将废弃聚对苯二甲酸乙二酯转化为氮掺杂碳纳米管及其在氧还原反应和从受污染水中去除双酚A中的应用。

Transforming Waste Poly(Ethylene Terephthalate) into Nitrogen Doped Carbon Nanotubes and Its Utility in Oxygen Reduction Reaction and Bisphenol-A Removal from Contaminated Water.

作者信息

Sridhar Vadahanambi, Park Hyun

机构信息

Global Core Research Centre for Ships and Offshore Plants (GCRC-SOP), Pusan National University, Busan 46241, Korea.

Department of Naval Architecture and Ocean Engineering, Pusan National University, Busan 46241, Korea.

出版信息

Materials (Basel). 2020 Sep 17;13(18):4144. doi: 10.3390/ma13184144.

DOI:10.3390/ma13184144

PMID:32957727

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7560256/

Abstract

Till date, waste plastics are either down-cycled to cheap products like fibers or burnt in incinerators to generate heat. In this manuscript, we report a simple and effective technique for microwave induced transformation of waste polyethylene terephthalate (wPET) to carbon nano-tubes (CNT). Iron nano-particles dispersed on graphene substrate acted as catalyst for CNT growth whereas urea served the dual role of de-polymerisation of wPET and also as nitrogen doping agent. Application of our newly synthesized 3-D meso-porous graphene-nitrogen doped carbon nanotube- iron electrode (Fe@NCNT-rGO) as electro-catalyst for oxygen reduction reaction (ORR) shows a positive half-wave potential (E) of 0.75 V vs. RHE (reversible hydrogen electrode), nearly ideal four-electron pathway and excellent methanol tolerance when compared to commercial 20% Pt/C. The utility of Fe@NCNT-rGO for removal of bisphenol A from contaminated waters is also reported.

摘要

到目前为止，废塑料要么被降级循环利用制成纤维等廉价产品，要么在焚烧炉中燃烧以产生热量。在本论文中，我们报道了一种简单有效的技术，用于通过微波诱导将废聚对苯二甲酸乙二酯（wPET）转化为碳纳米管（CNT）。分散在石墨烯基底上的铁纳米颗粒充当碳纳米管生长的催化剂，而尿素则起到了使wPET解聚以及作为氮掺杂剂的双重作用。我们新合成的三维介孔石墨烯 - 氮掺杂碳纳米管 - 铁电极（Fe@NCNT - rGO）作为氧还原反应（ORR）的电催化剂，相对于可逆氢电极（RHE）显示出0.75 V的正半波电位（E），与商用20% Pt/C相比，具有近乎理想的四电子途径和出色的甲醇耐受性。本文还报道了Fe@NCNT - rGO用于从受污染水体中去除双酚A的效用。