Photocatalytic removal of toluene with CdIn2S4/CNFs catalyst: effect of ozone addition

Abstract CdIn 2 S 4 (CIS) has attracted widespread attention due to its structural stability and photoelectric properties, however, it is difficult recycle when after usage. Carbon nanofibers (CNFs) as a suitable electron acceptor stable physicochemical properties enhanced the mechanical easily recycle. There are also few reports on applying CIS/CNFs composite photocatalyst in removing volatile organic compounds (VOCs). In this study, novel was synthesized via simple hydrothermal method. Various characterizations, such X-ray diffraction, Scanning Electron Microscope, Photoelectron Spectroscopy Transmission Microscopy proved successful synthesis of revealed that CNFs grow surfaces CIS connected with three-dimensional (3D) conductive network. Under visible light irradiation, degradation toluene reached optimal level 86% doped 3% CNFs. Furthermore, 95% removal efficiency achieved 200 ppm ozone added into system mineralization rate improved. The 3D network can facilitate effective separation transfer photogenerated electron-hole pairs, protect core from photo-corrosion be recycled. Ultimately, plausible ozone-enhanced photocatalytic mechanisms were proposed. Hence, study presents new visible-light driven photocatalysis process toward VOCs.