Anatase/rutile bi-phasic titanium dioxide nanoparticles for photocatalytic applications enhanced by nitrogen doping and platinum nano-islands
Anatase/rutile bi-phasic titanium dioxide nanoparticles for photocatalytic applications enhanced by nitrogen doping and platinum nano-islands
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DOI：
10.1016/j.jcis.2015.08.027
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发表时间：
2015-12-15
影响因子：
9.9
通讯作者：
Dunnill, Charles W.
中科院分区：
文献类型：
--
作者：
Bear, Joseph C.;Gomez, Virginia;Dunnill, Charles W.
采用连续层溶胶-凝胶沉积技术在可溶衬底上制备了含有锐钛矿型和金红石型异质结的二氧化钛(TiO2O2)双相粉末。金红石和锐钛矿型二氧化钛的连续薄膜被沉积在氯化钠基片上，产生了极其脆弱的复合层状圆盘，在基片溶解时破碎成“Janus样”粉末。还制备了氮掺杂和铂溅射的类似物，并利用紫外光和可见光照射下的模型有机污染物罗丹明B的光催化性能进行了分析。用X射线衍射仪、X射线光电子能谱、能量色散X射线能谱、拉曼光谱和扫描电子显微镜对材料进行了表征。这篇论文阐明了锐钛矿型和金红石型材料直接接触时的关系，并展示了一种稳健的方法来合成表面上由任何两种材料组成的双相纳米颗粒，用于光催化反应或其他方面。(C)2015 Elsevier Inc.保留所有权利。
Titanium dioxide (TiO2) bi-phasic powders with individual particles containing an anatase and rutile hetero-junction have been prepared using a sequential layer sol gel deposition technique to soluble substrates. Sequential thin films of rutile and subsequently anatase TiO2 were deposited onto sodium chloride substrates yielding extremely fragile composite layered discs that fractured into "Janus-like" like powders on substrate dissolution. Nitrogen doped and platinum sputtered analogues were also prepared, and analysed for photocatalytic potential using the photodegradation of Rhodamine B, a model organic pollutant under UV and visible light irradiation. The materials were characterised using X-ray diffraction, X-ray photoelectron spectroscopy, energy dispersive X-ray spectroscopy, Raman spectroscopy and scanning electron microscopy. This paper sheds light on the relationship between anatase and rutile materials when in direct contact and demonstrates a robust method for the synthesis of bi-phasic nanoparticles, ostensibly of any two materials, for photocatalytic reactions or otherwise. (C) 2015 Elsevier Inc. All rights reserved.