Improved photocatalytic conversion of high−concentration ammonia in water by low−cost Cu/TiO2 and its mechanism study

Water-driven boost in the visible light photocatalytic performance of Cs2AgBiBr6 double perovskite nanocrystals

“…The p-benzoquinone (BQ), ethylenediaminetetraacetic acid disodium salt (EDTA-2Na), tert-butanol (t-BuOH) and AgNO 3 were used as the quenching agents of cO 2 À , h + , cOH and e À , respectively, in a solution containing the catalyst. [64][65][66][67] As can be seen from Fig. 6a and d, when BQ was added, the RhB degradation rates for the pristine Cs 2 -AgBiBr 6 NCs and water-soaked Cs 2 AgBiBr 6 NCs decreased to As shown in Fig.…”

Photocatalytic Treatment of Different Types of High−Concentration Ammonia Wastewater by Cu/TiO2 Film and its Mechanism Study

“…The reason is probably that the increase in pH facilitates generation of hydroxyl radicals • OH, which mainly produces nitrite and nitrate nitrogen. According to the previous work (Feng et al 2021), the key to generation of gaseous − N species is superoxide radical •O 2 − . As the pH increases, superoxide radical •O 2 − was gradually depleted due to the limited dissolved oxygen in the closed reaction system.…”

“…For example, high salinity ammonia nitrogen wastewater (NaCl and Na 2 SO 4 ) will inhibit the microbial activity of the biochemical system and reduce the abundance and diversity of microbial communities, especially high concentrations of Cl − will reduce the biodegradation e ciency of ammonia nitrogen (Chen et (Takata et al 2019). We also found that 0.3 wt% Cu loaded TiO 2 photocatalyst shows comparable photocatalytic activity with Pt/TiO 2 for oxidizing low concentration of ammonia, but exhibits much higher photocatalytic activity for oxidizing high concentration of ammonia, primarily ascribed to the Cu metal mediated complexation effect (Feng et al 2021). In order to practically employ the photocatalyst powder, immobilization of powder onto solid substrate or deposition onto a lm is necessary to improve its stability and recyclability (Zhou et al 2019).…”

Prospects for the use of laser spectroscopy to characterize dye degradation photocatalyst nanoparticles: a review

“…In addition, the concentration of vacancies can be roughly estimated by the double integration of vacancy peaks in EPR spectra. 60 XRD is a conventional material characterization tool that is applied to photocatalyst nanoparticles to determine atomic spacing, compound morphology, physical information, and other information. 61,62 In microscopic imaging, AFM has a small and slow imaging area.…”