Well-ordered organic–inorganic hybrid layered manganese oxide nanocomposites with excellent decolorization performance

Well-ordered organic–inorganic hybrid layered manganese oxide nanocomposites (CTAB-Al-MO) with excellent decolorization performance were prepared through a two-step process. Specifically, the MnO2 nanosheets were self-assembled in the presence of CTAB, and subsequently pillared with Keggin ions. The obtained CTAB-Al-MO with the basal spacing of 1.59 nm could be stable at 300 °C for 2 h and also possesses high total pore volumes (0.41 cm³ g−1) and high specific BET surface area (161 m2 g−1), which is nine times larger than that of the pristine (19 m2 g−1). Possible formation process for the highly thermal stable CTAB-Al-MO is proposed here. The decolorization experiments of methyl orange showed that the obtained CTAB-Al-MO exhibit excellent performance in wastewater treatment and the decolorization rate could reach 95% within 5 min.

Graphical AbstractWell-ordered organic–inorganic hybrid LMO nanocomposites (CTAB-Al-MO) with excellent decolorization performance were prepared through a two-step process. Specifically, the MnO2 nanosheets were self-assembled by CTAB, and subsequently pillared with Keggin ions.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► A two-step synthesis method was used to prepare the CTAB-Al-MO. ► The CTAB-Al-MO has the large basal spacing and high specific BET surface area. ► The thermal stability of the well-ordered CTAB-Al-MO could obviously improve. ► The CTAB-Al-MO exhibits excellent oxidation and absorption ability to remove organic pollutants.