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TiO2/Bi2S3 core-shell nanowire arrays for photoelectrochemical hydrogen generation

机译:TiO2 / Bi2S3用于光电化学氢气的核 - 壳纳米线阵列

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摘要

A facile and effective procedure for the synthesis of quasi-vertically aligned TiO2/Bi2S3 core-shell nanowire arrays (NWAs) is reported. The nontoxic and earth abundant Bi2S3 was assembled onto the hydrothermal pre-grown TiO2 NWAs via a successive ionic layer adsorption and reaction (SILAR) method. The morphologies, microstructures, and optical properties of the pristine TiO2 and composite TiO2/Bi2S3 with different SILAR circles were characterized in detail. For photoelectrochemical (PEC) measurements, the TiO2/ Bi2S3 core-shell NWAs exhibited not only an enhanced photocurrent density (2.8 times higher than that of pristine TiO2), but also a negatively shifted onset potential from 0.067 to -0.072 V vs. RHE, as compared to the TiO2. This better PEC performance results from the broadened light absorption and the improved charge carrier separation efficiency. Our results provide a green photoelectrode for PEC hydrogen generation.
机译:报道了用于合成准垂直对齐的TiO2 / BI2S3核 - 壳纳米线阵列(NWAs)的容易和有效的方法。 通过连续的离子层吸附和反应(Sill)方法,将无毒和地球丰富的Bi2S3组装到水热预生长的TiO2 NWA上。 详细表征了具有不同Sill圈子的原始TiO2和复合TiO2 / Bi2S3的形态,微观结构和光学性质。 对于光电化学(PEC)测量,TiO2 / Bi2S3核心壳NWA不仅具有增强的光电流密度(比原始TiO 2高2.8倍),而且还为0.067至-0.072 V与rhe的负面偏移发病潜力。 与TiO2相比。 这种更好的PEC性能来自扩大的光吸收和改善的电荷载流子分离效率。 我们的结果为PEC氢产生提供了一种绿色光电极。

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  • 来源
    《RSC Advances》 |2015年第18期|共6页
  • 作者单位

    Xiangtan Univ Sch Phys &

    Optoelect Hunan Key Lab Micronano Energy Mat &

    Devices Xiangtan 411105 Hunan Peoples R China;

    Xiangtan Univ Sch Phys &

    Optoelect Hunan Key Lab Micronano Energy Mat &

    Devices Xiangtan 411105 Hunan Peoples R China;

    Xiangtan Univ Sch Phys &

    Optoelect Hunan Key Lab Micronano Energy Mat &

    Devices Xiangtan 411105 Hunan Peoples R China;

    Xiangtan Univ Sch Phys &

    Optoelect Hunan Key Lab Micronano Energy Mat &

    Devices Xiangtan 411105 Hunan Peoples R China;

    Xiangtan Univ Sch Phys &

    Optoelect Hunan Key Lab Micronano Energy Mat &

    Devices Xiangtan 411105 Hunan Peoples R China;

    Xiangtan Univ Sch Phys &

    Optoelect Hunan Key Lab Micronano Energy Mat &

    Devices Xiangtan 411105 Hunan Peoples R China;

    Xiangtan Univ Sch Phys &

    Optoelect Hunan Key Lab Micronano Energy Mat &

    Devices Xiangtan 411105 Hunan Peoples R China;

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

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