Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.


Issue 21, 2017
Previous Article Next Article

Demonstration of enhanced carrier transport, charge separation, and long-term stability for photocatalytic water splitting by a rapid hot pressing process

Author affiliations

Abstract

In this study, a rapid hot pressing process (HPP) has been adopted to enhance the photocatalytic water splitting efficiency of the TiO2–Fe2O3 metal oxide cocatalyst. Without complicated nanostructure fabrication, the hot pressed sample demonstrated more than 6-fold photocurrent enhancement compared to the untreated sample at an applied voltage of 1.2 V. This enhancement is attributed to the improvement of carrier transport properties in the TiO2–Fe2O3 matrix due to a significant reduction of the film thickness after the hot pressing process. In addition to the enhanced photocurrent, we observed a significant improvement of the stability and resistance to corrosion in a 1 M NaOH electrolyte due to the increase in the stiffness of the thin film from 80 GPa to 125 GPa after the hot pressing process. The improvements of carrier transport and charge separation are measured using photoluminescence (PL) spectroscopy and electrochemical impedance spectroscopy (EIS). The crystallinity and grain size of TiO2–Fe2O3 have been characterized by high-resolution transmission electron microscopy (HRTEM) before and after the hot pressing process. We also examined the plasmonic resonance effect by integration of plasmonic gold nanoparticles (NPs) into this hot pressed TiO2–Fe2O3 cocatalyst to achieve a further enhancement of hydrogen production.

Graphical abstract: Demonstration of enhanced carrier transport, charge separation, and long-term stability for photocatalytic water splitting by a rapid hot pressing process

Back to tab navigation

Supplementary files

Article information


Submitted
07 Feb 2017
Accepted
18 Apr 2017
First published
18 Apr 2017

J. Mater. Chem. A, 2017,5, 10687-10695
Article type
Paper

Demonstration of enhanced carrier transport, charge separation, and long-term stability for photocatalytic water splitting by a rapid hot pressing process

W. Hung, K. Yang, S. Lai, C. Yang, J. Shyue, C. Ku and S. B. Cronin, J. Mater. Chem. A, 2017, 5, 10687
DOI: 10.1039/C7TA01166K

Social activity

Search articles by author

Spotlight

Advertisements