resumo
The photocatalytic activity of a silica coated nanomagnet porphyrin hybrid (NPH) and of the corresponding porphyrin precursors (H2P and ZnP) was evaluated in the degradation of the methyl orange dye (MO ) under visible light irradiation. The catalytic degradation of MO was performed under air, in the absence and in the presence of aqueous hydrogen peroxide. The results show that the hybrid NPH was the most effective photocatalyst causing the total degradation of MO after 270 min of white light irradiation (150 mW cm(-2) ) in the presence of hydrogen peroxide. The remarkable photocatalytic activity of this NPH, associated with the possibility of its reuse, makes this material a promising photocatalyst. (C) 2021 Elsevier B.V. All rights reserved.
palavras-chave
BIOMIMETIC OXIDATION; HYDROGEN-PEROXIDE; CATALYSTS; EFFICIENT; MAGNETITE; WATER; DYES; PHOTODEGRADATION; PHOTOSENSITIZERS; NANOPARTICLES
categoria
Chemistry, Inorganic & Nuclear; Chemistry, Organic
autores
Castro, KADF; Rodrigues, JMM; Faustino, MAF; Tome, JPC; Cavaleiro, JAS; Neves, MDPMS; Simoes, MMQ
nossos autores
João M. M. Rodrigues
Investigador AuxiliarProjectos
CICECO - Aveiro Institute of Materials (UIDB/50011/2020)
agradecimentos
Thanks are due to CNPq (Conselho Nacional de Desenvolvimento Cientifico e Tecnologico) and CAPES (Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior). The authors also acknowledge the University of Aveiro and FCT/MCTES (Fundacao para a Ciencia e Tecnologia and Ministerio da Ciencia, Tecnologia e Ensino Superior) and European Union (COMPETE and FEDER programs) for the financial support of UIDB/50006/2020 (LAQV-REQUIMTE), UIDB/50011/2020 & UIDP/50011/2020 (CICECO) and UIDB/00100/2020 (CQE) research units and to the project COP2P (PTDC/QUI-QOR/30771/2017), through national funds and, when applicable, co-financed by FEDER-Operational Thematic Program for Competitiveness and Internationalization-COMPETE 2020, within the PT2020 Partnership Agreement. K. A. D. F. Castro thanks CNPq for her post-doctoral scholarship (Process 201107/2014-7) and J. M. M. Rodrigues acknowledges funding in the form of a Junior Researcher Contract under the scope of the project COP2P (PTDC/QUI-QOR/30771/2017).