Spirulina platensis mediated biosynthesis of Cuo Nps and photocatalytic degradation of toxic azo dye Congo red and kinetic studies

Self-Powered Photoelectrochemical Assay for Hg2+ Detection Based on g-C3N4-CdS-CuO Composites and Redox Cycle Signal Amplification Strategy

“…The diffraction peaks of CdS at 26.5 • , 37.6 • , and 43.7 • correspond to the (002), (102), and (103) crystal planes, respectively, which correlate with the wurtzite phase standard cards (JCPDS 80-0006) [35]. The diffraction peaks of the CuO nanoparticles at 35.6 • , 38.7 • , and 48.8 • , in accordance with their monoclinic and crystalline nature, correspond to the (110), (111), and (200) crystal planes, respectively [33].…”

“…The diffraction peaks of CdS at 26.5°, 37.6°, and 43.7° correspond to the (002), (102), and (103) crystal planes, respectively, which correlate with the wurtzite phase standard cards (JCPDS 80-0006) [35]. The diffraction peaks of the CuO nanoparticles at 35.6°, 38.7°, and 48.8°, in accordance with their monoclinic and crystalline nature, correspond to the (110), (111), and (200) crystal planes, respectively [33]. In the FT-IR spectra (Figure 1H) with the direct detection (Resolution: 4, Number of scans: 8, Detector: DTGS), g-C3N4 (curve a) exhibits strong absorption peaks in the range of 1200-1600 cm −1 , which correspond to C-N heterocycles.…”

“…The large surface area of g-C 3 N 4 serves as an effective anchor for loading CdS NPs. When the CdS QD-g-C 3 N 4 /FTO electrode is covered with CuO nanoparticles (Figure 1D), the CuO nanoparticles appear to be nearly spherical [33]. SEM (Figure 1E,F) and elemental mapping by energy dispersive X-ray spectroscopy (Figure 1I) reveal that C, N, Cd, S, Cu, and O exist in the g-C 3 N 4 -CdS-CuO electrode, indicating that the composite material is successfully loaded onto the FTO electrode.…”

Microbial fuel cell (MFC) performance with pigments bikaverin and congo red as electrochemical mediators for optmization power energy

“…Another important factor that adds and confirms the value of the results obtained with bikaverin is related to the high toxicity of the Congo red pigment. Using such a harmful substance makes BC unfriendly to the environment, from contaminating soil, riverbeds, and lakes (Alsamhary, K., et al 2022) to causing problems in various tissues of the human body (Frid, P., Anisimov, S. V., & Popovic, N. 2007), mainly in the central nervous system (Setti, S. E., et al 2021). In terms of energy production optimization, the mediators proved to be quite efficient in raising a maximum blank Id, from 155 mA.cm -2 to 230 mA.cm -2 with bikaverin and 273 mA.cm -2 , an increase of 150% and 176% respectively.…”

Amine-functionalized MOF-derived carbon materials for efficient removal of Congo red dye from aqueous solutions: simulation and adsorption studies

“…For this purpose, various technologies such as electro-occulation, membrane ltration, ultraltration, photodegradation and adsorption were adopted. [3][4][5][6][7][8] Among them, adsorption is considered to have great potential for industrial applications, thanks mainly to its numerous advantages such as economic viability, high efficiency, ease of operation and low secondary pollution. Carbon materials such as activated carbon, biochar and carbon nanotubes are oen used in water treatment, but lack reproducibility and designability results in poor adsorption capacity.…”