Interfacial coupling effects on adsorptive and photocatalytic performances for photoresponsive graphene wrapped-SrTiO 3 @Ag under UV-visible light: experimental and DFT approach - Archive ouverte HAL Access content directly
Journal Articles Environmental Science and Pollution Research Year : 2022

Interfacial coupling effects on adsorptive and photocatalytic performances for photoresponsive graphene wrapped-SrTiO 3 @Ag under UV-visible light: experimental and DFT approach

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Abstract

Understanding the graphene/semiconductor/metal interactions is crucial to design innovative photocatalytic materials with efficient photocatalytic activity for environmental cleanup applications. SrTiO 3 on reduced graphene oxide (rGO) with various graphene contents was successfully synthesized in this study utilizing a simple hydrothermal method, followed by decorating the surface with Ag particles by using the photodeposition process. Under UVvisible light irradiation, the resulting composites were tested for their improved photocatalytic activity to decompose methylene blue (MB). The prepared photocatalysts were characterized by XRD, SEM, EDX, DLS, FT-IR, Raman spectroscopy, and DRS. First-principles density functional theory calculations (DFT) were also carried out by using the generalized gradient approximation (GGA) and PBE functional with the addition of on-site Coulomb correction (GGA + U). The obtained SrTiO 3 /rGO@Ag composites showed great improvement in the photocatalytic performances over pristine SrTiO 3. For the degradation reaction of MB,SrTiO 3 /rGO 20% @Ag 4% composites yielded the best photocatalytic activity with efficacy reach 94 %, which was also shown that it could be recycled up to four times with nearly unchanged photocatalytic activity.
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hal-03589904 , version 1 (26-02-2022)

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Mohamed Khalil Guediri, Derradji Chebli, Abdallah Bouguettoucha, Riadh Bourzami, Abdeltif Amrane. Interfacial coupling effects on adsorptive and photocatalytic performances for photoresponsive graphene wrapped-SrTiO 3 @Ag under UV-visible light: experimental and DFT approach. Environmental Science and Pollution Research, 2022, 29 (19), pp.28098-28114. ⟨10.1007/s11356-021-17543-x⟩. ⟨hal-03589904⟩
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