87%. Despite this framework enhancement, FO test result of this sample still displayed worse performance than the previous synthesis due to its high tendency of agglomeration. Loosely joint particles that formed during agglomeration at high temperature synthesis were easily brushed off during FO test. Therefore, lower synthesis temperature of 120°C and longer synthesis time of 24 h was employed in the next procedure to allow slow nucleation process that can form better connected crystals. Instead of MIL-140B, UiO-66-NDC (University of Oslo – UiO) framework was found at 2? = 10.36° and the crystal shape appeared in octahedron. Even with this reformatted crystal shape, the FO performance result still could not be in positive value. Therefore, the UiO-66-NDC membrane active layer was polymerised with fluorinated polymer as the last resort. Integration between this polymer and UiO-66-NDC had successfully treated the membrane defects by building new bonds inside the framework as proven by FESEM, atomic force microscopy, xray diffraction, Fourier-transform infrared spectroscopy and TGA results. With better connected crystals, smoother deposition layer and perfect frameworks, FO performance of all UiO-66-NDC samples finally gave positive water flux results and the highest value was 16.189 L/m2.h. Its lowest reverse solute flux achieved was 0.003 L/m2.h with sodium chloride rejection of up to 80 % which is definitely better than the previous study. Therefore, polymer-synthesized UiO-66-NDC on ceramic hollow fibre can definitely serve as an excellent FO membrane option that can be used in the desalination process. 2020 Thesis NonPeerReviewed application/pdf en http://eprints.utm.my/id/eprint/92075/1/NurZhatulShimaMSChE2020.pdf Yahaya, Nur Zhatul Shima (2020) Deposition of synthesized zirconium-based metal organic framework on ceramic hollow fibre for forward osmosis desalination. Masters thesis, Universiti Teknologi Malaysia, Faculty of Engineering - School of Chemical & Energy Engineering. http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:139322
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
language English
topic TP Chemical technology
spellingShingle TP Chemical technology
Yahaya, Nur Zhatul Shima
Deposition of synthesized zirconium-based metal organic framework on ceramic hollow fibre for forward osmosis desalination
description This study was aimed to develop zirconium (Zr)-based metal organic framework (MOF) ceramic membrane that can be used for forward osmosis (FO) desalination. As the first step, ceramic substrate surface was first modified with zirconium dioxide (ZrO2) using sol-gel Pechini’s method to provide active seeds that can favour MOF nucleation. Using this modified substrate, a series of solvothermal synthesis conditions were tested to build the FO applicable membrane. In the unmodulated procedure, only sample synthesized at 220°C with 0.3 M and 16 h gave positive water flux. Field emission scanning electron microscopy (FESEM) and themogravimetric analysis (TGA) results have shown that the non-uniform coverage and defect frameworks of MIL-140B (Materials of Institute Lavoisier –MIL) on the substrate layer was the cause to this problem. Hence, to tune the defect, modulated synthesis was introduced. Increment in modulator amount by increasing precursor concentration from 0.58 M to 2.32 M had successfully lowered the percentage of defect framework from 26.03% to 16.87%. Despite this framework enhancement, FO test result of this sample still displayed worse performance than the previous synthesis due to its high tendency of agglomeration. Loosely joint particles that formed during agglomeration at high temperature synthesis were easily brushed off during FO test. Therefore, lower synthesis temperature of 120°C and longer synthesis time of 24 h was employed in the next procedure to allow slow nucleation process that can form better connected crystals. Instead of MIL-140B, UiO-66-NDC (University of Oslo – UiO) framework was found at 2? = 10.36° and the crystal shape appeared in octahedron. Even with this reformatted crystal shape, the FO performance result still could not be in positive value. Therefore, the UiO-66-NDC membrane active layer was polymerised with fluorinated polymer as the last resort. Integration between this polymer and UiO-66-NDC had successfully treated the membrane defects by building new bonds inside the framework as proven by FESEM, atomic force microscopy, xray diffraction, Fourier-transform infrared spectroscopy and TGA results. With better connected crystals, smoother deposition layer and perfect frameworks, FO performance of all UiO-66-NDC samples finally gave positive water flux results and the highest value was 16.189 L/m2.h. Its lowest reverse solute flux achieved was 0.003 L/m2.h with sodium chloride rejection of up to 80 % which is definitely better than the previous study. Therefore, polymer-synthesized UiO-66-NDC on ceramic hollow fibre can definitely serve as an excellent FO membrane option that can be used in the desalination process.
format Thesis
author Yahaya, Nur Zhatul Shima
author_facet Yahaya, Nur Zhatul Shima
author_sort Yahaya, Nur Zhatul Shima
title Deposition of synthesized zirconium-based metal organic framework on ceramic hollow fibre for forward osmosis desalination
title_short Deposition of synthesized zirconium-based metal organic framework on ceramic hollow fibre for forward osmosis desalination
title_full Deposition of synthesized zirconium-based metal organic framework on ceramic hollow fibre for forward osmosis desalination
title_fullStr Deposition of synthesized zirconium-based metal organic framework on ceramic hollow fibre for forward osmosis desalination
title_full_unstemmed Deposition of synthesized zirconium-based metal organic framework on ceramic hollow fibre for forward osmosis desalination
title_sort deposition of synthesized zirconium-based metal organic framework on ceramic hollow fibre for forward osmosis desalination
publishDate 2020
url http://eprints.utm.my/id/eprint/92075/1/NurZhatulShimaMSChE2020.pdf
http://eprints.utm.my/id/eprint/92075/
http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:139322
_version_ 1709667381028061184
score 13.211869

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