| Project/Area Number |
16560679
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Catalyst/Resource chemical process
|
|---|
| Research Institution | Kinki University |
|---|
Principal Investigator |
KOMINAMI Hiroshi Kinki University, Applied Chemistry, Associate Professor, 理工学部, 助教授 (00257966)
|
|---|
| Project Period (FY) |
2004 – 2005
|
| Project Status |
Completed (Fiscal Year 2005)
|
| Budget Amount *help |
¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 2005: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 2004: ¥2,300,000 (Direct Cost: ¥2,300,000)
|
|---|
| Keywords | Photocatalyst / Titanium oxide / reductive reaction / nitrate / nitrogen |
|---|
| Research Abstract |
Photocatalytic reduction of nitrate to nitrogen in the presence of various hole scavengers was investigated. At first, effect of pH of the suspension on reduction of nitrate in aqueous suspension of cupper-loaded titanium oxide particles was examined in the presence of oxalate. The reduction product at low pH was ammonia while nitrite was main product at high pH. When photocatalytic reaction was carried out at pH 12 using palladium loaded titanium oxide particles, nitrate was reduced to nitrogen. Optimum amounts of Cu and Pd were determined to be 0.5 wt% and 1.0 wt%, respectively. The reaction rate gradually decreased with prolonging reaction time, indicating that carbonate formed from oxalate suppressed the adsorption of substrate(s). When carbonate was removed from the suspension by pH swing, the original reaction rate was obtained.
|
