“…Recently, such potential applications as electrode material for Li-ion batteries and dye-sensitized solar cells (DSSCs) have been demonstrated [12,[14][15][16]. In the literatures, ZTO has been prepared via thermal evaporation [7], high-temperature calcinations [17,18], sol-gel synthesis [10], ball-milling [19], chemical vapor deposition [20], radio frequency magnetron sputtering [13,21], hydrothermal reaction [12,[22][23][24] and thermal plasma [25]. However, it is difficult to obtain a single phase of ZTO by conventional solid-state reaction.…”