Dual modification of TiO2 nanorod arrays with SiW11Co and Ag nanoparticles for enhanced photocatalytic activity under simulated sunlight. Issue 11 (28th October 2019)

• Record Type: Journal Article
• Authors: Yan, Dandan; Fang, Wencheng; Li, Fengyan; Jin, Zhanbin; Xu, Lin
• Is Part Of: Photochemical & photobiological sciences. Volume 18:Issue 11(2019)
• Page Start: 2804
• Page End: 2813
• Publication Date: 2019-10-28
• Subjects: Photochemistry -- Periodicals; Photobiology -- Periodicals; 541.35
• DOI: 10.1039/c9pp00327d
• Languages: English
• ISSNs: 1474-905X

Abstract

Abstract : SiW11 Co and Ag nanoparticle co-modified TiO2 nanorods were successfully synthesized. The resulting TNRs/SiW11 Co/Ag composite exhibited excellent photocatalytic activity and stability for the degradation of NO2 due to synergistic promotion effects. Abstract : Well-organized TiO2 nanorod arrays (TNRs) have increasingly attracted our attention in recent years due to their excellent photocatalytic properties. However, it is of great importance to prepare more efficient photocatalysts using a facile method towards their more widespread use. In this work, K6 SiW11 O39 Co(ii )(H2 O) (SiW11 Co) and Ag nanoparticles were introduced into TNRs using spin-coating and chemical bath deposition methods. It was found that TNRs/SiW11 Co/Ag composite films with an active area of only 1 cm 2 exhibit highly efficient and sustainable properties for the photodegradation of NO2 and display a significant enhancement compared with P25 and pure TNRs. Photocatalytic measurements demonstrated that both SiW11 Co and Ag synergistically improve the light absorption and charge separation efficiency, thus obtaining the most efficient photocatalytic performance. In addition, the probable photocatalytic mechanism and the dominating active species for NO2 photodegradation were also proposed, in order to testify the effectively enhanced photocatalytic ability of the TNRs/SiW11 Co/Ag composite. Hence, the design of these polyoxometalate and metal particle co-modified TNRs may provide a new tactic for developing promising materials for photocatalytic degradation.