Enhanced photocatalytic activities of Nd-doped TiO₂ under visible light using a facile sol-gel method

Jicai Liang^1,2，Jingya Wang¹，Kexian Song²，Xiaofeng Wang³，Kaifeng Yu¹，Ce Liang¹

1. Key Laboratory of Automobile Materials,Ministry of Education,and College of Materials Science and Engineering,Jilin University2. Roll Forging Research Institute,Jilin University3. State Key Laboratory of Inorganic Synthesis and Preparative Chemistry,College of Chemistry,Jilin University

摘 要：Titanium dioxide nanoparticles modified with neodymium in the range of 1 mol% to 5 mol% were prepared with template-free sol-gel method.The structures of obtained samples were characterized by X-ray powder diffraction analysis.X-ray photoelectron spectroscopy,scanning electron microscopy,transmission electron microscopy and diffuse reflectance spectroscopy.The photocatalytic activity of the obtained samples was evaluated by photodegradation of methyl orange in aqueous solution under ultraviolet-visible（λ> 350 nm） and visible（λ> 420 nm） irradiation.The experimental results show that the 1 mol% Nd-doped TiO₂ exhibits the highest photocatalytic activity,of which the degradation can reach to 96.5% under visible irradiation.According to the XRD results,the pristine samples are combined with anatase TiO₂ and rutile TiO₂.while the Nd-doped TiO₂ samples are anatase TiO₂ only.This transformation has made an obvious promotion of photocatalyst activity after modification.

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