Antifungal activity and mechanism of palladium-modified nitrogen-doped titanium oxide photocatalyst on agricultural pathogenic fungi Fusarium graminearum.
Antifungal activity and mechanism of palladium-modified nitrogen-doped titanium oxide photocatalyst on agricultural pathogenic fungi Fusarium graminearum.
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DOI：
10.1021/am4031196
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发表时间：
2013-10
影响因子：
9.5
通讯作者：
Jingtao Zhang;Yang Liu;Qi Li;Xiaoping Zhang;J. Shang
中科院分区：
文献类型：
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作者：
Jingtao Zhang;Yang Liu;Qi Li;Xiaoping Zhang;J. Shang
禾谷镰刀菌（Fusarium graminearum）是小麦赤霉病（Fusarium head blight，FHB）的病原菌，可显著降低小麦品质和产量，并产生多种真菌毒素，对人类食品安全构成潜在威胁。作为常用化学杀菌剂的环境友好替代品，研究了一种高效的光催化杀菌技术。在可见光活化的钯改性的氮掺杂的二氧化钛（TiON/PdO）纳米颗粒光催化剂上展示了在可见光照射下的禾谷镰刀菌大分生孢子。由于TiON/PdO纳米粒子和F.结果表明，纳米粒子在大分生孢子表面有较强的吸附作用，有利于大分生孢子的光催化消毒。TiON/PdO纳米粒子对这些大分生孢子的光催化消毒机制可以归因于它们的细胞壁/膜损伤所造成的攻击从活性氧（ROS）的荧光/相差显微镜观察表明，而其细胞结构的破坏是不必要的，他们的生活力的损失。
Fusarium graminearum is the pathogen for Fusarium head blight (FHB) on wheat, which could significantly reduce grain quality/yield and produce a variety of mycotoxins posing a potential safety concern to human foods. As an environmentally friendly alternative to the commonly used chemical fugicides, a highly effective photocatalytic disinfection of F. graminearum macroconidia under visible light illumination was demonstrated on a visible-light-activated palladium-modified nitrogen-doped titanium oxide (TiON/PdO) nanoparticle photocatalyst. Because of the opposite surface charges of the TiON/PdO nanoparticles and the F. graminearum macroconidium, the nanoparticles were strongly adsorbed onto the macroconidium surface, which is beneficial to the photocatalytic disinfection of these macroconidia. The photocatalytic disinfection mechanism of TiON/PdO nanoparticles on these macroconidia could be attributed to their cell wall/membrane damage caused by the attack from reactive oxygen species (ROSs) as demonstrated by the fluorescence/phase contrast microscopy observations, while a breakage of their cell structure was not necessary for their loss of viability.