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  • Peng et al_HAZMAT_2020

    Rights statement: This is the author’s version of a work that was accepted for publication in Journal of Hazardous Materials. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of Hazardous Materials, 396, 2020 DOI: 10.1016/j.jhazmat.2020.122750

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MnO2-decorated N-doped carbon nanotube with boosted activity for low-temperature oxidation of formaldehyde

Research output: Contribution to journalJournal articlepeer-review

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  • Shuai Peng
  • Xixian Yang
  • James Strong
  • Binoy Sarkar
  • Qiang Jiang
  • Feng Peng
  • Defei Liu
  • Hailong Wang
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Article number122750
<mark>Journal publication date</mark>5/09/2020
<mark>Journal</mark>Journal of Hazardous Materials
Volume396
Number of pages10
Publication StatusPublished
Early online date19/04/20
<mark>Original language</mark>English

Abstract

Low-temperature oxidative degradation of formaldehyde (HCHO) using non-noble metal catalysts is challenging. Herein, novel manganese dioxide (MnO2)/N-doped carbon nanotubes (NCNT) composites were prepared with varying MnO2 content. The surface properties and morphologies were analyzed using X-ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM) and transmission electron microscope (TEM). Comparing with MnO2/carbon nanotubes (CNTs) catalyst, the 40% MnO2/NCNT exhibited much better activity and selectivity for HCHO oxidation, mineralizing 95% of HCHO (at 100 ppm) into CO2 at 30 °C at a gas hourly space velocity (GHSV) of 30,000 mL h-1  g-1. Density functional theory (DFT) calculation was used to analyze the difference in the catalytic activity of MnO2 with CNTs and NCNT carrier. It was confirmed that the oxygen on NCNT was more active than CNTs, which facilitated the regeneration of MnO2. This resulted in remarkably boosted activity for HCHO oxidation. The present work thus exploited an inexpensive approach to enhance the catalytic activity of transition metal oxides via depositing them on a suitable support.

Bibliographic note

This is the author’s version of a work that was accepted for publication in Journal of Hazardous Materials. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of Hazardous Materials, 396, 2020 DOI: 10.1016/j.jhazmat.2020.122750