Chemical conversion synthesis of magnetic Fe1-xCox alloy nanosheets with controlled composition

Chemical conversion provides a versatile platform for the synthesis of advanced nanomaterials with targeted phase, composition, and architecture. Here, we report a trioctylphosphine (TOP)-driven chemical conversion route to transform lamellar Fe1-xCoxS1.2-DETA (x = 0.1, 0.3, 0.5, 0.7, DETA = diethylenetriamine) inorganic-organic hybrid solid solutions into two-dimensional (2D) single-crystal Fe1-xCox alloy with controllable composition and dimensionality. Synergetic transformation coupled with DETA removal and sulfur extraction of lamellar Fe0.9Co0.1S1.2-DETA hybrids was examined in detail. The highest magnetization of 175 emu g(-1) was recorded for the prepared Fe0.7Co0.3. Our results not only provide a new lamellar inorganic-organic hybrid solid solution but also extend the chemical conversion strategy to the synthesis of previously unavailable magnetic alloy nanosheets.

Automated summary

Chemical conversion is used to synthesize advanced nanomaterials with specific characteristics. In this study, a chemical conversion route driven by trioctylphosphine was used to transform lamellar Fe1-xCoxS1.2-DETA inorganic-organic hybrid solid solutions into 2D single-crystal Fe1-xCox alloy with controllable composition and dimensionality. The prepared Fe0.7Co0.3 alloy showed the highest magnetization, demonstrating the versatility of the chemical conversion strategy.