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The origin of enhanced photocatalytic decomposition of ATP on TiO2 powders as induced by surface modification with lanthanide ions: important roles of ATP adsorption to the modified surface |
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| Authors: | Nahomi Sakaguchi Keiji Yamada Shuji Matsuo Taku Matsuo Hisanobu Wakita |
| Institution: | (1) Key Lab of Supramolecular Structure and Materials, College of Chemistry, Jilin University, 2699# Qian Jin Avenue, Changchun, 130012, People’s Republic of China;(2) Chemistry and Chemical Engineer Department, DaQing Normal University, Central Street, Daqing, Ranghulu District, 163712, People’s Republic of China;; |
| Abstract: | Surface modification of TiO2 powders with lanthanide salts (EuCl3 or YbCl3) enhanced photocatalytic decomposition of ATP. In comparison with the unmodified catalyst, a 3-fold increase in the ATP decay rate was observed with TiO2 powders as prepared in 5 mM EuCl3 (or YbCl3) solution. The reason was ascribed to enrichment of ATP to TiO2 powder with the lanthanide ions. Evidence was obtained by adsorption experiments where ATP concentration was monitored after dispersing TiO2 powders into the solution. The ATP molecules adsorbed faster to TiO2 powder and strongly stabilized there in the presence of Yb3+ than otherwise. |
| Keywords: | TIO2 PHOTOCATALYST LANTHANIDE ION ATP HPLC SURFACE MODIFICATION PHOTOCATALYTIC DECOMPOSITION ADSORPTION PHENOMENA |
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