以成本低廉的无机钛盐硫酸氧钛为钛源,首先利用低温水热同步晶化技术制备了具有可见光活性的氮掺杂纳米二氧化钛(N-TiO2)溶胶,然后采用喷涂工艺在瓷绝缘子釉面上喷涂了SiO2溶胶和N-TiO2溶胶制备了具有自清洁功能的N-TiO2/SiO2复合薄膜.所制备的自清洁绝缘子样片在可见光的照射下,8h对甲基橙的降解率达到90％.TiO2/SiO2薄膜与水的接触角光照30min后从28.2°降至7.4°,该超亲水性能可维持2～3天.上述结果表明复合薄膜具有良好的光催化和自清洁性能,有利于有效减少污闪事故的发生.
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