Structural evolution induced by Au atom diffusion in Ag 2 S

Structural evolution induced by Au atom diffusion in Ag 2 S

Atom diffusion processes govern the structure and composition of core–shell nanomaterial, which play a crucial role in determining their properties. By using aberration-corrected high-resolution transmission electron microscopy and X-ray absorption near-edge structure spectroscopy in combination wit...

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Veröffentlicht in:Chemical communications (Cambridge, England) England), 2019-10, Vol.55 (87), p.13176-13178
Hauptverfasser: Jin, Benjin, Zhang, Fu, Wu, Geng, Yuan, Tongwei, Wang, Qian, Zhou, Huang, Zhao, Yafei, Zhang, Genqiang, Hong, Xun
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container_end_page 13178
container_issue 87
container_start_page 13176
container_title Chemical communications (Cambridge, England)
container_volume 55
creator Jin, Benjin
Zhang, Fu
Wu, Geng
Yuan, Tongwei
Wang, Qian
Zhou, Huang
Zhao, Yafei
Zhang, Genqiang
Hong, Xun
description Atom diffusion processes govern the structure and composition of core–shell nanomaterial, which play a crucial role in determining their properties. By using aberration-corrected high-resolution transmission electron microscopy and X-ray absorption near-edge structure spectroscopy in combination with in situ X-ray diffraction, we confirm that single-atom diffusion of Au to Ag 2 S occurs, and that the transition from the Au@Ag 2 S core–shell nanostructure to AuAgS–AuAg x or Ag 3 AuS 2 –AuAg x heterostructures was observed. Moreover, the phase of the ternary sulfide induced by Au single-atom diffusion in Ag 2 S is determined by the ratio of Au and Ag, thus exhibiting a significant difference in the photocatalytic activity performance.
doi_str_mv 10.1039/C9CC07660C
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title Structural evolution induced by Au atom diffusion in Ag 2 S
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