Dual-Channel Charge Carrier Transfer in CsPbX3 Perovskite/W18O49 Composites for Selective Photocatalytic Benzyl Alcohol Oxidation
Year: 2021
Type: article
Abstract: The selective oxidation of benzyl alcohol to benzaldehyde using oxygen (O 2 ) as the oxidant is a reaction of critical importance in the organic industry. In this study, CsPbX 3 /W 18 O 49 composites with varying band gap energies were synthesized using an in situ solvothermal method. The abundant oxygen vacancies in W 18 O 49 extend the light response of the composite materials to the yellow and red part of the visible light region and result in a localized surface plasmon resonance (LSPR) effect, boosting the charge transfer. The composites exhibit high selectivity (>99%) and a conversion up to 72%, which is 11, 10, and 2.5 times higher than that of pure CsPbCl 3, CsPbBr 3, and W 18 O 49, respectively. The composites’ boosted photocatalytic activity is related to a highly efficient dual-channel charge carrier transfer, governed by both a type-II heterojunction mechanism as well as the LSPR effect.
Source: ACS Applied Energy Materials
Institution: KU Leuven
Language: English
Field: Energy
Domain: Physical Sciences
Open Access status: green
Awards: G1267178346, ENTREPRENEURING DYNAMIC SELF-ORGANIZED INTERFACES IN PHOTOCATALYSIS: A MULTIDISCIPLINARY TRAINING NETWORK CONVERTING LIGHT INTO PRODUCTS, G2233898191, G3603785904, G4693075401, G558596523, Structural and Optical Studies of GaAs1-xBix and Bi2O3 for optoelectronic devices., Single Particle Microscopy & Spectroscopy of Morphology and Size Controlled Perovskite crystals: PEROVSKOPY
OpenAlex ID: W3140714742