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Effect of Decoration of C@TiO 2 Core-Shell Composites with Nano-Ag Particles on Photocatalytic Activity in 4-Nitrophenol Degradation.

Authors :
Sidor, Karol
Lehmann, Róża
Rokicińska, Anna
Berniak, Tomasz
Dębosz, Marek
Kuśtrowski, Piotr
Source :
Catalysts (2073-4344); Apr2023, Vol. 13 Issue 4, p764, 16p
Publication Year :
2023

Abstract

Photoactive TiO<subscript>2</subscript> materials based on a C@TiO<subscript>2</subscript> core-shell structure synthesized according to the bottom-up strategy using a spherical resin core were presented in relation to commercial TiO<subscript>2</subscript> (P25) used as a reference material. The studied TiO<subscript>2</subscript> materials were modified with Ag nanoparticles using two alternative methods: impregnation and precipitation. Depending on the deposition technique used, different distributions of the Ag modifier were achieved within the TiO<subscript>2</subscript> structure. As confirmed by X-ray diffraction (XRD) and scanning electron microscopy (SEM) measurements, the precipitation technique resulted in the formation of almost twice smaller, highly dispersed Ag nanoparticles compared to impregnation. Furthermore, the effect of the performed modification on the textural properties (low-temperature N<subscript>2</subscript> adsorption) and surface composition (X-ray photoelectron spectroscopy) was determined. The phase composition of the TiO<subscript>2</subscript> support as well as the dispersion of the Ag modifier significantly affected the energy gap determined from UV–Vis spectra and, consequently, their performance in the process photodegradation of 4-nitrophenol tested as a model molecule. In the case of the @TiO<subscript>2</subscript> material modified with highly dispersed Ag, significantly higher photoactivity in the visible light range was observed than in the presence of analogous P25-based materials. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
20734344
Volume :
13
Issue :
4
Database :
Complementary Index
Journal :
Catalysts (2073-4344)
Publication Type :
Academic Journal
Accession number :
163371185
Full Text :
https://doi.org/10.3390/catal13040764