光催化法制备GO@Au纳米复合材料及其抗菌性能  

Photocatalytic Preparation and Antibacterial Activity of GO@Au Nanocomposites

作　　者：孙薇 李福森[2] 韩存鑫 邓月 魏文林 李冰 时东方[2] SUN Wei;LI Fusen;HAN Cunxin;DENG Yue;WEI Wenlin;LI Bing*;SHI Dongfang(College of Physics,Changchun Normal University,Changchun 130032,China;Institute of Innovation Science and Technology,Changchun Normal University,Changchun 130032,China)

机构地区：[1]长春师范大学物理学院,长春130032 [2]长春师范大学科技创新研究院,长春130032

出　　处：《高等学校化学学报》2025年第3期90-96,共7页Chemical Journal of Chinese Universities

基　　金：吉林省科技厅自然科学基金(批准号:20210101164JC);吉林省教育厅科学技术研究项目(批准号:JJKH20220824KJ);长春师范大学自然科学基金(批准号:2020-010)资助。

摘　　要：采用光催化法合成了氧化石墨烯(GO)和Au纳米粒子的复合材料.研究发现,金纳米粒子的尺寸可以通过光照时间进行调控,当光照小于20 min时,GO和Au纳米粒子复合材料的吸收光谱没有明显的吸收峰,说明金纳米团簇(GO@Au NCs)生成;随着光照时间增加,在540 nm处出现吸收峰,说明金纳米粒子的尺寸增大,金纳米颗粒(GO@Au NPs)生成.GO的光生电子被用于还原Au^(3+)生成Au纳米粒子,因此GO中的大量氧化官能团得以保留,使得GO@Au NCs和GO@Au NPs均具有极好的亲水性.金纳米粒子的抗菌性能与尺寸密切相关,GO@Au NCs展现出了良好的抗菌性能,对金黄色葡萄球菌的抗菌率高达99%.GO@Au NPs无明显抗菌效果,这是由于GO@Au NCs的高比表面积和高缺欠态有利于活性氧的生成.A composite material composed of graphene oxide(GO)and gold nanoparticles was synthesized via photocatalytic method.The research results indicate that the size of the Au nanoparticles can be controlled by adjusting the illumination time.When the illumination time is less than 20 min,the absorption spectrum of the GO and Au nanohybrids does not exhibit any significant absorption peaks,suggesting the formation of GO loaded Au nanoclusters(GO@Au NCs).As the illumination time increases,an absorption peak appears at 540 nm,indicating an increase in the size of the Au nanoparticles and the formation of GO loaded Au nanoparticles(GO@Au NPs).Furthermore,since the photogenerated electrons from GO are utilized to reduce Au^(3+)to form Au nanoparticles,a large number of oxidative functional groups in GO are preserved,endowing both GO@Au NCs and GO@Au NPs with excellent hydrophilicity.Notably,the antibacterial performance of Au nanoparticles is closely related to their size.GO@Au NCs demonstrated outstanding antibacterial properties,with a bacterial inhibition rate against Staphylococcus aureus as high as 99%.In contrast,GO@Au NPs showed hardly significant antibacterial effect.This is attributed to the high specific surface area and high defect states of GO@Au NCs,which favor the generation of reactive oxygen species(ROS).

关 键 词：氧化石墨烯 金纳米粒子 纳米复合材料 抗菌性能 

分 类 号：O643[理学—物理化学]