研究目的
To develop a new covalent functionalization approach of BP nanosheets (BPNSs) via azide functionalization, leading to significant enhancement of its ambient stability.
研究成果
Azide functionalization is developed as a new covalent functionalization approach of BPNSs, leading to the formation of unprecedented P=N double bonds, which passivate the reactive BPNSs effectively and contribute to a dramatic enhancement of the ambient stability of BPNSs, with the degradation ratio inhibited by ~12 times relative to the pristine BPNSs.
研究不足
The study focuses on the covalent functionalization of BPNSs with azide, and the stability enhancement is compared primarily with diazonium-functionalized BPNSs. The long-term stability under various environmental conditions and the scalability of the functionalization process are not extensively explored.
1：Experimental Design and Method Selection:
The reaction scheme involves liquid-exfoliated black phosphorus nanosheets (BPNSs) and 4-azidobenzoic acid, stirred in an argon-filled inert condition at 140 oC for 48 hours.
2：Sample Selection and Data Sources:
Bulk BP was prepared by a phase transformation reaction from red phosphorus, followed by liquid exfoliation in dimethyl formamide (DMF) affording BPNSs.
3：List of Experimental Equipment and Materials:
BPNSs, 4-azidobenzoic acid, DMF, isopropanol.
4：Experimental Procedures and Operational Workflow:
BPNSs were dispersed in DMF and blended with 4-azidobenzoic acid, stirred in an argon-filled inert condition at 140 oC for 48 hours, centrifuged, washed with isopropanol, and dried in a vacuum oven.
5：Data Analysis Methods:
FTIR, solid-state 31P NMR, XPS, TEM, HR-TEM, STEM-EDX, UV-vis spectroscopic studies.
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