Optimal preparation of Fe/TiO2 catalysts with highly enhanced photocatalytic activity using atomic layer deposition
Department
Chemical and Biochemical Engineering
Major
Chemical Engineering
Research Advisor
Liang, Xinhua
Advisor's Department
Chemical and Biochemical Engineering
Funding Source
ACS Petroleum Research Fund; NSF CBET 1402122
Abstract
A series of uniform and highly dispersed Fe-deposited TiO2 samples were prepared by atomic layer deposition (ALD) at 400 ºC. The prepared samples were characterized by inductively coupled plasma - atomic emission spectroscopy (ICP-AES), nitrogen adsorption-desorption measurements, high resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD), X-ray absorption spectra (XAS) and diffuse reflectance UV-vis measurements. The photocatalytic activity was evaluated based on the degradation of methylene blue (MB) solution under UV light. The results showed that Fe subnanometer particles were deposited on TiO2 particles uniformly. The photocatalysis experiment demonstrates that 2 cycles Fe deposited TiO2 sample showed the highest activity and have a more than six-fold photocatalytic activity enhancement over pure TiO2 for the degradation of MB. The enhanced photocatalytic activity should be attributed to the fact that Fe3+ ions played a role as e-/h+ pair traps and consequently reduced e-/h+ pair recombination rate.
Biography
Ye Jin who joined joint undergraduate program between Missouri University of Science and Technology and China University of Petroleum in the Department of Chemical & Biochemical Engineering in January 2015. Being part of Dr. Xinhua Liang research group, Ye Jin research focus is on nanostructured materials for environmental application.
Research Category
Engineering
Presentation Type
Poster Presentation
Document Type
Poster
Award
Sciences oral presentation, Second place
Location
Upper Atrium/Hall
Presentation Date
11 Apr 2017, 1:00 pm - 3:00 pm
Optimal preparation of Fe/TiO2 catalysts with highly enhanced photocatalytic activity using atomic layer deposition
Upper Atrium/Hall
A series of uniform and highly dispersed Fe-deposited TiO2 samples were prepared by atomic layer deposition (ALD) at 400 ºC. The prepared samples were characterized by inductively coupled plasma - atomic emission spectroscopy (ICP-AES), nitrogen adsorption-desorption measurements, high resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD), X-ray absorption spectra (XAS) and diffuse reflectance UV-vis measurements. The photocatalytic activity was evaluated based on the degradation of methylene blue (MB) solution under UV light. The results showed that Fe subnanometer particles were deposited on TiO2 particles uniformly. The photocatalysis experiment demonstrates that 2 cycles Fe deposited TiO2 sample showed the highest activity and have a more than six-fold photocatalytic activity enhancement over pure TiO2 for the degradation of MB. The enhanced photocatalytic activity should be attributed to the fact that Fe3+ ions played a role as e-/h+ pair traps and consequently reduced e-/h+ pair recombination rate.
