SrTiO3/g-C3N4 mesostructured heterojunctions for photocatalytic evaluation using methylene blue

• Published in: Materials letters Vol. 352; p. 135183
• Main Authors: Córdova-Almeida, Francisco Javier, Rajput, Darshana, Torres-Torres, J.G., Gallardo- Hernández, S., Cervantes-Uribe, Adrián, Diaz-Real, Jesús A., Godavarthi, Srinivas, Oza, Goldie
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01-12-2023
• ISSN: 0167-577X; 1873-4979
• DOI: 10.1016/j.matlet.2023.135183

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•SrTiO3/g-C3N4 heterojunctions were synthesized via hydrothermal method.•97% photocatalytic degradation of methylene blue under visible light irradiation.•Optimal SrTiO3 to C3N4 ratio in SrTiO3/g-C3N4 heterojunction established via rate kinetics.
SrTiO3/g-C3N4 mesostructured heterojunctions were synthesized using hydrothermal method with different weight percentages of SrTiO3 (ST) in carbon nitride (CN). The samples are named as CN-ST05, CN-ST10, CN-ST15, CN-ST20, and CN-ST25 based on 5, 10, 15, 20 and 25 wt% of ST respectively in CN. The surface area of the heterojunctions ranged between 33.7 to 63.4 m2/gm. The optical, structural, and elemental properties of the heterojunctions were evaluated. Finally, the photocatalytic tests confirmed that CN-ST15 showed 97% degradation of methylene blue (MB) after 4 h of visible light irradiation, (the bare CN and ST showed 70% and 34% degradation respectively). The photocatalytic activity for methylene blue degradation followed the trend: CN-ST15 > CN-ST10 ≈ CN-ST20 > CN-ST25 > CN-ST05 > CN > ST.