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Nd~(3+)-doped TiO_2 powders were prepared by the sol-gel method. Their crystal pattern and parameter, the specific surface area, the surface chemical state of Ti and the ratio of O/Ti were characterized. The results show that Nd impurity hinders the crystal transformation, and decreases the relative intensity of (101) peak. The crystallite sizes of Nd~(3+)-doped TiO_2 powders decrease while their specific surface area increase owing to the Nd~(3+) doping. The XPS measurement shows that the content of Ti(Ⅲ) and ratio of O/Ti on their surfaces increase significantly with the increase of Nd~(3+) dosage. The adsorption and photodegradation experiments show that the optimum molar content of Nd~(3+) is 1.2%.
Nd 3+ -doped TiO 2 powders were prepared by the sol-gel method. Their crystal pattern and parameter, the specific surface area, the surface chemical state of Ti and the ratio of O / Ti were characterized. Nd impurity hinders the crystal transformation, and decreases the relative intensity of (101) peak. The crystallite sizes of Nd ~ (3 +) - doped TiO 2 powders decrease while to specific surface area increase due to the Nd ~ (3+) doping. The XPS measurement shows that the content of Ti (III) and ratio of O / Ti on their surfaces increase significantly with the increase of Nd ~ (3+) dosage. The adsorption and photodegradation experiments show that the optimum molar content of Nd ~ ( 3+) is 1.2%.