Design of a highly photocatalytically active ZnO/CuWO4 nanocompositeMatjaz Valant
, Saim Emin
, 2017, objavljeni povzetek znanstvenega prispevka na konferenci (vabljeno predavanje)
Opis: We report the synthesis, photocatalytic activity and mechanistic study of a novel heterostructure (HTS) with an efficient charge separation. A ZnO/CuWO4 HTS material is reported for the first time. The nanocomposite (NC) consists of CuWO4 nanoparticles (ca. 200-400 nm) decorated with ZnO nanorods (ca. 30 nm, 100 nm length) and is shown to be a highly active photocatalyst for decomposition of model contaminants including methyl orange and terephthalic acid. The ZnO/CuWO4 interface is shown to be the key for controlling the enhanced activity of the composite material. Transient absorption spectroscopy studies demonstrated that a photoinduced charge transfer across the ZnO/CuWO4 interface increased electron-hole lifetime by 3 orders of magnitude, from < 20 s in ZnO to 30 ms in the ZnO/CuWO4 NC sample. Our findings show that through interface design efficient HTS materials can be prepared for a wide range of photocatalytic applications.
Najdeno v: osebi
Ključne besede: CuWO4, nanocomposite, transient absorption spectroscopy
Objavljeno: 28.08.2017; Ogledov: 109; Prenosov: 0
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