阅读说明：本技术 一种高效可见光合成氨的氮化碳-二氧化钛异质结材料的制备方法及其应用 (Preparation method and application of carbon nitride-titanium dioxide heterojunction material for efficiently synthesizing ammonia by visible light ) 是由 张金龙 吴仕群 王灵芝 岳文晖 何承萱 陈子钰 潘礼汉 于 2021-06-16 设计创作，主要内容包括：本发明提供了一种具有可见光合成氨性能复合材料的制备方法,该材料在可见光光催化合成氨体系中可以得到很好的应用。本发明以尿素作为前驱体合成氮化碳(CN)材料,以四氯化钛和钛酸异丙酯作为钛源,通过将氮化碳纳米片浸泡于钛源中,随后进行水解、老化、煅烧等步骤即可得到氮化碳-二氧化钛(CN-TiO-(2))异质结材料。本发明所述方法可以简单通过控制对所加氮化碳的量来控制异质结材料中两种组分的比例,且可以通过在惰性气氛下煅烧增加异质结中氧空位的浓度。制备的富含氧空位的氮化碳-二氧化钛异质结(CN-OvTiO-(2))材料具有较高可见光吸收效率、氮气捕获能力及电荷分离效率,在可见光纯水体系中,表现出优异的光催化合成氨活性及稳定性。(The invention provides a preparation method of a composite material with visible light ammonia synthesis performance, and the composite material can be well applied to a visible light ammonia synthesis system. The invention takes urea as a precursor to synthesize a Carbon Nitride (CN) material, takes titanium tetrachloride and isopropyl titanate as titanium sources, and obtains the carbon nitride-titanium dioxide (CN-TiO) by soaking carbon nitride nanosheets in the titanium sources, and then carrying out the steps of hydrolysis, aging, calcination and the like 2 ) A heterojunction material. The method of the invention can control the proportion of two components in the heterojunction material simply by controlling the amount of the added carbon nitride, and can increase the concentration of oxygen vacancies in the heterojunction by calcining in an inert atmosphere. Prepared carbon nitride-titanium dioxide heterojunction (CN-OvTiO) rich in oxygen vacancy 2 ) The material has high visible light absorption efficiency, nitrogen capture capacity and charge separation efficiencyThe photocatalyst shows excellent photocatalytic synthetic ammonia activity and stability in a visible light pure water system.)