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

作　　者：Chun Yao Jiangwei Chang Yiwang Ding Chang Yu Jieshan Qiu 

机构地区：[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

出　　处：《Chinese Journal of Chemical Engineering》2021年第9期159-167,共9页中国化学工程学报（英文版）

基　　金：partly supported by the National Natural Science Foundation of China(51872035 and 22078052);Talent Program of Rejuvenation of the Liaoning(XLYC1807002);Innovation Program of Dalian City(2019RJ03)。

摘　　要：Carbon nanotubes(CNTs)have been far and wide employed as the counter electrodes(CEs)in dyesensitized 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 dye3,4,9,10-perylene tetracarboxylic dianhydride(PTCDA)is used as a precursor and glutamic acid efficiently promotes the recrystallization of the perylene cores'planarπ-conjugated system in PTCDA under hydrothermal conditions and then self-assembles into one-dimensio nal nano rods 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 of8.25%,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 

分 类 号：TB383.1[一般工业技术—材料科学与工程] TQ127.11[化学工程—无机化工] TM914.4[电气工程—电力电子与电力传动]