Porous Hematite Photocatalytic Structures on Freestanding CuO-Sb2O5-SnO2 Ceramics for Solar-Driven Water Splitting and Flow-Through Water Purification

Iván Corrales-Mendoza, Alexander N. Bondarchuk, Josué A. Aguilar-Martínez, Frank Marken, Rene F. Cienfuegos-Pelaes, Raúl Salas Coronado, Carlos A. Martínez-González

Research output: Contribution to journalArticlepeer-review

Abstract

High porosity and large photoactive surface of photoelectrodes grown on nano-grained and conductive ceramics provide freestanding structures for applications in photoelectrolysis and flow-through water purification. This study presents unmodified hematite photoelectrodes grown on CuO-Sb2O5-SnO2 ceramics, exhibiting photocurrent density of 0.63 mA cm−2 at 1.23 V versus a reversible hydrogen electrode (RHE) under AM1.5G radiation. The obtained photoelectrodes are tested for cleaning seawater contaminated with methylene blue. The photocatalytic structures are examined by photoelectrochemical measurements, x-ray diffraction, scanning electron microscopy, energy-dispersive x-ray spectroscopy, x-ray photoelectron spectroscopy, ultraviolet–visible spectroscopy, and Raman spectroscopy. The influence of substrate temperature on photocurrents obtained with these photoelectrodes is studied and discussed.

Original languageEnglish
Pages (from-to)556-567
Number of pages12
JournalJournal of Electronic Materials
Volume54
Issue number1
Early online date20 Nov 2024
DOIs
Publication statusE-pub ahead of print - 20 Nov 2024

Acknowledgements

A.N.B. thanks the National Science and Technology Council of Mexico (CONACYT) for the support of this study (Grant #A1-S-20353).

Funding

FundersFunder number
Consejo Nacional de Humanidades, Ciencias y Tecnologías#A1-S-20353
Consejo Nacional de Humanidades, Ciencias y Tecnologías

    Keywords

    • Hematite
    • photoanode
    • photocatalysis
    • solar energy
    • tin-dioxide ceramics
    • water splitting

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics
    • Electrical and Electronic Engineering
    • Materials Chemistry

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