Affect of Pressure on Photoreduction of CO2 to Acetaldehyde in Aqueous Suspensions of TiO2

A new equipment which bears high pressure was designed for heterogeneous photocatalysis. Acetaldehyde was the major product on suspend nano anatase titanium dioxide in liquid phase .The yield of acetaldehyde was increased with an increase in the pressure of CO₂ at first, then decreased sharply with further increase in the pressure after an optimum pressure. What´s more, the optimum pressures were varied against different temperatures. The yield of acetaldehyde could increased by as much as 3.51 times.