新型复合光催化剂对植物真菌杀灭效应
毕业论文关键词：沉积-沉淀法；BiOI/CNTs；灰霉菌；杀菌性能
New composite Photocatalyst on Plant Fungal Killing Effect
Abstract:The BiOI/CNTs composite photocatalysts nd the BiOI photocatalysts were prepared by means of precipitation – deposition method. The morphology, structure of the photocatalysts were charactered using a number of analytical instumentations including X-ray powder diffraction (XRD) and scanning electron microscopy (SEM). The bactericidal activity of the two photocatalysts against Botrytis cinerea were investigated under the visible light irradiation. And the relations between the bactericidal activity of the two photocatalysts and the time of lamination were discussed. The results showed the as-prepared BiOI/CNTs performed high photoinactivation of bacteria. The bactericidal activity of BiOI/CNTs and BiOI photocatalysts were increased with the time of irradiation in the photocatalytic reaction, and the Conductivity of Bacterial suspension was increased. The level of total bacterial protein was decereased. The bactericidal activity of the CNTs-dopediOI is better than BiOI.
Key Words:Precipitation–deposition Method；BiOI/CNTs；Botrytis Cinerea；Antibacterial
目 录
摘 要 1
引言 2
1 实验材料与方法 3
1.1 主要实验原料 3
1.2 主要实验器材 3
1.3 光催化剂的制备与表征 3
1.3.1 BiOI的制备和CNTs的处理 3
1.3.2 BiOI/CNTs复合光催化剂的制备 4
1.3.3 光催化剂的表征方法 4
1.4 光催化剂杀菌性能实验方法 4
1.4.1 PDA培养基的制备和灭菌 4
1.4.2 初始菌悬液的制备及浓度的测定 5
1.5 光催化剂杀菌性能测试 5
2 结果与分析 6
2.1 光催化剂的结构表征 6
2.1.1 XRD分析 6
2.1.2 电镜分析 7
2.2 灰霉菌形态分析 8
2.3 光催化剂杀菌性能分析 8
2.3.1 不同浓度光催化剂的杀菌率变化 8
2.3.2 不同光照时间光催化剂的杀菌效果 9
3 结论与展望 11
参考文献 13
致谢 15
新型复合光催化剂对植物真菌的杀灭效应
引言
灰霉菌是灰葡萄孢Botrytis cinerea的简称，它能够侵染近200多种植物[1]。灰霉菌具有广泛的宿主范围，它主要是通过感染植物来引起植物的细胞死亡，然后利用死细胞作为营养的来源进一步生长繁殖，进而危害更大面积的农作物，所以它能够造成农业的减产。近年来由于温室和大棚技术广泛推广，植物灰霉病的危害越来越严重，成为对蔬菜水果等农作物生产的重要限制因素。但是，目前针对灰霉菌尚未找到完全有效并环境友好的治理方法。现有的化学药剂大多有药物残留、环境污染等不利因素，因此，研究出低能耗、高效率、二次污染小和性能稳定的新型抗菌材料就具有非常重要的社会意义。
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