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在TiO₂/活性碳复合材料上,从工业化物涂废水中高效地回收银

Naphat Posachayanan¹, Phummephat Liwetpitaya¹, Auttawit Thoumrungroj¹

¹Department of Chemical Engineering, Faculty of Engineering, Mahidol University, Phuttamonthon 4 Road, Nakhon Pathom, 73170, Thailand.

|October 25, 2024

概括

从珠宝废水中提取宝贵的银离子,使用二氧化 (TiO2) 和活性碳 (AC) 光催化剂. 这种方法实现了94%的白银回收,为金属回收和抗菌应用提供了双重解决方案.

科学领域:

环境化学环境化学
材料科学材料科学材料科学
纳米技术纳米技术

背景情况:

来自珠宝涂层的含银的废水代表了重大的经济损失.
从工业废水中回收贵金属的有效方法对于可持续性至关重要.

研究的目的:

使用光催化工艺系统地从基于酸盐的涂层废水中回收银离子.
调查各种半导体光催化剂的有效性,包括TiO2,ZnO,Bi2O3和WO3,增强活性炭 (AC).

主要方法:

使用商业半导体 (TiO2,ZnO,Bi2O3,WO3) 和交流增强半导体进行银离子的光催化回收.
对光催化剂性能的描述,重点是TiO2纳米粒子 (NP) 和TiO2/AC复合材料.
评估银的回收效率,反应时间和光催化剂的可重复使用性.

主要成果:

TiO2纳米颗粒表现出最高的光催化银回收,这是由于优越的纹理特性和活性位点.
在紫外线照射下,TiO2/AC复合物 (TiO2/AC1含有14.9%重量%的AC) 在45分钟内实现了大约94%的白银回收.
活性炭促进了TiO2中的电子迁移,增强了电子孔对的分离和光催化活性.
虽然光催化活性在第四次使用后下降,但复合物在黑暗环境中表现出显著的抗菌特性.

结论:

TiO2 / AC复合物是一种高效的光催化剂,用于从工业废水中回收银.
活性炭在提高基于TiO2的光催化剂的性能方面发挥着至关重要的作用.
回收的银色装饰光催化剂显示出实际应用的潜力,包括抗菌用途.

关键词:

活性炭是一种活性炭.光催化作用的光催化银的废水是银的废水.银的回收银的回收二氧化二氧化的使用情况.废水是废水,废水就是废水.

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