Preparation of High Value Added Chemicals by Layered G-C3N4 Photocatalytic Oxidation of Glucose

Abstract

This study used cyanamide as the precursor and SiO2 as the template to prepare a layered structure g-C3N4, and characterized its crystal structure, morphology, optical performance, and electrochemical performance. Photocatalytic oxidation experiments were conducted on biomass derivatives (glucose).Orthogonal experiments were used to study the effects of factors such as illumination time, catalyst concentration, and photocurrent on photocatalytic reactions, and the reaction mechanism was explored. The product was qualitatively analyzed by gas chromatography-mass spectrometry (GC-MS) and quantitatively analyzed by High-performance liquid chromatography (HPLC). The results showed that the prepared g-C3N4 exhibited a layered structure with a band gap of 2.78 eV. When the catalyst concentration is 10mg, the photocurrent intensity is 4 A, and the illumination time is 24 hours, the glucose conversion rate is 49.09 %. The active group capture experiment shows that the main active species of g-C3N4 under visible light is ·O -. In this study, commercial P25 catalyst was used for photocatalytic oxidation of glucose under optimal conditions. The experimental results indicate that the catalytic oxidation performance of P25 for glucose is lower than that of layered structure g-C3N4.