催化作用
循环经济
材料科学
焚化
热解
碳化
废物管理
城市固体废物
环境污染
氢经济
碳纤维
化学工程
环境科学
复合材料
制氢
化学
有机化学
复合数
工程类
扫描电子显微镜
生态学
环境保护
生物
作者
Qingyu Liu,Dongyang Jiang,Hui Zhou,Xiangzhou Yuan,Chunfei Wu,Changsong Hu,Rafael Luque,Shurong Wang,Sheng Chu,Rui Xiao,Huiyan Zhang
标识
DOI:10.1073/pnas.2305078120
摘要
Current un-sustainable plastic management is exacerbating plastic pollution, an urgent shift is thus needed to create a recycling society. Such recovering carbon (C) and hydrogen (H) from waste plastic has been considered as one practical route to achieve a circular economy. Here, we performed a simple pyrolysis-catalysis deconstruction of waste plastic via a monolithic multilayer stainless-steel mesh catalyst to produce multiwalled carbon nanotubes (MWCNTs) and H 2 , which are important carbon material and energy carrier to achieve sustainable development. Results revealed that the C and H recovery efficiencies were as high as 86% and 70%, respectively. The unique oxidation-reduction process and improvement of surface roughness led to efficient exposure of active sites, which increased MWCNTs by suppressing macromolecule hydrocarbons. The C recovery efficiency declined by only 5% after 10 cycles, proving the long-term employment of the catalyst. This catalyst can efficiently convert aromatics to MWCNTs by the vapor–solid–solid mechanism and demonstrate good universality in processing different kinds of waste plastics. The produced MWCNTs showed potential in applications of lithium-ion batteries and telecommunication. Owing to the economic profits and environmental benefits of the developed route, we highlighted its potential as a promising alternative to conventional incineration, simultaneously achieving the waste-to-resource strategy and circular economy.
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