A Hierarchical Porous towards High Performance CO2 capture and Congo Red Adsorption

Abstract

Abstract To achieve the goal of carbon neutrality, controlling CO2 emissions is a primary problem to be solved in the current environmental protection field. Eliminating the environmental pollution of dyes in industrial wastewater is also an urgent problem to be solved in the field of environmental protection. The adsorption technique is an effective way to deal with these two issues. Developing high-efficiency adsorbents to work in the adsorption field. In this work, a two steps carbonization method has been developed to prepare porous carbon by a carbonization procedure. The morphology and structure of the prepared porous carbon were investigated by SEM, XPS, XRD, and BET techniques. Selectively optimization, the as-prepared porous carbon materials exhibit a high specific surface area of 1476 m2 g− 1 and a high total pore volume of 0.951 cm3 g− 1. The PCMCA-900 shows the highest CO2 uptake of 7.67 mmol g− 1 at 0 ºC, stable cycling stability. Moreover, when PCMCA-900 was used as an adsorbent to remove Congo red in water, an adsorption capacity of 652.3 mg g− 1 was achieved. The above-mentioned results prove that potassium citrate derived porous carbon is a desirable candidate for excellent CO2 adsorption and Congo red in industrial wastewater.