“…There are a diversity of approaches to develop metal/metal oxide NPs, for instance precipitation, hydrothermal, micro-emulsion, sol–gel, and sonochemical technique, which usually provide adequate products for various applications ( Ghazal et al, 2020 , Medhi et al, 2020 , Yadav et al, 2020 ). Manganese oxides is a mixed oxide material are appropriate for wide range applications such as catalysis, electrochemical, medicinal due to their low cost, eco-friendly nature, existence of manganese in various states and their natural abundance ( Hoseinpour and Ghaemi, 2018 , Kumar et al, 2017 , Wang et al, 2017 ).…”