“…As a new kind of DMSs, 3d transition-metal doped indium oxide (TM-In 2 O 3 ) has been attracting increasing attentions for In 2 O 3 is not only widely applied in semiconductor and catalyst industries [2,3], but has also high solubility of TM ions [4]. Traditionally, TM doped or co-doped In 2 O 3 is usually prepared by physical methods such as laser ablation, pulsed laser deposition, solid state synthesis and combustion method; moreover, the samples are mainly focused on bulk, polycrystalline or thin film materials [5][6][7][8][9][10][11][12][13]. However, the reports on TM doped or co-doped In 2 O 3 nanomaterials are quite sparse.…”