Issue 28, 2019

Discovering a selective semimetal element to increase hematite photoanode charge separation efficiency

Abstract

This work describes a colloidal deposition process that exploits the thermal spreading ability of Sb over a hematite surface to obtain a mesoporous film with extensive open porosity and high degree of Sb5+ dispersion. The addition of Sb increased the efficiency of water oxidation by a factor of 4.5 and photocurrent at 1.23 VRHE by a factor of 6.5 compared to those of an unmodified hematite film prepared under the same conditions. The overall efficiency increase for water oxidation is attributed to more efficient charge separation. Sb was found to be an excellent selective semimetal modifier with high dispersion over the material.

Graphical abstract: Discovering a selective semimetal element to increase hematite photoanode charge separation efficiency

Supplementary files

Article information

Article type
Paper
Submitted
22 May 2019
Accepted
24 Jun 2019
First published
25 Jun 2019

J. Mater. Chem. A, 2019,7, 16992-16998

Discovering a selective semimetal element to increase hematite photoanode charge separation efficiency

A. E. Nogueira, M. R. Santos Soares, J. B. Souza Junior, C. A. Ospina Ramirez, F. L. Souza and E. R. Leite, J. Mater. Chem. A, 2019, 7, 16992 DOI: 10.1039/C9TA05452A

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