纳米晶锐钛矿型TiO₂与多孔纳米LaFeO₃耦合用于污染物的高效可见光光催化降解

Coupling of Nanocrystalline Anatase TiO₂ to Porous Nanosized LaFeO₃ for Efficient Visible-Light Photocatalytic Degradation of Pollutants.

作者信息

Humayun Muhammad, Li Zhijun, Sun Liqun, Zhang Xuliang, Raziq Fazal, Zada Amir, Qu Yang, Jing Liqiang

机构信息

Key Laboratory of Functional Inorganic Materials Chemistry, Ministry of Education, School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, China.

出版信息

Nanomaterials (Basel). 2016 Jan 20;6(1):22. doi: 10.3390/nano6010022.

In this work we have successfully fabricated nanocrystalline anatase TiO₂/perovskite-type porous nanosized LaFeO₃ (T/P-LFO) nanocomposites using a simple wet chemical method. It is clearly demonstrated by means of atmosphere-controlled steady-state surface photovoltage spectroscopy (SPS) responses, photoluminescence spectra, and fluorescence spectra related to the formed OH radical amount that the photogenerated charge carriers in the resultant T/P-LFO nanocomposites with a proper mole ratio percentage of TiO₂ display much higher separation in comparison to the P-LFO alone. This is highly responsible for the improved visible-light activities of T/P-LFO nanocomposites for photocatalytic degradation of gas-phase acetaldehyde and liquid-phase phenol. This work will provide a feasible route to synthesize visible-light responsive nano-photocatalysts for efficient solar energy utilization.

在本工作中，我们采用简单的湿化学方法成功制备了纳米晶锐钛矿型TiO₂/钙钛矿型多孔纳米LaFeO₃（T/P-LFO）纳米复合材料。通过与形成的OH自由基量相关的气氛控制稳态表面光电压光谱（SPS）响应、光致发光光谱和荧光光谱清楚地表明，与单独的P-LFO相比，具有适当摩尔百分比TiO₂的所得T/P-LFO纳米复合材料中的光生电荷载流子显示出更高的分离度。这对T/P-LFO纳米复合材料在光催化降解气相乙醛和液相苯酚方面可见光活性的提高起到了很大作用。这项工作将为合成用于高效太阳能利用的可见光响应纳米光催化剂提供一条可行的途径。