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

Secondary Vocational Education Department of Weifang Engineering Vocational College, No. 4139, Linglongshan South Road, Qingzhou, Shandong Province, 262500 Qingzhou, China

^* Corresponding author: liyan082093@163.com

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.