引用本文:许美贤,刘佳孟,李文奕,孙研豪,张王刚,王红霞.Au负载N掺杂TiO2纳米管阵列的制备及其性能[J].中国表面工程,2020,33(1):84~90
XU Meixian,LIU Jiameng,LI Wenyi,SUN Yanhao,ZHANG Wanggang,WANG Hongxia.Preparation and Properties of Au-supported N-doped TiO2 Nanotube Arrays[J].China Surface Engineering,2020,33(1):84~90
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Au负载N掺杂TiO2纳米管阵列的制备及其性能
许美贤1, 刘佳孟1, 李文奕1, 孙研豪1, 张王刚1, 王红霞1,2
1.太原理工大学 材料科学与工程学院, 太原 030024;2.太原理工大学 新材料界面科学与工程教育部重点实验室,太原 030024
摘要:
TiO2 纳米管阵列较大的禁带宽度是导致其光催化效率较低的重要原因,采用磁控溅射、阳极氧化以及气氛退火相结合的方法对 TNAs 改性后制备了 Au 负载 N 掺杂 TiO2 纳米管阵列(Au@ N-TNAs),然后以甲基橙为目标污染物, 进一步分析了 Au@ N-TNAs 在不同 Au 负载量时光降解效率的变化情况。 采用 SEM、XRD、TEM 和 X 射线光电子能谱 (XPS)等对 Au 和 N 在 Au@ N-TNAs 中的存在形式进行表征和分析,发现 Au 主要是负载在 TiO2 纳米管阵列上,而 N 元素则是以掺杂的方式进入 TiO2 纳米管阵列的晶格中。 此外,在光降解试验中发现通过 Au 负载与 N 掺杂相结合的方法对 TiO2 纳米管阵列进行复合改性后,TiO2 纳米管阵列的光催化效率得到显著提升,其中 20s-Au@ N-TNAs 具有最佳的光降解效率。 但 Ti-N 薄膜中间的 Au 层太厚时会影响阳极氧化过程中 TiO2 纳米管阵列的生长,而且过量的 Au 在退火处理时很难及时地扩散均匀,进而使得改性后的 TiO2 纳米管阵列(40s-Au@ N-TNAs)的光催化效率明显降低。
关键词:  磁控溅射  阳极氧化  Au 负载  N 掺杂  TiO2 纳米管阵列  光催化
DOI：10.11933/j.issn.1007-9289.20191010002
分类号:TG174.44
文章编号:1007-9289(2020)01-0084-07
文献标识码:A
基金项目:国家自然科学基金(U1810208)； 山西省自然科学基金(201701D121045)
Preparation and Properties of Au-supported N-doped TiO2 Nanotube Arrays
XU Meixian1, LIU Jiameng1, LI Wenyi1, SUN Yanhao1, ZHANG Wanggang1, WANG Hongxia1,2
1.College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024 , China;2.Key Laboratoryof Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan 030024 , China
Abstract:
The low photocatalytic efficiency of TiO2 nanotube arrays is mainly due to its large band gap, in this paper, Au-supported N-doped TiO2 nanotube arrays (Au@ N-TNAs) were prepared by modifying TNAs by a combination of magnetron sputtering, anodizing, and atmospheric annealing, then methyl orange was used as the target pollutant to analyse the photodegradation efficiency of Au@ N-TNAs under different Au loading. SEM, XRD, TEM, and X-ray photoelectron spectroscopy (XPS) were used to characterize the existence of Au and N in Au@ N-TNAs. According to the analysis, Au was mainly supported on TiO2 nanotubes arrays, and N was doped into the lattice of TiO2 nanotubes arrays. In addition, it was found that the composite modification of the TiO2 nanotube arrays by a combination of Au loading and N doping in this photodegradation experiment, then the photocatalytic efficiency of the modified TiO2 nanotube arrays were significantly improved, and 20s-Au@ N-TNAs had the best photodegradation efficiency. However, when the Au layer in the middle of the Ti-N thin film was too thick, it would affect the growth of TiO2 nanotubes arrays during anodization, and the excessive Au was difficult to diffuse uniformly in time during the annealing treatment, there-by making the photocatalytic efficiency of the modified TiO2 nanotube arrays (40s-Au@ N-TNAs) were significantly reduced.
Key words:  magnetron sputtering  anodization  Au loading  N-doped  TiO2 nanotube array  photocatalysis
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