Up-scaling the synthesis of Cu2O submicron particles with controlled morphologies for solar H2 evolution from water

Evolution of Structural and Optical Properties of Cuprous Oxide Particles for Visible Light Absorption

“…Thus, the spectra indicate that the samples are dominated by Cu +1 (Cu(I) species) with the presence of Cu(II) species since the shoulders at 932 eV and 955 eV assigned to Cu +2 are not observed. However, the presence of the CuO phase (Cu(II) species) is confirmed by the detection of the satellites [17]. In Figure 5(a), it is observed that the intensity of the satellite 9 Journal of Nanomaterials decreases with the increase of the glucose content, suggesting a decrease in CuO content [56].…”

“…It can be seen from Figure 5(a) that all the spectra consist of two main [33,57]. However, the samples show satellite peaks around 940-945 eV and 960-966 eV [17,56], which are from CuO signals [56]. Thus, the spectra indicate that the samples are dominated by Cu +1 (Cu(I) species) with the presence of Cu(II) species since the shoulders at 932 eV and 955 eV assigned to Cu +2 are not observed.…”

“…Cuprous oxide is used in electrodes for lithium-ion batteries, photochemical cells, hydrogen production, sensors, photocatalysts, supercapacitors, magnetic storage, and water splitting [15][16][17][18][19][20][21], as well as a bactericide, colorant, and additive for corrosion-proof coatings [22][23][24]. Various methods have been developed to obtain Cu 2 O, such as the water bath method, the SILAR (Successive Ionic Layer Absorption and Reaction) method, the polyol method, chemical reduction, and sol-gel [4,10,17,[25][26][27][28][29][30][31][32]; however, some of these methods require special equipment [17,27,28], catalysts, organic additives, or expensive surfactants [25,31,32].…”

“…The use of glucose as a reducing agent has the advantage of being environmentally friendly, resulting in green chemical synthesis. Besides, glucose is cheap and highly selective in producing Cu 2 O [24,33], and its use is suitable for the development of Cu 2 O particles with different morphologies like spheres, cubes, beveled cubes, octahedrons, flower shapes, nanowires, nanorods, hierarchical structures, cages, and hollow structures [17,25,34,35] by changing the temperature, pH, reagents, solvents, reaction times, and surfactants control [36][37][38][39][40][41][42][43].…”

Synthesis of Hollow Silica Nanocubes with Tuneable Size and Shape, Suitable for Light Scattering Studies

“…Additionally, the electronic structure of Cu 2 O allows for water splitting applications [16,17] and it has anti-bacterial [18] and gas sensing properties [19]. For self-assembly studies, cuprous oxide is also interesting because it appears in a variety of shapes [20] and can be synthesized at significant high yields [21,22]. In 2002, Gou and Murphy were the first to report the wet synthesis of cuprous oxide nanocubes [23].…”