Photocatalytic activity of CuInS₂ nanoparticles synthesized via a simple and rapid microwave heating process

Abstract

In this research, visible-light photocatalytic activities of CuInS 2 nanoparticles for degradation of three organic dyes (rhodamine B; RhB, methylene blue; MB, and methyl orange; MO) were investigated. The CuInS 2 nanoparticles were synthesized by a simple and rapid microwave heating process using sodium sulfide as a sulfur source and then characterized by x-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), Brunauer-Emmett-Teller (BET), and UV-vis diffuse reflectance spectroscopy (UV-vis DRS) techniques. The synthesized CuInS 2 nanoparticles exhibited excellent photocatalytic degradation activity to the cationic dyes (RhB and MB) when compared with that of anionic dye (MO). Zeta potential of the CuInS 2 photocatalyst was measured to elucidate the adsorption ability toward dye molecules. A possible photocatalytic degradation mechanism was proposed based on active species quenching experiments and Mott-Schottky analysis.

Synergistic Cr(VI) Reduction and Chloramphenicol Degradation by the Visible-Light-Induced Photocatalysis of CuInS2: Performance and Reaction Mechanism

“…Since absorbance (A) is directly proportional to the absorbance coefficient (α), the same E g value can be obtained by replacing α with A. CuInS 2 is a direct band gap semiconductor. As shown in Figure 4B , by projecting the linear part of its (A hv ) 2 vs. ( hv ) plot to zero, the E g value of CuInS 2 is obtained to be 1.52 eV, which is close to the reported values in the literature ( Guo et al, 2019 ; Chumha et al, 2020 ). This means that the CuInS 2 nanomaterial could be used as a visible-light-driven photocatalyst.…”

“…Copper indium sulfide (CuInS 2 ) is a promising I-III-VI 2 ternary chalcopyrite material with a wide range of advantages for photocatalytic and photovoltaic applications (Yang et al, 2021b;Spera et al, 2022;Wang et al, 2022). Its conduction band is made up of In 5s orbitals, and its valence band is made up of S 3p orbitals, resulting in a small band-gap (1.53 eV for the bulk CuInS 2 ) (Chumha et al, 2020;Guo et al, 2021). It has been investigated as a photocatalyst for CO 2 reduction (Xu et al, 2018), organic pollutant degradation (Guo et al, 2019;Kaowphong et al, 2019), and nitrate ion reduction (Yue et al, 2016), etc.…”

Synthesis strategies and application of ternary quantum dots — in cancer therapy

“…QDs have been synthesised by various researchers using this synthetic approach. AgInS 2 [66], CuGaSe 2 [67] CuInS 2 [68]. The small size, biocompatibility and thermal stability of these QDs makes them useful for biological applications [17].…”

Biocompatible CuInS2 Nanoparticles as Potential Antimicrobial, Antioxidant, and Cytotoxic Agents

“…CIS belongs to the I–III–VI 2 group having a tetragonal structure and possesses a direct band gap of ∼1.5 eV when in the bulk form . The CIS NPs find applications in numerous fields including photovoltaic devices, , light-emitting diodes, , photocatalysis, , bioimaging, , and so forth. Since NPs possess a larger surface-to-volume ratio than the bulk, they efficiently interact with tissues to provide a large number of active sites, resulting in effective biological activities …”