Photocatalytic Degradation of Thiacloprid Using Tri-Doped TiO2 Photocatalysts: A Preliminary Comparative Study

Catalysts

Stefania Pragliola¹  Vincenzo Venditto¹  Wanda Navarra¹  Olga Sacco¹  Antonietta Mancuso²  Vincenzo Vaiano² 

[1] Department of Chemistry and Biology “A. Zambelli” & INSTM Research Unit, University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Italy;Department of Industrial Engineering, University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Italy;

关键词: tri-doped TiO₂;    thiacloprid;    photocatalysis;    water treatment;   

DOI  :  10.3390/catal11080927

来源: DOAJ

【 摘 要 】

Different tri-doped TiO₂ photocatalysts (Fe-N-P/TiO₂, Fe-N-S/TiO₂, Fe-Pr-N/TiO₂, Pr-N-S/TiO₂, and P-N-S/TiO₂) were successfully prepared and tested in the photocatalytic removal of thiacloprid (THI) under UV-A, visible, and direct solar light irradiation. The physical-chemical properties of the prepared catalysts were analyzed by different characterization techniques, revealing that dopants are effectively incorporated into the anatase TiO₂ lattice, resulting in a decrease of the energy band gap. The reduction of photoluminescence intensity indicates a lower combination rate and longer lifespan of photogenerated carriers of all doped samples in comparison with the un-doped TiO₂. The doped photocatalysts not only significantly promote the photodegradation under UV-A light irradiation but also extend the optical response of TiO₂ to visible light region, and consequently improve the visible light degradation of THI. Fe-N-P tri-doped TiO₂ sample exhibits the highest THI photodegradation degree (64% under UV-A light, 29% under visible light and 73% under solar light).

【 授权许可】

Unknown