Revealing the structural and optical constant of the UiO-66 coated with MoS2 QDs

Abstract

We synthesized the pristine and MoS₂ QDs coated the UiO-66 nanostructures employing an eco-friendly drop casting method and studied the physical properties of nanostructures by experimental methods. The X-ray diffraction analysis confirmed that all samples exhibit a singular cubic phase with space group Fm3m. The presence of MoS₂ quantum dots coating led to an observed growth in crystalline size and an increase in structural defects. A rise in the optical energy gap (4.02–5.05 eV) and an improvement in transmittance were noted as the concentration of coated MoS₂ quantum dots increased. The film thickness of UiO-66@X%MOS₂ (X% = 0, 10, 15, 20, and 25) was around 140 ± 5 nm and the increase in the concentration of MoS₂QDs was found to be inversely proportional to the decrease in refractive index. The absolute part values of the dielectric constant (ε₁) are more significant than the imaginary part (ε₂). Optical conductivity decreases with the higher content of embedded MoS₂ QDs (from 2.75 × 10¹⁰ to 1.75 × 10¹⁰) at wavelengths 300–250 nm. Thus, MoS₂ QDs-coated UiO-66 nanostructures show suitable potential applications in: optoelectronics, efficient conversion of energy, and numerous other works implemented in the sphere of nanotechnology.