Abstract

The thiosulfate system for silver extraction has numerous characteristics such as high efficiency, low consumption, and environmental protection, and it has good application prospects. However, the high cost of metal recovery in thiosulfate systems limits its industrial application. A previous study indicated that Ag₂S/Ag nanocomposite clouds were precipitated from silver thiosulfate complex (AgTS) through ultraviolet photolysis, whereas the semiconductor-metal nanopowders synthesized through the hydrothermal synthesis process are usually important composites that can be used in photocatalysis, broad-spectrum antibacterial, and other environmental fields. Therefore, this study aims to develop high-value utilization of AgTS hydrometallurgical systems based on the photocatalytic properties of nanocomposites, and proposes research on the visible-light photocatalytic activity of Ag₂S/Ag photocatalytic systems precipitated from AgTS through ultraviolet photolysis. First, the morphology and optical properties of the Ag₂S/Ag nanocomposite were investigated. Next, the visible light photocatalytic activity of the Ag₂S/Ag nanocomposite was evaluated, and finally, the new high-value utilization research method of “ultraviolet absorption → ultraviolet photolysis → photocatalysis” was proposed. In this study, we demonstrate a novel method of high-value utilization of silver thiosulfate lixivium with a high photocatalytic efficiency of the Ag₂S/Ag nanocomposite of up to 47.98% after three cycles.

中文翻译：

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紫外光解法从硫代硫酸银配合物中沉淀出的Ag2S/Ag纳米复合材料的可见光光催化活性

摘要

用于提银的硫代硫酸盐体系具有高效、低耗、环保等诸多特点，具有良好的应用前景。然而，硫代硫酸盐体系中金属回收的高成本限制了其工业应用。先前的一项研究表明，Ag ₂S/Ag纳米复合云是由硫代硫酸银复合物（AgTS）通过紫外光解沉淀而成，而通过水热合成工艺合成的半导体-金属纳米粉体通常是重要的复合材料，可用于光催化、广谱抗菌等环境领域. 因此，本研究旨在基于纳米复合材料的光催化性能开发AgTS湿法冶金体系的高价值利用，并提出对AgTS通过紫外光解沉淀的Ag _{2 S/Ag光催化体系的可见光光催化活性进行研究。一、Ag 2}的形貌和光学性质研究了 S/Ag 纳米复合材料。_{接着，对Ag 2} S/Ag纳米复合材料的可见光光催化活性进行了评价，最后提出了“紫外吸收→紫外光解→光催化”的新型高价值利用研究方法。在这项研究中，我们展示了一种高价值利用硫代硫酸银浸洗液的新方法，在三个循环后，Ag ₂ S/Ag 纳米复合材料的光催化效率高达 47.98%。