3D structured photocatalysts for sustainable H2O2 generation from saccharides derivatives

• Tipo: Artigo em Revista Científica Internacional
• Data: 2023

Autores

Borges, RA (Autor) Outra; Pedrosa, MF (Autor) FEUP; Manrique, Y.A. (Autor) FEUP; Claudia G Silva (Autor) FEUP; Silva, Adrian (Autor) FEUP; Faria, JL (Autor) Outra; Sampaio, M.J. (Autor) FEUP

Revista

Título: Chemical Engineering Journal

Vol. 470

ISSN: 1385-8947

Editora: Elsevier

Indexação

ISI Web of Knowledge - 0 Citações

Scopus - 0 Citações

Projetos Associados

Healthy Waters - Healthy Waters - Identification, Elimination, Social Awareness and Education of Water Chemical and Biological Micropollutants with Health and Environmental Implications

Outras Informações

ID Authenticus: P-00Y-MX9

DOI: 10.1016/j.cej.2023.144066

Abstract (EN): The possibility of using hydrogen peroxide (H2O2) as a chemical oxidizer or as a green liquid fuel to produce electricity has encouraged both the scientific and industrial communities to investigate green technologies aimed at the sustainability of the production process. In particular, the light-induced synthesis of H2O2 from water and oxygen has attracted significant attention using optical semiconductors.An exfoliated metal-free graphitic carbon nitride material (GCN-T) was prepared and tested for the photocatalytic production of H2O2 using five saccharides (arabinose, cellobiose, fructose, glucose, and sorbitol) as sacrificial electron donors. The results showed that the scavenging efficiency of the photogenerated holes rapidly increases with the number of -OH groups in the molecular structure of these sacrificial agents. Among the polyhydroxy compounds tested, the highest concentration of H2O2 was achieved using cellobiose.To develop a technological approach for H2O2 production, the GCN-T photocatalyst was immobilized on a 3D printed structure (GCN-T/3D structure), which showed high stability with both ultrapure water and seawater after several reusability runs. This innovative photocatalytic structure enables remarkable efficiency for H2O2 production, with an apparent quantum efficiency (AQE) of 17% at 412 nm radiation, compared to 12% obtained with GCN-T in suspension.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 8