Selective Preparation of Mo<sub>2</sub>N and MoN with High Surface Area for Flexible SERS Sensing.
basic_science · Level V
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- Record sourced from PubMed, PMID 33970632.
- Also identified by DOI 10.1021/acs.nanolett.1c01099.
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Abstract
γ-Mo<sub>2</sub>N and δ-MoN are the two most important molybdenum nitrides, but controllable preparation of them with high surface area has not been achieved. Herein, we achieved selective preparation of γ-Mo<sub>2</sub>N and δ-MoN. The key factor for the selective preparation of γ-Mo<sub>2</sub>N and δ-MoN is to control the crystal phase of the precursor MoO<sub>3</sub>. In H<sub>2</sub>O and NH<sub>3</sub> mixed gas, the α-MoO<sub>3</sub> nanoribbons are nitridated to obtain γ-Mo<sub>2</sub>N single-crystal porous nanobelts, while the h-MoO<sub>3</sub> prisms are nitrided to obtain δ-MoN hierarchical porous columns. The corrosion effect of H<sub>2</sub>O plays a key role in the formation of single-crystal porous structure. The γ-Mo<sub>2</sub>N flexible membrane composed of the single-crystal porous nanobelts exhibits strong localized surface plasmon resonance and surface enhanced Raman scattering effect, which show highly sensitive response to polychlorinated phenol.