Dual Effects Of Nanostructuring And Oxygen Vacancy On Photoelectrochemical Water Oxidation Activity Of Superstructured And Defective Hematite Nanorods

Keywords

defects engineering; enhanced light absorption; hematite; nanorods; water splitting

Abstract

An Ar atmospheric treatment is rationally used to etch and activate hematite nanoflakes (NFs) as photoanodes toward enhanced photoelectrochemical water oxidation. The formation of a highly ordered hematite nanorods (NRs) array containing a high density of oxygen vacancy is successfully prepared through in situ reduction of NFs in Ar atmosphere. Furthermore, a hematite (104) plane and an iron suboxide layer at the absorber/back-contact interface are formed. The material defects produced by a thermal oxidation method can be critical for the morphology transformation from 2D NFs to 1D NRs. The resulting hematite NR photoanodes show high efficiency toward solar water splitting with improved light harvesting capabilities, leading to an enhanced photoresponse due to the artificially formed oxygen vacancies.

Publication Date

4-5-2018

Publication Title

Small

Volume

14

Issue

14

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1002/smll.201704464

Socpus ID

85042551536 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85042551536

This document is currently not available here.

Share

COinS