Photocatalytic reduction of CO2 by (Ni-ZnO)@C nanoreactors | 33720
Organic Chemistry: Current Research

Organic Chemistry: Current Research
Open Access

ISSN: 2161-0401

+44 1478 350008

Photocatalytic reduction of CO2 by (Ni-ZnO)@C nanoreactors

3rd International Conference on Past and Present Research Systems of Green Chemistry

September 19-21, 2016 Las Vegas, USA

H Paul Wang, T C Yang, J Wang, Y L Wei, C J Jou, W K Lin and Juu-En Chang

National Cheng Kung University, Taiwan
University of California, USA
Tunghai University, Taiwan
National Kaohsiung First University of Science and Technology, Taiwan
National Tsing-Hua University, Taiwan

Posters & Accepted Abstracts: Organic Chem Curr Res

Abstract :

Nickel (Ni) and zinc oxide (ZnO) nanoparticles encapsulated in carbon-shell (Ni-ZnO)@C have been prepared for photocatalytic formation of valuable C1-C2 chemicals from CO2 and H2O. The (Ni-ZnO)@C nanoparticles having the Zn/Ni atomic ratios of 1-3 were synthesized by carbonization of Ni2+- and Zn2+-�?�?�?²-cyclodextrin at 573 K for two hours. Their component fitted XANES spectra indicate that nano Ni and ZnO are the main species in the (Ni-ZnO)@C. To increase the collision frequency of reactants (H2O and CO2) with the active sites (Ni and ZnO) within the carbon-shell, Ni and ZnO are partially etched from the (Ni-ZnO)@C with a H2SO4 solution (2N). By XRD and TEM, the sizes of the Ni and ZnO in (Ni- ZnO)@C are between 7-30 nm in diameter. Under the UV-Vis irradiation for five hours, yields of formic and acetic acids from the photocatalytic reduction of CO2 and H2O in the (Ni-ZnO)@C nanoreactors are 37.9 and 12.5 �?�?�?¼mol/g/hr, respectively. It seems that ZnO involves in photocatalytic splitting of H2O and provides hydrogen for catalytic hydrogenation of CO2 on Ni to yield formic and acetic acids.

Biography :

H Paul Wang has received his PhD degree in Chemical (Fuels) Engineering from University of Utah, Utah, USA. He is currently a Professor of Department of Environmental University, National Cheng Kung University, Taiwan. His research interest focuses on environmental nanotechnology, desalination and green energy. He has published more than 150 research papers.