“…The prepared nanorod-shaped Co 3 O 4 , with (110) planes and active Co 3+ species predominantly exposed, shows their efficient oxidation catalytic activity to CO . The metal oxide nanomaterials, especially Fe 3 O 4 nanoparticles, are well-known for their excellent adsorption properties for arsenic. ,, With the combination of the excellent catalytic properties of noble metals with the good adsorption ability of the metal oxide, Au@Fe 3 O 4 and Au/α-MnO 2 nanocomposites were constructed and achieved excellent performance in the detection of arsenic. , Redox-active iron-based minerals are ubiquitously present in soil and water environments; their extraordinary redox properties have been widely applied in accelerating the electron transfer of redox reactions such as organic pollutant digestion and electrochemical processes. − Furthermore, the Fe 2+ in Fe 3 O 4 could be partially or completely replaced by other divalent transition ions (such as Co 2+ , Ni 2+ , Mn 2+ ) and have good electrocatalytic performance. − Among these various complex ferrites, the extensively studied CoFe 2 O 4 exhibited its unique advantages including good adsorption capacity toward As(III). − …”