Department of Nanoscience and Technology, Bharathiar University, Coimbatore, 641 046, India.
Nanobiotechnology Laboratory, PSG Institute of Advanced Studies, Peelamedu, Coimbatore, 641 004, India.
Chemosphere. 2021 Jul;275:130061. doi: 10.1016/j.chemosphere.2021.130061. Epub 2021 Feb 23.
Designing a cost-effective, high potential and recyclable catalyst remains a challenge. In the present work, a monolithic PAM-GO-Ag hydrogel is prepared by a facile, eco-friendly method using gamma-ray irradiation. The formation of GO-Ag composite by gamma radiation is also investigated and it is authenticated by XRD, FTIR, Raman, XPS and TEM analysis. The PAM-GO-Ag hydrogel exhibits excellent catalytic activity to different catalysant like methylene blue, Rhodamine-B, and pharmaceutical compound ciprofloxacin. The high catalyst carrying capacity and rapid electron shuttling ability of GO plays a significant role in the high performance of PAM-GO-Ag hydrogel. The PAM-GO-Ag hydrogel also exhibits excellent antibacterial activity. The damaged cell membrane, protein leakage, and increased ROS level contribute to the antibacterial activity of PAM-GO-Ag. The monolithic structure of PAM-GO-Ag hydrogel makes it easy to handle, recover, and reuse for several runs without significant loss of catalytic and antibacterial activity. All these results showed the possible application of PAM-GO-Ag hydrogel as a promising catalyst for the reduction of different pollutants and antibacterial agents on a large scale with good reusability.
设计一种具有成本效益、高潜力和可回收性的催化剂仍然是一个挑战。在本工作中，通过一种简便、环保的γ射线辐照方法制备了一种整体式 PAM-GO-Ag 水凝胶。还研究了γ辐射形成 GO-Ag 复合材料，并通过 XRD、FTIR、Raman、XPS 和 TEM 分析进行了验证。PAM-GO-Ag 水凝胶对不同催化剂如亚甲基蓝、罗丹明 B 和药物化合物环丙沙星表现出优异的催化活性。GO 具有高的催化剂承载能力和快速的电子穿梭能力，对 PAM-GO-Ag 水凝胶的高性能起着重要作用。PAM-GO-Ag 水凝胶还表现出优异的抗菌活性。细胞膜损伤、蛋白质泄漏和 ROS 水平增加导致 PAM-GO-Ag 的抗菌活性。PAM-GO-Ag 水凝胶的整体结构使其易于处理、回收和重复使用数次，而不会显著损失催化和抗菌活性。所有这些结果表明，PAM-GO-Ag 水凝胶作为一种有前途的催化剂，可用于大规模还原不同污染物和抗菌剂，具有良好的可重复使用性。
