Solar light-assisted photocatalytic degradation of methylene blue with Mo/TiO2: a comparison with Cr- and Ni-doped TiO2

被引：57
|
作者：
Chaudhari, Sushil M. [1 ]
Gawal, Pramod M. [1 ]
Sane, Priyanka K. [1 ]
Sontakke, Sharad M. [1 ]
Nemade, Parag R. [1 ,2 ]
机构：
[1] Inst Chem Technol, Dept Chem Engn, Mumbai, Maharashtra, India
[2] Inst Chem Technol, Dept Oils Oleochem & Surfactant Technol, Mumbai, Maharashtra, India
来源：
RESEARCH ON CHEMICAL INTERMEDIATES | 2018年 / 44卷 / 05期
关键词：
Mo-doped TiO2; Cr-doped TiO2; Ni-doped TiO2; Dye degradation; MB; UV light; Visible light; DYES; OXIDATION; ANATASE; MO; NANOPARTICLES; RUTILE; ABSORPTION; NANOTUBES; PROPERTY; REMOVAL;
D O I：
10.1007/s11164-018-3296-1
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Highly active Cr-doped, Ni-doped and Mo-doped TiO2 photocatalysts were synthesized by a sol-gel method. The synthesized catalysts were characterized by UV-DRS, BET, XRD, FE-SEM-EDS, TEM and XPS. Metal doping decreased the band gap of TiO2 to 2.83 eV for Mo-doped TiO2 and Ni-doped TiO2. The activity of the synthesized photocatalysts was evaluated by studying the degradation of MB as a model pollutant under both UV and solar irradiation. The Mo/TiO2 catalyst achieved 98% degradation under solar light within 120 min. The activity of the catalysts was in the order Ni-doped TiO2 < Cr-doped TiO2 < TiO2 < Mo-doped TiO2. The optimum activity was found at a loading of 1.5 g/L of Mo-doped TiO2 under both UV and solar irradiation. The degradation was rapid at pH > 7 and followed pseudo-first order kinetics. Degradation by-products were analyzed on HR-LCMS and a mechanism is proposed.
引用
收藏
页码：3115 / 3134
页数：20
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