Synthesis of highly monodisperse porous manganese oxide spheres using a butyric acid microemulsion

Abstract

Porous manganese oxide spheres form readily from a reaction between KMnO4 and n-butanol in aqueous butyric acid under ambient conditions. Spheres have uniform size, tuneable diameters and high surface areas. The material is an active catalyst for the oxidation of isopropanol to acetone.

Size-Tailored Porous Spheres of Manganese Oxides for Catalytic Oxidation via Peroxymonosulfate Activation

“…Moreover, the concentration of KMnO 4 can influence the size of the spheres: the higher concentration, the larger the diameter of the particles. 27 The textural properties of the samples were studied by nitrogen sorption. As seen in Figures 3A and 3C, the samples of PM-S, PM-M, PM-L (PM-0), and PM-200 showed type IV isotherms, illustrating a mesoporous structure.…”

“…The porous manganese oxide spheres with different sizes were synthesized via a one-step hydration route developed from a reported procedure Scheme shows the detailed synthesis processes of the spheres.…”

Solution Plasma-Assisted Green Synthesis of MnO2Adsorbent and Removal of Cationic Pollutant

“…To overcome this problem, design and synthesis of nanostructured MnO 2 are essential for improving adsorption capability through the expanding interfacial area. Although various synthesis techniques such as hydrothermal, microwave irradiation, template-assist method, coprecipitation, and microemulsion method are utilized for preparation, they required toxic chemical agents or longer process time and higher temperature [12][13][14][15]. us, a significant current focus in the advancement of green synthesis is satisfying both ecofriendly and energy-saving.…”

Mesoporous-assembled MnO2 with large specific surface area

“…One is a small hysteresis loop occurs at the relative pressure (P/P 0 ) between 0.4 and 0.8, which is related to the filling and emptying of mesopores by capillary condensation. And the other is an obvious increasing step of the nitrogen adsorption volume at the relative pressure 15 higher than 0.9, suggesting the presence of secondary pores due to the aggregation of particles with uniform size. 19 M oreover, a new pore size distribution at around 1.5 nm is observed except the pore size distribution between 2.5-4.0 nm, further supporting the micropore presence of secondary pores.…”

“…13 Although manganese oxide electrodes with various structures and morphologies have been prepared via different routes, their specic surface area is lower than 290 m 2 g À1 . In addition, although hard/so templates (e.g., SBA-15, 14 n-butanol, 15 P123, 11 etc.) can be used to prepare mesoporousassembled MnO 2 with large specic surface area, the preparation process is complicated and time-consuming.…”