Natural hydroxyapatite‐supported MnO₂: a green heterogeneous catalyst for selective aerobic oxidation of alkylarenes and alcohols

Abstract

Natural hydroxyapatite‐supported MnO2 (MnO2@NHAp) was easily prepared in situ from reduction of potassium permanganate with natural hydroxyapatite derived from cow bones in water at room temperature, and its structure was characterized using flame atomic absorption spectroscopy, X‐ray diffraction, thermogravimetric analysis, scanning electron microscopy and energy dispersive spectroscopy. The catalytic activity of the synthesized catalyst was investigated for the aerobic oxidation of alkylarenes and alcohols. MnO2@NHAp shows excellent catalytic performance for the oxidation of alkylarenes and alcohols to their corresponding carbonyl compounds without using any other oxidizing agent. This catalyst can be readily recycled and reused for several runs without any significant loss of efficiency. Copyright © 2016 John Wiley & Sons, Ltd.

Evaluation of mechanical and biocompatibility properties of hydroxyapatite/manganese dioxide nanocomposite scaffolds for bone tissue engineering application

“…01‐074‐0566) 28 . The obtained patterns are in agreement with Kim et al 29 and Heidari et al 30,31 MnO 2 peaks were also seen at angles of 18.20, 28.88, 35.46, 37.5, 41.97, 49.39, and 60.3° 26,32 . Given that the intensity of the peaks of the pattern of Figure 2B is greater than that of Figure 2A, it is concluded that the HA crystallinity increased by adding MnO 2 .…”

Aerobic Oxygenation of Alkylarenes over Ultrafine Transition‐Metal‐Containing Manganese‐Based Oxides

“…[16][17][18][19][20][21][22][23][24] In particular,t heir oxidation catalysis is of great interest, and thus numerousa erobic oxidation systemst hat use catalysts based on manganese oxide have been developed. [25][26][27][28][29][30][31][32][33][34][35][36][37][38][39] As fora lkylarene oxygenation, several catalysts based on manganese oxide have also been reported to be highly effective (Table S2); [40][41][42][43][44] for example, Hara and colleagues reported recently that nanosized hexagonal SrMnO 3 perovskite exhibits ah igh catalytic performance for alkylarene oxygenation under relatively mild conditions (60-120 8C, 1atm O 2 ,n oa dditives). [43,44] In this study,w ep repared heterogeneous catalysts based on manganese oxide for alkylarene oxygenation and we considered the following factors.…”

Silver nanoparticles supported on ionic‐tagged magnetic hydroxyapatite as a highly efficient and reusable nanocatalyst for hydrogenation of nitroarenes in water

“…Moreover, the relatively high surface area and appropriate pore size of inorganic supports maintain their competitive advantages over others . Hydroxyapatite is a potentially useful material for designing new functionalized heterogeneous catalysts, because of its properties such as thermal and chemical stability, biocompatibility, adsorption capacity, high surface area and ionic substitution ability . Magnetic NPs, as nanotemplate and support for the synthesis of nanometric heterogeneous hosts for Ag NPs, provide quasi‐homogeneous reaction conditions.…”