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Synthesis of S-doped TiO2 by Sol-Gel Method and Its Visible Photocatalytic Activities(PDF)

《南京师大学报（自然科学版）》[ISSN:1001-4616/CN:32-1239/N]

Issue:
2007年04期
Page:
56-60
Research Field:
化学
Publishing date:

Info

Title:
Synthesis of S-doped TiO2 by Sol-Gel Method and Its Visible Photocatalytic Activities
Author(s):
Li Jie; Wang Yuping; Peng Panying
School of Chemistry and Environmental Science,Nanjing Normal University,Nanjing 210097,China
Keywords:
sol-gelmethod;  S-dop ing;  dop ing amount;  visible-light;  photodegradation
PACS:
O643.32
DOI:
-
Abstract:
S-doped TiO2 nanoparticleswere synthesized by sol-gelmethod with tetrabutyl titanate and thio- urea as p recursor. The S-TiO2 photocatalyst characterized by XRD, XPS, UV-Vis and the photocatalytic activity was evaluated by photo degradation of methylene blue and 1-naphthol-8-sulfonic acid under visible-light radiation. The results showed that doped S reduced energy band gap of TiO2 , thereby increasing the photocatalytivity in the visible-light region. The visible2light responding bound and photocatalytic activity of catalystwere affected by the dop ing amount. The 1.21% S doped TiO2 UV2Visible absorp tion band was about 450 nm, and the removal efficiency ofmethylene blue was the biggest. The concentration of the 1- naphthol-8-sulfonic acid was 10mg·L - 1 , and the photocatalytic degradation rate can reach 72.4% un- der visible-light illuminated 7 h with 1.2% S-TiO2. The average particle diameter of resultant S-TiO2 was about 7.4 nm and its crystal form was anatase. The formation of S atoms in S-TiO2 particles was determined to be mainly S 6 + and S 4 + from X-ray photoelectron spectra (XPS).

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Last Update: 2013-05-05