Title

Optimal preparation of Fe/TiO2 catalysts with highly enhanced photocatalytic activity using atomic layer deposition

Presenter Information

Ye Jin
Xiaofeng Wang

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

Location

Upper Atrium/Hall

Start Date

4-11-2017 1:00 PM

End Date

4-11-2017 3:00 PM

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Apr 11th, 1:00 PM Apr 11th, 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.