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首页> 外文期刊>Optical Materials >Thermal decomposition in-situ preparation of gray rutile TiO_(2-x)/Al_2O_3 composite and its enhanced visible-light-driven photocatalytic properties
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Thermal decomposition in-situ preparation of gray rutile TiO_(2-x)/Al_2O_3 composite and its enhanced visible-light-driven photocatalytic properties

机译：原位分解原位制备灰色金红石TiO_（2-x）/ Al_2O_3复合材料及其增强的可见光触发光催化性能

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摘要

A gray TiO2-x/Al2O3 hetero-structure photocatalyst with enhanced visible-light-driven photocatalytic properties was firstly in-situ prepared by the thermal decomposition of Al2TiO5 from a facile embedded sintering technique. The photocatalysts were characterized by X-ray diffraction, N-2 adsorption-desorption, field emission scanning electron microscopy, UV-vis diffuse reflectance spectra and electron spin resonance (ESR) tests. Compared with reduced TiO2 (TiO2-x), the gray TiO2-x/Al2O3 samples with different molar ratios displayed higher photocatalytic activity in methylene blue (MB) decomposition under visible light irradiation. The first-order rate constant of K = 0.0104min(-1) for the gray TiO2-x/Al2O3 sample with 1:1 M ratio is about 2.42 times greater than that of dark blue TiO2-x. The excellent photocatalytic performance of TiO2-x/Al2O3 was attributed to Ti-O-Al heterojunction and appropriate bulk Ti3+ ions. Notably, the degradation rate of TiO2-x/Al2O3 sample with 1:1 M ratio for MB decomposition reached 86.74% within 180 min under visible light illumination and still remained 80.1% after three cycles, which shows a good application potential in water treatment.
机译：通过从容纳嵌入式烧结技术的热分解制备具有增强的可见光催化性质的灰色TiO2-X / Al2O3杂结构光催化剂首先原位原位。通过X射线衍射，N-2吸附 - 解吸，场发射扫描电子显微镜，UV-Vis弥射反射谱和电子自旋共振（ESR）试验表征光催化剂。与减少的TiO 2（TiO 2-x）相比，具有不同摩尔比的灰色TiO2-X / Al2O3样品在可见光照射下在亚甲基蓝（MB）分解中显示出更高的光催化活性。 k = 0.0104min（-1）的一阶速率常数用于1：1 m的灰色TiO2-x / Al2O3样品的样品比深蓝色TiO2-x大约2.42倍。 TiO2-X / Al2O3的优异的光催化性能归因于Ti-O-Al异质结和适当的体Ti3 +离子。值得注意的是，在可见光照射下，MB分解的1：1M比的TiO2-X / Al2O3样品的降解速率在180分钟内达到86.74％，三个循环后仍保持80.1％，其在水处理中显示出良好的应用潜力。

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  • 来源
    《Optical Materials》 |2021年第1期|110716.1-110716.8|共8页
  • 作者

    Tan Ling; Dong Weixia; Liu Kun; Luo Ting; Gu Xingyong;

  • 作者单位

    Jingdezhen Ceram Inst Sch Mat Sci & Engn Jingdezhen 333403 Peoples R China;

    Jingdezhen Ceram Inst Sch Mat Sci & Engn Jingdezhen 333403 Peoples R China;

    Jingdezhen Ceram Inst Sch Mat Sci & Engn Jingdezhen 333403 Peoples R China;

    Jingdezhen Ceram Inst Sch Mat Sci & Engn Jingdezhen 333403 Peoples R China;

    Jingdezhen Ceram Inst Sch Mat Sci & Engn Jingdezhen 333403 Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Photocatalyst; TiO2-x/Al2O3 composite; Catalytic properties; Heterojunction; In-situ thermal decomposition;

    机译：光催化剂;TiO2-x / Al2O3复合材料;催化性质;异质结;原位热分解;

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