The photocatalytic reduction of dichromate using TiO2/beads as a photocatalyst was studied. The results showed hat 3.8 × 104 mol/dm3 of dichromate can be completely reduced into Cr3+ after illumination far 35 min...The photocatalytic reduction of dichromate using TiO2/beads as a photocatalyst was studied. The results showed hat 3.8 × 104 mol/dm3 of dichromate can be completely reduced into Cr3+ after illumination far 35 min with a 375 W medium pressure mercury lamp. The effects of factors such as the amount of TiO2/beads, initial concentration of dichromate, initial pH, nitrogen and oxygen atmosphere, and concentration of Fe3+ on the photocatalytic reduction of dichromate were investigated. A possible mechanism of the photocatalytic reaction was proposed. After illumination for 200 h, no significant loss of photocatalytic activity of TiO2/beads was observed.展开更多
The feasibility of photocatalytic degradation of X 3B azo dye by TiO 2/beads photocatalyst was studied. The effects of parameters such as the amount of TiO 2/beads, airflow, as well as the concentrations of H ...The feasibility of photocatalytic degradation of X 3B azo dye by TiO 2/beads photocatalyst was studied. The effects of parameters such as the amount of TiO 2/beads, airflow, as well as the concentrations of H 2O 2, Fe 3+ , Mg 2+ and Na + on the photocatalytic degradation of X 3B azo dye were also studied. The results showed that 25 mg/dm 3 X 3B azo dye can be photocatalytically degraded completely by 30 min illumination with a 375W medium pressure mercury lamp. Adding a small amount of H 2O 2 or Fe 3+ , the efficiencies of photocatalytic degradation of X 3B azo dye were increased rapidly. The mechanisms of the reaction and the role of the additives were also investigated. After 120 hours TiO 2/beads showed no significant loss of the photocatalytic activity.展开更多
The feasibility of photocatalytic decomposition of oil films floating on water using TiO2 supported on hollow glass microbeads was studied.The results showed that 100% of ethylbenzene and 78% of dodecane can be photoc...The feasibility of photocatalytic decomposition of oil films floating on water using TiO2 supported on hollow glass microbeads was studied.The results showed that 100% of ethylbenzene and 78% of dodecane can be photocatalytically removed after 8 h illumination with sunlight.The TiO2 supported on the hollow glass microbeads was not easily detached from the beads.After 150 h illumination there was no significant loss of the photocatalytic activity of TiO2 Some intermediate products of photocatalytic decomposition of dodecane were detected.展开更多
基金Project (No. 97415006) supported by the Natural science Foundation of Anhui province.
文摘The photocatalytic reduction of dichromate using TiO2/beads as a photocatalyst was studied. The results showed hat 3.8 × 104 mol/dm3 of dichromate can be completely reduced into Cr3+ after illumination far 35 min with a 375 W medium pressure mercury lamp. The effects of factors such as the amount of TiO2/beads, initial concentration of dichromate, initial pH, nitrogen and oxygen atmosphere, and concentration of Fe3+ on the photocatalytic reduction of dichromate were investigated. A possible mechanism of the photocatalytic reaction was proposed. After illumination for 200 h, no significant loss of photocatalytic activity of TiO2/beads was observed.
文摘The feasibility of photocatalytic degradation of X 3B azo dye by TiO 2/beads photocatalyst was studied. The effects of parameters such as the amount of TiO 2/beads, airflow, as well as the concentrations of H 2O 2, Fe 3+ , Mg 2+ and Na + on the photocatalytic degradation of X 3B azo dye were also studied. The results showed that 25 mg/dm 3 X 3B azo dye can be photocatalytically degraded completely by 30 min illumination with a 375W medium pressure mercury lamp. Adding a small amount of H 2O 2 or Fe 3+ , the efficiencies of photocatalytic degradation of X 3B azo dye were increased rapidly. The mechanisms of the reaction and the role of the additives were also investigated. After 120 hours TiO 2/beads showed no significant loss of the photocatalytic activity.
基金Project, (No. 97415006) supported by the Natural Science Foundation of Anhui Province
文摘The feasibility of photocatalytic decomposition of oil films floating on water using TiO2 supported on hollow glass microbeads was studied.The results showed that 100% of ethylbenzene and 78% of dodecane can be photocatalytically removed after 8 h illumination with sunlight.The TiO2 supported on the hollow glass microbeads was not easily detached from the beads.After 150 h illumination there was no significant loss of the photocatalytic activity of TiO2 Some intermediate products of photocatalytic decomposition of dodecane were detected.