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首页> 外文期刊>RSC Advances >Enhanced hydrogen production by carbon-doped TiO2 decorated with reduced graphene oxide (rGO) under visible light irradiation
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Enhanced hydrogen production by carbon-doped TiO2 decorated with reduced graphene oxide (rGO) under visible light irradiation

机译：在可见光照射下，通过碳掺杂的TiO 2通过碳掺杂TiO 2增强氢气产生

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摘要

Enhancing visible light utilization by photocatalysts, avoiding electron-hole recombination, and facilitating charge transfer are three major challenges to the success of sustainable photocatalytic systems. In our study, carbon-doped TiO2 was synthesized with decoration of reduced graphene oxide (C-TiO2/rGO) to form a hybrid nanocomposite that exhibits excellent photocatalytic activity and longevity. Morphology, chemical and colloidal stability, crystallinity, surface compositions and band structures were systematically assessed. The results revealed that the hybrid C-TiO2/rGO had a band gap of 2.2 + 0.2 eV and crystallite sizes of 0.9-2 nm in diameter. Transmission electron microcopy (TEM) images showed that C-TiO2 particles attached to the carbon sheet of rGO. Under irradiation of 135 mW cm(-2) at 400-690 nm with methanol as electron donor, C-TiO2 and C-TiO2/rGO yielded incredibly high H-2 production rates of 0.67 +/- 0.12 to 1.50 +/- 0.2 mmol g(-1) h(-1), respectively, which were greater than those of other titanium hybrid catalysts such as C-TiO2/Pt. rGO not only greatly improved the photocatalytic activity but also led to greater stability of H-2 production compared to C-TiO2. This work lays groundwork toward the design of novel visible light-driven photocatalytic systems for harnessing solar energy and environmental applications.
机译：通过光催化剂增强可见光利用，避免电子 - 空穴重组，并且促进电荷转移是可持续光催化系统成功的三大挑战。在我们的研究中，用碳掺杂的TiO 2合成，用氧化石墨烯（C-TiO 2 / Rgo）的装饰合成，形成杂交纳米复合物，其表现出优异的光催化活性和寿命。系统地评估了形态学，化学和胶体稳定性，结晶度，表面组合物和带结构。结果表明，杂化C-TiO2 / Rgo具有2.2±0.2eV的带隙，直径为0.9-2nm的微晶尺寸。透射电子显微镜（TEM）图像显示C-TiO2颗粒附着在RGO的碳板上。在400-690nm的135mM cm（-2）的辐照下，用甲醇作为电子供体，C-TiO 2和C-TiO2 / Rgo产生令人难以置信的高H-2生产率为0.67 +/- 0.12至1.50 +/- 0.2 Mmol G（-1）H（-1）分别大于其他钛杂交催化剂如C-TiO 2 / Pt的H（-1）。 RGO不仅大大改善了光催化活性，而且与C-TiO2相比，H-2生产的稳定性更大。这项工作奠定了用于利用太阳能和环境应用的新型可见光光催化系统设计的基础。

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  • 来源
    《RSC Advances》 |2016年第3期|共10页
  • 作者

    Kuang Liyuan; Zhang Wen;

  • 作者单位

    New Jersey Inst Technol John A Reif Jr Dept Civil &

    Environm Engn Newark NJ 07102 USA;

    New Jersey Inst Technol John A Reif Jr Dept Civil &

    Environm Engn Newark NJ 07102 USA;

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