Influence of oxygen addition on photocatalytic oxidation of aqueous ammonia over platinum-loaded TiO2

Influence of pH and pH adjustment conditions on photocatalytic oxidation of aqueous ammonia under airflow over Pt-loaded TiO2

“…(2)] [15], it is postulated that the rate of nitrite oxidation at lower pH is faster than that at higher pH.…”

“…However, we found that the reaction rate increased significantly with the addition of oxygen to the reaction system, enabling the oxidation of relatively high ammonia concentrations in a short time http://dx.doi.org/10.1016/j.apcata.2015.02.024 0926-860X/© 2015 Elsevier B.V. All rights reserved. [15]. The addition of oxygen enhanced the treatment efficiency but also increased the yields of undesirable products such as nitrite and nitrate.…”

Photocatalytic H2 generation from aqueous ammonia solution using ZnO photocatalysts prepared by different methods

“…Shorter green emission maximum of ZnO(1) may be caused by the transition from conduction band to deep acceptor levels caused by access of oxygen such as oxygen on Zn site (O Zn ) or oxygen interstitial (O i ) (see Fig. 5b) according to the transition energies of these defects [36]. Combination of Zn vacancy (V Zn ) (deep acceptor level) with Zn interstitial (Zn i ) (shallow donor level), which also has transition energy in green spectral range, is less probable because these defects would be accompanied also by emission in the blue range (400e450 nm), which is missing in the ZnO(1) spectrum.…”

“…The capillary column used for the gas chromatography separation was ShinCarbon ST Micropacked. Another gas chromatograph (Agilent 7890 equipped with MolSieve column) was used for the determination of nitrous oxide, which might be a possible product if the oxidation of ammonia occurs [35,36].…”

Activated Carbon Loaded Ti3+ Self-Doped TiO2 Composite Material Was Prepared By Microwave Method and Degradation of Rhodamine B Under UV-Light

“…For example: Dozzi and Shibuya doped Pt group metals in TiO2, the research results showed that the doping of Pt group metals leads to a red shift in the absorption spectrum. And the doping hindered the recombination of electrons and holes, which effectively improved the oxidation capacity of holes [20,21] . Xu and Kamaljeet Singh doped rare earth elements, which were shown to convert near-infrared and visible light into visible and ultraviolet light.…”