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Artificial Photosynthesis: Photocatalytic Conversion of CO2 into Hydrocarbon Fuels

Title
Artificial Photosynthesis: Photocatalytic Conversion of CO2 into Hydrocarbon Fuels
Translated Title
인공광합성: 광화학적 이산화탄소의 탄화수소 연료로의 전환
Authors
Kim, Hye Rim
DGIST Authors
Kim, Hye Rim; In, Su Il; Lee, Soo Keun
Advisor(s)
In, Su Il
Co-Advisor(s)
Lee, Soo Keun
Issue Date
2014
Available Date
2016-05-18
Degree Date
2014. 8
Type
Thesis
Keywords
PhotocatalystCarbon dioxide conversionArtificial photosynthesisPhotoreactorTandem CuOTiO2 nanostructure.광촉매이산화탄소 전환인공광합성광반응기텐덤형 CuO-TiO2 나노구조
Abstract
One of the major problems concerning environmental pollution and global warming is a rapid escalation in the level of carbon dioxide in atmosphere.The atmospheric CO2 level can be reduced by converting it into useful products via thermochemical and photochemical processes. Amongst these conversion processes, the photochemical conversion is an environment effective and preferred process for the photoreduction of CO2 into useful liquid fuels like methanol, formaldehyde, and methane gas. Photoreduction of CO2 into hydrocarbon fuels on the surface of photocatalyst is one of the breakthroughs in the field of photocatalysis. At present various approaches have been investigated with the aim of increasing the CO2 conversion efficiency. The reactor for photoconversion of CO2 plays a vital role in experimental setup. In first study an attempt was made to testify a newly designed the photoreactor for conversion of CO2 into useful products. The photoreactor was specifically designed for simple operation bearing features of temperature and pressure control. The reactor has been tested successively with the standard titania, Degussa P25 yielding methane with moderate production rate of 1007 μmol·g-1·h-1 (16.11 ppm·g-1·h-1). under UVB lamp (λmax = 365 nm). The methane yield obtained is comparable to the values reported in literature. In second study, CuO-TiO2 nanostructure, a hybrid material photocatalyst was synthesized and tested for CO2 photoreduction. The synthesis process involves the formation CuS nanostructure using electrochemical anodization followed by embedment of titanium isopropoxide as Ti precursor. The oxidation of the nanosctuctre is performed at temperature of 400 °C oxidizing Cu and Ti to form CuO-TiO2 nanostructures. ⓒ 2014 DGIST
Table Of Contents
1. INTRODUCTION 1 -- 1.1 Background 1 -- 1.2 Photocatalytic CO2 Conversion 1 -- 1.3 Electrochemical Anodization 2 -- 2. RESEARCH EQIUPMENT 3 -- 2.1 X-Ray Diffractometer (XRD) 3 -- 2.2 X-ray Photoelectron Spectrometer (XPS) 4 -- 2.3 Scanning Electron Microscope (SEM) 5 -- 2.4 Transmission Electron Microscope (TEM) 6 -- 3. Photocatalytic conversion of CO2 into hydrocarbon fuels with standard titania (Degussa P25) using newly installed experimental setup 7 -- 3.1 Introduction 7 -- 3.2 Method 8 -- 3.3 Results and Discussion 11 -- 4. Development of a Tandem TiO2 Photocatalyst Covered with CuO nanorods Layer for Highrate Solar Photoctalytic CO2 Conversion to Hydrocarbon Fuels 12 -- 4.1 Introduction 12 -- 4.2 Method 13 -- 4.3 Results and Discussion 15 -- 5. CONCLUSIONS 23
URI
http://dgist.dcollection.net/jsp/common/DcLoOrgPer.jsp?sItemId=000002262508
http://hdl.handle.net/20.500.11750/1371
DOI
10.22677/thesis.2262508
Degree
Master
Department
Energy Systems Engineering
University
DGIST
Files:
Collection:
Energy Science and EngineeringThesesMaster


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