Daskalova Desislava, Aguila Flores Gonzalo, Plachetka Ulrich, Möller Michael, Wolters Julia, Wintgens Thomas, Lemme Max C
Advanced Microelectronic Center Aachen, AMO GmbH, 52074 Aachen, Germany.
Chair of Electronic Devices, RWTH Aachen University, 52074 Aachen, Germany.
ACS Appl Nano Mater. 2023 Aug 16;6(16):15204-15212. doi: 10.1021/acsanm.3c02867. eCollection 2023 Aug 25.
Titanium dioxide (TiO) thin films are commonly used as photocatalytic materials. Here, we enhance the photocatalytic activity of devices based on titanium dioxide (TiO) by combining nanostructured glass substrates with metallic plasmonic nanostructures. We achieve a three-fold increase of the catalyst's surface area through nanoscale, three-dimensional patterning of periodic, conical grids, which creates a broadband optical absorber. The addition of aluminum and gold activates the structures plasmonically and increases the optical absorption in the TiO films to above 70% in the visible and NIR spectral range. We demonstrate the resulting enhancement of the photocatalytic activity with organic dye degradation tests under different light sources. Furthermore, the pharmaceutical drug Carbamazepine, a common water pollutant, is reduced in the aqueous solution by up to 48% in 360 min. Our approach is scalable and potentially enables future solar-driven wastewater treatment.
二氧化钛（TiO₂）薄膜通常用作光催化材料。在此，我们通过将纳米结构玻璃基板与金属等离子体纳米结构相结合，提高了基于二氧化钛（TiO₂）的器件的光催化活性。我们通过对周期性锥形网格进行纳米级三维图案化，使催化剂的表面积增加了三倍，从而创建了一个宽带光吸收器。铝和金的添加激活了结构的等离子体特性，并使TiO₂薄膜在可见光和近红外光谱范围内的光吸收增加到70%以上。我们通过在不同光源下进行有机染料降解测试，证明了由此产生的光催化活性增强。此外，常见的水污染物药物卡马西平在水溶液中360分钟内最多可减少48%。我们的方法具有可扩展性，并有可能实现未来的太阳能驱动废水处理。
