Abstract Silver (Ag) particle is a promising photocatalyst material with relatively high catalytic activity and good absorption in the visible light region. A dendritic structure of Ag has been studied in the purpose to enhance photocatalytic activity due to a large surface area and active site number of the metallic Ag particles. In this work, the Ag dendritic structure was synthesized from a surfactant-free electrolyte using the square wave voltammetry technique. The time-dependent growth of the Ag dendrites and their photocatalytic activity on methylene blue (MB) photodegradation are reported. Morphological analysis exhibits the fractal dendritic structure of Ag was found to continuously grow by increasing the deposition time. The Ag dendrites showed a low charge transfer resistance (366.21 Ω) and high specific capacitance (2.09 F/g). A high rate of MB degradation (45.57%) under ultraviolet irradiation indicated that the Ag dendrites produced using this technique are effective for the photocatalytic degradation of MB dye.

中文翻译：

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使用方波伏安法制备的树枝状银的时间依赖性生长用于亚甲基蓝光降解

摘要 银(Ag)颗粒是一种很有前途的光催化剂材料，具有较高的催化活性，在可见光区具有良好的吸收性。由于金属Ag颗粒的大表面积和活性位点数，为了提高光催化活性，已经研究了Ag的树枝状结构。在这项工作中，使用方波伏安法技术从不含表面活性剂的电解质中合成了 Ag 树枝状结构。报道了银枝晶的时间依赖性生长及其对亚甲基蓝 (MB) 光降解的光催化活性。形态分析表明银的分形树枝状结构被发现通过增加沉积时间而不断增长。Ag 枝晶表现出低电荷转移电阻 (366.21 Ω) 和高比电容 (2. 09 F/g)。在紫外线照射下，MB 的高降解率（45.57%）表明使用该技术生产的 Ag 枝晶对 MB 染料的光催化降解是有效的。