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采用电化学阳极氧化法制备了阳极氧化钛纳米管(Anodic TiO2 Nanotubes(ATNT)),用场发射扫描电镜和高分辨透射电镜表征了其形貌,并研究了ATNT的形貌对其光解水性能的影响。结果表明,阳极氧化120 min(长度为16.781μm)的ATNT光电流密度最高。此外,为了改善ATNT表面缺陷,又采用原子层沉积(ALD)法在ATNT表面沉积了一层高质量Al2O3,结果表明,经过钝化后的ATNT,其光电流密度相对于没有Al2O3层的ATNT提高了50%。
Anodic TiO2 nanotubes (ATNT) were prepared by electrochemical anodic oxidation. Their morphology was characterized by field emission scanning electron microscopy (SEM) and high resolution transmission electron microscopy (TEM) Impact. The results show that the anodic oxidation 120 min (length of 16.781μm) ATNT photocurrent density highest. In addition, in order to improve ATNT surface defects, a layer of high quality Al2O3 was deposited on the surface of ATNT by atomic layer deposition (ALD) method. The results showed that the photocurrent density of ATNT after passivation was higher than that of without ATEL 50%.