Hierarchical mesoporous phosphorus and nitrogen doped titania materials: Synthesis, characterization and visible-light photocatalytic activity

作者：Shao Gao Song; Wang Feng Yun; Ren Tie Zhen; Liu Yuping; Yuan Zhong Yong^*

来源：Applied Catalysis B: Environmental , 2009, 92(1-2): 61-67.

DOI：10.1016/j.apcatb.2009.07.024

• Mesoporous
• Titania
• Phosphorus
• Nitrogen
• Photoactivity

Hierarchical mesoporous P- and N-doped titanias were synthesized by the direct phosphation from phosphoric acid and the following nitridation with urea solution. The resulting materials were characterized by XRD, nitrogen adsorption, SEM, TEM, UV-vis, FT-IR and XPS analysis, and their photocatalytic activities were tested by the visible-light photodegradation of Rhodamine B solution. A bimodal mesopore size distribution with a macroporous structure was observed, rendering high surface area with thermal stability. N-doping of the hierarchical mesoporous titania resulted in the band-gap narrowing with improved photocatalytic activity. However, the phosphated titania exhibited higher photocatalytic activity than the N-doped one, but with larger band-gap energy. Further nitridation of phosphated titania resulted in narrower band-gap of the N,P-codoped titania than either N- or P-doped one, exhibiting the further enhanced photocatalytic activity.

• 出版日期2009-10-19
• 单位河北工业大学; 南开大学