Photo Catalytic Degradation of Imidachloprid Under Solar Light Using Metal Ion Doped TiO2 Nano Particles: Influence of Oxidation State and Electronic Configuration of Dopants

被引：28

作者：

Devi, L. Gomathi ^{[1
]}

Murhty, B. Narasimha ^{[1
]}

Kumar, S. Girish ^{[1
]}

机构：

[1] Bangalore Univ, Dept Post Grad Studies Chem, Bangalore 560001, Karnataka, India

来源：

CATALYSIS LETTERS | 2009年 / 130卷 / 3-4期

关键词：

Stabilization of anatase phase in TiO2; Th4+ doping; V5+ and Mo6+ doping; Imidachloprid; Photodegradation under solar light; PHOTOCATALYTIC DEGRADATION; AQUEOUS SUSPENSION; BAND-GAP; TITANIA; PHASE;

D O I：

10.1007/s10562-009-9938-6

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Anatase TiO2 was doped with metal ions like Th4+, V5+ and Mo6+ and tested for the degradation of imidachloprid under solar light. X-ray diffraction results inferred that all the dopants stabilized the anatase phase irrespective of their nature, oxidation state and ionic size. The undoped and transition metal ion doped TiO2 were completely transformed to rutile phase at 700 degrees C while rare earth Th4+ doped sample completely transformed to rutile phase at 1,000 degrees C. The rare earth dopant stabilized the anatase phase by hindering the growth of crystallite size. Among the photo catalysts used, Th4+ (0.06%)-TiO2 showed highest activity and its efficiency was 2.8 times higher than that of Degussa P-25. The Th4+ ion lowered the band gap of TiO2 to 2.6 and 2.5 eV facilitating solar light absorption. Detrapping of the trapped charge carriers depends on electronic configuration and the oxidation state of the dopants.

引用

页码：496 / 503

页数：8

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