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首页> 外文期刊>Environmental Science & Technology >Novel Functionality of Organic 6,13-Pentacenequinone as a Photocatalyst for Hydrogen Production under Solar Light
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Novel Functionality of Organic 6,13-Pentacenequinone as a Photocatalyst for Hydrogen Production under Solar Light

机译：有机6,13-​​并五苯醌作为光催化剂在太阳光下制氢的新功能

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摘要

6,13-Pentacenequinone (PQ), an intermediate for an organic semiconductor pentacene, was synthesized by single step solvent free solid state reaction at room temperature under ambient conditions which is hitherto unattempted. The phase purity has been confirmed by XRD and NMR. Optical study showed the absorption at 390 and 412 nm attributed to the π-π~* and n-π~* transitions, respectively. Cyclic voltammetry indicates the semiconducting nature of PQ. having a band gap of 3 eV. The photoluminescence study revealed emissions at 408 and 432 run. Considering the good thermal stability and absorption well within visible region, wisely, PQ. has been used as a photocatalyst for the hydrogen production under solar light. Surprisingly we observed the utmost hydrogen evolution i.e. 4848 μmol/h/0.1 g (quantum efficiency 6.8％). The repeatability and reusability study confirmed the stability of the photocatalyst. The confirmation of the photocatalytic effect was also confirmed using methylene blue (MB) dye degradation under natural sunlight The observed rate constant (K_(app)) for photocatalytic MB degradation was 1.60 × 10~(-2) min~(-1). The use of an organic photocatalyst for hydrogen production has been demonstrated for the first time. This novel organic photocatalyst can also be explored for water splitting.
机译：6,13-​​并五苯醌（PQ），一种有机半导体并五苯的中间体，是在室温下于环境条件下通过单步无溶剂固相反应合成的，这是迄今为止从未尝试过的。相纯度已经通过XRD和NMR确认。光学研究表明，在390和412 nm处的吸收分别归因于π-π〜*和n-π〜*跃迁。循环伏安法表明PQ的半导体性质。带隙为3 eV。光致发光研究表明在408和432运行时有发射。考虑到良好的热稳定性和可见光区域内的吸收能力，明智地使用PQ。已被用作光催化剂在太阳光下生产氢气。出乎意料的是，我们观察到最大的氢气释放量，即4848μmol/ h / 0.1 g（量子效率6.8％）。可重复性和可重复使用性研究证实了光催化剂的稳定性。使用亚甲基蓝（MB）染料在自然阳光下的降解也证实了光催化效果。观察到的光催化MB降解速率常数（K_（app））为1.60×10〜（-2）min〜（-1）。首次证明了将有机光催化剂用于制氢。这种新型的有机光催化剂也可以用于水分解。

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  • 来源
    《Environmental Science & Technology》 |2014年第7期|4178-4183|共6页
  • 作者

    Vikram U. Pandit; Sudhir S. Arbuj; Uttam P. Mulik; Bharat B. Kale;

  • 作者单位

    Centre for Materials for Electronics Technology (C-MET), Department of Electronics and Information Technology (DeitY), Government of India, Panchavati, Off Pashan Road, Pune-411008, India;

    Centre for Materials for Electronics Technology (C-MET), Department of Electronics and Information Technology (DeitY), Government of India, Panchavati, Off Pashan Road, Pune-411008, India;

    Centre for Materials for Electronics Technology (C-MET), Department of Electronics and Information Technology (DeitY), Government of India, Panchavati, Off Pashan Road, Pune-411008, India;

    Centre for Materials for Electronics Technology (C-MET), Department of Electronics and Information Technology (DeitY), Government of India, Panchavati, Off Pashan Road, Pune-411008, India;

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