Preparation and photocatalytic performance of porous heterojunction g-C3N4/TiO2 photocatalyst
Environmental pollution is an important problem that needs to be solved in the process of industrial production.We synthesized g-C3N4/TiO2 heterojunction photocatalyst by biological template method,which showed better photocatalytic performance than pure TiO2 water solution in the process of degrading MO wastewater.The Yeast as soft biological template provided the materials with a porous structure and a large specific surface area,which increased the reactive sites in the aqueous solution and respectively,the g-C3N4/TiO2 heterojunction structure acted as an electron transfer channel.light conditions,by the influence of internal electric field and Coulomb force,relatively useless electron-hole pairs got recombination and supreme redox a-bility electron-hole pairs are retained,respectively the retained electron-hole pairs provied the materials with the strongest redox capacity.XPS analysis verified that the direction of electron transfer was from g-C3N4 to TiO2 The radical trapping experiment revealed that·OH and O2-molecules appeared around the composites,which were the main active ingredient in the photocatalytic degradation process.Therefore,the g-C3N4/TiO2 compos-ites prepared by the biotemplate and calcination method are promising photocatalysts for degrading organic dye wastewater.
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