Conventional versus lattice photocatalysed reactions: Implications of the lattice oxygen participation in the liquid phase photocatalytic oxidation with nanostructured ZnO thin films on reaction products and mechanism at both 254nm and 340nm

Impact of cobalt as dopant on surface morphologies of undoped ZnO nanostructured thin films

“…Morphologies Co:S1‐MS and Co:S1‐CG differ in surface, structure, grain size, and their orientation. Reduction of grain size with the increase in dopant concentration was in accordance with the study carried out by Ling et al Similar to the Co:S1‐MS results, these results indicate that to achieve Co:S1‐CG thin film with the characteristics shown in author's previous study to produce a high photocatalytic activity, a lower Co concentration is preferable. Doped nanostructures, Co:S1‐MS and Co:S1‐CG, have comparatively smoother crystals with the least defects compared with undoped S1‐MS and S1‐CG.…”

“…To study the effect of dopant, Co:ZnO were also prepared by using a modified form of the method "the low temperature hydrothermal solution doping technique" used by Wang et al 24 The same two (different) glass substrates (clean glass [CG] and magnetron sputtered [MS]), as in author's previous studies, 1-3 were used to prepare the four different surface morphologies. Molar compositions of the reactants Zn(NO) 3 .6H 2 O (0.425 mol), HMT (0.425 mol), and Co(NO) 3 .6H 2 O (0.15 mol) were mixed in a sealable glass jar in which the glass substrates (CG and MS) were suspended vertically by using a corrugated Teflon support, to achieve chemical deposition growth on one side of the substrate. The pH of the solutions was adjusted by using diluted nitric acid (4%) or diluted ammonium hydroxide solution (10%) to a pH value of 5 or 7.5 to give a clear, colourless solution.…”

“…The ability of undoped ZnO, as photocatalyst, is well studied in author's previous studies, [1][2][3] and it was found that some of the morphologies of supported photocatalyst did not remain reusable and stable depending upon the morphology because of the involvement of the Mars-van Krevelen reaction mechanism. This, reusability issue and stability, potentially can be overcome by making use of dopant, as it changes the suborbital configuration because of phase structure and optical properties.…”

Strong synergism between gold and manganese in an Au–Mn/triple-oxide-support (TOS) oxidation catalyst

“…This may lead to the release of the lattice or mobile oxygen [20,21] that could participate in an oxidation reaction via a Mars-Van Krevelen mechanism [20,[22][23][24][25].…”

Enhanced photocatalytic performance of Ga3+-doped ZnO

“…ZnO-based photocatalysts have been paid much attention because of its excellent properties, such as high chemical stabilizations, no toxicity and abundance in nature [5]. Heterogeneous photocatalysis with ZnO has been successfully applied to degrade organic pollutants [6,7].…”