Preparation and exceptional adsorption performance of porous MgO derived from a metal–organic framework

Abstract

Porous MgO-hex and MgO-dhp materials were synthesized by annealing metal–organic framework [NH4][Mg(HCOO)3], and exhibit excellent adsorption capacities toward Congo red.

Atomic-scale investigation of MgO growth on fused quartz using angle-dependent NEXAFS measurements

“…40 The catalytic applications of this material have attracted a lot of research in different disciplines in recent years. [41][42][43][44] Thus, the importance of MgO in several applications and the emergence of novel phenomena makes it a preferred choice for this investigation. Moreover, the NEAXFS spectra of the MgO system are sensitive to any external treatment [45][46][47][48] and are able to give layer-by-layer information on thin lms.…”

A solid-state chemical method for synthesizing MgO nanoparticles with superior adsorption properties

“…The superior maximum adsorption value of 2375 mg g À1 towards CR adsorption in solution at various initial concentrations in the range of 400-1400 mg L À1 for 1 h at natural pH and room temperature on the as-obtained MgO adsorbent was nearly equal to the reported superhigh adsorption capacity, 1,30 which was superior to that in most reports. 16,25,28,37 This showed that MgO nanoparticles prepared via the facile solvent-free chemical reaction manifested outstanding adsorption properties.…”

“…In solution, CR would be adsorbed to the surface of MgO through a neutralization reaction. 28 To determine the surface basicity of the prepared MgO samples, temperature-programmed desorption (TPD) of CO 2 curves were obtained, as shown in Fig. 2c.…”

“…1,[25][26][27] Studies over many years have found that the particle size and specic surface area are both signicant factors affecting the adsorption performance. 1,25,26,28 To improve the adsorption properties, decreasing the size and increasing the specic surface area using template agents or surfactants has become the general strategy. Furthermore, the surface basicity has also been found to have a crucial effect on the adsorption capacity.…”

“…30 Other MgO nanomaterials with different morphologies have also been synthesized in solution. [25][26][27][28][29] However, their synthesis usually requires complex preparation processes owing to multistep synthetic operations under solution conditions, resulting in unnecessary environmental pollution from the organic agents. Therefore, a simple and low-pollution method for synthesizing nanoscale MgO materials is needed for the study of adsorptive materials with excellent properties.…”