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Shape-Controlled photochemical synthesis of noble metal nanocrystals based on reduced graphene oxide
, Article ACS Applied Materials and Interfaces ; Volume 14, Issue 14 , 2022 , Pages 16527-16537 ; 19448244 (ISSN) ; Naseri, A ; Li, T ; Ostovan, A ; Asadian, E ; Jia, R ; Shi, L ; Huang, L ; Moshfegh, A. Z ; Sharif University of Technology
American Chemical Society
2022
Abstract
The fabrication of supported noble metal nanocrystals (NCs) with well-controlled morphologies have been attracted considerable interests due to their merits in a wide variety of applications. Photodeposition is a facile and effective method to load metals over semiconductors in a simple slurry reactor under irradiation. By optimizing the photodeposition process, the size, chemical states, and the geometrical distribution of metal NCs have been successfully tuned. However, metal NCs with well-controlled shapes through the photodeposition process have not been reported until now. Here, we report our important advances in the controlled photodeposition process to load regular noble metal NCs....
Pt nanoparticles decorated Bi-doped TiO2 as an efficient photocatalyst for CO2 photo-reduction into CH4
, Article Solar Energy ; Volume 211 , 15 November , 2020 , Pages 100-110 ; Khorasheh, F ; Larimi, A ; Sharif University of Technology
Elsevier Ltd
2020
Abstract
Pt@Bi-TiO2 photocatalysts with different Bi (0–5 wt%) and Pt (0–2 wt%) contents were prepared by a two-step sol-gel and photo-deposition technique and were used in photo-reduction of CO2. The synthesized catalysts were characterized by X-ray powder diffraction (XRD), UV–Vis diffuse reflectance spectroscopy (DRS), scanning and transmission electron microscopy (SEM and TEM), nitrogen sorption measurement (BET), Raman spectroscopy, Electron paramagnetic resonance (EPR) spectroscopy and photoluminescence spectroscopy (PL). CO2 photo-reduction results revealed that the introduction of Bi into TiO2 structure and subsequent loading of Pt on its surface significantly increased the methane yield....