Main Page
Deanship
The Dean
Dean's Word
Curriculum Vitae
Contact the Dean
Vision and Mission
Organizational Structure
Vice- Deanship
Vice- Dean
KAU Graduate Studies
Research Services & Courses
Research Services Unit
Important Research for Society
Deanship's Services
FAQs
Research
Staff Directory
Files
Favorite Websites
Deanship Access Map
Graduate Studies Awards
Deanship's Staff
Staff Directory
Files
Researches
Contact us
عربي
English
About
Admission
Academic
Research and Innovations
University Life
E-Services
Search
Deanship of Graduate Studies
Document Details
Document Type
:
Thesis
Document Title
:
PHOTOCATALYTIC REDUCTION OF CO2 PRESENT IN WATER TO METHANOL USING NANOSIZED SEMICONDUCTORS
الاختزال الضوئي التحفيزي لثاني أكسيد الكربون الموجود بالماء الى ميثانول باستخدام أشباه الموصلات نانونية الحجم
Subject
:
Faculty of Marine Sciences
Document Language
:
Arabic
Abstract
:
Development of an efficient method to convert CO2 to fuel using renewable energy could replace crude oil without increasing CO2 emission and provide high-density energy storage reservoir similar to liquid fuel or batteries. In this study, an attempt has made to develop a photocatalyst, Cu-doped C/TiO2, which is capable of reducing CO2 into a useful fuel, which can help in lowering the global warming and energy crisis simultaneously. Photocatalytic reduction of carbon dioxide into methanol has been investigated in distilled water, sea water, and polluted seawater by using Cu-loaded carbon-modified titanium oxide (Cu-C/TiO2) nanoparticles under irradiation of UV and natural sunlight. Cu-C/TiO2 nanoparticles were prepared by sonicated sol–gel method. The synthesized photocatalyst exhibited maximum catalytic activity at the optimum dosage of 1.0 g L-1 of Cu-C/TiO2 having 3 wt% Cu content, giving maximum methanol yields of 2593 and 885 µmol g-1 after 5 h of illumination under UV and natural sunlight, respectively in the distilled water medium. The observed yield of methanol in seawater was 2885 and 940 µmol g-1 after 5 h of illumination under UV and natural sunlight, respectively. The polluted seawater showing the yield depending on its background hydrographic parameters. We assessed two types of polluted seawater system, the observed yield was to be 2910 and 990 µmol g-1 after 5 h of illumination under UV and natural sunlight respectively in system 1 and the corresponding yield in system 2 was 2250 and 910 µmol g-1 after 5 h of illumination. The results indicated that the methanol yield produced by Cu-C/TiO2 was much higher than those of carbon-modified titanium oxide (C/TiO2) and Degussa (P25-TiO2). This improvement was attributed to the reduced optical bandgap energy by C-modification, hindered electron-hole recombination by Cu-loading and the enhanced catalytic activity and selectivity of Cu for the reduction of CO2 specifically to methanol.
Supervisor
:
Dr. Yasser A. Shaban
Thesis Type
:
Doctorate Thesis
Publishing Year
:
1440 AH
2018 AD
Added Date
:
Tuesday, December 11, 2018
Researchers
Researcher Name (Arabic)
Researcher Name (English)
Researcher Type
Dr Grade
Email
يسار نيليوت كافيل
Kavil, Yasar Nelliyot
Researcher
Doctorate
Files
File Name
Type
Description
43856.pdf
pdf
Back To Researches Page