Izvorni znanstveni članak
Single-Step Synthesis of LaMnO3/MWCNT Nanocomposites and Their Photocatalytic Activities
Hao Huang
; State Key Laboratory of Metastable Materials Science & Technology, Yanshan University, Qinhuangdao, P.R. China
Guangren Sun
; State Key Laboratory of Metastable Materials Science & Technology, Yanshan University, Qinhuangdao, P.R. China
Jie Hu
; State Key Laboratory of Metastable Materials Science & Technology, Yanshan University, Qinhuangdao, P.R. China; Hebei Key Laboratory of Applied Chemistry, School of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao, P.R. China
Tifeng Jiao
; Hebei Key Laboratory of Applied Chemistry, School of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao, P.R. China; National Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Be
Sažetak
Composites of the nano‐sized perovskite‐type oxide of LaMnO3 and multi‐walled carbon nanotubes (MWCNTs) were synthesized in a single step using the sol‐gel method. Their photocatalytic activities for the degradation of various water‐soluble dyes under visible light were evaluated. The prepared samples were characterized by thermogravimetry analysis, scanning electron microscopy, transmission electron microscopy, X‐ray diffraction, photoluminescence spectroscopy and UV‐vis diffused spectroscopy. Results showed that LaMnO3 nanoparticles grew on the surface of MWCNTs with a grain size of around 20 nm. Photocatalysis measurements revealed that the LaMnO3/MWCNT nanocomposites had greater photocatalytic activities than pure LaMnO3 nanoparticles, and the mass percentage of MWCNTs showed that 9.4% possessed the highest photocatalytic activity. These results indicate that LaMnO3/MWCNT nanocomposites are promising candidates as highly effective photocatalysts.
Ključne riječi
carbon nanotubes; nanocomposites; perovskite-type structure; photocatalysis
Hrčak ID:
142639
URI
Datum izdavanja:
1.1.2014.
Posjeta: 1.269 *