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首页> 外文期刊>RSC Advances >Increasing the surface area of TiO2 nanotube membranes by filling the channels with onion type carbon materials and TiCl4 for dye-sensitized solar cells
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Increasing the surface area of TiO2 nanotube membranes by filling the channels with onion type carbon materials and TiCl4 for dye-sensitized solar cells

机译：通过用洋葱型碳材料和TiCl4填充染料敏化太阳能电池来增加TiO2纳米管膜的表面积

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摘要

We have significantly enhanced the power conversion efficiency of dye-sensitized solar cells based on TiO2 nanotube membranes by increasing the inner surface area of the channels. Onion type carbon materials (OTCMs) were produced by injecting ethylene gas continuously into the Ar plasma of a thermal plasma system. The average size was about 20 nm. OTCMs were functionalized by treatment with sulfuric and nitric acids. Functionalized OTCMs were chemisorbed on the inner surface of the channels by spontaneous diffusion. To maximize filling, we vacuum-filled functionalized OTCMs and TiCl4 into the channels of TiO2 nanotube membranes in sequence, and then sintered at 500 degrees C. When being sintered, TiCl4 transformed to TiO2, while the carbon materials burnt. By filling OTCMs and TiCl4 in sequence and sintering, the inner surface became very rough, and the amount of dye adsorbed on the photoanode was increased about 50%. The electron lifetime and effective carrier diffusion length were increased by filling with functionalized OTCMs and TiCl4 in sequence. The power conversion efficiency of the DSSC based on TiO2 nanotube membranes was improved from 6.99 to 9.33%, a 33.5% enhancement. The efficiency enhancement is mainly due to an increase in the total available surface area for dye adsorption.
机译：通过增加通道的内表面区域，基于TiO2纳米管膜显着提高了染料敏化太阳能电池的功率转换效率。通过将乙烯气体连续注入热等离子体系统的AR血浆来制备洋葱型碳材料（OTCMS）。平均尺寸约为20nm。通过用硫酸和硝酸处理官能化耳菌。通过自发的扩散在通道的内表面上化学官能化OTCMS。最大化填充物，我们依次将填充的官能化耳杆和TiCl4吸收到TiO2纳米管膜的通道中，然后在500℃下烧结。当烧结时，TiCl4转化为TiO 2，而碳材料燃烧。通过序列和烧结填充OTCM和TiCl4，内表面变得非常粗糙，吸附在光电沸秒上的染料量增加约50％。通过依次用官能化的OTCM和TiCl4填充填充官能化的OTCMS和TiCl4，增加了电子寿命和有效载体扩散长度。基于TiO2纳米管膜的DSSC的功率转换效率从6.99增加到9.33％，增强33.5％。效率增强主要是由于染料吸附的总可用表面积的增加。

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  • 来源
    《RSC Advances》 |2015年第90期|共8页
  • 作者

    Kim Ho-sub; Suh Jung Sang;

  • 作者单位

    Seoul Natl Univ Dept Chem Nanomat Lab Seoul 151742 South Korea;

    Seoul Natl Univ Dept Chem Nanomat Lab Seoul 151742 South Korea;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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