Recycling sustainable industrial solid waste, such as silica fume, has recently become an important issue. Due to its large amounts, the exploitation of industrial solid waste is a great urgent issue and optimal solution for environmental and water resources protection. Consequently, this manuscript aims to synthesis a novel, low-cost, and efficient photocatalyst to degrade crystal violet and produce crystal violet-free water. The proposed photocatalyst was prepared by combining ZnO nanosheets with silica fume-derived SiO₂ to get a novel, mesoporous ZnO@silica fume-derived SiO₂ photocatalyst. The influence of pH, time, dose, temperature and initial CV concentration were systematically investigated. The results showed that ZnO@silica fume-derived SiO₂ actively removed >98% of the crystal violet dye from synthetic wastewater of 10 ppm concentration within 1 h, at pH 9.0 with a first-order kinetic model. The reaction mechanism between photocatalysts and crystal violet was also discussed. The prepared photocatalyst displayed high stability after five reuse cycles, leading to a decrease in the overall cost of the wastewater remediation process. The as-synthesized ZnO@silica fume-derived SiO₂ nanocomposite shows promising potential for ecological safety, demonstrating that ZnO@silica fume-derived SiO₂ has a large removal performance.

回收可持续的工业固体废物，例如硅粉，最近已成为一个重要问题。工业固废的开发利用量大，是环境和水资源保护的一个非常紧迫的问题和最佳解决方案。因此，本手稿旨在合成一种新型、低成本、高效的光催化剂来降解结晶紫并生产无结晶紫的水。所提出的光催化剂是通过将 ZnO 纳米片与硅粉衍生的 SiO ₂结合得到一种新型的介孔 ZnO@硅粉衍生的 SiO ₂光催化剂来制备的。系统地研究了 pH、时间、剂量、温度和初始 CV 浓度的影响。结果表明，ZnO@硅粉衍生的SiO ₂用一级动力学模型在 1 小时内从 10 ppm 浓度的合成废水中主动去除 > 98% 的结晶紫染料，pH 值为 9.0。还讨论了光催化剂与结晶紫的反应机理。制备的光催化剂在五次重复使用循环后表现出很高的稳定性，从而降低了废水修复过程的总成本。合成的ZnO@硅粉衍生的SiO ₂纳米复合材料显示出良好的生态安全潜力，表明ZnO@硅粉衍生的SiO ₂具有很大的去除性能。