SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2020, Vol. 28 ›› Issue (1): 254-265.DOI: 10.1016/j.cjche.2019.03.030

• Energy, Resources and Environmental Technology • 上一篇    下一篇

Platanus orientalis leaves based hierarchical porous carbon microspheres as high efficiency adsorbents for organic dyes removal

Xuezhen Jiang, Panpan Sun, Lin Xu, Yingru Xue, Heng Zhang, Wancheng Zhu   

  1. Department of Chemical Engineering, Qufu Normal University, Qufu 273165, China
  • 收稿日期:2019-01-09 修回日期:2019-03-12 出版日期:2020-01-28 发布日期:2020-03-31
  • 通讯作者: Wancheng Zhu
  • 基金资助:
    Supported by the National Natural Science Foundation of China (21276141), the State Key Laboratory of Chemical Engineering, China (SKL-ChE-17A03).

Platanus orientalis leaves based hierarchical porous carbon microspheres as high efficiency adsorbents for organic dyes removal

Xuezhen Jiang, Panpan Sun, Lin Xu, Yingru Xue, Heng Zhang, Wancheng Zhu   

  1. Department of Chemical Engineering, Qufu Normal University, Qufu 273165, China
  • Received:2019-01-09 Revised:2019-03-12 Online:2020-01-28 Published:2020-03-31
  • Contact: Wancheng Zhu
  • Supported by:
    Supported by the National Natural Science Foundation of China (21276141), the State Key Laboratory of Chemical Engineering, China (SKL-ChE-17A03).

摘要: Water contamination caused by hazardous organic dyes has drawn considerable attention, among all of the techniques released, adsorption has been widely used, which however to a large degree is dependent on the development of high efficiency adsorbents. Waste biomass based porous carbon is becoming the new star class of adsorbents, and thus contribute more to the sustainable development of the society. In this work, for the first time to the best of our knowledge, abundant waste fallen Platanus orientalis leaves are employed as the raw material for hierarchical activated porous carbon (APC) microspheres via a mild hydrothermal carbonization (210℃, 12.0 h) followed by one-step calcination (750℃, 1.0 h). The APC microspheres exhibit a specific surface area of 1355.53 m2·g-1 and abundant functional groups such as O—H and C=O. Furthermore, the APC microspheres are used as the adsorbents for removal of RhB and MO, with the maximum adsorption capabilities of 557.06 mg·g-1 and 327.49 mg·g-1, respectively, higher than those of the most porous carbon originated from biomass. The adsorption rates rapidly approach to 98.2% (RhB) and 95.4% (MO) within 10 min. The adsorption data can be well fitted by Langmuir isotherm model and the pseudo-second-order kinetic model, meanwhile the intra-particle diffusion and Boyd models simultaneously indicate that the diffusion within the pores is the main rate-limiting step. Besides, the APC microspheres also demonstrate good recyclability, and may also be applied to other areas such as heterogeneous catalysis and energy storage.

关键词: Porous carbon microspheres, Biomass, Hydrothermal carbonization, Platanus orientalis, Organic dye, Adsorption

Abstract: Water contamination caused by hazardous organic dyes has drawn considerable attention, among all of the techniques released, adsorption has been widely used, which however to a large degree is dependent on the development of high efficiency adsorbents. Waste biomass based porous carbon is becoming the new star class of adsorbents, and thus contribute more to the sustainable development of the society. In this work, for the first time to the best of our knowledge, abundant waste fallen Platanus orientalis leaves are employed as the raw material for hierarchical activated porous carbon (APC) microspheres via a mild hydrothermal carbonization (210℃, 12.0 h) followed by one-step calcination (750℃, 1.0 h). The APC microspheres exhibit a specific surface area of 1355.53 m2·g-1 and abundant functional groups such as O—H and C=O. Furthermore, the APC microspheres are used as the adsorbents for removal of RhB and MO, with the maximum adsorption capabilities of 557.06 mg·g-1 and 327.49 mg·g-1, respectively, higher than those of the most porous carbon originated from biomass. The adsorption rates rapidly approach to 98.2% (RhB) and 95.4% (MO) within 10 min. The adsorption data can be well fitted by Langmuir isotherm model and the pseudo-second-order kinetic model, meanwhile the intra-particle diffusion and Boyd models simultaneously indicate that the diffusion within the pores is the main rate-limiting step. Besides, the APC microspheres also demonstrate good recyclability, and may also be applied to other areas such as heterogeneous catalysis and energy storage.

Key words: Porous carbon microspheres, Biomass, Hydrothermal carbonization, Platanus orientalis, Organic dye, Adsorption