Synergistic promotion of the photocatalytic efficacy of CuO nanoparticles by heteropolyacid‐attached melem: Robust photocatalytic efficacy and anticancer performance

Abstract

The in situ photocatalytic oxidation of aromatic alcohols to aldehydes by air under visible-light-driven condition is an attractive and beneficial route regarding environmental crises and worldwide energy economy. Herein, CuOmelem-heteropolyacid nanophotosensitizer is disclosed as an efficient heterostructured nanocomposite involving H 5-n PW 10 V 2 O 40 nÀ … (melem-NH 3 + ) n ionic liquid, successfully prepared via a facile and straightforward procedure.This nanocomposite is characterized employing routine techniques such as Xray diffraction (XRD), Fourier transform infrared (FT-IR), diffuse reflectance spectra (DRS), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), field emission scanning electron microscopy (FE-SEM),and Brunauer-Emmett-Teller (BET). The resultant nanocomposite exhibited superior photocatalytic efficacy than its pristine melem, HPA, and CuO constituents in the in situ photo-oxidation of benzylic alcohols and in the fast condensation with o-phenylenediamine to generate a range of 2-substituted benzimidazoles, as important precursors in the synthesis of important pharmaceuticals under the illumination of a green laser light (λ 535 nm). This study suggests a radical pathway involving reactive species such as •O 2 À and OH• together with h + in a photocatalytic process. Stability and reusability experiments along with hot filtration test ensured sufficient reproducibility of the nanophotocatalyst in the reaction medium. At the final part of this study, the in vitro cellular cytotoxicity of CuO-melem-heteropolyacid nanohybrid material was evaluated on A549 human lung cancer cell line with the MTT assay.The distinct reduction in cell viability affirmed cytotoxicity of the nanomaterial against the performed cell line.

Carbon Quantum Dots Bridged TiO2/CdIn2S4 toward Photocatalytic Upgrading of Polycyclic Aromatic Hydrocarbons to Benzaldehyde

“…After 10 min of reaction under simulated sunlight (degradation of 65.2% PAHs), the photocatalyst was removed and filtered. Then the filtrate was illuminated for another 50 min under the same condition with no significant increase in degradation, confirming that no leaching of the photocatalyst components emerged [ 72 ]. Meanwhile, the ICP-MS analysis was performed to reveal the metal leaching of the pure filtrate [ 73 ].…”

Magnetic nanoparticle-supported eosin Y salt [SB-DABCO@eosin] as an efficient heterogeneous photocatalyst for the multi-component synthesis of chromeno[4,3-b]chromene in the presence of visible light

“…Ultimately, the accumulated electrons with strong reducibility would reduce O 2 to ˙O 2 − ( Scheme 3 ). 74 …”

“…Ultimately, the accumulated electrons with strong reducibility would reduce O 2 to cO 2 − (Scheme 3). 74 3.2.7 Comparison of the present protocol with some reported similar methods. The gained results for the catalytic activity of SMNPs@DABCO@eosin were compared with a number of similar reports on the preparation of chromeno [4,3-b]chromenes in terms of catalyst amount, reaction time, temperature, solvent and yield%, as shown in Table 4.…”

Photocatalytic Degradation of Dyes Present in Industrial Effluents: A Review

“…[72] An SB-DABCO@eosin catalyst was used in a green, one-pot, multicomponent process to make different chromeno[4,3-b]chromenes, [73] different 2-substituted benzimidazoles, [74] and substances that fight cancer. [75,76]…”

“…Tayebee and co-workers [72][73][74][75][76] have synthesized a number of 2G photocatalysts that are good at breaking down dyes, making chromeno [4,3-b]chromenes, substituting benzimidazoles, and fighting cancer. For example, WZnO/HPA nanocomposite photocatalyst is used to degrade various pharmaceutical wastes and methylene blue dye.…”