固相反应合成ZnO/g-C3N4光催化剂及光催化性能

以乙酸锌、氢氧化钠和g-C₃N₄粉末为原料,并添加十二烷基苯磺酸钠粉末作为表面活性剂,采用室温固相研磨法制备了ZnO/g-C₃N₄光催化剂。并研究了复合材料的光催化性能。研究结果表明,经固相研磨后,会形成ZnO/g-C₃N₄复合材料,g-C₃N₄充分细化成薄片状。添加十二烷基苯磺酸钠粉末促进了g-C₃N₄发生相变。当g-C₃N₄含量较低时,产物的形貌呈现为纳米花,实际上是因为大量的氧化锌纳米片负载到g-C₃N₄片上。当g-C₃N₄含量较高时,产物为二维纳米片,由氧化锌纳米颗粒负载到g-C₃N₄片上。合成的ZnO/g-C₃N₄复合材料对亚甲基蓝表现出良好的可见光催化活性。

Study on synthesis of ZnO/g-C3N4 photocatalysts using solid phase reaction method and their photocatalytic property

ZnO/g-C₃N₄ photocatalysts were prepared by solid-state grinding method at room temperature using Zn（CH₃COO）₂,NaOH and g-C₃N₄ powders as raw materials.Sodium dodecylbenzenesulfonate powder was added as a surfactant.The photocatalytic properties of the composites were studied.Results showed that ZnO/g-C₃N₄ composites formed after solid-state grinding and that g-C₃N₄ was refined into thin sheets.The addition of sodium dodecylbenzenesulfonate powder promoted the phase transformation of g-C₃N₄.When the content of g-C₃N₄ was low,the product assumed a nanoflower morphology,which was composed of a large number of ZnO nanosheets loaded on g-C₃N₄ flakes.When the content of g-C₃N₄ was higher,the produc presented many 2D g-C₃N₄ nanosheets loaded by ZnO nanocrystals.The synthesized ZnO/g-C₃N₄ composites exhibited good visible-light photocatalytic activity to methylene blue.