Phosphorus-Doped Graphene Oxide Layer as a Highly Efficient Flame Retardant

Area of Science:

• Materials Science
• Nanotechnology
• Chemical Engineering

Background:

• Graphene oxide (GO) is a versatile material with potential applications in various fields.
• Developing efficient methods for doping GO with heteroatoms is crucial for enhancing its properties.
• Flame retardants are essential for improving material safety in numerous applications.

Purpose of the Study:

• To develop a simple and efficient method for doping graphene oxide with phosphorus.
• To investigate the flame retardation properties of the synthesized phosphorus-doped graphene oxide (PGO).
• To explore the potential for low-cost mass production of PGO for practical applications.

Main Methods:

• Phosphorus doping of graphene oxide was achieved using polyphosphoric acid and phosphoric acid.
• The pH was controlled around 5 using NaOH solution during the synthesis.
• Characterization techniques included XPS, FT-IR, XRD, Raman spectroscopy, TGA, and SEM.
• Flame retardation properties were evaluated by coating cloth with PGO and testing its response to flame.

Main Results:

• A straightforward process for producing phosphorus-doped graphene oxide (PGO) was established.
• PGO-coated cloth demonstrated excellent flame retardation, resisting fire for over 120 seconds.
• The PGO-coated cloth maintained its shape with minimal shrinkage, unlike untreated cloth which burned completely.
• Characterization confirmed the successful doping of phosphorus onto the graphene oxide surface.

Conclusions:

• The developed method offers a general and low-cost approach for mass-producing PGO.
• PGO exhibits significant potential as an effective flame retardant material.
• This technique paves the way for broader applications of phosphorus-doped carbon nanomaterials.