Polydopamine nanotubes-templated synthesis of TiO2 and its photocatalytic performance under visible light. Issue 38 (28th April 2017)

• Record Type: Journal Article
• Authors: Wang, Zehuan; Li, Jia; Tang, Feng; Lin, Jun; Jin, Zhaoxia
• Is Part Of: RSC advances. Volume 7:Issue 38(2017)
• Page Start: 23535
• Page End: 23542
• Publication Date: 2017-04-28
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c7ra03063k
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : As templates for generation of TiO2 photocatalysts, polydopamine nanotubes can provide codopants (carbon and nitrogen) and graphene-like carbon coverings simultaneously. Abstract : Herein, we demonstrated that an efficient TiO2 visible-light photocatalyst can be fabricated by templating mesoporous polydopamine (PDA) nanotubes. Because PDA is a nitrogen-doped carbon source, PDA nanotubes as templates elicited distinct advantages for obtained mesoporous TiO2 . First, they introduced a codopant of carbon and nitrogen into anatase TiO2 that narrowed its band gap. Second, they could be graphitized in an optimized calcination process to form graphene-like carbon layers on TiO2 surfaces with high conductivity, which assisted the separation of photogenerated electron–holes of TiO2 . These features endow TiO2 @C-PDA (400-2) excellent photocatalytic performance for the degradation of methyl orange under visible-light irradiation (>420 nm).