## 2 Materials and Methods
### Methods
Elemental analysis was conducted via X-ray fluorescence (XRF) using a Rigaku ZSX Primus II spectrometer (Rigaku Corp., Tokyo, Japan) equipped with a 4.0 kW X-ray Rh tube. Data processing was performed using EZscan combined with Rigaku SQX fundamental parameters software v.5.18, operating in a standardless mode. The textural analysis of the powders was performed through nitrogen adsorption-desorption analysis at \(-\)196 \({}^{\circ}\)C using a ASAP 2020 automated gas adsorption analyzer (Micromeritics, Norcross, GA, USA). Before analysis, the samples were degassed under vacuum at 200 \({}^{\circ}\)C for 5 h. The specific surface area was determined using the Brunauer-Emmett-Teller (BET) equation, while pore size distribution curves were generated from the adsorption branch based on the Barrett-Joyner-Halenda (BJH) model. The total pore volume was calculated from the amount adsorbed at a relative pressure of 0.99. The UV-VIS spectra of the samples were recorded using a Perkin Elmer Lambda 35 spectrophotometer (PerkinElmer, Norwalk, CT, USA), equipped with an integrating sphere, in the wavelength range of 200-1100 nm [ultraviolet (200-400 nm), visible (400-780 nm), and near-infrared (780-2500 nm)], using a white reflective standard Spectralon. ROS monitoring was performed according to previously reported works [62; 63]:  
-O\({}_{2}\)- photogeneration. UV-Vis spectra of aqueous mixtures containing 50 uM XTT sodium salt 9([2, 3-bis(2-methox-4-nitro-Sulfophenyl)-2H-tetrazolium-5-carboxanilide]) (AlfaAesar, Karlsruhe, Germany) and LTA, LTA-Pt powders (2 mg) were measured with an Specord 200 Plus Spectrophotometer (Analytik Jena, Jena, Germany). The reaction was carried out under simulated solar light of AM1.5 (1000 W m\({}^{2}\), Peccel-L 01) (Peccell, Kawasaki, Japan). -OH radical trapping experiments have also been performed by PL spectroscopy using the Cary Eclipse G9800A fluorescence spectrometer (Agilent Technologies, Penang, Malaysia) with coumarin (Merck, Darmstadt, Germany), checking for the presence of umbelliferone (a fluorescent product which peaked at 470 nm) and proving that hydroxyl radicals were missing. The photoluminescence spectroscopy measurements were performed at room temperature using a Carry Eclipse G9800A fluorescence spectrometer (Agilent Technologies, Penang, Malaysia) with excitation/emission slit widths of 10/10 nm. The powders of interest (2 mg) were suspended in 3 mL of water containing 30 uL absolute ethanol. The catalytic activity of the prepared materials was tested for the oxidative degradation of ethanol in the gaseous phase under simulated solar light irradiation. As part of the experimental process, 0.05 g of photocatalyst powder was deposited as a uniform layer (surface area of about 3.6 cm\({}^{2}\) and 1 mm thicknesses) on a substrate. The surface was then exposed to simulated solar light. Ethanol (7.2 \(\upmu\)L) (Merck, Darmstadt, Germany) was introduced into the photoreactor and evaporated into a volume of 120 cm\({}^{3}\) air and then left in the dark for 30 min to balance the experimental system. A cryostat was used to regulate and maintain the photoreactor's internal temperature at 25 \({}^{\circ}\)C. A Peccell L01 solar simulator (Peccell, Kawasaki, Japan) provided the AM1.5 (1000 W/m\({}^{2}\)) solar light. A gas chromatograph (Agilent, Model 7890A, Wilmington, DE, USA) equipped with the Flame Ionization Detector (FID) was used to analyze 200 \(\upmu\)L of gas sample every 30 min, and a gas chromatograph (Buck Scientific, East Norwalk, CT, USA) equipped with the Thermal Conductivity Detector (TCD) was used to analyze 500 \(\upmu\)L of gas sample every 60 min. The photocatalytic activity of the investigated catalysts was monitored for 180 min.