Abstract

The synthesis of interconnected nanoporous carbon (NPC) material from direct annealing of ultra-small Al-based metal–organic complex (Al-MOC) has been demonstrated. NPC presents a large accessible area of 1054 m2/g, through the Methylene Blue (MB) adsorption method, which is comparable to the high specific surface area (SSA) of 1593 m2/g, through an N2 adsorption/desorption analysis. The adsorption properties and mechanisms were tested by various dye concentrations, pH, and temperature conditions. The high MB accessible area and the good electrical conductivity of the interconnected NPC, led to a large specific capacitance of 205 F/g, with a potential window from 0 to 1.2 V, in a symmetric supercapacitor, and a large energy density of 10.25 Wh/kg, in an aqueous electrolyte, suggesting a large potential in supercapacitors.

Highlights

  • Nanoporous carbon (NPC) materials with large specific surface area (SSA), have been applied in different fields, especially, as electrode materials and dye adsorbents [1,2,3]

  • Used dyes become harmful, due to the fact that they can reduce light penetration and photosynthesis in water, but can contain toxic and carcinogenic chemicals that might be a threat to human health [4]

  • The morphology of NPC material is presented by SEM and Transmission electron microscopy (TEM)

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Summary

Introduction

Nanoporous carbon (NPC) materials with large specific surface area (SSA), have been applied in different fields, especially, as electrode materials and dye adsorbents [1,2,3]. Removing dyes from industrial waste water, through efficient technologies, is quite urgent. Methylene Blue (MB) has become a model cationic dye for dye adsorption investigations [6,7] Various adsorbents, such as biomass materials [8,9,10,11,12], carbon nanotubes [13,14,15,16], graphene-based materials [17,18,19,20], and magnetic materials [21,22], have been investigated in the field of dye removal. Researchers always use the MB adsorption method to test the surface area of carbon samples, which can indicate the accessible surface of electrodes [23,24]

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