Alpochoritis Georgios, Kolokithas Ntoukas Argiris, Georgakilas Vasilios I
Department of Materials Science, University of Patras, 26504 Patras, Greece.
Department of Pharmacy, School of Health Sciences, University of Patras, 26504 Patras, Greece.
Molecules. 2024 Jun 29;29(13):3115. doi: 10.3390/molecules29133115.
Hematite has been considered an important candidate for the development of an efficient photoelectrocatalytic water-splitting system. One of the most serious obstacles that limits the efficiency of hematite is low absorption capacity in visible light. Herein, we report the production of hematene nanoplatelets from hematite ore with yields of up to 60%, using a low-cost, sustainable method that is based on the ultrasonic treatment of hematite ore in a water solution of a series of organic aromatic compounds. We show that the chemisorption of molecules with increased aromaticity on the surface of hematene resulted in the significant improvement of its visible light absorptivity, with an increase of up to 200%. As a result, using a water solution of terephthalaldehyde as a liquid medium, hematite ore was exfoliated to hematene nanoplatelets with a yield of 40% and remarkable stability in water. Due to this, hematene was easily drop-casted on glass forming homogenous thin films with strong absorptivity in the visible region.
赤铁矿被认为是开发高效光电催化水分解系统的重要候选材料。限制赤铁矿效率的最严重障碍之一是其在可见光下的吸收能力较低。在此，我们报告了使用一种低成本、可持续的方法从赤铁矿矿石中制备赤铁矿纳米片，产率高达60%，该方法基于在一系列有机芳香化合物的水溶液中对赤铁矿矿石进行超声处理。我们表明，具有更高芳香性的分子在赤铁矿表面的化学吸附导致其可见光吸收率显著提高，增幅高达200%。结果，以对苯二甲醛水溶液作为液体介质，赤铁矿矿石被剥离成赤铁矿纳米片，产率为40%，且在水中具有显著的稳定性。因此，赤铁矿很容易滴铸在玻璃上，形成在可见光区域具有强吸收性的均匀薄膜。
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