Currently, photocatalytic reactions under solar illumination have attracted worldwide attention due to the tremendous set of associated environmental problems. Taking sunlight into ac- count, it is indispensable to develop highly effective photocatalysts. Strontium titanate, SrTiO3 (STO), is a cubic perovskite-type semiconductor, an inexpensive material with high thermal stability and corrosion resistance that exhibits a similar energy bandgap to TiO2 and can represent an interesting alternative in photocatalytic applications. Particle size can significantly affect both photocatalytic and photoelectrochemical properties of a photocatalyst, thus altering the photooxidation of organic pollu- tants in air or water. In this context, this research aims at investigating the photocatalytic features of nano- and micro-sized commercial STO powders towards the photodegradation of diclofenac (DFC), a non-steroidal, anti-inflammatory drug, widely used as analgesic, antiarthritic, and antirheumatic. Both nano- and micro-STO photocatalysts exhibited remarkable photocatalytic efficiency towards DCF, reaching photodegradation efficiency higher than 90% within one hour. Results obtained in sim- ulated drinking water were also compared to those obtained in ultrapure water. Both STOs showed good stability during recycling tests, maintaining high performances after three cycles. Eventually, active species were identified using various scavengers by trapping holes and radicals generated during the photocatalytic degradation process.

Sustainable Solar Light Photodegradation of Diclofenac by Nano- and Micro-Sized SrTiO3 / M.G. Galloni, G. Cerrato, A. Giordana, E. Falletta, C.L. Bianchi. - In: CATALYSTS. - ISSN 2073-4344. - 12:8(2022), pp. 804.1-804.17. [10.3390/catal12080804]

Sustainable Solar Light Photodegradation of Diclofenac by Nano- and Micro-Sized SrTiO3

M.G. Galloni
Primo
;
E. Falletta
Penultimo
;
C.L. Bianchi
Ultimo
2022

Abstract

Currently, photocatalytic reactions under solar illumination have attracted worldwide attention due to the tremendous set of associated environmental problems. Taking sunlight into ac- count, it is indispensable to develop highly effective photocatalysts. Strontium titanate, SrTiO3 (STO), is a cubic perovskite-type semiconductor, an inexpensive material with high thermal stability and corrosion resistance that exhibits a similar energy bandgap to TiO2 and can represent an interesting alternative in photocatalytic applications. Particle size can significantly affect both photocatalytic and photoelectrochemical properties of a photocatalyst, thus altering the photooxidation of organic pollu- tants in air or water. In this context, this research aims at investigating the photocatalytic features of nano- and micro-sized commercial STO powders towards the photodegradation of diclofenac (DFC), a non-steroidal, anti-inflammatory drug, widely used as analgesic, antiarthritic, and antirheumatic. Both nano- and micro-STO photocatalysts exhibited remarkable photocatalytic efficiency towards DCF, reaching photodegradation efficiency higher than 90% within one hour. Results obtained in sim- ulated drinking water were also compared to those obtained in ultrapure water. Both STOs showed good stability during recycling tests, maintaining high performances after three cycles. Eventually, active species were identified using various scavengers by trapping holes and radicals generated during the photocatalytic degradation process.
diclofenac; solar photodegradation; strontium titanate; water remediation
Settore CHIM/04 - Chimica Industriale
Settore CHIM/03 - Chimica Generale e Inorganica
Settore CHIM/02 - Chimica Fisica
INTLI20CBIAN_01 - Water decontamination by sunlight-driven floating photocatalytic systems (SUNFLOAT) - BIANCHI, CLAUDIA LETIZIA MADDALENA - INTLI - Finanziamenti internazionali - 2020
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/934666
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