The invention discloses a photocatalytic evaluation characterization device and method for
carbon dioxide reduction. The device comprises a
photocatalysis mechanism, a gas path mechanism, a
water vapor generation mechanism and a gas chromatograph, the
photocatalysis mechanism comprises a blast
drying box, a
light source part, a catalytic reactor and a
vacuum pump, the catalytic reactor comprises areaction tank, a four-corner supporting frame, an inlet pipeline part and an outlet pipeline part, and the four-corner supporting frame comprises an
activated carbon carrying net and supporting legs.The method comprises the following steps of: 1, preparing a photocatalyst; 2, connecting and debugging the device; 3, filling the photocatalyst; 4, performing preparation before reaction; 5, carryingout photocatalytic reduction reaction on
carbon dioxide; 6, detecting the concentration of
methane gas and the concentration of
carbon monoxide gas; and 7, obtaining the optimal photocatalyst for preparing
methane and the optimal photocatalyst for preparing
carbon monoxide. The photocatalytic evaluation characterization device and method for
carbon dioxide reduction are reasonable in design, andimprove the accuracy of photocatalytic evaluation characterization of carbon dioxide reduction.