纳米TiO2半导体溶胶的光生物学效应

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通过溶胶-凝胶法制备了纳米TiO2半导体溶胶材料(nano-TiO2 semiconductor sol,NTSS),并测定了抗菌性能;以黄瓜为研究对象,初步探讨了NTSS在防治植物细菌性/真菌性病害及增加叶片光合色素含量方面的光生物学效应.试验结果表明,溶胶材料中TiO2颗粒的结晶型为锐钛矿型,平均粒径为30.6nm;TiO2溶胶材料可在叶片等固体表面形成连续、稳定的抗菌薄膜,具有很强的光氧化活性,抗菌率达到99.9%;通过人工接种病原菌试验及田间病害调查试验发现,黄瓜喷施一定浓度的NTSS后,可显著降
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