Synthesis and photocatalytic activity of sulfate modified Nd-doped TiO2 under visible light irradiation

被引：20
作者：
Sun Dongfeng [1 ]
Wang Kai [2 ]
Xu Zhijian [2 ]
Li Ruixing [1 ]
机构：
[1] Beihang Univ, Sch Mat Sci & Engn, Key Lab Aerosp Mat & Performance, Minist Educ, Beijing 100191, Peoples R China
[2] Dalian Univ, Coll Phys Sci & Technol, Dalian 116622, Peoples R China
来源：
JOURNAL OF RARE EARTHS | 2015年 / 33卷 / 05期
基金：
中国国家自然科学基金;
关键词：
TiO2; solid superacid; photocatalyst; visible light; methylene blue; rare earths; RARE-EARTH-ELEMENTS; DIPYRIDOPHENAZINE DERIVATIVES; TITANIA; DEGRADATION; QUINOXALINE; TEMPERATURE; TRANSITION; PHASE; CE;
D O I：
10.1016/S1002-0721(14)60446-4
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
Nd-doped TiO2 (NT) photocatalysts with different contents of Nd were synthesized by sol-gel method. Then sulfated Nd-doped TiO2 (SNT) solid superacid photocatalysts were prepared by an incipient wetness impregnation technique. The photocatalytic activity of catalysts was evaluated by the photodegradation of methylene blue under visible light irradiation. Analytical results demonstrated that Nd doping inhibited the growth of TiO2 crystallite and enhanced the thermal stability of anatase TiO2. Meanwhile, sulfate ions modification increased the specific surface area of samples. In addition, the optical absorption edges of SNT photocatalysts shifted to longer wavelength compared with the undoped TiO2. Such SNT with Nd dosage of 0.25 at.% exhibited the highest photocatalytic activity in the degradation of methylene blue upon irradiation with visible light.
引用
收藏
页码：491 / 497
页数：7
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