Sweet-Potato-Vine-Based High-Performance Porous Carbon for Methylene Blue Adsorption

Wenlin Zhang; Yuhong Zhao; Qinhong Liao; Zhexin Li; Dengwei Jue; Jianmin Tang

doi:10.3390/molecules28020819

Sweet-Potato-Vine-Based High-Performance Porous Carbon for Methylene Blue Adsorption

Molecules. 2023 Jan 13;28(2):819. doi: 10.3390/molecules28020819.

Authors

Wenlin Zhang^{1

2}, Yuhong Zhao^{1

3}, Qinhong Liao¹, Zhexin Li¹, Dengwei Jue¹, Jianmin Tang¹

Affiliations

¹ Chongqing Key Laboratory of Economic Plant Biotechnology, College of Landscape Architecture and Life Science/Institute of Special Plants, Chongqing University of Arts and Sciences, Yongchuan, Chongqing 402160, China.
² College of Food Science, Southwest University, Beibei, Chongqing 400716, China.
³ College of Biology and Food Engineering, Chongqing Three Gorges University, Wanzhou, Chongqing 404199, China.

Abstract

In this study, sweet-potato-vine-based porous carbon (SPVPC) was prepared using zinc chloride as an activating and pore-forming agent. The optimised SPVPC exhibited abundant porous structures with a high specific surface area of 1397.8 m² g^-1. Moreover, SPVPC exhibited excellent adsorption characteristics for removing methylene blue (MB) from aqueous solutions. The maximum adsorption capacity for MB reached 653.6 mg g^-1, and the reusability was satisfactory. The adsorption kinetics and isotherm were in good agreement with the pseudo-second-order kinetics and Langmuir models, respectively. The adsorption mechanism was summarised as the synergistic effects of the hierarchically porous structures in SPVPC and various interactions between SPVPC and MB. Considering its low cost and excellent adsorption performance, the prepared porous carbon is a promising adsorbent candidate for dye wastewater treatment.

Keywords: adsorption; methylene blue; porous carbon; sweet potato vine.

MeSH terms

Adsorption
Carbon / chemistry
Ipomoea batatas*
Kinetics
Methylene Blue / chemistry
Porosity
Solanum tuberosum*
Water Pollutants, Chemical*

Substances

Carbon
Methylene Blue
Water Pollutants, Chemical

Grants and funding

This study was supported by Chongqing University of Arts and Sciences Natural Science Major Cultivation Project (P2022LS14) and Special Grant for Chongqing Postdoctoral Researcher Research Project (2021XM3050).