含有混合价态Cu的Cu-Si纳米复合物:提高铜剂的抗微生物活性的新策略

Copper-Silica Nanocomposite with Mixed-Valence Cu:Potential Novel Cu Biocides with High Efficacy

铜化合物广泛用作植物保护用杀菌剂。然而,长期的使用导致农业土壤中铜含量升高。含有混合价态铜的Cu-Si复合物含有多种氧化状态的铜,而富含一价铜和铜,可替代传统杀生剂,比CuSiNG和其他二价铜物质对苜蓿黄单胞枳柚亚种、大肠杆菌和E.coli copA1::kan活性更高,对植物安全,可用作农业用杀菌剂。

Copper compounds are widely used as fungicides for crop protection.Prolonged use of Cu biocides would lead to undesirable Cu levels in agricultural soil.Composite mixed-valence copper-loaded silica nanogel as an alternative to conventional biocides contains Cu in different oxidation states,enriched with Cu（0） and Cu（Ⅰ）,and showed improved efficacy against Xanthomonas alfalfae and Escherichia coli,safe for plants.It is potential useful as agricultural biocides.