High-yield production of carbon nanotubes from waste polyethylene and fabrication of graphene-carbon nanotube aerogels with excellent adsorption capacity  

作　　者：Zhong Huang Yangfan Zheng Haijun Zhang Faliang Li Yuan Zeng Quanli Jia Jun Zhang Junyi Li Shaowei Zhang 

机构地区：[1]The State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,China [2]Henan Key Laboratory of High Temperature Functional Ceramics,Zhengzhou University,Zhengzhou 450052,China [3]College of Engineering,Mathematics and Physical Sciences,University of Exeter,Exeter EX44QF,United Kingdom

出　　处：《Journal of Materials Science & Technology》2021年第35期90-98,共9页材料科学技术（英文版）

基　　金：supported by National Natural Science Foundation of China(Nos.51872210,51672194);Program for Innovative Teams of Outstanding Young and Middle-aged Researchers in the Higher Education Institutions of Hubei Province(No.T201602);Key Program of Natural Science Foundation of Hubei Province,China(No.2017CFA004)。

摘　　要：Waste plastics recycling and oil/organics remediation are environmental issues of global concern.In this work,a protectant was introduced,for the first time,to make highly efficient catalysts for pyrolysis of waste plastics into carbon nanotubes(CNTs)with high yield.By using waste polyethylene,Co(NO_(3))_(2) and oleylamine respectively as carbon source,catalyst precursor and protectant,a yield as high as 59.0%was achieved.The CNTs exhibited a high adsorption capacity for methylene blue(up to 107.1 mg/g).Furthermore,by combining the CNTs with graphene oxide,a graphene-CNT aerogel with a low density of8.2 mg/cm^(3)and high porosity of 96.0%was successfully prepared.It showed excellent hydrophobicity and mechanical stability,as well as high adsorption capacity of 289-410 g/g oil/organic solvent,which was much higher than most of these achieved by carbon-based three-dimensional materials reported previously,making the as-prepared aerogel a very promising adsorbent for oil/water separation.

关 键 词：Waste plastics Carbon nanotubes Pyrolysis OLEYLAMINE AEROGEL Oil/organics remediation 

分 类 号：X705[环境科学与工程—环境工程] TQ424[化学工程] TQ427.26