College of Chemistry, Fuzhou University, Fuzhou 350002, PR China.
School of Physics, University of Electronic Science and Technology of China, Chengdu 610054, PR China.
J Colloid Interface Sci. 2019 Oct 15;554:627-639. doi: 10.1016/j.jcis.2019.07.048. Epub 2019 Jul 18.
The intertwined exploring of solar water driven into chemical energy configurated by a constituted semiconductor photocatalyst under sunlight approach toward a remediation eager method that solve the environmental issues. Currently we optimized polymeric carbon nitride PCN by a sophisticated molecular co-polymerization process which diffused with a mirror organic conjugated heterocyclic monomer to maximize its photocatalytic activity. Herein, for the 1st time we report an organic π-electron stacking conjugated thiazolothiazole (TT) as a small molecule within the framework of PCN to enhance the conductive optical and photocatalytic properties of PCN under solar energy irradiation. The fusion of this bicyclic thiazolothiazole (TT) co-monomer within PCN remarkably enhanced the charge carrier motilities and giving a rigid packing due to sulfur contents. Excitingly the as-synthesized samples were processed under different liberated characterization such as XRD, FTIR, BET, SEM, TEM, XPS, PL, DRS and EPR under both regions respectively. Results reflect that the integration of thiazolothiazole (TT) in the heptazine structure of PCN alter a prodigious delocalization in its π-conjugated system and similarly demonstrating an apparent fluctuation in its surface area, electronic structure, its calculated band gap, chemical composition analysis and maximize the process of generation of electrons under solar light from ground state (HOMO) to the excited state (LUMO) of polymeric carbon nitride (PCN). Beside, this unique integrity of TT co-monomer with in PCN matrix remarkably improve the photocatalytic activity toward prosperity and the amount optimized CNU-TT demonstrated an outstanding photocatalytic activity of water reduction for H evolution and as well of RhB pollutant photodegradation. The sample optimized display 10.6 enhancement comparatively pure pristine sample.
在阳光的作用下，将太阳能转化为化学能的半导体光催化剂的探索，为解决环境问题提供了一种修复的方法。目前，我们通过复杂的分子共聚过程对聚合碳氮化物（PCN）进行了优化，该过程中扩散了具有镜像有机共轭杂环单体以最大程度地提高其光催化活性。在这里，我们首次报道了一种有机π-电子堆积共轭噻唑并噻唑（TT）作为小分子，以在太阳能照射下增强 PCN 的导电光学和光催化性能。这种双环噻唑并噻唑（TT）共单体与 PCN 的融合显著提高了载流子迁移率，并由于硫含量而赋予了刚性的堆积。令人兴奋的是，在不同的自由特性下对合成的样品进行了处理，例如分别在两个区域下进行 XRD、FTIR、BET、SEM、TEM、XPS、PL、DRS 和 EPR 等的处理。结果表明，噻唑并噻唑（TT）在 PCN 的六嗪结构中的集成改变了其π-共轭体系中的巨大离域化，同样在其表面积、电子结构、计算能带隙、化学成分分析方面也表现出明显的波动，并最大程度地在从基态（HOMO）到激发态（LUMO）的过程中生成电子在聚合碳氮化物（PCN）下的太阳能。此外，TT 共聚单体与 PCN 基质的这种独特的完整性显著提高了对繁荣的光催化活性，并且优化的 CNU-TT 展示了对水还原析氢和 RhB 污染物光降解的优异光催化活性。优化后的样品显示出与纯原始样品相比提高了 10.6 倍。
