NiO/TiO2纳米管阵列异质结电极的制备及光电化学性能

采用阳极氧化方法在金属钛表面制备TiO2纳米管阵列,管内径为60~90 nm,壁厚约为15 nm,长度为600 nm,通过化学镀Ni并结合空气中热处理过程,在TiO2表面生长出NiO纳米颗粒层,厚度约为200 nm,颗粒尺寸为20~40 nm,获得异质结型NiO/TiO2纳米管阵列复合电极.结果表明,在100 mW/c...

Preparation and Photoelectrochemical Property of NiO/TiO_2 Nanotube Arrays Heterojunction Electrode

TiO₂ nanotube arrays were prepared by means of anodizing method on the surface of titanium films. The packed n\|type TiO₂ tubes have an inner pore diameter of 60-90 nm, a wall thickness of approximately 15 nm and a length of 600 nm. The NiO/TiO₂ heterojunction electrode was synthesized by means of electroless plating and annealing which resulted in TiO₂ nanotube arrays coated with a layer (about 200 nm in thickness) of NiO particles (20-40 nm). The results show that NiO/TiO₂ heterojunction electrode enhanced photoelectrochemical property under 100 mW/cm2 irradiation. The photocurrent density is 3.05 mA/cm2, and photoelectricity conversion efficiency is 1.41％ at a bias voltage of 0.65 V.