Facile Hydrothermal Synthesis of Nanocubic Pyrite  Crystals Using Greigite Fe3S4 and Thiourea as  Precursors

	Facile Hydrothermal Synthesis of Nanocubic Pyrite Crystals Using Greigite Fe3S4 and Thiourea as Precursors
	Xin Nie; Suxing Luo; Meizhi Yang; Ping Zeng; Zonghua Qin; Wenbin Yu; Quan Wan
	2019
发表期刊	Minerals
页码	1-13
摘要	Nanocubic pyrite (FeS2) crystals with exposed (100) crystal faces and sizes of 100–200 nm were successfully synthesized via a facile hydrothermal method using greigite (Fe3S4) as the iron precursor and thiourea (NH2CSNH2) as the sulfur source. When the concentration of thiourea was 40 mmol/L, both pyrite and hematite were observed in the as-prepared sample, indicating incomplete conversion of greigite into pyrite. With an increased thiourea concentration to 80 mmol/L, pyrite was found to be the only crystalline phase in the synthesized samples. All greigite could be transformed to pyrite within 24 h via the hydrothermal method, while further prolonging the hydrothermal time had insignificant effect on the crystal phase composition, crystallinity, and morphologies of the prepared nanocubic pyrite crystals. In contrast, when a mixture of Na2S and S powder was used to replace the thiourea as the sulfur source, tetragonal, orthorhombic, cubic, and irregular pyrite crystal particles with sizes of 100 nm–1 μm were found to co-exist in the prepared samples. These results demonstrate the critical influence of sulfur source on pyrite morphology. Furthermore, our hydrothermal process, using a combination of greigite and thiourea, is proved to be effective in preparing nanocubic pyrite crystals. Our findings can also provide new insight into the formation environments and pathways of nanocubic pyrite under hydrothermal conditions.
关键词	Nanocubic Pyrite Hydrothermal Synthesis Greigite Thiourea
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.gyig.ac.cn/handle/42920512-1/10474
专题	矿床地球化学国家重点实验室
作者单位	1.State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China 2.University of Chinese Academy of Sciences, Beijing 100049, China 3.Zunyi Normal College, Zunyi 563002, China 4.CAS Center for Excellence in Comparative Planetology, Hefei 230026, China
推荐引用方式 GB/T 7714	Xin Nie；Suxing Luo；Meizhi Yang；Ping Zeng；Zonghua Qin；Wenbin Yu；Quan Wan. Facile Hydrothermal Synthesis of Nanocubic Pyrite Crystals Using Greigite Fe3S4 and Thiourea as Precursors[J]. Minerals,2019:1-13.
APA	Xin Nie；Suxing Luo；Meizhi Yang；Ping Zeng；Zonghua Qin；Wenbin Yu；Quan Wan.(2019).Facile Hydrothermal Synthesis of Nanocubic Pyrite Crystals Using Greigite Fe3S4 and Thiourea as Precursors.Minerals,1-13.
MLA	Xin Nie；Suxing Luo；Meizhi Yang；Ping Zeng；Zonghua Qin；Wenbin Yu；Quan Wan."Facile Hydrothermal Synthesis of Nanocubic Pyrite Crystals Using Greigite Fe3S4 and Thiourea as Precursors".Minerals (2019):1-13.

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