%0 Journal Article
%J Applied Catalysis B: Environmental
%D 2020
%T 2D/1D graphitic carbon nitride/titanate nanotubes heterostructure for efficient photocatalysis of sulfamethazine under solar light: Catalytic “hot spots” at the rutile–anatase–titanate interfaces
%A Ji, Haodong
%A Du, Penghui
%A Zhao, Dongye
%A Si Li
%A Fengbin Sun
%A Evert C. Duin
%A Liu, Wen
%K g-CN
%K Heterostructure
%K Pharmaceuticals and personal care products
%K Photocatalysis
%K Titanate
%X 2D/1D graphitic carbon nitride hybridized with titanate nanotubes (g-C3N4/TNTs) was prepared through a hydrothermal reaction–calcination method. The photocatalyst exhibited high degradation efficiency for sulfamethazine (SMT) through photocatalysis under simulated solar light. The optimized material was composed of anatase, rutile, titanate and g-C3N4 crystalline phases. In situ transformation of titanate to anatase and rutile with specific content proportion (∼80:20, P25-type composition) leaded to formation of nanoscale “hot spots” at rutile–anatase–titanate interfaces, and then subsequent charge transfer occurred. Large specific surface area of TNTs as skeleton resulted in high-efficient interface reaction, while heterojunction with g-C3N4 further extended the adsorption to visible light region and retarded electron-hole pairs recombination. Density functional theory (DFT) calculation indicated the SMT sites with high Fukui nucleophilic (f-) index prefered to be attacked by radacils. Reduced toxicity of SMT degradation intermediates, good reusability and stability of g-C3N4/TNTs all suggested the great application potential in practical water treatment area.
%B Applied Catalysis B: Environmental
%V 263
%P 118357
%G eng
%U http://www.sciencedirect.com/science/article/pii/S0926337319311038
%R http://doi.org/10.1016/j.apcatb.2019.118357