Karajz Dániel Attila, Rottenbacher Kincső Virág, Hernádi Klára, Szilágyi Imre Miklós
Department of Inorganic and Analytical Chemistry, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, Szent Gellért tér 4, H-1111 Budapest, Hungary.
Institute of Physical Metallurgy, Metal Forming and Nanotechnology, University of Miskolc, H-3515 Miskolc, Hungary.
Molecules. 2025 Jan 7;30(2):205. doi: 10.3390/molecules30020205.
Inverse opals (IOs) are intensively researched in the field of photocatalysis, since their optical properties can be fine-tuned by the initial nanosphere size and material. Another possible route for photonic crystal programming is to stack IOs with different pore sizes. Accordingly, single and double IOs were synthesized using vertical deposition and atomic layer deposition. In the case of the double IOs, the alternating use of the two preparation methods was successfully performed. Hydrothermally synthesized 326 and 458 nm carbon nanospheres were utilized to manufacture two different IOs; hence the name 326 nm and 458 nm IOs. Heat treatment removed the sacrificial template carbon nanospheres, and the as-deposited TiO crystallized upon annealing into nanocrystalline anatase form. Reflectance mode UV-visible spectroscopy showed that most IOs had photonic properties, i.e., a photonic band gap, and by the "slow" photon effect enhanced absorbance, except the 326 nm IO, even though it also had an increase in absorbance. The IOs were tested by photocatalytic degradation of Rhodamine 6-G under visible light. Photocatalytic experiments showed that the 458 nm IO was more active and the double IOs showed higher efficiency compared to monolayers, even if the less effective 326 nm IO was the top layer.
反蛋白石（IOs）在光催化领域受到广泛研究，因为其光学性质可通过初始纳米球尺寸和材料进行微调。光子晶体编程的另一种可能途径是堆叠具有不同孔径的IOs。因此，采用垂直沉积和原子层沉积法合成了单IOs和双IOs。对于双IOs，成功实现了两种制备方法的交替使用。利用水热合成的326和458nm碳纳米球制备了两种不同的IOs，因此分别命名为326nm IO和458nm IO。热处理去除了牺牲模板碳纳米球，沉积态的TiO在退火后结晶为纳米晶锐钛矿形式。反射模式紫外-可见光谱表明，除326nm IO外，大多数IOs都具有光子特性，即光子带隙，并通过“慢”光子效应增强了吸光度，尽管326nm IO的吸光度也有所增加。通过在可见光下对罗丹明6-G进行光催化降解对IOs进行了测试。光催化实验表明，458nm IO活性更高，与单层IOs相比，双IOs效率更高，即使效率较低的326nm IO作为顶层。
