Determinants of crystal structure transformation of ionic nanocrystals in cation exchange reactions

doi:10.1126/science.abh2741

GSTDTAP > 气候变化

DOI	10.1126/science.abh2741
	Determinants of crystal structure transformation of ionic nanocrystals in cation exchange reactions
	Zhanzhao Li; Masaki Saruyama; Toru Asaka; Yasutomi Tatetsu; Toshiharu Teranishi
	2021-07-16
发表期刊	Science
出版年	2021
英文摘要	Cation exchange reactions that change the composition of a nanocrystal (NC) under mild conditions usually preserve the sublattice of the larger anions. Li et al. found that the shape of roxbyite (Cu1.8S) nanocrystals, which have a distorted, hexagonal, close-packed sulfide anion sublattice, affected the outcome of exchange reactions with cobalt ions. Flat nanoplates retained the anion lattice and formed cobalt sulfide, but tall nanorods transformed into Co9S8 nanocrystals with a cubic, close-packed structure. Facile crystal plane sliding in the taller nanocrystals appears to have driven the different layer stacking of sulfide anions. Science , abh2741, this issue p. [332][1] Changes in the crystal system of an ionic nanocrystal during a cation exchange reaction are unusual yet remain to be systematically investigated. In this study, chemical synthesis and computational modeling demonstrated that the height of hexagonal-prism roxbyite (Cu1.8S) nanocrystals with a distorted hexagonal close-packed sulfide anion (S2−) sublattice determines the final crystal phase of the cation-exchanged products with Co2+ [wurtzite cobalt sulfide (CoS) with hexagonal close-packed S2– and/or cobalt pentlandite (Co9S8) with cubic close-packed S2–]. Thermodynamic instability of exposed planes drives reconstruction of anion frameworks under mild reaction conditions. Other incoming cations (Mn2+, Zn2+, and Ni2+) modulate crystal structure transformation during cation exchange reactions by various means, such as volume, thermodynamic stability, and coordination environment. [1]: /lookup/doi/10.1126/science.abh2741
领域	气候变化 ; 资源环境
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文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/334392
专题	气候变化资源环境科学
推荐引用方式 GB/T 7714	Zhanzhao Li,Masaki Saruyama,Toru Asaka,et al. Determinants of crystal structure transformation of ionic nanocrystals in cation exchange reactions[J]. Science,2021.
APA	Zhanzhao Li,Masaki Saruyama,Toru Asaka,Yasutomi Tatetsu,&Toshiharu Teranishi.(2021).Determinants of crystal structure transformation of ionic nanocrystals in cation exchange reactions.Science.
MLA	Zhanzhao Li,et al."Determinants of crystal structure transformation of ionic nanocrystals in cation exchange reactions".Science (2021).