辽宁石油化工大学学报

辽宁石油化工大学学报 ›› 2022, Vol. 42 ›› Issue (3): 37-41.DOI: 10.3969/j.issn.1672-6952.2022.03.007

• 材料科学与新能源 • 上一篇    下一篇

TiO2同质体材料的拓扑转变合成及其性能的研究

陈常东(), 李哲, 李珂, 丛金莹, 杨宇航, 王芳芳   

  1. 辽宁石油化工大学 石油化工学院,辽宁 抚顺 113001
  • 收稿日期:2021-09-02 修回日期:2022-03-18 出版日期:2022-06-25 发布日期:2022-07-18
  • 作者简介:陈常东(1984⁃),男,博士,讲师,从事层状化合物及纳米金属氧化物的设计与制备、晶面工程学、光(电)催化材料等方面研究;E⁃mail:chencd1984@gmail.com
  • 基金资助:
    教育部“春晖计划”合作科研项目(2020703?8);国家留学基金委公派访学学者面上项目(CSC202008210025);辽宁省教育厅科学技术研究项目(L2019036);辽宁石油化工大学科研启动基金项目(2016xJJ?075);辽宁石油化工大学创新创业训练计划项目(201910148145)

Topological Transition Synthesis and Properties of TiO2 Homogeneous Materials

Changdong Chen(), Zhe Li, Ke Li, Jinying Cong, Yuhang Yang, Fangfang Wang   

  1. School of Petrochemical Engineering,Liaoning Petrochemical University,Fushun Liaoning 113001,China
  • Received:2021-09-02 Revised:2022-03-18 Online:2022-06-25 Published:2022-07-18

摘要:

采用H4x/3Ti2-x/3x/3O4·nH2O(HTO)为前驱体原料,通过水浴浸渍的方式在HTO的表面负载纳米级氧化钛颗粒(ST01),采用焙烧的方法拓扑合成TiO2同质结构复合材料。利用X射线衍射(XRD)、拉曼光谱(Raman)等测试手段,详细研究了焙烧温度对TiO2相变过程的影响。结果表明,HTO随着温度的升高逐渐由单斜结构的TiO2(B)转变成锐钛矿结构,再转变至金红石结构,且形成多种不同结构、组成的TiO2同质复合体材料。以罗丹明B(RhB)为污染物模型进行降解实验,600 ℃时样品的光催化活性明显高于其他样品,主要是由于此时样品的电子与空穴分离效率较高,说明同质复合体TiO2结构和组成影响了其光催化活性。此外,染料敏化太阳能电池(DSSCs)实验表明,600 ℃时样品的光电性能较高,其原因是二维片状形貌有助于光生载流子的快速迁移。

关键词: TiO2, 同质结构, 拓扑相变, 光(电)催化

Abstract:

In this work, the HTO (H4x/3Ti2-x/3x/3O4·nH2O) was used as the precursor raw material, and the nanoscale titanium oxide particles (ST01) were loaded on the surface of the HTO by water bath impregnation, and the TiO2 homogeneous structure composite was topologically synthesized by calcination method. Using X?ray diffraction (XRD), Raman spectroscopy (Raman) and other testing methods, the effect of calcination temperature on the phase transition process with titanium dioxide was studied in detail. The results indicate that the HTO can transfer to TiO2(B), anatase TiO2 and rutile TiO2 with increased temperatures, and the TiO2 homophase composites are obtained with various structure and content of TiO2. The degradation experiment was carried out with Rhodamine B (RhB) as the pollutant model. The photocatalytic activity of the sample at 600 ℃ is significantly higher than that of other samples, mainly because the separation efficiency of electrons and holes of the sample is the highest at this time, indicating that the structure and composition of homogeneous composite TiO2 affect its photocatalytic activity. In addition, dye?sensitized solar cell (DSSCs) experiments show that the reason for the higher optoelectronic performance of the samples at 600 ℃ is that the two?dimensional sheet?like morphology facilitates the rapid migration of photogenerated carriers.

Key words: Titanium dioxide, Homogeneous structure, Topotactic phase transformation, Photocatalysis

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