• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Materials Research >Effect of transition metal ion doping on photocatalytic properties of In-Ti oxides
【24h】

Effect of transition metal ion doping on photocatalytic properties of In-Ti oxides

机译：过渡金属离子掺杂对In-Ti氧化物光催化性能的影响

获取原文
获取原文并翻译 | 示例
       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Nominal compositions of In_2Ti_(1-x)Tm_xO_(5-δ), (0.0 ≤ x ≤ 0.2 and Tm = Fe~(3+) and Cr~(3+)) were synthesized by ceramic route and characterized by relevant techniques. In_2Ti_(1-x)Fe_xO_(5-δ) samples were single phased isomorphic with In_2TiO_5 phase while Cr substitution has resulted in mixed phased compositions. Dynamic light scattering experiments showed the increase in proportion of smaller sized particles with the increase in extent of Fe substitution. Mossbauer spectra revealed that Fe exists in +3 oxidation state in substituted oxides. The band gap decreased from 3.2 (In_2TiO_5) to 2.1 eV (In_2Ti_(0.8)Fe_(0.2)O_(x-δ)) and to 1.9 eV in case of Cr substitution (In_2Ti_(0.8)Cr_(0.2)O_(5-δ)) attributed to participation of Fe 3d/Cr 3d levels. Photocatalytic H_2 generation was evaluated over the substituted oxides from water-methanol mixtures under UV-visible irradiation. The decreasing order of photocatalytic activity is as follows: 20% Fe (mol%) ＞ 10% Fe ＞ indium titanate ≈ 20% Cr ＞ 10% Cr. The loading of Pt as cocatalyst on surface of most active photocatalyst, In_2Ti_(0.8)Fe_(0.2)O_(x-δ) further enhanced the photocatlytic H_2 yield.
机译：通过陶瓷法合成了In_2Ti_（1-x）Tm_xO_（5-δ）（0.0≤x≤0.2和Tm = Fe〜（3+）和Cr〜（3+））的标称组成，并通过相关技术对其进行了表征。 In_2Ti_（1-x）Fe_xO_（5-δ）样品是具有In_2TiO_5相的单相同晶，而Cr取代导致混合相组成。动态光散射实验表明，随着铁替代程度的增加，较小尺寸的颗粒所占的比例也增加。 Mossbauer光谱表明，Fe以+3氧化态存在于取代的氧化物中。带隙从3.2（In_2TiO_5）降低到2.1 eV（In_2Ti_（0.8）Fe_（0.2）O_（x-δ）），在Cr取代的情况下（In_2Ti_（0.8）Cr_（0.2）O_（5- δ））归因于Fe 3d / Cr 3d水平的参与。在紫外可见光照射下，评估了水-甲醇混合物中取代氧化物对光催化H_2生成的影响。光催化活性的降序如下：20％Fe（摩尔％）＞ 10％Fe＞钛酸铟≈20％Cr＞ 10％Cr。在大多数活性光催化剂In_2Ti_（0.8）Fe_（0.2）O_（x-δ）的表面上负载Pt作为助催化剂进一步提高了光催化H_2的产率。

著录项

  • 来源
    《Journal of Materials Research》 |2015年第21期|3259-3266|共8页
  • 作者

    Mrinal Rajesh Pai; Atindra Mohan Banerjee; Shymala Rajkumar Bharadwaj;

  • 作者单位

    Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India;

    Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India;

    Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India;

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

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号