论文部分内容阅读
将制备好的{001}TiO_2与尿素混合,通过煅烧处理得到可见光响应的g-C_3N_4/{001}TiO_2。通过XRD、FT-IR和UV-Vis DRS来证实g-C_3N_4/{001}TiO_2复合催化剂的形成,并分别在紫外和可见光下考察其对NO的光催化氧化性能。结果表明:所制备的g-C_3N_4/{001}TiO_2对NO有明显的去除效果,且当g-C_3N_4质量比为10%时,其催化活性最高,在紫外光下分别是纯{001}TiO_2的2.4倍,是纯g-C_3N_4的4.1倍;在可见光下是纯g-C_3N_4的5.8倍。g-C_3N_4/{001}TiO_2复合催化剂活性增强的原因归结于两种主体材料的紧密复合,提高了载流子分离效率。
The prepared {001} TiO_2 is mixed with urea, and the visible light-responsive g-C_3N_4 / {001} TiO_2 is obtained by calcination. The formation of g-C_3N_4 / {001} TiO_2 composite catalysts was confirmed by XRD, FT-IR and UV-Vis DRS. The photocatalytic oxidation of NO was investigated under UV and visible light respectively. The results show that the prepared g-C_3N_4 / {001} TiO_2 has obvious removal effect on NO. When the mass ratio of g-C_3N_4 is 10%, the catalytic activity is the highest, and the pure {001} TiO_2 2.4 times that of pure g-C_3N_4 4.1 times; 5.8 times of pure g-C_3N_4 in visible light. The reason for the enhanced activity of g-C_3N_4 / {001} TiO_2 composite catalysts is attributed to the close compaction of the two host materials and the improvement of the carrier separation efficiency.