The simultaneous adsorption and photocatalytic degradation of phenol using electrospun p(3HB)-TiO2 nanocomposite fibers

Photocatalytic degradation and adsorption of crude oil on poly-3-hydroxybutyrate P(3HB) electrospun nanofiber immobilized with nanosized titanium dioxide (TiO2) for phenol cleanup was evaluated in this study. The P(3HB) used in this study which is made from renewable sources is cost effective and bi...

Full description

Saved in:
Bibliographic Details
Main Author: Jasni, Ainil Hawa
Format: Thesis
Language:English
English
Published: 2016
Subjects:
Online Access:http://ir.upnm.edu.my/id/eprint/91/1/THE%20SIMULTANEOUS%20ADSORPTION%20%2825%29.pdf
http://ir.upnm.edu.my/id/eprint/91/2/THE%20SIMULTANEOUS%20ADSORPTION%20%28Full%29.pdf
Tags: Add Tag
No Tags, Be the first to tag this record!
id my-upnm-ir.91
record_format uketd_dc
spelling my-upnm-ir.912023-01-16T03:27:06Z The simultaneous adsorption and photocatalytic degradation of phenol using electrospun p(3HB)-TiO2 nanocomposite fibers 2016-11-02 Jasni, Ainil Hawa Q Science (General) QH301 Biology Photocatalytic degradation and adsorption of crude oil on poly-3-hydroxybutyrate P(3HB) electrospun nanofiber immobilized with nanosized titanium dioxide (TiO2) for phenol cleanup was evaluated in this study. The P(3HB) used in this study which is made from renewable sources is cost effective and biodegradable. It is hydrophobic and thus was proven to show simultaneous adsorption of phenol while TiO2 photocatalytically degrades the adsorbed phenol molecules. Objectives: This study aims to develop a nanocomposite fibrous material using the environmentally friendly PHA and inert TiO2 to simultaneously adsorb and degrade phenol. Methodology: Palm oil based sources of palm olein (PO), crude palm kernel oil (CPKO), waste cooking oil (WCO) had been used in this study to produce poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) [P(3HB-co-3HHx) bioplastics from wild type Cupriavidus necator and recombinant Cupriavidus necator Re2058/pCB113. Meanwhile, P(3HB) homopolymer was extracted from mice pellets (mice fed with lyophilized cells of C. necator H16 containing 39 wt% PHB). Kaneka Commercial P(3HB-co-3HHx) with 11.8% and 8.4% of 3HHx monomer composition were used as comparison. Different applied voltages, polymer concentrations and mixed solvent ratios were tested and optimized for the fabrication of electrospun nanofiber. Electrospun P(3HB)-TiO2 films were successfully fabricated and were used in adsorption studies. Phenol was used as crude oil model as it is organic and stable. The fabricated nanofibers were characterized by FESEM, EDX, DSC, GPC and TGA and used for degradation of phenol under different parameters of contact time, pH, initial concentration, temperature and light condition. Results: It is apparent that high electrospinning voltage of 25kV produced homogenous strands and better fibrous networks of the nanocomposite films. The intrusion rate of electrospinning was found to be optimum at 40 µL/min, meanwhile the concentration of polymer solution for electrospinning was set at 10 wt. % for all sample types. The maximum adsorption capacities was 59.047 mg/g. Langmuir and Freundlich isotherm models had been generated to provide reasonable fittings for this sorption data of oil and the sorbent. The trend of adsorptions were in a good agreement with Freundlich which R2= 0.99. The optimal contact time was 270 minutes of nearly 99.9% phenol removal. The equilibrium time was 10 minutes. The effects of photocatalyst-TiO2 loading on the rates of photocatalytic degradation of phenol had increased in four different light conditions: solar>UV>fluorescent>dark. The experimental results illustrate that the kinetics of degradation of phenol are pseudo-2nd order. Phenol was effectively removed at pH 4 and at 60 0C and higher. Conclusion: In view of the results, the P(3HB)-TiO2 nanocomposite films were proven to act as an effective material to simultaneously adsorb and degrade phenol in aquatic environment. 2016-11 Thesis http://ir.upnm.edu.my/id/eprint/91/ http://ir.upnm.edu.my/id/eprint/91/1/THE%20SIMULTANEOUS%20ADSORPTION%20%2825%29.pdf text en public http://ir.upnm.edu.my/id/eprint/91/2/THE%20SIMULTANEOUS%20ADSORPTION%20%28Full%29.pdf text en validuser mphil masters Universiti Pertahanan Nasional Malaysia Faculty of Defence Science & Technology
institution Universiti Pertahanan Nasional Malaysia
collection UPNM Institutional Repository
language English
English
topic Q Science (General)
QH301 Biology
spellingShingle Q Science (General)
QH301 Biology
Jasni, Ainil Hawa
The simultaneous adsorption and photocatalytic degradation of phenol using electrospun p(3HB)-TiO2 nanocomposite fibers
description Photocatalytic degradation and adsorption of crude oil on poly-3-hydroxybutyrate P(3HB) electrospun nanofiber immobilized with nanosized titanium dioxide (TiO2) for phenol cleanup was evaluated in this study. The P(3HB) used in this study which is made from renewable sources is cost effective and biodegradable. It is hydrophobic and thus was proven to show simultaneous adsorption of phenol while TiO2 photocatalytically degrades the adsorbed phenol molecules. Objectives: This study aims to develop a nanocomposite fibrous material using the environmentally friendly PHA and inert TiO2 to simultaneously adsorb and degrade phenol. Methodology: Palm oil based sources of palm olein (PO), crude palm kernel oil (CPKO), waste cooking oil (WCO) had been used in this study to produce poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) [P(3HB-co-3HHx) bioplastics from wild type Cupriavidus necator and recombinant Cupriavidus necator Re2058/pCB113. Meanwhile, P(3HB) homopolymer was extracted from mice pellets (mice fed with lyophilized cells of C. necator H16 containing 39 wt% PHB). Kaneka Commercial P(3HB-co-3HHx) with 11.8% and 8.4% of 3HHx monomer composition were used as comparison. Different applied voltages, polymer concentrations and mixed solvent ratios were tested and optimized for the fabrication of electrospun nanofiber. Electrospun P(3HB)-TiO2 films were successfully fabricated and were used in adsorption studies. Phenol was used as crude oil model as it is organic and stable. The fabricated nanofibers were characterized by FESEM, EDX, DSC, GPC and TGA and used for degradation of phenol under different parameters of contact time, pH, initial concentration, temperature and light condition. Results: It is apparent that high electrospinning voltage of 25kV produced homogenous strands and better fibrous networks of the nanocomposite films. The intrusion rate of electrospinning was found to be optimum at 40 µL/min, meanwhile the concentration of polymer solution for electrospinning was set at 10 wt. % for all sample types. The maximum adsorption capacities was 59.047 mg/g. Langmuir and Freundlich isotherm models had been generated to provide reasonable fittings for this sorption data of oil and the sorbent. The trend of adsorptions were in a good agreement with Freundlich which R2= 0.99. The optimal contact time was 270 minutes of nearly 99.9% phenol removal. The equilibrium time was 10 minutes. The effects of photocatalyst-TiO2 loading on the rates of photocatalytic degradation of phenol had increased in four different light conditions: solar>UV>fluorescent>dark. The experimental results illustrate that the kinetics of degradation of phenol are pseudo-2nd order. Phenol was effectively removed at pH 4 and at 60 0C and higher. Conclusion: In view of the results, the P(3HB)-TiO2 nanocomposite films were proven to act as an effective material to simultaneously adsorb and degrade phenol in aquatic environment.
format Thesis
qualification_name Master of Philosophy (MPhil)
qualification_level Master's degree
author Jasni, Ainil Hawa
author_facet Jasni, Ainil Hawa
author_sort Jasni, Ainil Hawa
title The simultaneous adsorption and photocatalytic degradation of phenol using electrospun p(3HB)-TiO2 nanocomposite fibers
title_short The simultaneous adsorption and photocatalytic degradation of phenol using electrospun p(3HB)-TiO2 nanocomposite fibers
title_full The simultaneous adsorption and photocatalytic degradation of phenol using electrospun p(3HB)-TiO2 nanocomposite fibers
title_fullStr The simultaneous adsorption and photocatalytic degradation of phenol using electrospun p(3HB)-TiO2 nanocomposite fibers
title_full_unstemmed The simultaneous adsorption and photocatalytic degradation of phenol using electrospun p(3HB)-TiO2 nanocomposite fibers
title_sort simultaneous adsorption and photocatalytic degradation of phenol using electrospun p(3hb)-tio2 nanocomposite fibers
granting_institution Universiti Pertahanan Nasional Malaysia
granting_department Faculty of Defence Science & Technology
publishDate 2016
url http://ir.upnm.edu.my/id/eprint/91/1/THE%20SIMULTANEOUS%20ADSORPTION%20%2825%29.pdf
http://ir.upnm.edu.my/id/eprint/91/2/THE%20SIMULTANEOUS%20ADSORPTION%20%28Full%29.pdf
_version_ 1813223590851510272