Conversion of CO2 into renewable fuel over Pt–g-C3N4/KNbO3 composite photocatalyst. Issue 113 (2nd November 2015)

• Record Type: Journal Article
• Authors: Shi, Haifeng; Zhang, Chengliang; Zhou, Changping; Chen, Guoqing
• Is Part Of: RSC advances. Volume 5:Issue 113(2015)
• Page Start: 93615
• Page End: 93622
• Publication Date: 2015-11-02
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c5ra16870h
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : g-C3 N4 /KNbO3 composite photocatalyst was prepared and developed for reduction of CO2 into CH4 . Abstract : g-C3 N4 /KNbO3 composites were fabricated by ultrasonic dispersion followed by heat treatment method, and developed as visible-light-sensitive photocatalysts for CO2 conversion. The photocatalysts were characterized by X-ray powder diffraction, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, photoluminescence spectra, nitrogen adsorption–desorption, and UV-vis diffuse reflection spectroscopy. HRTEM revealed that an intimate interface between g-C3 N4 and KNbO3 was formed in the g-C3 N4 /KNbO3 composite. The g-C3 N4 /KNbO3 composite exhibited superior photocatalytic performance for CO2 reduction compared to g-C3 N4 under visible-light illumination. Such a significant enhancement in the photocatalytic activity was mainly ascribed to the improved separation efficiency of photoinduced carriers at the interface of the g-C3 N4 /KNbO3 composite, which was beneficial for separating the photoinduced electron–holes and thus improving the photocatalytic performance. The present study would provide a useful method to develop an effective composite photocatalyst for CO2 reduction under visible light irradiation.