Multiplicative rGO/Cu-BDC MOF for 4-nitrophenol reduction and supercapacitor applications

Area of Science:

• Materials Science
• Nanotechnology
• Electrochemistry

Background:

• Two-dimensional nanosheets are crucial for applications like water splitting, supercapacitors, and catalysis.
• Metal-organic frameworks (MOFs) offer tunable properties for various chemical processes.

Purpose of the Study:

• To synthesize Cu-BDC MOF nanosheets using Cu2O nanotubes and H2BDC.
• To create a nanocomposite by combining Cu-BDC MOF nanosheets with reduced graphene oxide (rGO).
• To investigate the synergistic effects of the Cu-BDC MOF/rGO nanocomposite on catalytic reduction and electrochemical energy storage.

Main Methods:

• Cu-BDC MOF nanosheets were synthesized using Cu2O nanotubes as the metal ion source and H2BDC as the organic linker.
• The Cu-BDC MOF nanosheets were combined with reduced graphene oxide (rGO) to form a nanocomposite.
• The catalytic reduction of 4-nitrophenol to 4-aminophenol using sodium borohydride was studied, along with electrochemical performance evaluations.

Main Results:

• The Cu-BDC MOF/rGO nanocomposite demonstrated enhanced catalytic efficiency for 4-nitrophenol reduction.
• The catalytic process followed the Langmuir-Hinshelwood mechanism with apparent pseudo-first-order kinetics.
• The rGO/Cu-BDC MOF nanocomposite exhibited a specific capacity of 656.4 mA h/g at 2 A/g, outperforming Cu-BDC MOF alone (468.4 mA h/g), and improved the operating voltage window.

Conclusions:

• The synergistic effect between Cu-BDC MOF nanosheets and rGO significantly boosts catalytic and electrochemical properties.
• Electrodes based on rGO/Cu-BDC MOF nanosheets offer a promising avenue for environmental remediation and advanced energy storage solutions.