Dissolved organic matter-mediated reduction of ionic Au(III) to elemental Au nanoparticles and their growth to visible granules

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 环境化学与生态毒理学国家重点实验室

	Dissolved organic matter-mediated reduction of ionic Au(III) to elemental Au nanoparticles and their growth to visible granules
	Chen, Ying; Guo, Yingying; Liu, Guangliang; Song, Maoyong; Cai, Yong; Yin, Yongguang
刊名	CHINESE CHEMICAL LETTERS
	2020-07
卷号	31 期号:7 页码:1970-1973
关键词	Gold granule Gold nanoparticle Dissolved organic matter Photochemical reduction Mineralization
ISSN号	1001-8417
英文摘要	The biogeochemical transformation of gold (Au), i.e. its dissolution and re-precipitation, is critical in supergene transport of Au and formation of Au granules. Besides biogenic reduction, the formation Au granules can also be driven by chemical processes. Previous studies have showed the formation of Au nanoparticles (AuNPs) from ionic Au(III) can be mediated by dissolved organic matter under sunlight. In this letter, we further demonstrated that these AuNPs can further slowly (in years) grow into visible Au granules. Different sized nano-flower and fractal dendrite-like branched gold structures (from tens of nanometres to over 100 mu m) were observed in the Au granule sample. This growth of AuNPs into visible Au granules may play a critical role in the supergene mineralization and enrichment of secondary Au and drive the biogeochemical cycle of Au. (C) 2019 Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences. Published by Elsevier B.V. All rights reserved.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/44659]
专题	生态环境研究中心_环境化学与生态毒理学国家重点实验室
推荐引用方式 GB/T 7714	Chen, Ying,Guo, Yingying,Liu, Guangliang,et al. Dissolved organic matter-mediated reduction of ionic Au(III) to elemental Au nanoparticles and their growth to visible granules[J]. CHINESE CHEMICAL LETTERS,2020,31(7):1970-1973.
APA	Chen, Ying,Guo, Yingying,Liu, Guangliang,Song, Maoyong,Cai, Yong,&Yin, Yongguang.(2020).Dissolved organic matter-mediated reduction of ionic Au(III) to elemental Au nanoparticles and their growth to visible granules.CHINESE CHEMICAL LETTERS,31(7),1970-1973.
MLA	Chen, Ying,et al."Dissolved organic matter-mediated reduction of ionic Au(III) to elemental Au nanoparticles and their growth to visible granules".CHINESE CHEMICAL LETTERS 31.7(2020):1970-1973.