Co和P掺杂对α-Fe2O3光电化学催化分解水的影响

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12.5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。

Effect of Co and P doping on α-Fe2O3 photoelectrochemical catalysis water splitting

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.