摘要：
在众多光阳极材料中,纳米结构材料 α-Fe2O3由于其光吸收显著、化学稳定性好、储量丰富等优势,被认为是最有前途的材料之一.利用水热法制备了具有良好光解水性能的 Co和 P掺杂α-Fe2O3纳米材料.经过掺杂后 α-Fe2O3纳米材料仍为纳米棒状形貌,纳米棒的粒径增加.实验发现,Co掺杂 α-Fe2O3制成的电极在标准光照射下的最大光生电流密度为0.453 mA／cm2,是未掺杂样品的20.6 倍,P掺杂 α-Fe2O3制成的电极在标准光照射下的最大光生电流密度为0.276 mA／cm2,是未掺杂样品的1 2.5 倍,具备了高效光解水性能.同时通过 SEM、TEM、XRD、UV-Vis 和 Mott-Schottky 测试等方法,结合形貌与结构表征,研究了 α-Fe2O3的光电化学分解水性能影响机理.%Among many photoanode materials,the nanostructured material α-Fe2O3 is considered as one of the most promising materials due to its remarkable light absorption,good chemical stability and abundant re-serves.Co and P doped α-Fe2O3 nanomaterials with excellent water splitting properties were prepared by hy-drothermal method.After doping,α-Fe2O3 nanomaterial is still nanorod shaped,and the particle size of nano-rods increases.Experiments show that the maximum photocurrent density has reached 0.453 mA／cm2(Co doped α-Fe2O3)and 0.276 mA／cm2(P doped α-Fe2O3)in the standard light,which are 20.6 and 12.5 times higher than those of the undoped samples,respectively.Thus,they have the property of efficient photo-catalytic water splitting.At the same time,we used SEM,TEM,XRD,UV-Vis,and Mott-Schottky testing methods,which are combined with the morphology and structure characterization,to study the property influ-ence mechanism of photoelectrochemical water splitting of α-Fe2O3.
