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...
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2025-07-01
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| author | Alexandra Ilie Luminița Predoană Crina Anastasescu Silviu Preda Ioana Silvia Hosu Ruxandra M. Costescu Daniela C. Culiță Veronica Brătan Ioan Balint Maria Zaharescu |
| author_facet | Alexandra Ilie Luminița Predoană Crina Anastasescu Silviu Preda Ioana Silvia Hosu Ruxandra M. Costescu Daniela C. Culiță Veronica Brătan Ioan Balint Maria Zaharescu |
| author_sort | Alexandra Ilie |
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| description | 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. |
| format | Article |
| id | doaj-art-2833fefe866145d98bcff3e13253ec12 |
| institution | Kabale University |
| issn | 2076-3417 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj-art-2833fefe866145d98bcff3e13253ec122025-08-20T03:32:12ZengMDPI AGApplied Sciences2076-34172025-07-011514766510.3390/app15147665Layered Perovskite La<sub>2</sub>Ti<sub>2</sub>O<sub>7</sub> Obtained by Sol–Gel Method with Photocatalytic ActivityAlexandra Ilie0Luminița Predoană1Crina Anastasescu2Silviu Preda3Ioana Silvia Hosu4Ruxandra M. Costescu5Daniela C. Culiță6Veronica Brătan7Ioan Balint8Maria Zaharescu9“Ilie Murgulescu” Institute of Physical Chemistry of the Romanian Academy, 202 Splaiul Independenței, 060021 Bucharest, Romania“Ilie Murgulescu” Institute of Physical Chemistry of the Romanian Academy, 202 Splaiul Independenței, 060021 Bucharest, Romania“Ilie Murgulescu” Institute of Physical Chemistry of the Romanian Academy, 202 Splaiul Independenței, 060021 Bucharest, Romania“Ilie Murgulescu” Institute of Physical Chemistry of the Romanian Academy, 202 Splaiul Independenței, 060021 Bucharest, RomaniaNational Institute for Research & Development in Chemistry and Petrochemistry ICECHIM, 202 Splaiul Independenței, 060021 Bucharest, RomaniaNational Institute of Materials Physics, Atomistilor 405A, 077125 Magurele, Romania“Ilie Murgulescu” Institute of Physical Chemistry of the Romanian Academy, 202 Splaiul Independenței, 060021 Bucharest, Romania“Ilie Murgulescu” Institute of Physical Chemistry of the Romanian Academy, 202 Splaiul Independenței, 060021 Bucharest, Romania“Ilie Murgulescu” Institute of Physical Chemistry of the Romanian Academy, 202 Splaiul Independenței, 060021 Bucharest, Romania“Ilie Murgulescu” Institute of Physical Chemistry of the Romanian Academy, 202 Splaiul Independenței, 060021 Bucharest, RomaniaThis 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.https://www.mdpi.com/2076-3417/15/14/7665layered perovskitePt-modified La<sub>2</sub>Ti<sub>2</sub>O<sub>7</sub>sol–gel methodnoble metalsphotocatalytic degradation of ethanol |
| spellingShingle | Alexandra Ilie Luminița Predoană Crina Anastasescu Silviu Preda Ioana Silvia Hosu Ruxandra M. Costescu Daniela C. Culiță Veronica Brătan Ioan Balint Maria Zaharescu Layered Perovskite La<sub>2</sub>Ti<sub>2</sub>O<sub>7</sub> Obtained by Sol–Gel Method with Photocatalytic Activity Applied Sciences 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 |
| title | Layered Perovskite La<sub>2</sub>Ti<sub>2</sub>O<sub>7</sub> Obtained by Sol–Gel Method with Photocatalytic Activity |
| title_full | Layered Perovskite La<sub>2</sub>Ti<sub>2</sub>O<sub>7</sub> Obtained by Sol–Gel Method with Photocatalytic Activity |
| title_fullStr | Layered Perovskite La<sub>2</sub>Ti<sub>2</sub>O<sub>7</sub> Obtained by Sol–Gel Method with Photocatalytic Activity |
| title_full_unstemmed | Layered Perovskite La<sub>2</sub>Ti<sub>2</sub>O<sub>7</sub> Obtained by Sol–Gel Method with Photocatalytic Activity |
| title_short | Layered Perovskite La<sub>2</sub>Ti<sub>2</sub>O<sub>7</sub> Obtained by Sol–Gel Method with Photocatalytic Activity |
| title_sort | layered perovskite la sub 2 sub ti sub 2 sub o sub 7 sub obtained by sol gel method with photocatalytic activity |
| topic | 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 |
| url | https://www.mdpi.com/2076-3417/15/14/7665 |
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