Nanostructured manganese oxides: natural/artificial formation and their induced catalysis for wastewater remediation

Abstract

Manganese oxides, with low toxicity and wide adaptability, have been demonstrated as promising catalysts for substituting noble metals/oxides in a diversity of chemical reactions.

Recent progresses in the synthesis of MnO2 nanowire and its application in environmental catalysis

“…30 The a-MnO 2 nanowire also displayed the best catalytic activity toward gaseous benzene oxidation among the MnO 2 -based nanomaterials with different morphologies (e.g., wire and rod-like a-MnO 2 , b-MnO 2 microrods) even aer decorating Co 3 O 4 nanoparticles. 31 In recent years, more and more advanced and important materials have been developed for the applications of MnO 2based nanomaterials in the removal of environmental pollutants, 32,33 biosensing, 34 theranostic, 35 especially in the eld of electrochemistry. [36][37][38] For example, Li et al 37,38 synthesized a-MnO 2 nanowires with outstanding circulation stability, demonstrated rate performance, and high specic capacitance for supercapacitor electrode.…”

MnO2‐Based Materials for Environmental Applications

“…In this regard, in past years, much encouraging experimental and computational developments on MnO 2 ‐based materials have been accomplished, providing a considerable approach for working on high‐efficiency environmental applications. Although there have been some reviews of MnO 2 ‐based materials on the topic of electrochemical energy storage and conversion applications, [ 43–49 ] electrocatalytic water oxidation, [ 50 ] wastewater remediation, [ 51,52 ] catalytic oxidation of airborne formaldehyde, [ 53,54 ] biosensing, biomedicine applications [ 55 ] as well as theranostic applications, [ 56,57 ] until now, there has been no target review summarizing their comprehensive environmental applications (water treatment, air purification, and MW adsorption). A systematic overview of frontier scientific research on the modulation of nanostructured MnO 2 ‐based materials for environmental application is urgent.…”

The chemodynamic antibacterial effect of MnOX nanosheet decorated silicon nanowire arrays

“…Manganese oxides (oxides, hydroxides and oxyhydroxides) produced by spontaneous oxidation have the advantages of low cost, simple preparation, and low biological toxicity 32 . Because of its multiple valence states and multiple structural morphologies 33 , and the rapid transfer of electrons and oxygen 34 , manganese oxide is considered to be a potential catalyst. By interacting with various peroxides, manganese oxide can catalyze the production of ROS 35,36 Please do not adjust margins Please do not adjust margins efficiency of ROS is unsatisfied, which restricts the sterilization effect of related materials.…”