New insight for enhancing photocatalytic activity of MWCNT/TiO₂ by decorating palladium nanoparticles as charge-transfer channel

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• 作者：Feng-Jun Zhang^a ; ^b ; ^{zhang-fengjun@hotmail.com} ; Won-Chun Oh^b ; ^{wc_oh@hanseo.ac.kr} ; Kan Zhang^b ; ^c
• 关键词：Composites ; X-ray diffraction ; Interfaces ; Surface properties ; Catalytic properties
• 刊名：Materials Research Bulletin
• 出版年：2012
• 期刊代码：60_00255408
• 类别：ms
• 出版时间：March, 2012
• 卷：47
• 期：3
• 页码：619-624
• 文件大小：1076 K

摘要

A surface bond-grafted multi-walled carbon nanotube (MWCNT)/TiO₂ as supporter, palladium nanoparticles, approximately 3 nm in diameter, are uniformly deposited on the functional MWCNT surface in first, constructing a novel Pd-MWCNT/TiO₂ photocatalyst for photocatalytic solar conversion. The characterization of photocatalysts by a series of joint techniques, including BET surface area, scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), energy dispersive X-ray (EDX), Raman spectroscopy and ultraviolet/visible (UV/vis) diffuse reflectance spectra, discloses that palladium nanoparticles has a crucial role in enhancement of photocatalytic activity of MWCNT/TiO₂, that is to act as a charge transfer channel, which helps to trap electrons from MWCNT to TiO₂.