Enhanced photocatalytic activity of TiO2 activated by doping Zr and modifying Pd. Issue 36 (23rd March 2016)

• Record Type: Journal Article
• Authors: Huang, Shaolong; Yu, Yanlong; Yan, Yabin; Yuan, Jixiang; Yin, Shougen; Cao, Yaan
• Is Part Of: RSC advances. Volume 6:Issue 36(2016)
• Page Start: 29950
• Page End: 29957
• Publication Date: 2016-03-23
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c6ra03275c
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : The photocatalytic activity of 4-CP degradation is apparently enhanced by doping Zr and modifying Pd in TiO2 (TiO2 –Zr–Pd) under visible light irradiation. Abstract : A series of TiO2 photocatalysts introduced with Zr and Pd (TiO2 –Zr–Pd x ) are synthesized via a sol–gel method. It is revealed that Zr 4+ ions are doped into TiO2 lattice in the substitutional mode and Pd 2+ ions exist as –O–Pd–O– species on the surface of TiO2 . The energy level of the substitutional doped Zr 4+ ions and –O–Pd–O– surface species are located about 0.15 eV below the conduction band and 0.4 eV above the valence band, respectively. Moreover, the band structure of TiO2 –Zr–Pd x can be further adjusted by changing the amount of Pd 2+ ions. Owing to the synergistic effect of Pd and Zr, the response is extended into the visible region and the photogenerated charge carriers are separated effectively. Therefore, TiO2 –Zr–Pd x samples exhibit improved photocatalytic activity, compared with TiO2 –Zr and TiO2 –Pd under both UV and Vis irradiation.