Lanthanum-based metal-organic framework nanorods for removal of dye pollutants with machine language predictions

Abstract

According to the excellent redox and optical properties that may be tuned, lanthanum (La) is a material that is frequently employed in catalytic applications. In this instance, an exciting metal-organic framework made of lanthanum metal was produced using an effortless ultrasonic method using organic ligands like Benzene-1,3,5-tricarboxylic acid (BTC). UV–vis DRS, XPS, powder XRD, and FE-SEM are utilized to evaluate the La(1,3,5-BTC)(H₂O)₆ (La-BTC) metal-organic frameworks substance to show their optical absorption functions, chemical constitution, crystalline characteristics, and microscopic characteristics. Considering a band gap energy of 2.91 eV, La-BTC MOF has a shape resembling a nanorod and is capable of optical absorption in the range of the visible spectrum. During visible photon exposure with a light intensity of 80,600 lx, the photocatalytic decomposition of Methylene blue (MB) dye was conducted to test the photocatalytic effectiveness of La-BTC nanostructures. The La-BTC MOF resulted in the optimal degradation of the MB dye with an effective efficiency of 96.6 % within 180 min and corresponds to a pseudo-first-order mechanism exhibiting rate constants in the subsequent order: Photocatalysis (0.0196 min⁻¹) > Adsorption (0.0027 min⁻¹) > Photolysis (0.0003 min⁻¹). Our findings show that the La-BTC MOF nanostructures' active sites are the primary factor influencing their capacity to remove dye preferentially. Besides emphasizing here, machine language's value in advancing experimental insights and validating photocatalytic performance.