Photoreduction of CO2 into CH3OH and CH4 using Bi2S3/CeO2 nanocatalyst

Title : Photoreduction of CO2 into CH3OH and CH4 using Bi2S3/CeO2 nanocatalyst

Abstract:

High utilization of fossil fuels causes global warming due to a dramatic increase of the carbon dioxide (CO2) level in the atmosphere. Thus, it becomes essential to explore new energy resources. Several ways have been explored to cope with these issues, such as utilization of carbon-free alternative energy sources, increase in efficiency of carbon-based energy systems and recycling of CO2.  One economically feasible pathway is the photochemical conversion of CO2 into readily transportable and stable fuels, i.e., solar fuels (methane (CH4), methanol (CH3OH), and 1-butanol (C?H??O). Bi2S3 and CeO2,  and Bi2S3/CeO2 nanocatalyst  were produced under laboratory conditions. X-ray diffraction, high resolution transmission electron microscopy and scanning electron microscopy and UV/visible absorption spectroscopy and photoluminescence spectroscopy analysis were performed to determine and exhibits the physicochemical properties of Bi2S3/CeO2 nanocatalyst . Effects of Bi2S3 / CeO2 ratios (0,2, 0,4 and 0,6), Bi2S3/CeO2 nanocatalyst concentrations (0,2, 0,5, 0,7, 1,0 and 1,5   mg/l),photocatalytic contact time ( 5, 10, 15, 20 and 25 min), photoconversion power ( 0,5 , 1, 2, 5, 10 and 15 W/m2, temperature (15, 21, 30 and ^oC) and pH( 6, 7, 10) on the yields of CO2/ methane, CO2/ methanol, CO2/ butanol were studied. A cost analysis were performed for these studies.

Biography:

Prof. Dr. Delia Teresa Sponza is currently working as a professor at Dokuz Eylül University, Department of Environmental Engineering. Scientific study topics are; Environmental engineering microbiology, Environmental engineering ecology, Treatment of fluidized bed and activated sludge systems, Nutrient removal, Activated sludge microbiology, Environmental health, Industrial toxicity and toxicity studies, The effect of heavy metals on microorganisms, Treatment of toxic compounds by anaerobic / aerobic sequential processes, Anaerobic treatment of organic chemicals that cause industrial toxicity and wastewater containing them, Anaerobic treatability of wastewater containing dyes, Treatment of antibiotics with anaerobic and aerobic sequential systems, Anaerobic and aerobic treatment of domestic organic wastes with different industrial treatment sludges, Treatment of polyaromatic compounds with bio-surfactants in anaerobic and aerobic environments, Treatment of petrochemical, Textile and olive processing industry wastewater by sonication, Treatment of olive processing industry wastewater with nanoparticles and the toxicity of nanoparticles. She has many international publications.