摘要
The one-dimensional titanium oxide(TiO_2) nanotubes(TONT) can be rationally fabricated in the fluoridecontaining electrolyte by electrochemical anodization. The high-speed growth of TONT for elongated nanotubes is highly desirable because the undesirable chemical etching will induce ‘‘nanograss" on the top of nanotubes and restrain the continued elongation of nanotubes. Herein, the external fields were employed to accelerate the growth of TONTs and obtain the elongated TONT arrays. A growth rate up to 18 lm/h was achieved under the presence of reduced pressure(0.07 MPa) and UV light(365 nm) stimulation. The generation of longer nanotube arrays could be attributed to the applied fields, which facilitate timely gas pumping out and induce chemical equilibrium shift forward. The TONT films obtained under different parameters were subsequently employed as anodes for photoelectrochemical(PEC) water splitting. The photocurrent(at 0 V vs Ag/Ag Cl) of TONT electrode obtained under external fields represented a 50% enhancement compared with the photoanode produced by the conventional method.
The one-dimensional titanium oxide （TiO2） nanotubes （TONT） can be rationally fabricated in the fluoridecontaining electrolyte by electrochemical anodization. The high-speed growth of TONT for elongated nanotubes is highly desirable because the undesirable chemical etching will induce ＂nanograss＂ on the top of nanotubes and restrain the continued elongation of nanotubes. Herein, the external fields were employed to accelerate the growth of TONTs and obtain the elongated TONT arrays. A growth rate up to 18 μm/h was achieved under the presence of reduced pressure （0.07 MPa） and UV light （365 nm） stimulation. The generation of longer nanotube arrays could be attributed to the applied fields, which facilitate timely gas pumping out and induce chemical equilibrium shift forward. The TONT films obtained under different parameters were subsequently employed as anodes for photoelectrochemical （PEC） water splitting. The photocurrent （at 0 V vs Ag/AgCI） of TONT electrode obtained under external fields represented a 50% enhancement compared with the pbotoanode produced by the conventional method.
基金
supported by the National Natural Science Foundation of China(61622407,61474128,21503261 and 61504155)
Science&Technology Commission of Shanghai Municipality(14JC1492900)
the Youth Innovation Promotion Association,Chinese Academy of Sciences(2013302)
the CAS President’s International Fellowship for Visiting Scientists(2016TW1GA0001)
the Youth Innovation Fund for Interdisciplinary Research of SARI(Y526453233)
Development Fund for Information communication and integrated circuit technology public service platform(No.2016-14)supported by Zhangjiang Administrative Committee
