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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.

Email: wanghp@mail.ncku.edu.tw

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