GENERAL SEMINAR – Dr. André Luiz MENEZES DE OLIVEIRA, NPE-LACOM (Laboratory of Fuel and Materials), Federal University of Paraiba, João Pessoa, Brazil
Sustainable development is certainly a concern around the world, especially when a larger part of the world population lives in polluted areas. Therefore, managing pollution is certainly one of the world’s greatest challenges. Although strategies towards waste minimization are established in many countries, society continues to pollute the environment, especially the water bodies. For these reasons, several studies have focused on the development of new technologies and materials that can be employed for the mitigation of water pollution. Particularly, the heterogeneous photochemical process known as heterogeneous photocatalysis is one of the most important and promising techniques used nowadays that is capable to degrade different organic pollutants in water. Concerning the photocatalytic materials employed in such process, perovskite oxides with general formula ABO3, such as SrTiO3 and SrSnO3, have been widely investigated due to their interesting physical and chemical characteristics. However, because of the lower photoactivity, different strategies have been adopted for the enhancement of their photocatalytic properties. For instance, modification in the crystalline structure that alter symmetry, chemical doping that modifies the electronic configuration of cations in the lattice and the creation of different interfacial environments between two or more semiconductors have been investigated. In this context, examples of perovskite materials (from powders to thin films) in combination with strategies employed to enhance their efficiency in the photodegradation of organic dye pollutants in water will be demonstrated in the seminar. All the data that will be presented confirm the importance of combining and correlating different techniques to better understand the characteristics and properties of materials to fine tune their functionalities.
Dr. André Luiz MENEZES DE OLIVEIRA holds an International Joint PhD title (received in 2013) in Chemistry between the Universidade Federal da Paraíba (UFPB – Brazil) and Université de Rennes 1 (Rennes – France). During this period, the research was based on the synthesis of mixed oxide particles using polymeric precursor method, hydrothermal method and solid state reaction, besides depositing perovskites oxides thin films by Chemical Solution Deposition (CSD) and Pulsed Laser Deposition (PLD). In 2015/2016 he was a postdoctoral researcher at the School of Chemistry in The University of Sydney, Australia, working on the synthesis of oxynitrides and their structural characterizations using synchrotron and neutron radiation-based techniques.
Relevant papers of Dr. André Luiz MENEZES DE OLIVEIRA:
 TiO2/ZIF-67 nanocomposites synthesized by the microwave-assisted solvothermal method: a correlation between the synthesis conditions and antimicrobial properties, R.D. Campos, A.L. Menezes de Oliveira, A.M. Rostas, A.C. Kuncser, C.C. Negrila, A.C. Galca*, C. Felix, L. Castellano, F.F. da Silva, I.M. Garcia dos Santos*, New Journal of Chemistry 47 (2023) 2177, https://doi.org/10.1039/D2NJ04415C
 Understanding the Photocatalytic Activity of Sodium Hexatitanate Nanoparticles for Pollutants Degradation: A Spectroscopic Insight, A.R. Ferreira Alves Teixeira, A.L. Menezes de Oliveira, F. Neatu, A.C. Kuncser, A.C. Galca, A.M. Rostas, I.M. Garcia dos Santos*, ACS Applied Nano Materials 6 (2023) 4477, https://dx.doi.org/10.1021/acsanm.2c05577
 Europium induced point defects in SrSnO3-based perovskites employed as antibacterial agents, L. Chantelle, B.J. Kennedy, C. Pereire de Oliveira, F. Gouttefangas, M. Siu-li, R. Landers, A. Ciorita, A.M. Rostas, I.M. Garcia dos Santos, A.L. Menezes de Oliveira*, Journal of Alloys and Compounds 956 (2023) 170353, https://doi.org/10.1016/j.jallcom.2023.170353
 Functionalization of the hydroxyapatite surface with ZnO for alizarin immobilization, C. Oliveira, A.L. Menezes de Oliveira, L. Chantelle, G.R.S. Cavalcanti, R. Landers, S. Medina-Carrasco, M. Del Mar Orta, E. Cavalcanti Silva Filho, M. Jaber, M. Gardênnia Fonseca*, Applied Surface Science 593 (2022) 153412, https://doi.org/10.1016/j.apsusc.2022.153412
 SrTi1-xSnxO3 Thin Films as Photocatalysts for Organic Dye Degradation: Influence of the Composition, Deposition Method, and Growth Orientation, A.L. Menezes de Oliveira*, L. Chantelle, J.F.D. Figueiredo, I.A. de Sousa Filho, R. Lebullenger, S. Deputier, I.T. Weber, M. Guilloux-Viry, I.M. Garcia dos Santos*, V. Bouquet, in: Taft, C.A., de Lazaro, S.R. (Eds.) Research Topics in Bioactivity, Environment and Energy. Springer Nature Switzerland AG, Cham, Switzerland, 2022, pp.87-109, https://doi.org/10.1007/978-3-031-07622-0_3
 M-type hexaferrites SrxBa1-xFe12O19 as new magnetic pigments: The role of cationic substitution on the magnetic and colour characteristics, S.A.S. Lucena de Medeiros, A.L. Menezes de Oliveira*, G.S. Braga, C. Salvador, C. Chesman, R.B. da Silva*, U.C. Silva, L.E. Bastos Soledade, I.M. Garcia dos Santos, Ceramics International 48 (2022) 8258, https://doi.org/10.1016/j.ceramint.2021.12.030
 Photoluminescence in Alkaline Earth Stannate Thin Films Grown by Physical and Chemical Methods, A.L. Menezes de Oliveira, M.C. Ferreira Alves, J.L. Alves do Nascimento, V. Bouquet, I.T. Weber, S. Deputier, M. Siu-Li, E. Longo, M. Guilloux-Viry, I.M. Garcia dos Santos*, in: La Porta, F.A., Taft, C.A. (Eds.) Functional Properties of Advanced Engineering Materials and Biomolecules. Springer Nature Switzerland AG, Cham, Switzerland, 2021, pp. 155-183, https://dx.doi.org/10.1007/978-3-030-62226-8_5
 Probing the Site-Selective Doping in SrSnO3:Eu Oxides and Its Impact on the Crystal and Electronic Structures Using Synchrotron Radiation and DFT Simulations, L. Chantelle, A.L. Menezes de Oliveira*, B.J. Kennedy, J. Maul, M.R.S. da Silva, T.M. Duarte, A.R. Albuquerque, J.R. Sambrano, R. Landers, M. Siu-Li, E. Longo, I.M. Garcia dos Santos, Inorganic Chemistry 59 (2020) 7666, https://doi.org/10.1021/acs.inorgchem.0c00664
 Supporting the photocatalysts on ZrO2: An effective way to enhance the photocatalytic activity of SrSnO3, L.M. Castro Honorio, A.L. Menezes de Oliveira, E. Cavalcanti Silva Filho, J.A. Osajima, A. Hakki, D.E. Macphee, I.M. Garcia dos Santos*, Applied Surface Science 528 (2020) 146991, https://doi.org/10.1016/j.apsusc.2020.146991
 Evolution of the structural and microstructural characteristics of SrSn1 − xTixO3 thin films under the influence of the composition, the substrate and the deposition method, A.L. Menezes de Oliveira*, V. Bouquet, V. Dorcet, S. Ollivier, S. Députier, A. Gouveia de Souza, M. Siu-Li, E. Longo, I.T. Weber, I.M. Garcia dos Santos, M. Guilloux-Viry, Surface and Coatings Technology 313 (2017) 361, https://doi.org/10.1016/j.surfcoat.2017.01.082
* corresponding author