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首页> 外文期刊>The journal of physical chemistry, C. Nanomaterials and interfaces >Porous AgCl/Ag Nanocomposites with Enhanced Visible Light Photocatalytic Properties
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Porous AgCl/Ag Nanocomposites with Enhanced Visible Light Photocatalytic Properties

机译：具有增强的可见光光催化性能的多孔AgCl / Ag纳米复合材料

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摘要

Porous AgCl/Ag nanocomposites were fabricated with a facile two-step route, which involves the formation of nanoporous silver (NPS) by dealloying AgAl alloys, and a subsequent surface chlorination in a mixed solution containing H2O2 and HCl. Scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray powder diffraction (XRD), and UV-vis spectroscopy were used to characterize the resulting samples, which revealed a porous AgCl/Ag composite nanostructure that inherited the bicontinuous spongy morphology of NPS precursors with interconnected pore channels and solid ligaments. The existence of Ag in the structure was found to contribute greatly to enhanced absorption in the visible light region. In a test system for the degradation of methylic orange (MO) dye, it was found that porous AgCl/Ag nanocomposites performed very well as efficient and stable visible light catalysts. Under nonoptimized conditions, the MO dye degradation rate can reach as high as 0.75 mg/min·g_(cat) with 420 nm irradiation.
机译：多孔的AgCl / Ag纳米复合材料是通过两步法制造的，该方法涉及通过脱合金AgAl合金形成纳米孔银（NPS），然后在包含H2O2和HCl的混合溶液中进行表面氯化。扫描电子显微镜（SEM），透射电子显微镜（TEM），X射线粉末衍射（XRD）和紫外可见光谱用于表征所得样品，这些样品揭示了继承了双连续海绵状的多孔AgCl / Ag复合纳米结构。具有相互连接的孔道和固体韧带的NPS前体的形态发现该结构中Ag的存在对促进可见光区域中的吸收有很大贡献。在用于降解甲基橙（MO）染料的测试系统中，发现多孔的AgCl / Ag纳米复合材料作为高效稳定的可见光催化剂表现非常出色。在未优化的条件下，用420 nm辐照，MO染料的降解速率可高达0.75 mg / min·g_（cat）。

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