|
|
| Type |
Symposium |
| Area |
Current Trends in Environmental and Energy Chemistry |
| Room No. |
Room 201B |
| Time |
THU 17:10-: |
| Code |
ENVR1-4 |
| Subject |
Trends and futures of CO2 utilization |
| Authors |
SU IL IN
Department of Energy Science & Engineering, DGIST, Korea |
| Abstract |
Photocatalytic reduction of CO2 to fuel offers an exciting opportunity for helping to solve current energy and global warming problems. Although a number of solar active catalysts have been reported, most of them suffer from low product yield, instability, and low quantum efficiency. Therefore, the design and fabrication of highly active photocatalysts remains an unmet challenge. In this talk we will consider the trend and future work for CO2 utilization. I will introduce how to utilize hydrogen-doped, blue-colored reduced titania for photocatalytic conversion of CO2 into methane (CH4). The photocatalyst is obtained by exposure of TiO2to NaBH4 at 350 °C for 0.5 h. Sensitized with Pt nanoparticles, the material promotes solar spectrum photoconversion of CO2 to CH4 with an apparent quantum yield of 12.40% and a time normalized CH4 generation rate of 80.35 μmol g−1 h−1, which to the best of our knowledge is a record for photocatalytic-based CO2 reduction. The material appears intrinsically stable, with no loss in sample performance over five 6 h cycles, with the sample heated in vacuum after each cycle.
//1. "Efficient Solar Light Photoreduction of CO2 to Hydrocarbon Fuels via Magnesiothermally Reduced TiO2 Photocatalyst", Applied Catalysis B 215 (2017) 28-35
//2. "Synthesis of Heterojunction p-n-p Cu2O/S-TiO2/CuO, and Application to the Photocatalytic Conversion of CO2 and Water Vapor to Methane", Journal of CO2 Utilization 20 (2017) 91-96
//3. "Cu2ZnSnS4 (CZTS)-ZnO: A noble metal-free hybrid Z-scheme photocatalyst for enhanced solar-spectrum photocatalytic conversion of CO2 to CH4", Journal of CO2 Utilization 20 (2017) 301-311
//4. "Highly Enhanced and Stable Activity of Defect Induced Titania Nanoparticles for Solar Light Driven CO2 Reduction into CH4", Materials Today Volume 20, Issue 9 (Nov. 2017) 507-515
//5. "Facile Fabrication of a Noble Metal-Fee Photocatalyst: TiO2 Nanotube Arrays Covered with Reduced Graphene Oxide", Carbon 98 (2016) 537-544. |
| E-mail |
insuil@dgist.ac.kr |
|
121st General Meeting of the KCS