PDF(Pubmed)
Abstract：
Advanced Oxidation Processes (AOPs) offer promising methods for disinfection by generating radical species like hydroxyl radicals, superoxide anion radicals, and hydroxy peroxyl, which can induce oxidative stress and deactivate bacterial cells. Photocatalysis, a subset of AOPs, activates a semiconductor using specific electromagnetic wavelengths. A novel material, Cu/Cu2O/CuO nanoparticles (NPs), was synthesized via a laser ablation protocol (using a 1064 nm wavelength laser with water as a solvent, with energy ranges of 25, 50, and 80 mJ for 10 min). The target was sintered from 100 °C to 800 °C at rates of 1.6, 1.1, and 1 °C/min. The composite phases of Cu, CuO, and Cu2O showed enhanced photocatalytic activity under visible-light excitation at 368 nm. The size of Cu/Cu2O/CuO NPs facilitates penetration into microorganisms, thereby improving the disinfection effect. This study contributes to synthesizing mixed copper oxides and exploring their activation as photocatalysts for cleaner surfaces. The electronic and electrochemical properties have potential applications in other fields, such as capacitor materials. The laser ablation method allowed for modification of the band gap absorption and enhancement of the catalytic properties in Cu/Cu2O/CuO NPs compared to precursors. The disinfection of E. coli with Cu/Cu2O/CuO systems serves as a case study demonstrating the methodology\'s versatility for various applications, including disinfection against different microorganisms, both Gram-positive and Gram-negative.
摘要：
高级氧化工艺（AOPs）通过产生自由基物种，如羟基自由基，提供了有前途的消毒方法。超氧阴离子自由基，和羟基过氧，可以诱导氧化应激并使细菌细胞失活。光催化,AOP的一个子集，使用特定的电磁波长激活半导体。一种新颖的材料，Cu/Cu2O/CuO纳米粒子(NPs),是通过激光烧蚀协议合成的(使用1064nm波长的激光，以水为溶剂，能量范围为25、50和80mJ，持续10分钟)。以1.6、1.1和1°C/min的速率将靶从100°C烧结至800°C。Cu的复合相,CuO,Cu2O在368nm的可见光激发下显示出增强的光催化活性。Cu/Cu2O/CuONPs的大小有利于渗透到微生物中，从而提高消毒效果。这项研究有助于合成混合氧化铜，并探索它们作为清洁表面光催化剂的活化作用。电子和电化学性能在其他领域具有潜在的应用,如电容器材料。与前体相比，激光烧蚀方法可以改善Cu/Cu2O/CuONP的带隙吸收并增强催化性能。用Cu/Cu2O/CuO系统消毒大肠杆菌作为一个案例研究，证明了该方法在各种应用中的多功能性。包括对不同微生物的消毒，革兰氏阳性和革兰氏阴性。
