以火山岩为载体,通过溶胶凝胶法经高温煅烧制备了火山岩负载ZnO复合光催化剂,并对使用寿命进行了考察。结果表明,经过6h光催化降解,500℃制备的火山岩负载ZnO样品对亚甲基蓝的脱色率为99.4%。重复使用5次后回收率为98.1%,所回收的火山岩负载ZnO对亚甲基蓝的脱色率为92.4%,同时ZnO的回收率为61.2%,对亚甲基蓝的脱色率为48.5%。 Volcanic rocks were used as supports, and the volcanic-loaded ZnO composite photocatalysts were prepared by sol-gel method calcination at high temperature. The service life was also investigated. The results showed that after 6 h photocatalytic degradation, the decolorization rate of methylene blue by volcanic ZnO samples prepared at 500 ℃ was 99.4%. After 5 times of repeated use, the recovery rate was 98.1%. The recovery rate of volcanic load ZnO to methylene blue was 92.4%, the recovery rate of ZnO was 61.2%, and the decolorization rate of methylene blue was 48.5%.