Method for preparing lanthanum yttrium hafnate-based titanium dioxide composite photocatalyst
A composite photocatalyst and titanium dioxide technology, applied in the direction of protection devices against harmful chemicals, etc., can solve the problem of no lanthanum hafnium yttrium-based titanium dioxide composite photocatalyst photocatalyst, etc., and achieve the effects of good photocatalytic performance, good crystallization, and mild conditions.
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[0021] Example
[0022] a. Preparation of lanthanum hafnate and yttrium powder
[0023] With hafnium oxide (HfO 2 , 99.9%) and yttrium oxide (Y 2 O 3 , 99.995%) and lanthanum oxide (La 2 O 3 , 99.99%) as raw materials. The three raw materials are weighed and put into a ball milling tank according to a certain ratio, and then ball milled with absolute ethanol and pure zirconia balls as the medium for 12-20 hours, dried at 70-100°C for 5-10 hours, and passed through a 200-mesh sieve to obtain powder.
[0024] b. Preparation of lanthanum hafnate and yttrium-based titanium dioxide composite photocatalyst
[0025] (1) Weigh a certain amount of titanium tetrachloride (TiCl 4 ) Or titanium tetrafluoride (TiF 4 ) Dissolve in deionized water, then add a certain amount of lanthanum and yttrium hafnate powder, and ultrasonically disperse for 1 hour to make it fully mixed; obtain a suspension; the mass ratio of lanthanum yttrium hafnate to titanium tetrachloride or titanium tetrafluoride 1:8-40;...
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