Facile temperature-controlled synthesis of hexagonal Zn2GeO4 nanorods with different aspect ratios toward improved photocatalytic activity for overall water splitting and photoreduction of CO2

Single-crystalline hexagonal prism Zn2GeO4 nanorods with different aspect ratios have been prepared via a solution phase route, which exhibits improved photocatalytic activities in overall water splitting and photoreduction of CO2 due to the low crystal defects, high specific surface area and beneficial microstructure on the catalyst's surface.