Synthesis And Characterization Of Titanium Dioxide Nanotubes For Sonocatalytic Degradation Of Organic Dyes In Wastewater

The sonocatalytic degradation of Rhodamine B was studied using titanium dioxide nanotubes (TiO2 NTs) with various annealing temperatures ranging from 300 oC to 900 oC for 2 h. Characterizations of the catalysts were performed using SEM, TEM, EDX, EA, AAS, XRD, Raman spectroscopy, FT-IR, nitrogen ads...

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Main Author:	Pang, Yean Ling
Format:	Thesis
Language:	English
Published:	2013
Subjects:	TP1-1185 Chemical technology
Online Access:	http://eprints.usm.my/45194/1/Pang%20Yean%20Ling24.pdf
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spelling	my-usm-ep.451942019-08-05T06:59:58Z Synthesis And Characterization Of Titanium Dioxide Nanotubes For Sonocatalytic Degradation Of Organic Dyes In Wastewater 2013-07 Pang, Yean Ling TP1-1185 Chemical technology The sonocatalytic degradation of Rhodamine B was studied using titanium dioxide nanotubes (TiO2 NTs) with various annealing temperatures ranging from 300 oC to 900 oC for 2 h. Characterizations of the catalysts were performed using SEM, TEM, EDX, EA, AAS, XRD, Raman spectroscopy, FT-IR, nitrogen adsorption-desorption, UV-vis DRS, TGA-DTA, zeta potential measurement and XPS. The effect of catalytic activity for TiO2 nanoparticles (NPs) or various annealed TiO2 NTs and various experimental parameters including the use of various organic dyes (Congo Red, Reactive Blue 4, Methyl Orange, Methylene Blue and Rhodamine B), initial concentration of Rhodamine B of 50−150 mg/L, catalyst dosage of 0.5−2.5 g/L, solution pH of 1−11, ultrasonic frequency of 35 or 130 kHz, ultrasonic power of 20−100 W, hydrogen peroxide (H2O2) dosage of 4−20 mM, solution temperature of 25−50 oC and the presence of dissolved air at 1 L/min were examined to determine the optimum conditions. The optimum conditions for sonocatalytic degradation of Rhodamine B (88.47 % after 2 h) occurred when the initial concentration of the dye was 50 mg/L, 2 g/L of TiO2 NTs-300, solution pH of 7, ultrasonic power of 50 W, ultrasonic frequency of 35 kHz and H2O2 dosage was 8 mM at 45 oC ± 2. The as-prepared TiO2 NTs was modified by introducing urea on TiO2 NTs at molar ratios of N: Ti between 0.1–1.0. Urea doping at N: Ti equals to 0.3 led to an increment in the sonocatalytic degradation of Rhodamine B up to 86.75 % after 1 h. Meanwhile, Fe-doped TiO2 NTs at molar ratios of Fe: Ti between 0.001−0.02 were prepared. Fe doping at Fe: Ti equals to 0.005 gave the highest sonocatalytic activity (91.19 %) after 1 h. 2013-07 Thesis http://eprints.usm.my/45194/ http://eprints.usm.my/45194/1/Pang%20Yean%20Ling24.pdf application/pdf en public phd doctoral Universiti Sains Malaysia Pusat Pengajian Kejuruteraan Kimia
institution	Universiti Sains Malaysia
collection	USM Institutional Repository
language	English
topic	TP1-1185 Chemical technology
spellingShingle	TP1-1185 Chemical technology Pang, Yean Ling Synthesis And Characterization Of Titanium Dioxide Nanotubes For Sonocatalytic Degradation Of Organic Dyes In Wastewater
description	The sonocatalytic degradation of Rhodamine B was studied using titanium dioxide nanotubes (TiO2 NTs) with various annealing temperatures ranging from 300 oC to 900 oC for 2 h. Characterizations of the catalysts were performed using SEM, TEM, EDX, EA, AAS, XRD, Raman spectroscopy, FT-IR, nitrogen adsorption-desorption, UV-vis DRS, TGA-DTA, zeta potential measurement and XPS. The effect of catalytic activity for TiO2 nanoparticles (NPs) or various annealed TiO2 NTs and various experimental parameters including the use of various organic dyes (Congo Red, Reactive Blue 4, Methyl Orange, Methylene Blue and Rhodamine B), initial concentration of Rhodamine B of 50−150 mg/L, catalyst dosage of 0.5−2.5 g/L, solution pH of 1−11, ultrasonic frequency of 35 or 130 kHz, ultrasonic power of 20−100 W, hydrogen peroxide (H2O2) dosage of 4−20 mM, solution temperature of 25−50 oC and the presence of dissolved air at 1 L/min were examined to determine the optimum conditions. The optimum conditions for sonocatalytic degradation of Rhodamine B (88.47 % after 2 h) occurred when the initial concentration of the dye was 50 mg/L, 2 g/L of TiO2 NTs-300, solution pH of 7, ultrasonic power of 50 W, ultrasonic frequency of 35 kHz and H2O2 dosage was 8 mM at 45 oC ± 2. The as-prepared TiO2 NTs was modified by introducing urea on TiO2 NTs at molar ratios of N: Ti between 0.1–1.0. Urea doping at N: Ti equals to 0.3 led to an increment in the sonocatalytic degradation of Rhodamine B up to 86.75 % after 1 h. Meanwhile, Fe-doped TiO2 NTs at molar ratios of Fe: Ti between 0.001−0.02 were prepared. Fe doping at Fe: Ti equals to 0.005 gave the highest sonocatalytic activity (91.19 %) after 1 h.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Pang, Yean Ling
author_facet	Pang, Yean Ling
author_sort	Pang, Yean Ling
title	Synthesis And Characterization Of Titanium Dioxide Nanotubes For Sonocatalytic Degradation Of Organic Dyes In Wastewater
title_short	Synthesis And Characterization Of Titanium Dioxide Nanotubes For Sonocatalytic Degradation Of Organic Dyes In Wastewater
title_full	Synthesis And Characterization Of Titanium Dioxide Nanotubes For Sonocatalytic Degradation Of Organic Dyes In Wastewater
title_fullStr	Synthesis And Characterization Of Titanium Dioxide Nanotubes For Sonocatalytic Degradation Of Organic Dyes In Wastewater
title_full_unstemmed	Synthesis And Characterization Of Titanium Dioxide Nanotubes For Sonocatalytic Degradation Of Organic Dyes In Wastewater
title_sort	synthesis and characterization of titanium dioxide nanotubes for sonocatalytic degradation of organic dyes in wastewater
granting_institution	Universiti Sains Malaysia
granting_department	Pusat Pengajian Kejuruteraan Kimia
publishDate	2013
url	http://eprints.usm.my/45194/1/Pang%20Yean%20Ling24.pdf
_version_	1747821466377781248

Synthesis And Characterization Of Titanium Dioxide Nanotubes For Sonocatalytic Degradation Of Organic Dyes In Wastewater

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