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Microwave-assisted synthesis of metal oxides semiconductors heterojunctions with photocatalytic applications


Using solar light in photo-induced processes is very attractive since it is a clean and practically limitless energy source. Recently research related to the development of new photocatalysts capable of use this kind of energy has been growing. Metal oxides semiconductors have excelled in this field, however, the development of materials capable of utilize the visible component of the radiation (major portion) it is a contemporary challenge. In this context, this research proposal has as objective the development of new heterojunctions of nanostructured metal oxides semiconductors, whose synergic effect make it possible the use of the visible radiation, resulting in improved photocatalytic activity. Initially, systems involving mainly BiVO4, ZnO, TiO2 and derivatives will be investigated. These catalysts will be synthesized through microwave-assisted routes, an emergent technique that allows quickly obtaining of the desired products, with high selectivity, high yields and low energetic consumption, in comparison to conventional synthesis methods. Thus, several methodological studies can be carried out in a short period of time, allowing the investigation of the ideal synthetic conditions to obtain nanomaterials with controlled morphology and structure. These new materials will be characterized through several techniques and applied on photodegradation of organic species as dyes and pesticides, besides the photoelectrochemical generation of H2. As a result it is expected to accurately stablish new protocols of microwave-assisted synthesis, producing unpublished photocatalysts with high activity toward visible radiation and with extremely relevant applications from the environmental point of view. (AU)

Scientific publications (6)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
SOUZA, JULIANA S.; ALVES, WENDEL A. Influence of Preparation Methodology on the Photocatalytic Activity of Nitrogen Doped Titanate and TiO2 Nanotubes. Journal of Nanoscience and Nanotechnology, v. 20, n. 9, p. 5390-5401, SEP 2020. Web of Science Citations: 0.
KUZNETSOVA, MARIA; OLIVEIRA, SIBILA A. A.; RODRIGUES, BARBARA S.; SOUZA, JULIANA S. Microwave-Assisted Synthesis of Bismuth Niobate/Tungsten Oxide Photoanodes for Water Splitting. TOPICS IN CATALYSIS, JUL 2020. Web of Science Citations: 0.
RODRIGUES, BARBARA SCOLA; BRANCO, CAROLYNE MARTINS; CORIO, PAOLA; SOUZA, JULIANA S. Controlling Bismuth Vanadate Morphology and Crystalline Structure through Optimization of Microwave-Assisted Synthesis Conditions. Crystal Growth & Design, v. 20, n. 6, p. 3673-3685, JUN 3 2020. Web of Science Citations: 0.
CLAUDINO, CAROLINE H.; KUZNETSOVA, MARIA; RODRIGUES, BARBARA S.; CHEN, CHANGQIANG; WANG, ZHIYU; SARDELA, MAURO; SOUZA, JULIANA S. Facile one-pot microwave-assisted synthesis of tungsten-doped BiVO4/WO3 heterojunctions with enhanced photocatalytic activity. Materials Research Bulletin, v. 125, MAY 2020. Web of Science Citations: 0.
SOUZA, HELLEN T. S.; OLIVEIRA, SIBILA A. A.; SOUZA, JULIANA S. Modulating the photocatalytic activity of Ag nanoparticles-titanate nanotubes heterojunctions through control of microwave-assisted synthesis conditions. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, v. 390, MAR 1 2020. Web of Science Citations: 0.
SOUZA, JULIANA S.; HIRATA, FERNANDO T. H.; CORIO, PAOLA. Microwave-assisted synthesis of bismuth vanadate nanoflowers decorated with gold nanoparticles with enhanced photocatalytic activity. JOURNAL OF NANOPARTICLE RESEARCH, v. 21, n. 2 FEB 10 2019. Web of Science Citations: 1.

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