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Creation of super high performance photocatalyst by control of nanomicrostructure of titanium oxide

Creation of super high performance photocatalyst by control of nanomicrostructure of titanium oxide
通过控制氧化钛纳米微结构创造超高性能光催化剂
批准号:
18550183
负责人:
HASEGAWA Akira
金额:
$2.62万
依托单位国家:
日本
项目类别:
Grant-in-Aid for Scientific Research (C)
财政年份:
2006
资助国家:
日本
项目状态:
已结题
起止时间:
2006 至 2007

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中文摘要
翻译
以四异丙醇钛(TTIP)为原料,采用溶胶-凝胶法制备了不同种类的TiO_2。我们成功地以1,3-丁二醇为原料合成了高结晶度的前驱体Ti(OCH(CH_3)CH_2CH_2O)_2,以乙二醇为原料合成了高结晶度的前驱体Ti(OCH_2CH_2O)_2。其中,1,3-丁二醇烷氧基二醇钛在346 ℃时发生了剧烈的分解,转化为具有方棒骨架的TiO_2相。前驱体在空气中500 ℃煅烧,可容易地合成出长1.5 μ m、宽0.3 μ m的四方棒状TiO_2。四方棒状TiO_2的骨架是由直径为25 nm的细小TiO_2颗粒构成的。EXAFS和XPS分析揭示了5-配位的存在。在光催化氧化乙醛的反应中,获得了与P25相当的光催化活性。这种活性是由于TiO_2颗粒中氧缺陷的高度分布,它们是构成方棒骨架的组成部分。此外,氧缺陷有效地作为光氧化位点通过捕获由UV照射产生的空穴。结果表明,氧缺陷和方棒状结构是光氧化活性产生的必要条件
英文摘要
Various TiO_2 were prepared by sol-gel process using titanium tetraisopropoxide (TTIP) and different dilos. We prepared successfully the highly ctystalline precursors, Ti (OCH (CH_3)CH_2CH_2O)_2 from 1, 3-butanediol and Ti (OCH_2CH_20)_2 from ethylene glycol. In particular, the titanium alkoxy-diolate from 1, 3-butanediol was drastically decomposed at 346℃ and transformed to TiO_2 phase with the square rod framework. The square rod TiO_2, whose typical size was estimated to be 1.5μm long and 0.3μm in width, was easily synthesized by the calcination of precursors at 500℃ in air. The framework of square rod TiO_2 was constructed from fine TiO_2 particles with 25 nm in diameter. EXAFS and XPS analyses revealed the presence of 5-coodinated. Ti species and oxygen defects.The photocatalytic activities as high as P25 was achieved during the photo-oxidation of acetaldehyde. The activity was due to the high distribution of oxygen defects of TiO_2 particles, which were components of the construction of the square rod framework. In addition, the oxygen defect acted effectively as a photo-oxidation site by the capture of hole generated by UV irradiation. It concluded that both oxygen defect and square rod shape were essential for the generation of the photo-oxidation activity
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Study on mechanism of grain boundary embrittlement of austenitic stainless steel after irradiation using in-situ monitoring system of grain boundary separation
  • 批准号:
    24656563
  • 项目类别:
    Grant-in-Aid for Challenging Exploratory Research
  • 资助金额:
    $2.58万
  • 财政年份:
    2012
  • 负责人:
    HASEGAWA Akira
  • 依托单位:
Influence of abnormal body temperature on expression of mucin in the respiratory tract under the artificial respiration Hyperthermia vs hypothermia-
  • 批准号:
    19791072
  • 项目类别:
    Grant-in-Aid for Young Scientists (B)
  • 资助金额:
    $2.38万
  • 财政年份:
    2007
  • 负责人:
    HASEGAWA Akira
  • 依托单位:
Improvement of Validation Technique for Long Term Soundness of In-core Component Materials of Light Water Reactor Plant after Repair and Maintenance
  • 批准号:
    17360451
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
  • 资助金额:
    $10.43万
  • 财政年份:
    2005
  • 负责人:
    HASEGAWA Akira
  • 依托单位:
Mapping of asperities and estimation of spatiotemporal distribution of interplate slip
  • 批准号:
    15204037
  • 项目类别:
    Grant-in-Aid for Scientific Research (A)
  • 资助金额:
    $26.21万
  • 财政年份:
    2003
  • 负责人:
    HASEGAWA Akira
  • 依托单位:
国内基金
海外基金
CNTs/ La^3+掺杂TiO_2纳米纤维的制备及对重金属去除机理研究
  • 批准号:
    51403106
  • 项目类别:
    青年科学基金项目
  • 资助金额:
    20.0万元
  • 批准年份:
    2014
  • 负责人:
    王芳芳
  • 依托单位:
吸附—光催化双功能活性炭吸附材料的C/TiO_2协同作用机制
  • 批准号:
    30400339
  • 项目类别:
    青年科学基金项目
  • 资助金额:
    23.0万元
  • 批准年份:
    2004
  • 负责人:
    刘守新
  • 依托单位: