Gliding Arc Plasma Synthesis of Crystalline TiO2 Nanopowders with High Photocatalytic Activity
Gliding Arc Plasma Synthesis of Crystalline TiO2 Nanopowders with High Photocatalytic Activity
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DOI：
10.1007/s11090-013-9470-8
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发表时间：
2013-07
影响因子：
3.6
通讯作者：
Shixin Liu;Xiao‐Song Li;Xiaobing Zhu;Tian-liang Zhao;Jing‐Lin Liu;Aimin Zhu
中科院分区：
文献类型：
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作者：
Shixin Liu;Xiao‐Song Li;Xiaobing Zhu;Tian-liang Zhao;Jing‐Lin Liu;Aimin Zhu
本文首次采用滑动弧放电产生的温等离子体合成了纳米TiO 2粉体，结合了热等离子体和冷等离子体的优点。空气被用作放电气体，四异丙醇钛气溶胶被N2携带到等离子体中。X射线衍射和X射线光电子能谱表征证实，合成的纳米粉体是完全结晶的TiO 2。随着比能输入（SEI）从46 kJ/mol增加到76 kJ/mol，金红石的质量分数（fA）从68.8%增加到96.8%。研究了纳米粉体的比表面积（SBET）和BET当量直径（dBET）对纳米粉体性能的影响。通过透射电子显微镜（TEM）观察到颗粒的典型球形形态，并且最可能的TEM接近dBET。所有合成的纳米粉体显示出与Degussa P25相当的高光催化活性。
A warm plasma generated by gliding arc discharge, combining the advantages of both thermal and cold plasmas, is explored to synthesize TiO2nanopowders for the first time. Air is used as the discharge gas and titanium tetraisopropoxide aerosol is carried by N2into the plasma. X-ray diffraction and X-ray photoelectron spectroscopy characterizations confirm that the as-synthesized nanopowders are fully crystalline TiO2. The weight fraction of anatase (fA) is higher than that of rutile and increases from 68.8 to 96.8 % by increasing specific energy input (SEI) from 46 to 76 kJ/mol. The effect ofSEIon specific surface area (SBET) and BET-equivalent diameter (dBET) of the nanopowders is investigated. The typically spheric morphology of the particles is observed by transmission electron microscopy (TEM) and the most probabledTEMapproaches thedBET. All the as-synthesized nanopowders show a high photocatalytic activity comparable to that of Degussa P25.