Zingiber montanum (Koenig) Link ex Dietr. (abbreviated as ZM), an herbal extract is an outstanding antioxidant; however, it is unstable to chemicals and light. ZnAl-layered double hydroxide (mZnAl-LDH) and the calcined mZnAl-LDH (at 300, 500 and 700 °C), showing optical and antibacterial properties, and drug delivery vehicle, were utilized to tailor the antioxidant and antibacterial activities of ZM extract. The ZM extract (obtained by ultrasound-assisted maceration) and mZnAl-LDH (prepared by co-precipitation method) or the calcined mZnAl-LDH hosts were mixed by solid–solid method. The obtained products were analyzed by XRD, FT-IR, SEM, zeta potential and UV–VIS. The spectroscopic observation displayed the absorption bands at 200–385 nm due to host material and at 400–600 nm due to ZM extract, indicating the presence of ZM extract in host material. The DPPH-radical scavenging activity of composites was dependent on the type of host material based on the difference in the release profile of ZM extract. The host materials could tailor the optical stability, and antioxidant and antibacterial activities of ZM extract as a result of the host–guest and guest–guest interactions.

Graphical abstract

中文翻译：

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基于 ZnAl-LDH 的主体材料对 Zingiber montanum (Koenig) Link ex Dietr 的光学、抗氧化和抗菌特性的影响。提炼

Zingiber montanum (Koenig) Link ex Dietr。 （简称ZM），一种草本提取物，是一种出色的抗氧化剂；然而，它对化学品和光不稳定。利用表现出光学和抗菌特性的 ZnAl 层状双氢氧化物 (mZnAl-LDH) 和煅烧的 mZnAl-LDH（在 300、500 和 700 °C 下）以及药物递送载体来定制 ZM 提取物的抗氧化和抗菌活性。将ZM提取物（通过超声辅助浸渍获得）和mZnAl-LDH（通过共沉淀法制备）或煅烧的mZnAl-LDH主体通过固-固方法混合。通过 XRD、FT-IR、SEM、zeta 电位和 UV-VIS 对所得产物进行了分析。光谱观察显示，主体材料在 200-385 nm 处有吸收带，ZM 提取物在 400-600 nm 处有吸收带，表明主体材料中存在 ZM 提取物。复合材料的 DPPH 自由基清除活性取决于基于 ZM 提取物释放曲线差异的主体材料类型。由于主客体和客体相互作用，主体材料可以调整 ZM 提取物的光学稳定性、抗氧化和抗菌活性。

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