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Synthesis, Characterization, and Functionalization of Hybrid Au/CdS and Au/ZnS Core/Shell Nanoparticles
Published on: March 2, 2016
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Crystal structure dependent cation exchange reactions in Cu2-S nanoparticles
Lihui Chen1, Zhenzhen Kong2, Hengcong Tao1
1School of Petrochemical Engineering & Environment, Zhejiang Ocean University, No. 1, Haida South Road, Lincheng Changzhi Island, Zhoushan 316022, China. lihuichen@zjou.edu.cn.
Nanoscale
|February 28, 2022
Summary
Crystal structure significantly impacts cation exchange (CE) reactions in copper sulfide nanomaterials. Different crystal structures of copper sulfide templates lead to distinct cadmium sulfide products, influencing reaction pathways and outcomes.
Area of Science:
- Materials Science
- Nanotechnology
- Chemistry
Background:
- Copper sulfide (Cu₂-S) nanoparticles are widely used as cation exchange (CE) templates for complex nanomaterial synthesis.
- The structural similarity of common Cu₂-S phases can limit the study of crystal structure-dependent CE reactions.
Purpose of the Study:
- To investigate the effect of crystal structure on cation exchange reactions using djurleite Cu₁.₉₄S and covellite CuS nanodisks (NDs) as templates.
- To understand how crystal structure influences reaction dynamics, pathways, and final product morphology.
Main Methods:
- Utilized djurleite Cu₁.₉₄S and covellite CuS nanodisks as starting templates for cation exchange reactions.
- Controlled reaction conditions, including temperature, to study the formation of different nanomaterial structures.
Main Results:
- Djurleite Cu₁.₉₄S NDs readily exchanged Cu⁺ for Cd²⁺, forming solid wurtzite CdS NDs.
- Partial substitution in djurleite at lower temperatures yielded Janus-type Cu₁.₉₄S/CdS NDs, indicating kinetic and thermodynamic favorability.
- Covellite CuS NDs transformed into hollow CdS NDs under harsher conditions due to the rupture of disulfide bonds, forming CuS@CdS core-shell structures.
Conclusions:
- The crystal structure of the host copper sulfide material critically dictates the kinetics, thermodynamics, intermediates, and final products of cation exchange reactions.
- Tailoring the crystal structure of CE templates offers a pathway to control the morphology and composition of synthesized nanomaterials.
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