Role of defects on the enhancement of the photocatalytic response of ZnO nanostructures

Impact of Al doping on a hydrothermally synthesized β-Ga2O3 nanostructure for photocatalysis applications

“…Meanwhile, defects in the photocatalysts can either enhance or degrade the photocatalytic activity by acting as carrier separation and recombination sites, respectively. [54][55][56] Fig. 6(b) shows that as the Al concentration increased (0.6 to 3.2 at%), the crystallographic, oxygen, and GB-related defects continued to increase but accordingly the photocatalytic activity continued to decrease.…”

Preparation, Characterization and Photocatalytic Activity of La-Doped Zinc Oxide Nanoparticles

“…Zinc oxide nanomaterials have been synthesized by different techniques such as the co-precipitation method [4,5], sol–gel method [6,7,8], combustion method [9], hydrothermal method [10], and thermal decomposition [1], depending on the desired structure. ZnO, when modified, could be utilized as a base material for diluted magnetic semiconductors [11], gas sensors [12,13], and photocatalysts [14,15,16,17]. In photocatalytic applications, ZnO nanoparticles were used to remove numerous azo dyes, such as methylene blue [18], methyl orange [17], rhodamine B [19], and methyl red [20].…”

Highly c-axis Oriented ZnO Thin Films by Sol-gel Method

“…[55,59]. The peaks around 1590 and 1400 cm -1 were related to asymmetric and symmetric stretch vibrations of COObonds which were from organic residues [58,60,61]. Organic residues were disappeared with increasing temperature.…”