Size-controllable synthesis of catalyst of gold nanoparticles supported on TiO2 by using sonoelectrochemical methods

作者：Lo Tsui Yun; Yu Chung Chin; Liu Yu Chuan^*; Yang Kuang Hsuan; Chen Qing Ye

来源：Materials Research Bulletin, 2013, 48(2): 920-922.

DOI：10.1016/j.materresbull.2012.11.061

• Inorganic compounds
• Chemical synthesis
• Catalytic properties

In this work, size-controllable Au NPs-coated TiO2 are synthesized by adjusting the pH of solutions based on sonoelectrochemical methods. The size-controlled Au NPs on TiO2, ranging from 2 to 80 nm in diameter, can be obtained by varying the pH of solutions from 3 to 7 and further placement for 3 h before sonoelectrochemical reductions. Experimental results indicate that the catalytic activity of synthesized Au NPs for the decomposition of acetaldehyde in solution increases with a decrease of particle size. However, bigger Au NPs with 80 nm in diameter still demonstrate slight activity for the decomposition of acetaldehyde due to the formation of Au/TiO2 nanocomposites.

• 出版日期2013-2