TY - JOUR
T1 - Controllable synthesis of carbon nanotubes via autothermal reforming of ethyl acetate
AU - Xue, Zhiwei
AU - Shen, Yuesong
AU - Li, Peiwen
AU - Zhang, Yu
AU - Zeng, Yanwei
AU - Zhu, Shemin
N1 - Funding Information:
We acknowledge the financial supports of the National Key Research and Development Program of China (No. 2016YFC0205500 ), the National Natural Science Foundation of China ( 51772149 ), and the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD) .
Publisher Copyright:
© 2017 Elsevier Ltd
PY - 2018/3/5
Y1 - 2018/3/5
N2 - Controllable synthesis of carbon nanotubes (CNTs) via autothermal reforming of ethyl acetate and waste cooking oil was studied for the first time. The products of the products were characterized by techniques of FESEM, XRD, HRTEM, Raman and XPS. Results revealed that reaction temperature, reaction time and reactants significantly affected the growth of CNTs. Ethyl acetate could be easily catalyzed into CNTs at 600 °C, which contained numerous defects and vacancies. High reaction temperatures led to the formation of CNTs with small diameter. The graphitization and purity of CNTs could be improved by increasing the reaction time. Besides, the amount of CNTs decreased by increasing the reaction time at low reaction temperature (< 600 °C), whereas increased at high reaction temperature (700 and 800 °C). In addition, increasing the amount of O2 and H2O in reactants reduced the formation of irregular carbon species and promoted the synthesis of CNTs with ultra-small diameter. Two growth mechanisms for synthesizing CNTs from ethyl acetate via autothermal reforming were proposed: “tip-growth” mechanism and “graphene-to-CNTs” mechanism. Furthermore, the real waste cooking oil was also successfully catalyzed into CNTs.
AB - Controllable synthesis of carbon nanotubes (CNTs) via autothermal reforming of ethyl acetate and waste cooking oil was studied for the first time. The products of the products were characterized by techniques of FESEM, XRD, HRTEM, Raman and XPS. Results revealed that reaction temperature, reaction time and reactants significantly affected the growth of CNTs. Ethyl acetate could be easily catalyzed into CNTs at 600 °C, which contained numerous defects and vacancies. High reaction temperatures led to the formation of CNTs with small diameter. The graphitization and purity of CNTs could be improved by increasing the reaction time. Besides, the amount of CNTs decreased by increasing the reaction time at low reaction temperature (< 600 °C), whereas increased at high reaction temperature (700 and 800 °C). In addition, increasing the amount of O2 and H2O in reactants reduced the formation of irregular carbon species and promoted the synthesis of CNTs with ultra-small diameter. Two growth mechanisms for synthesizing CNTs from ethyl acetate via autothermal reforming were proposed: “tip-growth” mechanism and “graphene-to-CNTs” mechanism. Furthermore, the real waste cooking oil was also successfully catalyzed into CNTs.
KW - Autothermal reforming
KW - Carbon nanotubes
KW - Controllable synthesis
KW - Ethyl acetate
KW - Waste cooking oil
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U2 - 10.1016/j.matdes.2017.12.030
DO - 10.1016/j.matdes.2017.12.030
M3 - Article
AN - SCOPUS:85039442928
VL - 141
SP - 150
EP - 158
JO - International Journal of Materials in Engineering Applications
JF - International Journal of Materials in Engineering Applications
SN - 0264-1275
ER -