Exploiting visible light for NOx degradation represents an important challenge to enhance the air quality of our environment. In the present study, the photocatalytic activities of two commercial strontium titanate (STO) having different sizes (micro and nano) were compared towards NOx degradation under LED light. The decoration of both STO photocatalysts by Ag nanoparticles (8 theoretical wt.%) led to enhanced photocatalytic efficiency more than twice. In particular, nano-sized Ag@STO showed the highest activity (75% of NOx degradation) within 180 min due to Ag nanoparticles (NPs) localized surface plasmon resonance (LSPR) properties and the large surface area of nano-STO. The photocatalysts were synthesized by the wet impregnation method and calcined at 400 °C. Their structural, morphological, specific surface area, and optical properties were characterized by X-ray diffraction (XRD), Field Emission Scanning Electron Microscopy (FESEM), N2 adsorption/desorption analysis, and UV–Vis diffuse reflectance spectroscopy (DRS).

Visible light active Ag@SrTiO3: a powerful photocatalyst for NOx degradation / M. Ordonez, E. Falletta, G. Cerrato, C.L. Bianchi. - In: JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY. A, CHEMISTRY. - ISSN 1010-6030. - 456:(2024 Nov 01), pp. 115805.1-115805.11. [10.1016/j.jphotochem.2024.115805]

Visible light active Ag@SrTiO3: a powerful photocatalyst for NOx degradation

M. Ordonez
Primo
;
E. Falletta
Secondo
;
C.L. Bianchi
Ultimo
2024

Abstract

Exploiting visible light for NOx degradation represents an important challenge to enhance the air quality of our environment. In the present study, the photocatalytic activities of two commercial strontium titanate (STO) having different sizes (micro and nano) were compared towards NOx degradation under LED light. The decoration of both STO photocatalysts by Ag nanoparticles (8 theoretical wt.%) led to enhanced photocatalytic efficiency more than twice. In particular, nano-sized Ag@STO showed the highest activity (75% of NOx degradation) within 180 min due to Ag nanoparticles (NPs) localized surface plasmon resonance (LSPR) properties and the large surface area of nano-STO. The photocatalysts were synthesized by the wet impregnation method and calcined at 400 °C. Their structural, morphological, specific surface area, and optical properties were characterized by X-ray diffraction (XRD), Field Emission Scanning Electron Microscopy (FESEM), N2 adsorption/desorption analysis, and UV–Vis diffuse reflectance spectroscopy (DRS).
LED light; Metal decoration; NOx abatement; Photocatalysis; Strontium titanate;
Settore CHIM/04 - Chimica Industriale
   Piano di Sostegno alla Ricerca 2015-2017 - Linea 2 "Dotazione annuale per attività istituzionali" (anno 2021)
   UNIVERSITA' DEGLI STUDI DI MILANO
1-nov-2024
6-giu-2024
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/1059828
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