Low-temperature efficient SCR denitration catalyst and preparation method thereof

The invention discloses a low-temperature efficient SCR denitration catalyst and a preparation method thereof. The catalyst is prepared from attapulgite, tetrabutyl titanate, acetylacetone, absolute ethyl alcohol, hydrochloric acid, ammonium fluoride and ammonia water. The preparation method comprise the following steps that 1, the attapulgite is processed through ultrasonic treatment and acid treatment for purification; 2, the attapulgite, the tetrabutyl titanate, the acetylacetone and the absolute ethyl alcohol are mixed and stirred to enable the attapulgite to be compounded with titanium dioxide through a sol-gel method; 3, compounds of the attapulgite and the titanium dioxide are put in an ammonium fluoride solution for water-bath immersion treatment at a certain temperature; 4, an immersed compound catalyst is calcined in a muffle furnace, and then the catalyst is prepared. The catalyst can be used for catalyzing conversion of nitrogen oxide in flue gas of a coal-fired power plant, the production cost is low, operation is easy, the efficiency is high, and the greater application value and market prospect are achieved.