Extended visible light harvesting and boosted charge carrier dynamics in heterostructured zirconate-FeS2 photocatalysts for efficient solar water splitting
Artikel i vetenskaplig tidskrift, 2018

Limited visible light absorption, slow charge transference, and high recombination are some of the main problems associated with low efficiency in photocatalytic processes. For these reasons, in the present work, we develope novel zirconate-FeS2 heterostructured photocatalysts with improved visible light harvesting, effective charge separation and high photocatalytic water splitting performance. Herein, alkali and alkaline earth metal zirconates are prepared by a solid state reaction and coupled to FeS2 through a simple wet impregnation method. The incorporation of FeS2 particles induces visible light absorption and electron injection in zirconates, while the appropriate coupling of the semiconductors in the heterostructure allows an enhanced charge separation and suppression of the recombination. The obtained heterostructures exhibit high and stable photocatalytic activity for water splitting under visible light, showing competitive efficiencies among other reported materials. The highest hydrogen evolution rate (4490 mu molg(-1)h(-1)) is shown for BaZrO3-FeS2 and corresponds to more than 20 times the activity of the bare BaZrO3. In summary, this work proposes novel visible light active heterostructures for efficient visible light photocatalytic water splitting.

Författare

Ali M. Huerta-Flores

Universidad Autonoma de San Luis Potosi

Universidad Autonoma de Nuevo Leon

J. M. Mora-Hernandez

Universidad Autonoma de Nuevo Leon

Leticia M. Torres-Martinez

Universidad Autonoma de Nuevo Leon

Edgar Moctezuma

Universidad Autonoma de San Luis Potosi

D. Sanchez-Martinez

Universidad Autonoma de Nuevo Leon

Maria E. Zarazua-Morin

Universidad Autonoma de Nuevo Leon

Björn Wickman

Chalmers, Fysik, Kemisk fysik

Journal of Materials Science: Materials in Electronics

0957-4522 (ISSN) 1573-482X (eISSN)

Vol. 29 22 18957-18970

Ämneskategorier

Fysikalisk kemi

Atom- och molekylfysik och optik

Annan kemi

DOI

10.1007/s10854-018-0019-8

Mer information

Senast uppdaterat

2018-12-20