1.The visible light degradation activity and the photocatalytic mechanism of tetra(4-carboxyphenyl) porphyrin sensitized TiO2

作者：Huigang Wang ^a,b,c, *, Dongmei Zhou ^a , Zhangzhu Wu ^a , Junmin Wan ^a , Xuming Zheng ^a , Lihong Yu ^b , David Lee Phillips ^b

来源：Materials Research Bulletin 57 (2014) 311–319

DOI：10.1016/j.materresbull.2014.06.017

摘要：

Tetra(4-carboxyphenyl) porphyrin(TCPP) were chemically sensitized on TiO₂ to act as visible light antenna and to modify the photo response properties of TiO₂ particles, their properties of photogenerated holes and electrons were studied by transient absorption spectroscopes. The time-correlated single-photon counting (TCSPC) technique revealed that the S2–S0 fluorescence intensity of TCPP is enhanced noticeably by TiO₂, and the lifetime prolonged. Adsorption and photo degradation of methylene blue (MB) over TCPP-TiO₂ were systematically investigated. More over the overall picture of electronic relaxation dynamics for TCPP-TiO₂ is presented, and the detailed short-time dynamics for visible-light induced catalytic mechanism was discussed. The development of the porphyrin-based photocatalyst provides an alternative approach in harnessing solar visible light and show promising prospect for the treatment of dye pollutants from wastewaters in future industrial application.

插图：