MOF-derived metal oxide composite Mn₂Co₁O_x/CN for efficient formaldehyde oxidation at low temperature

Abstract

A novel MOF-derived MnCoOx nanoparticles embedded in porous N-doped carbon catalyst exhibits excellent catalytic activity for the low-temperature oxidation of formaldehyde.

Surface Lattice Oxygen Activation by Nitrogen-Doped Manganese Dioxide as an Effective and Longevous Catalyst for Indoor HCHO Decomposition

“…In the FTIR spectrogram of N-MnO 2 /NC and MnO 2 /C, the stretching vibration peak of CO is shown at 1580 cm –1 , indicating that C is present in the catalyst. The presence of carbon can increase the adsorption of HCHO and capture HCHO molecules to accelerate the reaction. , In addition, CO indicates that carbon contains oxygen, which means carbon has defects, and the lack of electrons in carbon is conducive to electron transfer. Tensile vibration caused by C–N is at 1265 cm –1 …”

“…for the first time selectively doped N atoms in the substituted or interstitial positions of the MnO 2 lattice by controlling the N 2 plasma processing time, and the catalyst showed 100% HCHO conversion rate for 180 ppm HCHO at 80 °C . In addition, the introduction of carbon into the catalyst can significantly facilitate the rapid transfer of electrons to increase the activity of catalytic oxidation, which can impede the aggregation of metal oxide nanoparticles simultaneously, thus improving the stabilization of the catalyst. , Peng et al used an in situ oxidation method to deposit MnO 2 directly on the surface of NCNT, and the MnO 2 /NCNT composite showed high activity and stability for the degradation of 100 ppm HCHO at 100 °C . As far as we know, the nitrogen-doping methods used in most studies are extremely complex, expensive, and time-consuming, often requiring high temperatures, special methods, and strict conditions.…”

Defect Engineering and Synergistic Effect in Co3O4 Catalysts for Efficient Removal of Formaldehyde at Room Temperature

“…The higher Co 3+ /Co 2+ molar ratios indicate a higher content of Co 3+ . The Co 3+ is generally treated as the main active species and it can increase the number of oxygen vacancies (Vo) . Therefore, the content of Vo is the highest on the surface of Co 3 O 4 -HP.…”

“…Therefore, it is significantly urgent to eliminate HCHO to ameliorate the indoor air environment and safeguard human health. In recent decades, tremendous endeavors have been made to regulate the HCHO pollutants . Various strategies on HCHO removal have been proposed, such as adsorption, photocatalytic decomposition, plasma catalysis, catalytic oxidation, and so on.…”

Size-controlled synthesis of spinel nickel ferrite nanorods by thermal decomposition of a bimetallic Fe/Ni-MOF

“…[24] The stoichiometry and morphology of pristine MOF crystals can be transformed via calcination to corresponding metal oxide nanomaterials [25,26] which exhibit uniform shape, hierarchical porosity [27], and high surface areas. [28][29][30][31] MOF-derived complex metal oxides and their nanocomposites show excellent potential for electromagnetic wave absorption, [32] volatile organic compound sensing, [33,34] in catalysis [35,36] and energy storage applications. [25,37] For instance, MOF-derived NiFe2O4 nanorods, [33] AFe2O4 (A= Ni, Co, Zn) nanocubes, [38] NiFe2O4 polyhedra [34] and NiFe2O4…”