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分别采用不同的碳源制备得到碳掺杂TiO2,并采用X射线衍射、扫描电镜、紫外-可见吸收光谱和BET液氮吸附对碳掺杂TiO2的物相、粒径、吸收波长阀值和比表面积进行了表征。以苯酚溶液为催化降解对象,测定了不同碳源掺杂TiO2的可见光催化活性。结果表明:相对于以蔗糖为碳源制备碳掺杂TiO2,使用酚醛树脂能有效的阻止TiO2纳米材料在煅烧过程中的团聚,其制备得到的C-TiO2粒径小,比表面积大,吸收光波长红移较为明显,并在可见光存在条件下,3h能降解超过90%的苯酚,高于商品化的催化剂P25。
Carbon-doped TiO2 was prepared by using different carbon sources. X-ray diffraction, scanning electron microscopy, ultraviolet-visible absorption spectroscopy and BET liquid nitrogen adsorption were used to study the phase, particle size, absorption wavelength threshold and ratio Surface area was characterized. The photocatalytic activity of TiO2 doped with different carbon sources was measured by using phenol solution as catalyst. The results showed that, compared with the carbon-doped TiO2 with sucrose as the carbon source, the use of phenolic resin can effectively prevent the agglomeration of TiO2 nanomaterials during calcination. The prepared C-TiO2 has the advantages of small particle size, large specific surface area, The red shift of the wavelength is obvious, and in the presence of visible light, it can degrade more than 90% of phenol in 3h, which is higher than that of commercial catalyst P25.