SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2021, Vol. 37 ›› Issue (9): 159-167.DOI: 10.1016/j.cjche.2021.05.029

• Energy Science and Technology • 上一篇    下一篇

Glutamic acid-assisted hydrothermal recrystallization to configure bamboo-like carbon nanotubes for improved triiodide reduction

Chun Yao, Jiangwei Chang, Yiwang Ding, Chang Yu, Jieshan Qiu   

  1. State Key Laboratory of Fine Chemicals, Liaoning Key Laboratory for Energy Materials and Chemical Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
  • 收稿日期:2021-03-24 修回日期:2021-05-11 出版日期:2021-09-28 发布日期:2021-11-02
  • 通讯作者: Chang Yu, Jieshan Qiu
  • 基金资助:
    This work was partly supported by the National Natural Science Foundation of China (51872035 and 22078052), Talent Program of Rejuvenation of the Liaoning (XLYC1807002) and Innovation Program of Dalian City (2019RJ03).

Glutamic acid-assisted hydrothermal recrystallization to configure bamboo-like carbon nanotubes for improved triiodide reduction

Chun Yao, Jiangwei Chang, Yiwang Ding, Chang Yu, Jieshan Qiu   

  1. State Key Laboratory of Fine Chemicals, Liaoning Key Laboratory for Energy Materials and Chemical Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
  • Received:2021-03-24 Revised:2021-05-11 Online:2021-09-28 Published:2021-11-02
  • Contact: Chang Yu, Jieshan Qiu
  • Supported by:
    This work was partly supported by the National Natural Science Foundation of China (51872035 and 22078052), Talent Program of Rejuvenation of the Liaoning (XLYC1807002) and Innovation Program of Dalian City (2019RJ03).

摘要: Carbon nanotubes (CNTs) have been far and wide employed as the counter electrodes (CEs) in dye-sensitized solar cells because of their individual physical and chemical properties. However, the techniques available now, such as chemical vapor deposition, arc discharge and laser ablation for synthesizing CNTs, commonly suffer from rigorous operations and complicated steps, which make the process difficult to be controlled. Herein, we present a simple and facile glutamic acid-assisted hydrothermal recrystallization strategy to construct bamboo-like CNTs (GHP-BC-x). Generally, the conventional organic dye 3,4,9,10-perylene tetracarboxylic dianhydride (PTCDA) is used as a precursor and glutamic acid efficiently promotes the recrystallization of the perylene cores' planar π-conjugated system in PTCDA under hydrothermal conditions and then self-assembles into one-dimensional nanorods with improved crystallization degree, finally resulting in the morphology of bamboo-like CNTs after carbonization. When applied as the counter electrodes, the GHP-BC-3 displays a remarkable power conversion efficiency of 8.25%, benefiting from the superb electrical conductivity and mass transfer dynamics, superior to that of Pt CE (7.62%).

关键词: Hydrothermal recrystallization, Bamboo-like carbon nanotubes, Counter electrodes, Electrocatalysis, Triiodide reduction

Abstract: Carbon nanotubes (CNTs) have been far and wide employed as the counter electrodes (CEs) in dye-sensitized solar cells because of their individual physical and chemical properties. However, the techniques available now, such as chemical vapor deposition, arc discharge and laser ablation for synthesizing CNTs, commonly suffer from rigorous operations and complicated steps, which make the process difficult to be controlled. Herein, we present a simple and facile glutamic acid-assisted hydrothermal recrystallization strategy to construct bamboo-like CNTs (GHP-BC-x). Generally, the conventional organic dye 3,4,9,10-perylene tetracarboxylic dianhydride (PTCDA) is used as a precursor and glutamic acid efficiently promotes the recrystallization of the perylene cores' planar π-conjugated system in PTCDA under hydrothermal conditions and then self-assembles into one-dimensional nanorods with improved crystallization degree, finally resulting in the morphology of bamboo-like CNTs after carbonization. When applied as the counter electrodes, the GHP-BC-3 displays a remarkable power conversion efficiency of 8.25%, benefiting from the superb electrical conductivity and mass transfer dynamics, superior to that of Pt CE (7.62%).

Key words: Hydrothermal recrystallization, Bamboo-like carbon nanotubes, Counter electrodes, Electrocatalysis, Triiodide reduction