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Synthesis of carbon-doped photocatalytic TiO<sub>2</sub> nano-powders by AFD process
Lim, G.T.,Kim, K.H.,Park, J.,Ohk, S.H.,Kim, J.H.,Cho, D.L. Korean Society of Industrial and Engineering Chemi 2010 Journal of industrial and engineering chemistry Vol.16 No.5
Carbon-doped titanium dioxide (TiO<SUB>2</SUB>) nano-powders were synthesized by the aerosol flame deposition (AFD) process using 2-butanol liquid sol containing 20wt% of titanium isopropoxide (TTIP). They were mesoporous nano-powders with particle size ranging from 20 to 40nm, the specific surface area of 36m<SUP>2</SUP>/g, and the pore size of 19nm. They had the anatase structure and showed high photocatalytic activity not only under UV-A light but also under fluorescent light. They reduced the concentration of methylene blue (MB) from 5.0 to 1.5ppm within 2h under UV-A light and from 5.0 to 2.0ppm within 4h under fluorescent light. And, they killed 99% of Escherichia coli (E. coli) cells within 2h and bacterial growth of the E. coli was not observed for 12h under both UV-A and fluorescent lights.
Synthesis of carbon-doped photocatalytic TiO2 nano-powders by AFD process
임경택,Kyung Hwan Kim,Jun Park,Seung-Ho Ohk,김종호,Dong Lyun Cho 한국공업화학회 2010 Journal of Industrial and Engineering Chemistry Vol.16 No.5
Carbon-doped titanium dioxide (TiO2) nano-powders were synthesized by the aerosol flame deposition (AFD) process using 2-butanol liquid sol containing 20 wt% of titanium isopropoxide (TTIP). They were mesoporous nano-powders with particle size ranging from 20 to 40 nm, the specific surface area of 36 m2/g, and the pore size of 19 nm. They had the anatase structure and showed high photocatalytic activity not only under UV-A light but also under fluorescent light. They reduced the concentration of methylene blue (MB) from 5.0 to 1.5 ppm within 2 h under UV-A light and from 5.0 to 2.0 ppm within 4 h under fluorescent light. And, they killed 99% of Escherichia coli (E. coli) cells within 2 h and bacterial growth of the E. coli was not observed for 12 h under both UV-A and fluorescent lights. 2010 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
Grandhe, Bhaskar Kumar,Bandi, Vengala Rao,Jang, Kiwan,Ramaprabhu, S.,Lee, Ho-Sueb,Shin, Dong-Soo,Yi, Soung-Soo,Jeong, Jung-Hyun Elsevier 2012 Composites. Part B, Engineering Vol.43 No.3
<P><B>Abstract</B></P> <P>YVO<SUB>4</SUB>:Eu<SUP>3+</SUP> nanocomposites have been synthesized by means of a modified co-precipitation method (CP-CNT). Multi walled carbon nanotubes (MWCNT’s) have been employed in the synthesis of the YVO<SUB>4</SUB>:Eu<SUP>3+</SUP> nanocomposites to enhance its photoluminescence efficiency. The prepared nanocomposites were thoroughly characterized using the characterization techniques namely XRD, SEM, FTIR and Raman scattering. To evaluate the potentiality of the prepared nanocomposites, the same phosphor has also been prepared by using co-precipitation (CP) method without employing multi walled carbon nanotubes and also by means of conventional solid state reaction method (SSR). The photoluminescence spectra of YVO<SUB>4</SUB>:Eu<SUP>3+</SUP> nanocomposites have shown stronger red emission at 619nm (<SUP>5</SUP>D<SUB>0</SUB> → <SUP>7</SUP>F<SUB>2</SUB>) for both the excitation wavelengths (254 and 393nm) than the other two prepared samples. The effect of MWCNT’s on photoluminescent properties of the YVO<SUB>4</SUB>:Eu<SUP>3+</SUP> nanocomposites is also explained.</P>