A vacuum calcination route to high-surface-area MgO nanoplates for superior arsenate adsorption and catalytic properties. (December 2018)

• Record Type: Journal Article
• Authors: Wang, Jing; Zhang, Junping; Chen, Ruosong; Yang, Cheng; Xiang, Lan; Yi, Meigui
• Is Part Of: Vacuum. Volume 158(2018)
• Page Start: 231
• Page End: 235
• Publication Date: 2018-12
• Subjects: Porous MgO -- High surface area -- Vacuum calcination -- Arsenate adsorption -- Base catalyst; Vacuum -- Periodicals; 621.55
• DOI: 10.1016/j.vacuum.2018.10.009
• Languages: English
• ISSNs: 0042-207X

Abstract

Abstract: Porous MgO nanoplates with high surface area has been synthesized by a vacuum calcination route using industrially available Mg(OH)2 as the precursor. The vacuum calcination not only promoted the phase transformation of Mg(OH)2 to MgO at a low temperature (300 °C), but also inhibited the thermally-induced particle growth and pore coalescence, leading to the formation of MgO nanoplates with fine grain sizes (5.5 nm), ultrasmall pores (2–4 nm) and high surface area (390 m 2 g −1 ). The as prepared MgO nanoplates exhibited superior arsenic adsorption properties with a maximum adsorption capacity of 481.0 mg g −1, as well as excellent catalytic activity for the Claisen-Schmidt condensation reaction. Highlights: Porous MgO nanoplates was synthesized by a simple vacuum calcination route using industrial available Mg(OH)2 as the precursor. The as synthesized MgO nanoplates are featured with fine grain sizes (5.5 nm), ultrasmall pores (2–4 nm) and high surface area (390 m 2 g −1 ). The vacuum calcination not only promoted the phase transformation of Mg(OH)2 to MgO at a low temperature (300 °C), but also inhibited the thermal-induced particle growth and pore coalescence. The as synthesized MgO nanoplates exhibited superior arsenic adsorption properties, as well as an excellent catalytic activity for the Claisen-Schmidt condensation reaction.