Jump to main content
Jump to site search


Controllable synthesis of hierarchical nanoporous ε-MnO2 crystals for the highly effective oxidation removal of formaldehyde

Author affiliations

Abstract

Hierarchical nanoporous ε-MnO2 crystals were prepared through thermal decomposition of hydrothermally-synthesized MnCO3 precursors without any external templates or surfactants. Through reactant altering, cubes, nano-block aggregated microspheres and nanoparticle aggregated microspheres of ε-MnO2 could be selectively generated. After preparation of ε-MnO2, the filtrate containing triethylene glycol (TEG) and ethylene diamine (EDA) could be reused to synthesize the MnCO3 precursor. Since the thermal decomposition of the MnCO3 precursor not only led to formation of a hierarchical ε-MnO2 structure but also increased the specific surface area, the catalytic performance of the formed ε-MnO2 in the oxidation of formaldehyde (HCHO) was enhanced. The specific surface area of nanoparticle aggregated microspheres was 168.3 m2 g−1 in which HCHO conversion could remain above 96% over 72 h with 160 ppm HCHO and 84 000 mL g−1 h−1 of gas hourly space velocity.

Graphical abstract: Controllable synthesis of hierarchical nanoporous ε-MnO2 crystals for the highly effective oxidation removal of formaldehyde

Back to tab navigation

Publication details

The article was received on 29 Mar 2019, accepted on 22 May 2019 and first published on 25 May 2019


Article type: Paper
DOI: 10.1039/C9CE00466A
CrystEngComm, 2019, Advance Article

  •   Request permissions

    Controllable synthesis of hierarchical nanoporous ε-MnO2 crystals for the highly effective oxidation removal of formaldehyde

    S. Zhang, L. Zhao, Y. Wu, Y. Pang, X. Yue, B. Li, Q. Li and J. Zhang, CrystEngComm, 2019, Advance Article , DOI: 10.1039/C9CE00466A

Search articles by author

Spotlight

Advertisements