Exploration of bismuth-based materials for photocatalytic decomposition of N2O

Abstract

This work is focused on the investigation of three different Bi-based materials, i.e., CaBi2O2(CO3)2 (CBOC), Ca4Bi6O13 (CBO), and Bi2Ce2O7 (BCO), as photocatalysts in N2O reduction. This study has emphasized the effectiveness of bismuth ion, irrespective of its presence in different structures with self-regulating electronic and morphological properties, when employed as a photocatalyst. Monophasic CBOC, CBO, and BCO samples have been synthesized by wet-chemical methods, and they exhibit distinct morphological features such as plate-like, dumble-shaped, and irregularly shaped crystallites. From the UV-visible diffuse reflectance spectroscopy (DRS) data, CBO exhibits a lower optical band gap of 2.52 eV compared to CBOC (3.95 eV), which CBO is synthesized from. BCO shows the lowest optical band gap of 2.16 eV. CBO exhibits the highest photocurrent generation and the lowest value in work function measurements, following the trend as CBO ˃ CBOC ˃ BCO. The efficiency of the Bi-based materials in photocatalytic decomposition of N2O also follows a similar trend as observed in the photocurrent measurements, wherein the CBO sample exhibits a maximum of 10.4% decomposition of N2O under UV-A in 24 h. Oxygen vacancies in CBO and BCO have been reasoned to play a crucial role in the photocatalytic decomposition of N2O.

Supplementary files

Article information

Article type
Paper
Submitted
15 apr 2024
Accepted
17 jun 2024
First published
21 jun 2024
This article is Open Access
Creative Commons BY license

Energy Adv., 2024, Accepted Manuscript

Exploration of bismuth-based materials for photocatalytic decomposition of N2O

S. Atri, S. Uma, R. Nagarajan, M. Gregor, T. Roch, M. F. Edelmannova, R. Martin, K. Kočí, M. Motola and O. Monfort, Energy Adv., 2024, Accepted Manuscript , DOI: 10.1039/D4YA00240G

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements