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采用溶胶-凝胶法制备了La_(1-x)Ce_xNiO_3/凹凸棒石(ATP)复合材料。通过X射线衍射、透射电镜、Fourier变换红外光谱仪和紫外可见漫反射谱等方法对复合材料的结构、物化性质进行表征,并将其运用到光耦合脱硝中,探讨不同参数对氮氧化物去除率的影响。结果表明:载体凹凸棒石独特的孔道结构不仅可以增强对气体分子的吸附,还可以增强材料的光催化稳定性。当Ce~(3+)的掺杂量x为0.1时,La_(1-x)Ce_xNiO_3/ATP以固溶体的形式均匀分布在ATP表面,当掺杂量超过0.1时,有CeO_2相析出,与La_(1-x)Ce_xNiO_3在ATP表面形成异质结结构,当掺杂量为0.3时,复合材料的光催化活性最高,达到80%。
La_ (1-x) Ce_xNiO_3 / attapulgite (ATP) composites were prepared by sol-gel method. The structure and physicochemical properties of the composites were characterized by X-ray diffraction, transmission electron microscopy, Fourier transform infrared spectroscopy and UV-visible diffuse reflectance spectroscopy, and applied to the optical coupling denitration. The effects of different parameters on the removal of nitrogen oxides Impact. The results show that the unique pore structure of attapulgite can not only enhance the adsorption of gas molecules, but also enhance the photocatalytic stability of the material. When the doping amount of Ce 3+ is 0.1, La 1-x Ce x NiO 3 / ATP is uniformly distributed on the surface of ATP as a solid solution. When the doping amount exceeds 0.1, CeO 2 phase precipitates, (1-x) Ce_xNiO_3 formed a heterojunction structure on the surface of ATP. When the doping amount was 0.3, the photocatalytic activity of the composite was the highest (80%).