纳米木质素诱导制备金盏花状纳米ZnO 及光催化性能

摘要

Calendula-like nano-ZnO was prepared by hydrothermal method using nano-lignin as morphology-indu-cing and coordinate agent with zinc nitrate and ammonia as raw materials.The crystalline characteristic and mi-crostructure of samples were characterized by X-ray diffraction (XRD ) and scanning electron microscopy (SEM),the photocatalytic performance of samples were also investigated.The results showed that nano-lignin could induce nano-ZnO in its surface deposition and growth,forming calendula-like nano-ZnO which grain size was 42.3 nm,the ultraviolet degradation efficiency of which for malachite green was 91.3% within 2.5 h at room temperature.%以纳米木质素为形貌诱导剂，以硝酸锌和氨水为原料，采用水热合成法制备金盏花状的纳米ZnO.通过X射线衍射(XRD)和扫描电子显微镜(SEM)对样品的结晶特性及形貌进行了表征分析，并对其光催化性能进行了测定.研究结果表明，纳米木质素能诱导纳米ZnO 在其表面沉积和生长，形成晶粒大小为42．3 nm的金盏花状结构，该金盏花状纳米 ZnO 室温下2．5 h内对孔雀石绿的紫外光降解效率为91．3％.