Decomposition of NO in gas phase by gold nanoparticles supported on titanium dioxide synthesized by the deposition-precipitation method

作者：Hernandez Fernandez J^*; Zanella R; Aguilar Elguezabal A; Arizabalo R D; Castillo S; Moran Pineda M

来源：Materials Science and Engineering B-Solid State Materials for Advanced Technology, 2010, 174(1-3): 13-17.

DOI：10.1016/j.mseb.2010.03.023

• Titanium dioxide
• Gold
• Deposition-precipitation
• Photocatalysis
• Nitrogen monoxide

In the present work, the synthesis, characterization and photoactivity concerning the nitrogen monoxide (NO)decomposition of sol-gel Au/TiO(2) photocatalysts are reported.TiO(2) was prepared by gelling titanium (IV) isopropoxide, and gold nanoparticles were added by the deposition-precipitation method with urea. The catalysts with different gold concentrations were characterized by the following techniques: BET, XRD, UV-vis and dark-field TEM. It was found that by using this synthesis method, a high dispersion of gold nanoparticles on TiO(2) was reached (4.4-6.7 nm), and the obtained structure lead to a band gap energy that is lower than the one observed for undoped TiO(2). A NO + O(2) mixture (150 ppm) was used to evaluate the photocatalytic activity in situ, at room temperature, under atmospheric pressure and a UV lamp was used as radiation source. The photocatalytic conversion of nitrogen monoxide (NO) was followed by FTIR, which reached 96% in 60 min. The Au/TiO(2) materials showed an enhanced photocatalytic activity when compared with the reference TiO(2).

• 出版日期2010-10-25