Key Laboratory of Functional Inorganic Material Chemistry (MOE), School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, PR China.
Key Laboratory of Functional Inorganic Material Chemistry (MOE), School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, PR China.
J Colloid Interface Sci. 2018 Nov 15;530:624-630. doi: 10.1016/j.jcis.2018.07.016. Epub 2018 Jul 6.
New insight of introducing new organic compounds for the efficient photogenerated charge separation is vitally important for the current solar energy conversion. Herein, (2Z,2'Z)-4,4'-(anthracene-2,6-diylbis(azanediyl))bis(4-oxobut-2-enoic acid) (ADA)/TiO composite thin film is fabricated through the wet-impregnation strategy, which exhibits excellent photoelectrochemical performance (PEC). A combined study of ultraviolet-visible absorption spectra, scanning Kelvin probe maps, electrochemical and photoelectrochemical measurements reveals that the ADA/TiO composite with narrow bandgap of 2.42 eV extends the photo response to the visible light region. The photocurrent generated by the optimal ADA/TiO is 2.5 times higher than that of the pristine TiO. The result is attributed to the broader light absorption range and the separation of photoelectrons and holes prompted by ADA. Moreover, the high stability of the ADA/TiO composite favors the practical application. The present work may offer a promising strategy for the low-cost PEC cell in the clean solar hydrogen production.
引入新的有机化合物以实现高效光生电荷分离的新见解对于当前的太阳能转换至关重要。在此，通过湿浸渍策略制备了（2Z，2'Z）-4,4' -（蒽-2,6-二基双（氮杂二基））双（4-氧代丁-2-烯酸）（ADA）/TiO 复合薄膜，表现出优异的光电化学性能（PEC）。紫外-可见吸收光谱、扫描开尔文探针图、电化学和光电化学测量的综合研究表明，带隙为 2.42eV 的 ADA/TiO 复合窄带隙将光响应扩展到可见光区域。最佳 ADA/TiO 产生的光电流比原始 TiO 高 2.5 倍。这一结果归因于 ADA 引起的更宽的光吸收范围和光生电子和空穴的分离。此外，ADA/TiO 复合的高稳定性有利于实际应用。本工作可为清洁太阳能制氢的低成本 PEC 电池提供一种有前途的策略。
