Versatile synthesis of yolk/shell hybrid nanocrystals via ion-exchange reactions for novel metal/semiconductor and semiconductor/semiconductor conformations
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Yolk/shell (Y–S) hybrid nanoarchitectures, owing to the interior voids created for individualized catalyst applications, have emerged as new candidates for effectively isolating catalytic species. However, the well-defined hollow interiors with flexible core and shell compositions—such as noble-metal cores, metal-oxide cores, and widespread semiconductor shells—and a flexible anisotropic shape are far from the requirements. In particular, the introduction of catalytic noble metals or metal-oxide nanocrystals (NCs) with isotropic or anisotropic shapes into various hollow semiconductor structures with well-defined morphologies has been rarely reported but is urgently needed. Herein, we propose a strategy involving the careful sulfuration of as-prepared cavity-free core/shell NCs or metal-oxide NCs followed by phosphine-initialized cation-exchange reactions for preparing metal@semiconductor and metal oxide@semiconductor (II-VI) Y–S NCs. The geometry, size, and conformations of the core and shell are fully and independently considered. New and unprecendented metal@semiconductor and metal oxide@semiconductor (II-VI) Y–S NCs are prepared via widespread phosphine-initialized cation-exchange reactions.
Keywordsanion exchange cation exchange yolk/shell colloidal hybrid nanocrystals metal/semiconductor
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This work was supported by the National Natural Science Foundation of China (Nos. 21322105, 91323301, 51631001, 51372025, and 51501010).
- Meir, N.; Plante, I. J.; Flomin, K.; Chockler, E.; Moshofsky, B.; Diab, M.; Volokh, M.; Mokari, T. Studying the chemical, optical and catalytic properties of noble metal (Pt, Pd, Ag, Au)–Cu2O core–shell nanostructures grown via a general approach. J. Mater. Chem. A 2013, 1, 1763–1769.CrossRefGoogle Scholar
- Guan, B. Y.; Wang, T.; Zeng, S. J.; Wang, X.; An, D.; Wang, D. M.; Cao, Y.; Ma, D. X.; Liu, Y. L.; Huo, Q. S. A versatile cooperative template-directed coating method to synthesize hollow and yolk–shell mesoporous zirconium titanium oxide nanospheres as catalytic reactors. Nano Res. 2014, 7, 246–262.CrossRefGoogle Scholar
- Li, W.; Deng, Y. H.; Wu, Z. X.; Qian, X. F.; Yang, J. P.; Wang, Y.; Gu, D.; Zhang, F.; Tu, B.; Zhao, D. Y. Hydrothermal etching assisted crystallization: A facile route to functional yolk–shell titanate microspheres with ultrathin nanosheetsassembled double shells. J. Am. Chem. Soc. 2011, 133, 15830–15833.CrossRefGoogle Scholar
- Wang, L. Z.; Tang, F. Q.; Ozawa, K.; Chen, Z. G.; Mukherj, A.; Zhu, Y. C.; Zou, J.; Cheng, H. M.; Lu, G. Q. A general single-source route for the preparation of hollow nanoporous metal oxide structures. Angew. Chem., Int. Ed. 2009, 48, 7048–7051.Google Scholar