Morphology effects of CeO2 for catalytic oxidation of formaldehyde

Water pretreatment promoting the removal of indoor formaldehyde over nano-CeO2 at ambient temperature

“…52.2%) in 8 h over the hydrothermally prepared CeO 2 catalyst in the same test apparatus. 9 In addition, the as-prepared CeO 2 catalyst shows an obviously enhanced HCHO oxidation activity compared to the other reported CeO 2 , 39 MnO x –CeO 2 40 and CeO 2 /SiO 2 41 at room temperature. The specific surface area, pore size, number of surface defects and active oxygen species that existed in the CeO 2 sample could be responsible for HCHO removal and its subsequent oxidation, which is explored in the following investigation.…”

Construction of strongly-coupled CeO2/MnO2 heterogeneous catalysts for highly-efficient removal of formaldehyde

“…36 The presence of Ce 3+ leads to the formation of oxygen vacancies on the surface of CeMn-0.5, which influence the redox properties of CeMn-0.5. 37 It can be concluded that the strong interaction between CeO 2 and MnO 2 on the CeMn-0.5 surface resulted in the redox cycle formation (Ce 3+/4+ and Mn 3+/4+ ).…”

Thermocatalytic Degradation of Gaseous Formaldehyde Using Transition Metal‐Based Catalysts

“…[20,28b,29b,33] For instance, the CeO 2 spherical-like aggregate of nanoplates exhibited excellent FA oxidation activity (e.g., relative to CeO 2 nanorods and nanocubes) with the aid of the abundant surface hydroxyl and oxygen groups (Figure 4): It was reported to achieve a maximum conversion of 87% against 500 ppm FA at The SEM, TEM, and HRTEM images of CeO 2 : a1-a3) CeO 2 spherical-like aggregate of nanoplates, b1-b3) CeO 2 nanorods, and c1-c3) CeO 2 nanocubes, Reproduced with permission. [34] Copyright 2022, Elsevier.…”

“…120 °C with a GHSV of 10 L g −1 h −1 . [34] A stable fluorite structure of CeO 2 (consisting Ce 4+ and Ce 3+ ions) with a 2D sheet-like morphology and high concentration of OVs was also observed to completely degrade 50 ppm FA at 310 °C. [16a] In another study, a 3D MnO 2 structure with an interconnected network structure was developed through a freeze-drying method.…”