Highly enhanced adsorption and photocatalytic performance of TiO2 quantum dots synthesized by microwaves for degradation of reactive red azo dye

In this work, highly homogeneous TiO 2 quantum dots (QDs) were synthesized and evaluated about their adsorption potential and applied as photocatalysts for the degradation of reactive red azo dye (RR141). QDs were produced by a low-energy and eco-friendly microwave-assisted method. Different microwa...

Full description

Saved in:
Bibliographic Details
Published in:Journal of nanoparticle research : an interdisciplinary forum for nanoscale science and technology 2021-05, Vol.23 (5), Article 113
Main Authors: Frizzo, Marcela Sagrilo, Betega, Kaoma, Poffo, Claudio Michel, Falk, Gilberto S., Hotza, Dachamir, Rodrigues Neto, João Batista
Format: Article
Language:English
Subjects:
Adsorption
Adsorptivity
Anatase
Azo dyes
Characterization and Evaluation of Materials
Chemistry and Materials Science
Comminution
Crystallites
Crystals
Degradation
Inorganic Chemistry
Lasers
Materials Science
Microwaves
Nanoparticles
Nanotechnology
Optical Devices
Optics
Photocatalysis
Photocatalysts
Photomicrographs
Photonics
Physical Chemistry
Quantum dots
Research Paper
Size reduction
Surface chemistry
Synthesis
Titanium dioxide
X-ray diffraction
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In this work, highly homogeneous TiO 2 quantum dots (QDs) were synthesized and evaluated about their adsorption potential and applied as photocatalysts for the degradation of reactive red azo dye (RR141). QDs were produced by a low-energy and eco-friendly microwave-assisted method. Different microwave times (10, 20, 30, and 60 min) and temperatures (120, 140, 160, 180 °C) were evaluated. Raman and X-ray diffraction (XRD) data detected anatase as the major crystalline phase. XRD also indicated an increase in the interfacial component as the microwave temperature decreases, resulting in a highly energetic surface and super-adsorptive QDs. TiO 2 crystallites presented an average size of 5 to 6.2 nm as calculated from the Scherrer equation and confirmed by TEM micrographs. As a feature of the particle size reduction, the QDs synthesized by 10 min and 120 °C presented a large specific surface area (~ 259 m 2 ·g −1 ), higher interfacial component (60%), high adsorptivity, and a fast (~ 5 min) 100% degradation of RR141, making this a promising photocatalyst techno-commercial material. Graphical abstract
ISSN:1388-0764
1572-896X
DOI:10.1007/s11051-021-05237-x