Photoconversion of CO2 into methanol over ZnO photocatalyst | ||
| Mansoura Journal of Chemistry | ||
| Volume 43, Issue 1, February 2019, Pages 20-22 PDF (711.91 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/mjcc.2019.412963 | ||
| Abstract | ||
| The dependence on fossil fuels for energy production has led to increasing carbon dioxide (CO2) gas concentration in the atmosphere from 280 ppm in the pre-industrial era to 406 ppm nowadays, causing the so-called global warming. Therefore, sustainable sources of energy are necessary to overcome this problem. In this paper, we report the photoreduction of CO2 into hydrocarbons fuel over ZnO semiconductor. ZnO photocatalyst was prepared via modified thermal decomposition method where the X-ray diffraction pattern proved the fabrication of wurtzite hexagonal structure of ZnO nanoparticles. CO2 photoreduction was operated in CO2-saturated 0.5 M NaCl solution using 150 W mercury (Hg) lamp as the light source. Methanol and acetaldehyde were the main products in the experiment with the maximum production yield of 10.9 and 16 µmol/g respectively. The high photocatalytic activity would be related to the presence of Cl- ions, which acted as hole scavenger which decreased the rate of charge carriers recombination | ||
| Keywords | ||
| ZnO; CO2 reduction; methanol | ||
|
Statistics Article View: 18 PDF Download: 9 |
||
