Immobilized Sandwich-Type Polyoxometalates [Mn4(XW9O34)2]n- on Tb-Doped TiO2 Nanoparticles as Efficient and Selective Catalysts in the Oxidation of Sulfides and Alcohols

被引：15
作者：
Gholamyan, Sahar [1 ]
Khoshnavazi, Roushan [1 ]
Rostami, Amin [1 ]
Bahrami, Leila [1 ]
机构：
[1] Univ Kurdistan, Dept Chem, POB 66135-416, Sanandaj, Iran
来源：
CATALYSIS LETTERS | 2017年 / 147卷 / 01期
关键词：
Sandwich-type polyoxometalates; Support; Ln-doped TiO2; Nanocomposite; Homogeneous catalyst; Hydrogen peroxide; Oxidation; Sulfides; Alcohols; PHASE-TRANSFER CATALYST; ORGANIC-SOLVENT-FREE; HYDROGEN-PEROXIDE; MAGNETIC-PROPERTIES; HIGHLY EFFICIENT; MODIFIED SBA-15; EPOXIDATION; ACID; SULFOXIDES; H2O2;
D O I：
10.1007/s10562-016-1896-1
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：
Sandwich-type polyoxometalates of [M-4(XW9O34)(2)](n-) (M = Mn2+, Cu2+, Zn2+, X = Ge4+, P5+, As5+) supported on Ln-doped TiO2 (Ln = Nd3+, Sm3+, Tb3+ and Dy3+) nanoparticles were prepared and their catalytic activities examined for oxidation of sulfides and alcohols. Results show that the catalytic activities of new nanocomposites were significantly higher than homogeneous conditions with corresponding sandwich-type polyoxometalates. The best results obtained by [Mn-4(XW9O34)(2)](10-) (X = P5+, As5+) supported on Tb/TiO2 which were characterized by various techniques. The catalysts can be easily recovered and reused for at least five times without obvious decrease of catalytic activities and the structures of the catalysts remain unchanged after recycling and the yields for catalyst recovery are all above 95%. [GRAPHICS]
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页码：71 / 81
页数：11
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