Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Preparation of Heterojunctions Based on Cs3Bi2Br9 Nanocrystals and G-C3N4 Nanosheets for Photocatalytic Hydrogen Evolution

María Medina-Llamas
* ,
Andrea Speltini
ORCID logo ,
Antonella Profumo
ORCID logo ,
Francesca Panzarea
,
Antonella Milella
ORCID logo ,
Francesco Fracassi
,
Andrea Listorti
ORCID logo ,
Lorenzo Malavasi
*
Version 1 : Received: 26 November 2022 / Approved: 29 November 2022 / Online: 29 November 2022 (02:54:05 CET)

A peer-reviewed article of this Preprint also exists.

Medina-Llamas, M.; Speltini, A.; Profumo, A.; Panzarea, F.; Milella, A.; Fracassi, F.; Listorti, A.; Malavasi, L. Preparation of Heterojunctions Based on Cs3Bi2Br9 Nanocrystals and g-C3N4 Nanosheets for Photocatalytic Hydrogen Evolution. Nanomaterials 2023, 13, 263. Medina-Llamas, M.; Speltini, A.; Profumo, A.; Panzarea, F.; Milella, A.; Fracassi, F.; Listorti, A.; Malavasi, L. Preparation of Heterojunctions Based on Cs3Bi2Br9 Nanocrystals and g-C3N4 Nanosheets for Photocatalytic Hydrogen Evolution. Nanomaterials 2023, 13, 263.

Abstract

Heterojunctions based on metal halide perovskites (MHPs) are promising systems for photocatalytic hydrogen evolution reaction (HER). In this work, we coupled Cs3Bi2Br9 nanocrystals (NCs), obtained by wet ball milling synthesis, with g-C3N4 nanosheets (NSs) produced by thermal oxidation of bulk g-C3N4 in air. These methods are reproducible, inexpensive, and easy to scale up. Heterojunctions with different loadings of Cs3Bi2Br9 NCs were fully characterized and tested for HER. A relevant improvement of H2 production with respect to pristine carbon nitride was achieved at low NCs levels reaching values up to about 4600 µmol g-1 h-1. This work aims to provide insights on the synthesis of inexpensive and high performing heterojunctions using MHP for photocatalytic applications.

Keywords

lead-free perovskites; hydrogen evolution; photocatalysis, carbon nitride, perovskites, ball milling

Subject

Chemistry and Materials Science, Materials Science and Technology

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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