Photoproduction of I2, Br2, and Cl2 on n-semiconducting powder

Photocatalytic Production of Hypochlorous Acid over Pt/WO3 under Simulated Solar Light

“…This is particularly important for large-scale applications. Byvik et al reported the production of Cl 2 from Cl – using a photocatalytic system consisting of a powder suspension of TiO 2 under UV light irradiation . The outcomes obtained by the group indicated that the powder suspension system could potentially drive the production of HClO using only light energy.…”

“…Byvik et al reported the production of Cl 2 from Cl − using a photocatalytic system consisting of a powder suspension of TiO 2 under UV light irradiation. 16 The outcomes obtained by the group indicated that the powder suspension system could potentially drive the production of HClO using only light energy. To the best of our knowledge, no reports on the direct use of solar light to achieve the photocatalytic production and accumulation of HClO from Cl − using a visible-light active semiconductor have been described so far.…”

Impact of Reaction Parameters and Water Matrices on the Removal of Organic Pollutants by TiO2/LED and ZnO/LED Heterogeneous Photocatalysis Using 365 and 398 nm Radiation

“…The adsorption of ions, the change of surface charge, and reaction with photogenerated charges also must be considered. The very slow conversion [ 82 ] and its negligible h VB + scavenging effect of Cl − in TiO 2 suspensions were reported [ 38 ]. Opposite to the TiO 2 , the Cl − are adsorbed well on the ZnO surface, having a positive charge [ 83 , 84 , 85 ] and enhancing the formation rate of ROS due to the hindered recombination of photoinduced e CB − and h VB + [ 83 ].…”

“…Opposite to the TiO 2 , the Cl − are adsorbed well on the ZnO surface, having a positive charge [ 83 , 84 , 85 ] and enhancing the formation rate of ROS due to the hindered recombination of photoinduced e CB − and h VB + [ 83 ]. Significant conversion of Cl − by h VB + to HClO has been reported in some cases [ 82 , 86 , 87 ]. The degradation of HClO via reaction with e CB − , or superoxide radical anions (O 2 •− ) also results in the formation of • OH [ 87 , 88 ], which may explain the increased r 0 7-HC for ZnO.…”

Synergetic effect enhanced photoelectrocatalysis

“…Scanning electrochemical microscopy (SECM) is adopted to detect the interfacial concentration distribution of photogenerated Br 2 (see S1, ESI †). When the photoelectrode is illuminated, the following reaction occurs: 17,18…”