Polysulfone Photocatalys Membrane Effects Of Catalyst Polymeric Additives And Molecular Imprint For Selective Filtration And Photodegradation

Photocatalytic membranes exhibit great potential for wastewater treatment since they can combine filtration and photo degradation in a single unit. In this work, 2 wt % poly(vinyl alcohol) (PVA) and polyvinyl pyrrolidone (PVP) were used to stabilize 2 wt % of photocatalytic nanoparticles (TiO2, Mn-T...

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Main Author:	Melvin, Ng Hau Kwan
Format:	Thesis
Language:	English
Published:	2017
Subjects:	T Technology TP155-156 Chemical engineering
Online Access:	http://eprints.usm.my/47208/1/Polysulfone%20Photocatalys%20Membrane%20Effects%20Of%20Catalyst%20Polymeric%20Additives%20And%20Molecular%20Imprint%20For%20Selective%20Filtration%20And%20Photodegradation.pdf
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spelling	my-usm-ep.472082021-11-17T03:42:15Z Polysulfone Photocatalys Membrane Effects Of Catalyst Polymeric Additives And Molecular Imprint For Selective Filtration And Photodegradation 2017-07-01 Melvin, Ng Hau Kwan T Technology TP155-156 Chemical engineering Photocatalytic membranes exhibit great potential for wastewater treatment since they can combine filtration and photo degradation in a single unit. In this work, 2 wt % poly(vinyl alcohol) (PVA) and polyvinyl pyrrolidone (PVP) were used to stabilize 2 wt % of photocatalytic nanoparticles (TiO2, Mn-TiO2 and ZnO) blended into polysulfone (PSf) membrane before phase inversion. These additives affect the formation of finger-like pores as shown in the SEM images. Blending PVA and photocatalysts into PSf membrane resulted in significant improvement of humic acid (HA) rejection. The incorporation of PVP and photocatalysts into PSf membrane caused great improvement in water permeability, about 15.5~18.1 times higher than pure PSf membrane. Membranes with excellent rejection and permeation were further examined in photodegradation test, where PSf/PVP/photocatalyst showing < 15 % reduction in their photodegradation in comparison to the free nanoparticles. Pure TiO2 nanoparticles was further modified using molecular imprinting polymer (MIP-TiO2) before blending into PSf membrane. MIP-TiO2 achieved a photodegradation selectivity of methylene blue/methylene orange (MB/MO) up to 2.06 under UV irradiation for 1 h. MIP-TiO2 could be used in long duration (2 h) and up to 5 cycles of photocatalytic degradation with MB/MO selectivity of 2.16. The blending of MIP-TiO2 into PSf/PVP/MIP-TiO2 membrane further enhanced permeate flux up to 14.08 L/m2.h.bar, while retaining the major foulant MB with a selectivity of 2.83 under UV. 2017-07 Thesis http://eprints.usm.my/47208/ http://eprints.usm.my/47208/1/Polysulfone%20Photocatalys%20Membrane%20Effects%20Of%20Catalyst%20Polymeric%20Additives%20And%20Molecular%20Imprint%20For%20Selective%20Filtration%20And%20Photodegradation.pdf application/pdf en public masters Universiti Sains Malaysia Pusat Pengajian Kejuruteraan Kimia
institution	Universiti Sains Malaysia
collection	USM Institutional Repository
language	English
topic	T Technology TP155-156 Chemical engineering
spellingShingle	T Technology TP155-156 Chemical engineering Melvin, Ng Hau Kwan Polysulfone Photocatalys Membrane Effects Of Catalyst Polymeric Additives And Molecular Imprint For Selective Filtration And Photodegradation
description	Photocatalytic membranes exhibit great potential for wastewater treatment since they can combine filtration and photo degradation in a single unit. In this work, 2 wt % poly(vinyl alcohol) (PVA) and polyvinyl pyrrolidone (PVP) were used to stabilize 2 wt % of photocatalytic nanoparticles (TiO2, Mn-TiO2 and ZnO) blended into polysulfone (PSf) membrane before phase inversion. These additives affect the formation of finger-like pores as shown in the SEM images. Blending PVA and photocatalysts into PSf membrane resulted in significant improvement of humic acid (HA) rejection. The incorporation of PVP and photocatalysts into PSf membrane caused great improvement in water permeability, about 15.5~18.1 times higher than pure PSf membrane. Membranes with excellent rejection and permeation were further examined in photodegradation test, where PSf/PVP/photocatalyst showing < 15 % reduction in their photodegradation in comparison to the free nanoparticles. Pure TiO2 nanoparticles was further modified using molecular imprinting polymer (MIP-TiO2) before blending into PSf membrane. MIP-TiO2 achieved a photodegradation selectivity of methylene blue/methylene orange (MB/MO) up to 2.06 under UV irradiation for 1 h. MIP-TiO2 could be used in long duration (2 h) and up to 5 cycles of photocatalytic degradation with MB/MO selectivity of 2.16. The blending of MIP-TiO2 into PSf/PVP/MIP-TiO2 membrane further enhanced permeate flux up to 14.08 L/m2.h.bar, while retaining the major foulant MB with a selectivity of 2.83 under UV.
format	Thesis
qualification_level	Master's degree
author	Melvin, Ng Hau Kwan
author_facet	Melvin, Ng Hau Kwan
author_sort	Melvin, Ng Hau Kwan
title	Polysulfone Photocatalys Membrane Effects Of Catalyst Polymeric Additives And Molecular Imprint For Selective Filtration And Photodegradation
title_short	Polysulfone Photocatalys Membrane Effects Of Catalyst Polymeric Additives And Molecular Imprint For Selective Filtration And Photodegradation
title_full	Polysulfone Photocatalys Membrane Effects Of Catalyst Polymeric Additives And Molecular Imprint For Selective Filtration And Photodegradation
title_fullStr	Polysulfone Photocatalys Membrane Effects Of Catalyst Polymeric Additives And Molecular Imprint For Selective Filtration And Photodegradation
title_full_unstemmed	Polysulfone Photocatalys Membrane Effects Of Catalyst Polymeric Additives And Molecular Imprint For Selective Filtration And Photodegradation
title_sort	polysulfone photocatalys membrane effects of catalyst polymeric additives and molecular imprint for selective filtration and photodegradation
granting_institution	Universiti Sains Malaysia
granting_department	Pusat Pengajian Kejuruteraan Kimia
publishDate	2017
url	http://eprints.usm.my/47208/1/Polysulfone%20Photocatalys%20Membrane%20Effects%20Of%20Catalyst%20Polymeric%20Additives%20And%20Molecular%20Imprint%20For%20Selective%20Filtration%20And%20Photodegradation.pdf
_version_	1747821755236352000

Polysulfone Photocatalys Membrane Effects Of Catalyst Polymeric Additives And Molecular Imprint For Selective Filtration And Photodegradation

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