Ti-Au alloy nano-tube photonic crystal electrode with high periodicity and construction method thereof

The invention relates to a Ti-Au alloy nano-tube photonic crystal electrode with high periodicity and a construction method thereof. The photonic crystal electrode comprises TiO2 and Au which is uniformly doped in TiO2 crystal lattices, and is divided into upper and lower layers, wherein nano-pores are formed in the upper layer, and nano-tube arrays are arranged in the lower layer. The construction method comprises the following steps: (1) anodizing in a constant-temperature water bath by using a pre-treated Ti-Au alloy plate as an anode, a platinum gauze electrode as a counter electrode and an ethylene glycol solution containing fluoride and water as an anodizing electrolyte solution to obtain a nano-tube attached Ti-Au alloy plate; (2) carrying out ultrasonic treatment on the nano-tube attached Ti-Au alloy plate, and then continuously anodizing in the constant-temperature water bath to obtain an electrode sample; and (3) washing the electrode sample, soaking in ethanol, drying and heating to obtain a target product Ti-Au alloy nano-tube photonic crystal electrode. Compared with the prior art, the photonic crystal electrode has good photoelectrocatalysis performance, simple preparation process, low cost, high application value and the like.