Baran Tomasz, Wojtyła Szymon, Dibenedetto Angela, Aresta Michele, Macyk Wojciech
Faculty of Chemistry, Jagiellonian University, Ingardena 3, 30-060, Kraków, Poland.
Department of Chemistry, University of Bari, Orabona, 4, 70125, Bari, Italy.
ChemSusChem. 2016 Oct 20;9(20):2933-2938. doi: 10.1002/cssc.201600289. Epub 2016 Jul 26.
A p-type semiconductor, CuI, has been synthesized, characterized, and tested as a photocatalyst for CO reduction under UV/Vis irradiation in presence of isopropanol as a hole scavenger. Formation of CO, CH , and/or HCOOH was observed. The photocatalytic activity of CuI was attributed to the very low potential of the conduction band edge (i.e., -2.28 V vs. NHE). Photocurrents generated by the studied material confirm a high efficiency of the photoinduced interfacial electrontransfer processes. Our studies show that p-type semiconductors may be effective photocatalysts for CO reduction, even better than extensively studied n-type titanium dioxide, owing to the low potential of the conduction band edge.
一种p型半导体CuI已被合成、表征，并在异丙醇作为空穴清除剂存在的情况下，于紫外/可见光照射下作为光催化剂用于CO还原测试。观察到了CO、CH和/或HCOOH的生成。CuI的光催化活性归因于其导带边缘的极低电位（即相对于标准氢电极-2.28 V）。所研究材料产生的光电流证实了光诱导界面电子转移过程的高效率。我们的研究表明，由于导带边缘电位较低，p型半导体可能是用于CO还原的有效光催化剂，甚至比广泛研究的n型二氧化钛还要好。
