使用硝酸镍溶液处理的烟梗丝作为模板,得到一系列Ni掺杂的具有丰富孔道结构的TiO₂材料(Ni-STiO₂)。采用X射线衍射、扫描电子显微镜、透射电子显微镜、氮气吸附-脱附分析、X-射线光电子能谱和紫外-可见漫反射光谱等手段对样品进行表征。结果表明,Ni的掺杂对材料的比表面积、禁带宽度有较大影响。在可见光照射下,研究了所制备材料对罗丹明B(Rh B)的光催化降解性能,结果发现,Ni与Ti的摩尔比为0.5%时制备的样品(0.5 Ni-STiO₂)对Rh B的光催化降解效果最好,其降解速率常数是未掺杂样品(STiO₂)的2.4倍。

A series of Ni-doped TiO₂ materials with rich pore structure are synthesized by using nickel nitrate solution treated tobacco stalks as templates.The samples are characterized by X-ray diffraction (XRD),scanning electron microscopy (SEM),transmission electron microscopy (TEM),nitrogen adsorption-desorption analysis,X-ray photoelectron spectroscopy (XPS) and UV-visible diffuse reflectance spectroscopy (UV-Vis DRS).The results show that Ni doping has great influence on the specific surface area and band gap width of the material.The performance of the materials in photocatalytic degradation of Rhodamine B (Rh B) is investigated under visible light irradiation.It is found that the sample prepared at a molar ratio of Ni to Ti being 0.5% (0.5 Ni-STiO₂) has the best photocatalytic degradation effect on Rh B,over which the degradation rate constant is 2.4 times that over the undoped sample (STiO₂).

唐石云(1984-),男,博士,助理研究员,主要从事烟草化学研究,tshiyun@126.com