Fabrication and characterization of needle shaped CuO nanoparticles and their application as photocatalyst for degradation of organic pollutants

Sapindus mukorossi seed shell extract mediated green synthesis of CuO nanostructures: an efficient catalyst for C–N bond-forming reactions

“…[1][2][3][4][5] Because of these attractive physicochemical properties, CuO NPs deserve to be extensively studied for use in more efficient ways in the diverse field of technology such as in gas sensors, energy storage systems, solar cell, biomedical, catalysis, photocatalysis, hightemperature superconductors and supercapacitors, and so on. [5][6][7][8][9][10][11][12][13][14] Furthermore, due to the high chemical potential, enhanced active surface area, chemical stability in a broad range of chemicals, and insolubility of CuO NPs in most of the solvents, they can act as an efficient heterogeneous catalyst in many precious chemical conversions. 7-9, 15, 16 However, the physicochemical properties and the application of CuO NPs are dependent on size, shape, morphology, crystal patterns and accessible surface area of the constituent particles which in turn largely depend upon the synthetic approaches.…”

Exploration of Copper Oxide Nanoneedle Electrosynthesis Applied in the Degradation of Methylene Blue

“…While comparing the materials studied in this research with the standard P25 TiO 2 degussa applied in the photodegradation of MB, higher or equal photocatalytic activity values were obtained in the preliminary study carried out with anodized Cu 2 O/CuO nanowires, which shows that this material presents potential characteristics to be applied in the photodegradation of organic dyes [43]. On the other hand, the application of CuO nanowires in the photodegradation of various dyes, such as methyl orange (MO), direct red 81 (DR) and victoria blue (VB), have been reported [31,[39][40][41][42]. However, these photocatalysts have been obtained by solution chemistry in basic media or by anodization with an electrolytic medium of only KOH [31,[39][40][41], and in no case has an electrolytic medium based on ethylene glycol together with fluoride ions been used [11,31,[39][40][41][42][43].…”

“…On the other hand, the application of CuO nanowires in the photodegradation of various dyes, such as methyl orange (MO), direct red 81 (DR) and victoria blue (VB), have been reported [31,[39][40][41][42]. However, these photocatalysts have been obtained by solution chemistry in basic media or by anodization with an electrolytic medium of only KOH [31,[39][40][41], and in no case has an electrolytic medium based on ethylene glycol together with fluoride ions been used [11,31,[39][40][41][42][43]. The electrolytic medium benefits the morphological order of the anodized nanostructures due to the high viscosity of the solvent and the interference generated by the fluoride ions on the surface of the copper layer during anodization [13,31].…”

“…Although it has been reported to obtain copper oxide nanoneedles by anodization using an electrolytic medium composed of KOH [31,[39][40][41], in no case has an ethylene glycol-based electrolyte medium been used in conjunction with fluoride ions [11,31,[39][40][41][42][43]. Tello et al, during 2021, have reported that an electrolytic medium based on the mentioned chemical compounds benefit the morphological order of anodized nanostructures, due to the high viscosity of the solvent and the interference generated by the fluoride ions on the surface of the copper layer during anodization [13,31].…”

Visible light‐active pure and lanthanum‐doped copper oxide nanostructures for photocatalytic degradation of methylene blue dye and hydrogen production

“…The percentage dye degradation by the photocatalyst was calculated by Equation () 40,41 : $$$\mathrm{Percentage}\unicode{x02007}\mathrm{Dye}\unicode{x02007}\mathrm{Degradation}=(({C}_{0}-C)/{C}_{0})\times 100,$$$ whereas $${C}_{0}$$ is the initial dye concentration at time t = 0 and $$C$$ is the final dye concentration after a time interval t .…”