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العنوان
Kinetic studies of the photocatalytic treatment of
wastewater using novel nanoparticles /
المؤلف
El-Sayed,Mahmoud Adel Hamza.
هيئة الاعداد
باحث / Mahmoud Adel Hamza El-Sayed
مشرف / Hesham Ahmed Ali Madian
مشرف / Zeinab Mohamed Ahmed Abou-Gamra
مشرف / Mohamed Abd El-hay Ahmed Ismail
تاريخ النشر
2018
عدد الصفحات
215p.;
اللغة
الإنجليزية
الدرجة
ماجستير
التخصص
Physical and Theoretical Chemistry
تاريخ الإجازة
1/1/2018
مكان الإجازة
جامعة عين شمس - كلية العلوم - الكيمياء الفيزيائية
الفهرس
Only 14 pages are availabe for public view

from 215

from 215

Abstract

Our world extremely suffers from pollution due to urgent need
to industry and discharge of factories waste, so most of scientific
researches are concerned in solving this crisis. In the last decades,
semiconductor-assisted photocatalysis was intensively studied as a
‘green’ method for wastewater treatment.
Titanium dioxide (TiO2) is one of the most important
photocatalysts due to its non-toxicity, availability, stability and
excellent photocatalytic performance. Unfortunately, it has two
major disadvantages: its rapid electron-hole recombination rate
causing decreasing of its photocatalytic efficiency and its large
band gap energy (3.2 eV for pure anatase) causing excluding its
activity only under UV irradiation which represents only 2–3% of
whole solar-light spectrum.
Several techniques are used to overcome these disadvantages
such as metal doping, non-metal doping, co-doping and dye
sensitization using rose bengal, curcumin, phthalocyanine,
porphyrins and metal porphyrins. Porphyrins are intensively
colored materials that characterized by their strong absorption in
the whole visible range.
In the first part of this study, tetra (4-carboxyphenyl) porphyrin
(TCPP) was prepared by simple one-pot synthesis to be used as a
visible antenna for TiO2 nanoparticles that were prepared via
simple template-free sol-gel method. Various loading percentages of TCPP (0.05-1%) were incorporated as photosensitizer on the
surface of TiO2 for photocatalytic degradation of Rhodamine B
(RB) dye as a primary pollutant model for optimization TCPP%.
For TiO2 nanoparticles sensitized with optimum TCPP%, the
different parameters affecting the photodegradation of RB dye such
as catalyst dose, dye concentration and pH were studied. Also, the
effect of scavengers was studied to indicate the nature of reactive
species of the catalyst and the mechanism of the photodegradation
of RB using TCPP-TiO2 was suggested.
In the second part of this study, TiO2 nanoparticles were
prepared using template-assisted sol-gel method using various
templates such as Tween 80 (T80), Octaldecylamine (ODA),
Cetyltrimethylammonium bromide (CTAB) and
polyvinylpyrrolidone (PVP). Among these templates, T80-
templated TiO2 nanoparticles were the most reactive sample toward
the photodegradation of RB. Then, different concentrations of
T80/isopropanol solutions (0-50%) were utilized in a modified
template-assisted sol-gel method. The concentration of T80
(T80%) was found to affect the whole physical properties such as
crystalline parameters, optical properties, micromorphology,
nanomorphology, surface area and photocatalytic activities of
Tween 80 templated TiO2 nanoparticles. Finally, TCPP was
anchored on the surface of T80-TiO2 nanoparticles to act as a visible antenna to enhance its photocatalytic activity toward the
visible light region.
The skeleton of the thesis is divided into four main chapters:
 Chapter 1: Introduction
This chapter explore the crisis of water pollution and its
severe effect on the human health. Also, this chapter explore
the traditional and advanced methods of waste water
treatment. At the end of this chapter, a recent literature
survey at the scope of the thesis was presented.
 Chapter 2: Experimental
This chapter presents a detailed description of the materials,
equipment and the various experimental techniques used in
the preparation, characterization and application of the
prepared catalysts.
 Chapter 3: Results and discussion
This chapter contains the detailed interpretation of all the
experimental results of physicochemical characterization of
the prepared materials and their application in the
photodegradation process
 Chapter 4: Conclusion and future trends
This chapter summarize the main conclusion of the
experimental work and explore our future scope and trends.
 Appendix 1: Kinetic data This appendix contains all the detailed kinetic tables and
graphs of the photodegradation experiments that performed
during the experimental work of the thesis.
 Appendix 2: Published articles
This appendix contains the print form of the published paper
” Effect of porphyrin on photocatalytic activity of TiO2
nanoparticles toward Rhodamine B photodegradation” at the
Journal of Photochemistry & Photobiology, B: Biology 176
(2017) 25–35.