Abstract

Photocatalytic materials have been the focus of several studies due to their excellent optical photoexcitation properties for waste treatment. However, their use promotes the generation of inorganic secondary waste, due to their nanometric grain size, which can cause several environmental hazards. The optimization and immobilization of such photocatalysts for treatment after the catalytic process have thus attracted much attention. In this work, Ag/AgCl nanoparticles were immobilized by hydrothermal treatment on soybean knitted fabric. The photocatalytic activity of the resulting Ag/AgCl-functionalized soybean knitted fabric was estimated based on the reduction of the concentration of Acid Blue 260 dye. The response surface factorial design methodology was applied, varying the Ag/AgCl concentration, nanocatalyst immobilization time, and hydrothermal process temperature, to analyze the individual effect of and interaction between the variables, besides establishing a mathematical model of the process. The photocatalytic results showed that addition of Ag/AgCl to the fabric favored its use and reuse for the degradation of the Acid Blue 260 dye. The mathematical model together with the response surfaces showed that the residence time in the hydrothermal bath was the most significant variable in terms of the dye reduction, favoring this advanced treatment method.

中文翻译：

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因子设计研究Ag / AgCl修饰大豆蛋白针织物对酸性蓝260染料的光催化性能

抽象的

由于光催化材料在废物处理方面具有出色的光激发特性，因此一直是许多研究的重点。然而，由于它们的纳米粒度，它们的使用促进了无机二次废物的产生，这可能引起多种环境危害。因此，在催化过程之后用于处理的这种光催化剂的优化和固定化引起了很多关注。在这项工作中，通过水热处理将Ag / AgCl纳米颗粒固定在大豆针织物上。基于酸性蓝260染料的浓度降低来估计所得的Ag / AgCl官能化的大豆针织物的光催化活性。应用了响应表面因子设计方法，改变了Ag / AgCl的浓度，纳米催化剂的固定时间，和水热过程温度，除了建立过程的数学模型外，还分析变量的个体影响和变量之间的相互作用。光催化结果表明，向织物中添加Ag / AgCl有利于其在酸性蓝260染料的降解中的使用和再利用。数学模型和响应表面一起表明，就染料还原而言，在水浴中的停留时间是最重要的变量，有利于这种先进的处理方法。