Cobalt-doped zincblende–wurtzite mixed-phase ZnO photocatalyst nanoparticles with high activity in visible spectrum

Solution grown ZnO rods: Synthesis, characterization and defect mediated photocatalytic activity

“…At a higher reaction temperature of 80 ± 5 • C, the concentration of Zn(OH) + active growth unit increases which leads to the rapid formation of ZnO at a faster rate as shown in Eqs. (8)(9)(10)(11). …”

“…In order to understand the photocatalytic activity exhibited by the solution grown ZnO rods, we have looked into various parameters that in principle control the photocatalytic activity such as phase purity, particle size, surface area, surface hydroxyl groups, surface defects and their nature [8,9,47,48]. The BET surface areas of S-3 and S-4 samples were 6.81 and 7.2 m 2 /g, respectively.…”

“…The large number of publications appearing in the area of ZnO based DSSCs, throw light on the increased use of ZnO and ZnO based nanomaterials as alternative photoanodes to TiO 2 in the Dye-Sensitized Solar cells [4][5][6]. In addition, the recent studies indicated that ZnO can also be used as a promising photocatalyst for the degradation of organic pollutants under UV/visible/solar irradiation [7][8][9][10][11][12][13]. Most of the photocatalytic or photodegradation studies using ZnO as a catalyst have been focussed on rhodamine B, methylene blue or methyl orange dyes, with a very few on methyl violet [14,15].…”

Visible-light-driven photocatalytic properties of self assembled cauliflower-like AgCl/ZnO hierarchical nanostructures

“…Doping UV active photocatalysts with metals and non-metals is one of the commonly used approaches for the fabrication of visible light active photocatalysts. There are several reports in literature of doping ZnO with metals such as Ag [17], Eu [18], Cu [19], Ni [20], Cu [21], etc. But metal dopants can also act as recombination centers for the photogenerated carriers as they introduce deep impurity levels in the forbidden band of the photocatalyst [22].…”

EPR detection of sphalerite ZnO in mechanically treated ZnO+0.1C nanosystem

“…The observation of sphalerite and wurtzite ZnO phases in Pd-Zn alloys after the internal oxidation at elevated temperatures allows to conclude that the formation of stacking faults in ZnO Wt is strongly correlated to its nucleation [18]. A single-step route for the synthesis of biphasic cobalt doped ZnO, having wurtzite and metastable zinc blende phases present, has been reported in [19]. It was found in [20] that the nucleation of ZnO Wt tetrapods is associated with the presence of the ZnO ZB phase.…”