Hollow Structured Kapok Fiber-Based Hierarchical PorousBiocarbons for Ultrahigh Adsorption of Organic Dyes

作者：Yu, Weiqi; Xu, Jun^*; Li, Jinpeng; Zhu, Shiyun; Xie, Junxian; Zhou, Ziyong; Bin Wang; Li, Jun; Chen, Kefu

来源：Industrial and Engineering Chemistry Research, 2022, 61(11): 4114-4124.

DOI：10.1021/acs.iecr.1c04783

• ACTIVATED CARBON
• CONGO RED
• WATER-TREATMENT
• METHYL-ORANGE
• REMOVAL
• ADSORBENT
• NANOPARTICLE
• PERFORMANCE
• NANOFIBER
• COMPOSITE

The activated carbon (AC) adsorption technologyhas been widely used in wastewater purification. Naturalfiber-based AC is a group of emerging biomass adsorbents for dyeadsorption; however, poor adsorption performance and a highpreparation cost bring many limitations to its large-scaleapplications. Kapokfiber (KF) is a desirable and promising carbonsource due to its low cost, renewability, unique hollow structure,and rich carbon content. Herein, novel KF-derived hierarchicalporous biocarbons (KHPBs) were fabricated through a feasibletwo-step carbonization approach for the high-performance removalof cationic and anionic dyes from wastewater. The combinedhollow structure and hierarchical pore structure of KHPBs greatlyenlarged the adsorption capacity and removal rate of organic dyes.Due to their outstanding specific surface area (1455 m2/g) and pH responsiveness, the KHPBs possessed a large adsorption capacityof 1983.39 mg/g to Congo Red (CR). Moreover, theflexible KHPBfilter element showed remarkable continuousfiltration capacityto a cationic binary dye system, and the removal rate of it was almost 100% after 10 continuousfiltrations. Therefore, the as-preparedKHPBs have a great application prospect as a highly efficient, economical, and eco-friendly adsorbent in organic dye waste water purification

• 单位
  广东工业大学