两种不同纳米金修饰方法制备的Au/CeO2复合物的抗氧化性能

doi:10.7523/j.issn.2095-6134.2019.01.018

中国科学院大学学报 ›› 2019, Vol. 36 ›› Issue (1): 131-136.DOI: 10.7523/j.issn.2095-6134.2019.01.018

两种不同纳米金修饰方法制备的Au/CeO₂复合物的抗氧化性能

法孟梅, 姚鑫

中国科学院大学化学科学学院, 北京 100049

收稿日期:2017-12-18 修回日期:2018-03-06 发布日期:2019-01-15
通讯作者: 姚鑫,E-mail:yaox@ucas.ac.cn
基金资助:
国家自然科学基金（21271184）、973项目（2014CB931900）和中国科学院科学仪器发展项目（ZDKYYQ20170001）资助

Antioxidant properties of Au/CeO₂ prepared by two different modification methods

FA Mengmei, YAO Xin

School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China

Received:2017-12-18 Revised:2018-03-06 Published:2019-01-15

摘要/Abstract

摘要： 以水热法制备的CeO₂纳米棒为载体，分别采用溶胶法和沉积法对其进行纳米金修饰，得到两种不同纳米金修饰方法制备的Au/CeO₂复合物。在MV-Fenton体系中用紫外分光光度法对两种Au/CeO₂复合物的抗氧化性能进行研究。结果表明：溶胶法制备的Au/CeO₂（S-Au/CeO₂）比沉积法制备的Au/CeO₂（D-Au/CeO₂）展现出更好的抗氧化性能。进一步研究表明：沉积法制备过程可能破坏了CeO₂的表面结构，导致其抗氧化性能降低；另外，溶胶法负载的AuNPs和CeO₂之间的电子传递也使其抗氧化性能增强。

关键词: Au/CeO₂复合物, 溶胶法, 沉积法, 抗氧化性能, 表面结构

Abstract: The application of Au nanoparticles (AuNPs) modified CeO₂(Au/CeO₂) as an antioxidant has great potential in the field of life health, and exploring the antioxidant activities of Au/CeO₂ prepared by different methods is helpful for optimizing the property of Au/CeO₂. In this work, two different Au-modified CeO₂ were synthesized by modifying AuNPs on the surface of CeO₂ nanorods using sol-immobilized and deposition methods, respectively. The antioxidant activities of two different Au/CeO₂ were studied by UV method in the MV-Fenton system, and the results showed that the antioxidant activity of Au/CeO₂ by sol-immobilized method (S-Au/CeO₂) was higher than that of Au/CeO₂ by deposition method (D-Au/CeO₂). The affecting factors on the differences between the antioxidant properties of the two Au/CeO₂ were further investigated. We suppose that the surface structure of CeO₂ may be damaged in the process of preparation by deposited method, which resulted in the lower antioxidant activity of D-Au/CeO₂. In addition, the electron transfer between sol-immobilized AuNPs and CeO₂ contributed to the higher antioxidant activity of S-Au/CeO₂. These results have great significance for the functional preparation and antioxidant property regulation of Au/CeO₂.

Key words: Au/CeO₂, sol-immobilized, deposition method, antioxidant activity, surface structure

中图分类号:

O657.32

法孟梅, 姚鑫. 两种不同纳米金修饰方法制备的Au/CeO₂复合物的抗氧化性能[J]. 中国科学院大学学报, 2019, 36(1): 131-136.

FA Mengmei, YAO Xin. Antioxidant properties of Au/CeO₂ prepared by two different modification methods[J]. , 2019, 36(1): 131-136.

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两种不同纳米金修饰方法制备的Au/CeO₂复合物的抗氧化性能

Antioxidant properties of Au/CeO₂ prepared by two different modification methods

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