Bifunctional nanocomposites based on TixSn1-xO2 obtained by the protein sol-gel method using the microwave-assisted hydrothermal process

IF 5.1 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International Pub Date : 2025-03-01 DOI:10.1016/j.ceramint.2024.12.264

Raissa da Cruz Serejo , Aluísio Alves Cabral Junior , Alejandro Eusébio Rojas Nuñez , Antônio Ernandes Macedo Paiva , Sérgio Luís Sales de Oliveira , Cristina de Andrade Monteiro , Davi Souza Ferreira , Lucia Helena Mascaro Sales , Gilvan Pereira de Figueredo , José Hilton Gomes Rangel , Rodolfo Luiz Bezerra de Araújo Medeiros , Marcelo Moizinho Oliveira

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引用次数: 0

Abstract

The microwave-assisted hydrothermal sol-gel method is a relatively new method of processing nanomaterials little used. This method stands out for its ability to produce highly pure homogeneous nanopowders in a short time at low temperatures. Studies involving this technique report more than one type of processing to obtain the desired material. However, in this work, the Ti_xSn_1-xO₂ composite was obtained in one step. Therefore, the aim of this work was to synthesize, for the first time, nanocomposites based on Ti_xSn_1-xO₂ (x = 0, 0.3, 0.5, 0.7 and 1) by the microwave-assisted hydrothermal protein sol-gel method in one step, using a protein precursor from a renewable source, rendering the method more environmentally friendly. The results obtained by XRD, Rietveld refinement, FTIR, TG/DSC, SEM-EDS, SEM-FEG, nitrogen physisorption analysis using the BET method and diffuse reflectance spectroscopy in the UV–Vis region indicated that Ti_xSn_1-xO₂ nanocomposites can be obtained in up to 60 min at a temperature of 170 °C. The samples had a tetragonal rutile and anatase phase, with agglomerates of particles between 36.9 and 83.0 nm in size, inhomogeneous and in the shape of nanospheres an nanorods, and a surface area of up to 188.186 m² g^-1. It was observed that the band gap energy decreased as the concentration of TiO₂ increased (3.67–3.04 eV). The photocatalytic activity of the nanocomposites was assessed by the photodegradation of the dye methylene blue (MB), showing a decolorization rate of up to 76 % in 160 min under UV-C irradiation. Antibacterial activity was checked by broth microdilution against standard strains of E. coli and S. aureus bacteria and all the samples showed antibacterial activity against the strains with a minimum inhibitory concentration (MIC) of up to 625 μg mL⁻¹. These results therefore highlight the efficiency of the proposed method for obtaining bifunctional nanocomposites.

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来源期刊

Ceramics International 工程技术-材料科学：硅酸盐

CiteScore

9.40

自引率

15.40%

发文量

4558

审稿时长

25 days

期刊介绍： Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties. Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour. Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.