• 关键词：载体  负载  TiO₂/g-C₃N₄  可见光催化  NO污染

• 基金项目：国家重点研发计划项目（No.2016YFC0204702）；国家自然科学基金（No.21501016，51478070，51108487）

• 孙艳娟
• 重庆工商大学催化与环境新材料重庆市重点实验室, 环境与资源学院, 重庆 400067

• 王瑞
• 重庆工商大学催化与环境新材料重庆市重点实验室, 环境与资源学院, 重庆 400067

• 董帆
• 重庆工商大学催化与环境新材料重庆市重点实验室, 环境与资源学院, 重庆 400067

• 何詠基
• 香港教育大学科学与环境研究学系, 香港 999077

• 吴忠标
• 浙江大学环境工程系, 环境污染修复与生态健康教育部重点实验室, 杭州 310027

• 摘要：以市售P25（TiO₂）和g-C₃N₄为原料，以多孔氧化铝泡沫陶瓷为载体，进行了负载型光催化组件的设计与环境应用.运用浸渍提拉-热处理法制备负载P25/g-C₃N₄的泡沫陶瓷组件，对其微结构进行了表征测试，并将其应用于空气中NO的去除.结果表明，P25/g-C₃N₄在氧化铝泡沫陶瓷表面负载牢固，P25/g-C₃N₄禁带结构匹配有利于光生电荷的分离.研究了P25/g-C₃N₄比例对光催化性能的影响，当g-C₃N₄占P25的量为30%时，负载组件的光催化性能最佳，对NO的去除率达到79.6%.在5次循环反应后，负载型光催化剂表现出良好的稳定性.本研究为P25/g-C₃N₄复合光催化剂的空气净化应用提供了思路和技术基础.

• Abstract：The immobilized photocatalytic device was designed and applied in environmental purification using commercially available P25 (TiO₂) as raw materials and porous Al₂O₃ ceramic foam as support. The immobilized P25/g-C₃N₄ ceramic foam device was prepared by a soak-pulling-thermal treatment method. The microstructure of P25/g-C₃N₄ ceramic foam was characterized, and it was applied in removal of NO in air. The results indicated that the P25/g-C₃N₄ was immobilized on the ceramic foam firmly and the band structure matching between P25 and g-C₃N₄ could promote the charge separation. The effects of the P25/g-C₃N₄ mass ratio were investigated. When the content of g-C₃N₄ was controlled at 30%, the photocatalytic device could achieve the optimized performance with a NO removal ratio of 79.6%. After five recycled runs, the photocatalytic device could maintain the high stability. The present work could provide new perspective and technological basis for the air purification application of P25/g-C₃N₄ composites photocatalysts.

• Key words：support  immobilization  TiO₂/g-C₃N₄  visible light photocatalysis  NO pollution

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