Surface ζ potential and photocatalytic activity of rare earths doped TiO2
来源期刊：JOURNAL OF RARE EARTHS2008年第5期
论文作者：SONG Mianxin BIAN Liang ZHAO Xiaoyong ZHOU Tianliang
Key words：iso-electric point; TiO2; ζ potential; photocatalytic activity; rare earths;
Abstract: The iso-electric point of different rare earths (La, Ce, Y) doped anatase TiO2 was set out, and three organisms with different sur-face electrical properties (methylene blue trihydrate-positive electricity, methyl orange-negative electricity, methyl red-neutral electricity) were selected as photodegradable models. The result showed that the photocatalytic activity of 0.5wt.%Y ions doped anatase TiO2 was better than those of the others. The relationship between Zeta (ζ) potential and the photocatalytic activity of different RE doped anatase TiO2 were also investigated. The Y-doped anatase TiO2 was found with the special two iso-electric points and three ζ potential values.
SONG Mianxin1，BIAN Liang1，ZHAO Xiaoyong1，ZHOU Tianliang2
(1.Key Laboratory For Advanced Building Materials of Sichuan Province,South West University of Science and Technology,Mianyang 621010,China;
2.Baotou Research Institute of Rare Earths,Baotou 014010,China)
Abstract:The iso-electric point of different rare earths (La, Ce, Y) doped anatase TiO2 was set out, and three organisms with different sur-face electrical properties (methylene blue trihydrate-positive electricity, methyl orange-negative electricity, methyl red-neutral electricity) were selected as photodegradable models. The result showed that the photocatalytic activity of 0.5wt.%Y ions doped anatase TiO2 was better than those of the others. The relationship between Zeta (ζ) potential and the photocatalytic activity of different RE doped anatase TiO2 were also investigated. The Y-doped anatase TiO2 was found with the special two iso-electric points and three ζ potential values.
Key words:iso-electric point; TiO2; ζ potential; photocatalytic activity; rare earths;
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