有机6,13-并五苯醌作为光催化剂在太阳光下产生氢的新颖功能。,Environmental Science & Technology

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有机6,13-并五苯醌作为光催化剂在太阳光下产生氢的新颖功能。
Environmental Science & Technology ( IF 10.8 ) Pub Date : 2014 Apr 1 , DOI: 10.1021/es405150p
Vikram U. Pandit ₁ , Sudhir S. Arbuj ₁ , Uttam P. Mulik ₁ , Bharat B. Kale ₁

Affiliation

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pi-pi *和n-pi *跃迁。循环伏安法表明带隙为3 eV的PQ的半导体性质。光致发光研究表明在408和432 nm处有发射。考虑到良好的热稳定性和在可见光区域内的良好吸收，明智地将PQ用作在太阳光下制氢的光催化剂。出乎意料的是，我们观察到最大的氢气释放量，即4848 mumol / 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对光催化作用的确认。观察到的光催化MB降解速率常数（Kapp）为1.60 x 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。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。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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Novel functionality of organic 6,13-Pentacenequinone as a photocatalyst for hydrogen production under solar light.

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 pi-pi* and n-pi* 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 nm. 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 mumol/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 (Kapp) for photocatalytic MB degradation was 1.60 x 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.

更新日期：2017-01-31

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