A photocatalyst air cleaning device capable of capturing carbon dioxide.The system comprises a fan body and at least one photocatalyst lamp group.The fan body comprises a fan body base.The fan base can be assembled to connect a section of the fan base and a fastener adjacent to the section；The photocatalyst lamp group ring is arranged along the periphery of the sector and comprises a light guide tube.The utility model is a hollow pipe body with two ends forming an opening and is fixed to the fan body by the fastener；One LED lamp group,It comprises at least one light bar arranged along the length direction of the light guide tube and a plurality of LED grains evenly distributed on the light bar；A photocatalyst reaction piece,It is selectively arranged on the inner or outer wall of the light guide tube.Therefore, it can improve the photocatalyst reaction efficiency, promote the carbon dioxide capture function, and increase the effect of air purification and sterilization.一種可捕集二氧化碳之光觸媒空氣清淨裝置，其係包括一風扇本體以及至少一光觸媒燈組，該風扇本體包含一扇體基座、可組卸地連接該扇體基座的一扇面及設於該扇體基座為鄰近該扇面的一扣合件；光觸媒燈管組環沿該扇面的外圍形成配置且包含：一導光管，其為二端形成有開口的中空管體且由該扣合件固定於該風扇本體； 一LED燈組，其包含沿該導光管的長度方向布設的至少一燈條與均勻分布於該燈條上的多個LED晶粒；一光觸媒反應件，其選擇性配置於該導光管內壁或外壁。藉此，用以提升光觸媒反應效力、促進捕集二氧化碳機能、以及增加淨化空氣與殺菌之作用功效。
