催化学报

催化学报 ›› 2011, Vol. 32 ›› Issue (4): 699-703.DOI: 10.3724/SP.J.1088.2011.01216

• 研究论文 • 上一篇    

以酚醛树脂为碳源的碳改性 TiO2 可见光光催化剂

陈立静, 王婷, 陈锋*, 张金龙   

  1. 华东理工大学精细化工研究所结构可控先进功能材料及其制备教育部重点实验室, 上海 200237
  • 收稿日期:2010-12-09 修回日期:2011-02-18 出版日期:2011-04-18 发布日期:2014-08-30

Carbon-Modified TiO2 Visible Light Photocatalyst Prepared Using Phenolic Resin as Carbon Source

CHEN Lijing, WANG Ting, CHEN Feng*, ZHANG Jinlong   

  1. Key Laboratory for Advanced Materials and Institute of Fine Chemicals, East China University of Science and Technology, Shanghai 200237, China
  • Received:2010-12-09 Revised:2011-02-18 Online:2011-04-18 Published:2014-08-30

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摘要： 以合成的水溶性酚醛树脂 (PF) 和 TiO2 为原料, 在 N2 气氛下焙烧制备了碳改性 TiO2催化剂 PF/TiO2, 并采用 X 射线衍射、扫描电子显微镜、X 射线光电子能谱和紫外-可见漫反射吸收光谱对样品进行了表征. 结果表明, PF/TiO2催化剂具有和原料 TiO2相同的晶相和形貌, 且在可见光区产生明显的吸收. 另外, 在样品表面存在 Cn, C–OH(C–O–C) 和 C=O(COO) 物种, 表明其表面存在石墨 C 材料. 这证实沉积在 TiO2 表面的 PF 在焙烧过程中发生了碳化. 以甲基橙为模型污染物, 在可见光下评价了 PF/TiO2 的光催化性能, 发现 PF/TiO2 的光催化剂活性大大高于 TiO2. 当 PF 用量为 2% 时, PF/TiO2 中碳含量为 1.33%, 此时催化剂的可见光光催化活性最高.

关键词: 二氧化钛, 酚醛树脂, 碳改性, 光催化, 可见光

Abstract: A carbon-modified titanium dioxide photocatalyst, PF/TiO2, was prepared by calcining self-prepared phenolic resin (PF) and TiO2 in N2 atmosphere. The as-prepared PF/TiO2 samples were characterized by X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy (XPS), and UV-Vis diffuse reflectance spectroscopy. PF/TiO2 has similar crystal phase and morphology to raw TiO2 and has significant absorption in the visible region. The XPS observed the presence of Cn, C–OH(C–O–C), and C=O(COO) species, which confirms that there is graphite carbonaceous matter on the surface of PF/TiO2. During the calcination, the phenolic resin on the surface of PF/TiO2 has been carbonized. The photocatalytic performance of PF/TiO2 under visible light was evaluated by the degradation of methyl orange. The photocatalytic activity of PF/TiO2 is greatly higher than that of bare TiO2. The PF dosage for preparing PF/TiO2 with the highest visible light photocatalytic activity is 2%, corresponding to a carbonaceous matter content of 1.33% in PF/TiO2.

Key words: titania, phenolic resin, carbon modification, photocatalysis, visible light