Self-organized TiO_(2)Nanotube Arrays with Controllable Geometric Parameters for Highly Efficient PEC Water Splitting  

作　　者：WANG Tian-Ming CHEN Yan-Xin TONG Mei-Hong LIN Shi-Wei ZHOU Jing-Wen JIANG Xia LU Can-Zhong 王天明;陈燕鑫;童美虹;林世伟;周静文;姜霞;卢灿忠(CAS Key Laboratory of Design and Assembly of Functional Nanostructures,and Fujian Provincial Key Laboratory of Nanomaterials,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou 350002,China;College of Chemistry and Materials Science,Fujian Normal University,Fuzhou 350007,China;Xiamen Institute of Rare-earth Materials,Haixi Institutes,Chinese Academy of Sciences,Xiamen 361021,China)

机构地区：[1]CAS Key Laboratory of Design and Assembly of Functional Nanostructures,and Fujian Provincial Key Laboratory of Nanomaterials,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou 350002,China [2]College of Chemistry and Materials Science,Fujian Normal University,Fuzhou 350007,China [3]Xiamen Institute of Rare-earth Materials,Haixi Institutes,Chinese Academy of Sciences,Xiamen 361021,China

出　　处：《Chinese Journal of Structural Chemistry》2022年第2期159-167,I0012,共10页结构化学（英文）

基　　金：supported by the National Natural Science Foundation of China(21805280);Youth Innovation Foundation of Xiamen City(3502Z20206085);Opening Project of PCOSS,Xiamen University(201907);the Strategic Priority Research Program of the Chinese Academy of Sciences(XDB20000000);the Key Program of Frontier Science,CAS(QYZDJ-SSW-SLH033);the Xiamen Science and Technology Program Project(3502Z20203085);the grant from FJIRSM(CXZX-2017-T04)。

摘　　要：In this report,a series of self-organized TiO_(2)nanotube arrays were prepared by anodization of titanium foil in mixed electrolytes composed of water,ethylene glycol,and NH_(4)F.Their photoelectrochemical(PEC)performance as a photoanode was characterized by the PEC water-splitting hydrogen(H_(2))generation reaction.The internal relationship between the TiO_(2)nanotube arrays(TNTAs)morphology and their PECperformance was thoroughly investigated.Our results show that when the etching time is 10 hours,the length of the as-prepared TNTAs is about 20.78μm and the measured photocurrent density is around 1.25 m A·cm^(-2)with applied bias voltage 0.6 V(vs.Ag/Ag Cl)under simulated sunlight irradiation,which is 976 times higher than that of the TiO_(2)substrate without nanotubes architecture(0.00128 m A×cm^(-2)).More interestingly,the results of the IPCEmeasurement show that the band-gap of the as-prepared TNTAs is reduced from 3.20 to 2.83 eV.The corresponding optical response limit is also extended from 400 nm to TiO_(2)nanotube arrays is 510 nm,which indicates that the increasement of the TNTAs PEC performance benefits from the great improvement of its utilization of both the UVand visible light irradiation.

关 键 词：PHOTOELECTROCHEMISTRY WATER-SPLITTING TiO_(2)nanotube arrays H_(2) 

分 类 号：TB3[一般工业技术—材料科学与工程]