Research Article

TiO2/Halloysite Composites Codoped with Carbon and Nitrogen from Melamine and Their Enhanced Solar-Light-Driven Photocatalytic Performance

Figure 1

XRD patterns of pure HNTs, TiO2/HNTs, and C+N-HNTs/TiO2 at various ratios ((MA) : (TiO2)). (a) Pure HNTs, (b) TiO2/HNTs, (c) calcined TiO2/HNTs, (d) C+N-HNTs/TiO2 (4.5 : 1), (e) C+N-HNTs/TiO2 (2.2 : 1), and (f) C+N-HNTs/TiO2 (3.3 : 1).