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Preparation of high surface area LaTiO2N photocatalyst |
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| Authors: | Huashun Zhang Yaogang Li Qinghong Zhang Hongzhi Wang |
| Affiliation: | aEngineering Research Center of Advanced Glasses Manufacturing Technology, College of Materials Science and Engineering, Donghua University, Shanghai 201620, People's Republic of China;bState Key Laboratory of High Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academy of Science, Shanghai 200050, People's Republic of China |
| Abstract: | Nanocrystalline LaTiO2N with a surface area of 27.5 m2/g was synthesized by nitridation of amorphous La2O3/TiO2 composite powder at 900 °C for 8 h using NH3 as the reactant gas. X-ray powder diffraction (XRD) and transmission electron microscopy (TEM) results revealed that the as-prepared LaTiO2N nanocrystals had a mean diameter of about 30 nm. It was found that the absorption edge of the oxynitride is significantly red-shifted compared with that of La2Ti2O7 as increasing the nitridation temperature. The UV–vis absorption spectra indicated that the synthesized oxynitrides displayed good light absorption properties not only in the ultraviolet light but also in the visible-light region. |
| Keywords: | Photocatalyst Red-shift Visible light Oxynitride Large surface area |
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