Tailoring of Crystal Phase Distinct Cu 2– x S Templates for Polymorphic Synthesis of Binary Metal Sulfide Nanoparticles

作者：Yan Zhang, Shaobo He, Jiakai Wu, Zili Yao, Mei‐Li Wu, Yichuan Wang, Luhui Wang, Lihui Chen · 发表于：Inorganic Chemistry · 年份：2025 · DOI：10.1021/acs.inorgchem.5c01887 · 被引用次数：3 · 研究领域：Quantum Dots Synthesis And Properties、Chalcogenide Semiconductor Thin Films、Copper-based nanomaterials and applications

Cation exchange (CE) reaction utilizing the Cu 2– x S nanoparticles (NPs) as the template is an attractive approach to address the limitations in the current polymorphic synthesis of metal sulfide NPs. As such, preformation of the Cu 2– x S NPs with the hexagonal phase and cubic phase is highly desired. Here, we report a facile crystal phase tailoring of Cu 2– x S NPs by tuning the amount of the sulfur precursor thiourea. Hexagonal phase roxbyite Cu 1.8 S NPs with a disk-like shape were preferentially synthesized at a low amount of thiourea, and it progressively shifted to cubic phase digenite Cu 1.8 S as the amount of thiourea increased. Pure digenite Cu 1.8 S NPs with a polyhedral shape were synthesized at a large amount of thiourea. An excess of thiourea is essential to the generation of reactive H 2 S and thus the formation of digenite Cu 1.8 S. By means of CE reactions of roxbyite Cu 1.8 S and digenite Cu 1.8 S NPs with Cd 2+, Zn 2+, and Mn 2+, binary wurtzite and zinc blende CdS, ZnS, and MnS NPs were produced. The morphology of the two-phase Cu 1.8 S templates was generally preserved, except for the wurtzite MnS NPs. The resulting CdS and ZnS NPs exhibit fine chemical stabilities, while the MnS NPs exhibit poor chemical stability. Both of the wurtzite and zinc blende MnS NPs were evolved into small Mn 3 O 4 NPs by air oxidation. Therefore, our research achievements suggest the significance of phase tailoring of the Cu 2– x S templates, holding great promise in the synt...