Recent development in the environmental application of nano-sized MgO

Porous Magnesium Oxide by Twin Polymerization: From Hybrid Materials to Catalysis

“…[34] The respective MgO-based heterogeneous catalysts are accessible by solgel, [26,[35][36][37] template synthesis, [15,23,[38][39][40][41] and thermal decomposition [13,[42][43][44] processes of mainly magnesium chlorides, nitrates, alkoxides and β-diketonates. [45][46][47] Twin polymerization allows the preparation of nano-structured organic-inorganic hybrid materials (twin polymers) by an acid-, base-catalyzed or thermally induced ring-opening reaction of, for example, 2,2'-spiro-bi[4H-1,3,2-benzodioxasiline] within one synthetic step. [48][49][50] During the polymerization process a strong mechanistic coupling between the formation of a penetrating network consisting of an inorganic and organic phase leads to dispersed SiO 2 domains on a nanometer scale within a phenolic resin.…”

“…The combination Cu@MgO facilitates simultaneous hydrogenation and dehydrogenation reactions, [31–33] while CuO‐supported on MgO catalyzes the stereoselective single boronation of alkynes [34] . The respective MgO‐based heterogeneous catalysts are accessible by sol‐gel, [26,35–37] template synthesis, [15,23,38–41] and thermal decomposition [13,42–44] processes of mainly magnesium chlorides, nitrates, alkoxides and β ‐diketonates [45–47] …”

Theoretical Designing of Atomically Precise MgO/TiO2(001) Quantum Dot-Sensitized Solar Cell for High Visible Light Absorption and Fast Charge Injection

“…During the past decade, TiO 2 has become one of the most popular electrode materials for photovoltaic and QDSSC applications. , The performance of TiO 2 is attributed to its unique photovoltaic and photochemical properties such as nontoxicity, low-cost, high chemical stability, suitable band gap (about 3.2 eV), and ideal position of the conduction band edge, and therefore, it has been recognized as the most appropriate semiconductor for the DSSCs. , Moreover, the anatase TiO 2 (001) surface possesses higher surface energy (0.90 Jm 2– ) compared to the thermodynamically stable (101) surface (0.44 Jm 2– ), and thus, anatase TiO 2 (001) surface has been effectively utilized for DSSCs. − Magnesium oxide (MgO) a low-cost, nontoxic, and naturally abundant material coated on TiO 2 exhibited excellent properties toward CO 2 photoreduction, , water treatment, and DSSCs , applications. In addition, coating of MgO thin-layer/film on TiO 2 increases dye adsorption, decreases trap states, and suppresses charge recombination at the interface for DSSCs applications. , Moreover, nanosized MgO possesses high surface reactivity and adsorption capacity, which can be effectively used for adsorbent of environmental pollutants . Recently, Chen et al , predicted that small nanoclusters of rocksalt MgO have much smaller yet tunable optical gaps than the nanoparticles and bulk systems.…”

Selective Adsorption of Hazardous Substances from Wastewater by Hierarchical Oxide Composites: A Review

“…Therefore, with rational design, preparation, and modification of functional groups, hierarchical oxide composites show great potential for selective adsorption of specific pollutants from wastewater. Applications of hierarchically structured metal oxides, including cobalt oxide, iron oxide, and ceria, for the removal of As(V) and Cr(VI) ions in water [5], metal oxide heterostructures for arsenic removal from contaminated water [6], MgO with micro-nanostructures and composites of nano-MgO-based materials focusing on their composition and application [7], and different hierarchical nanostructures of TiO2 for energy and environmental applications [8] have been concisely reviewed. Thereafter, rationally designing appropriate hierarchical oxide composites for effective removal of hazardous pollutants has been the top strategy for wastewater treatment.…”