Layered Perovskite La<sub>2</sub>Ti<sub>2</sub>O<sub>7</sub> Obtained by Sol–Gel Method with Photocatalytic Activity

Layered Perovskite La<sub>2</sub>Ti<sub>2</sub>O<sub>7</sub> Obtained by Sol–Gel Method with Photocatalytic Activity

This paper presents the synthesis of La<sub>2</sub>Ti<sub>2</sub>O<sub>7</sub> nanoparticles by the sol–gel method starting from lanthanum nitrate and titanium alkoxide (noted as LTA). Subsequently, the lanthanum titanium oxide nanoparticles are modified with nobl...

Full description

Saved in:
Bibliographic Details
Main Authors: Alexandra Ilie, Luminița Predoană, Crina Anastasescu, Silviu Preda, Ioana Silvia Hosu, Ruxandra M. Costescu, Daniela C. Culiță, Veronica Brătan, Ioan Balint, Maria Zaharescu
Format: Article
Language:English
Published: MDPI AG 2025-07-01
Series:Applied Sciences
Subjects:
layered perovskite
Pt-modified La<sub>2</sub>Ti<sub>2</sub>O<sub>7</sub>
sol–gel method
noble metals
photocatalytic degradation of ethanol
Online Access:https://www.mdpi.com/2076-3417/15/14/7665
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This paper presents the synthesis of La<sub>2</sub>Ti<sub>2</sub>O<sub>7</sub> nanoparticles by the sol–gel method starting from lanthanum nitrate and titanium alkoxide (noted as LTA). Subsequently, the lanthanum titanium oxide nanoparticles are modified with noble metals (platinum) using the chemical impregnation method, followed by a reduction process with NaBH<sub>4</sub>. The comparative analysis of the structure and surface characteristics of the nanopowders subjected to thermal treatment at 900 °C is conducted using Fourier transform infrared spectroscopy (FT-IR), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) with energy-dispersive X-ray spectroscopy (EDX), transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray fluorescence (XRF), ultraviolet-visible (UV–Vis) spectroscopy, as well as specific surface area and porosity measurements. The photocatalytic activity is evaluated in the oxidative photodegradation of ethanol (CH<sub>3</sub>CH<sub>2</sub>OH) under simulated solar irradiation. The modified sample shows higher specific surfaces areas and improved photocatalytic properties, proving the better conversion of CH<sub>3</sub>CH<sub>2</sub>OH than the pure sample. The highest conversion of ethanol (29.75%) is obtained in the case of LTA-Pt after 3 h of simulated solar light irradiation.
ISSN:2076-3417

Similar Items