陶瓷釉用TiO_2光催化剂的制备研究

Preparation and Characterization of TiO_2 Photocatalyst for Ceramic Glaze

制备了SiO2-TiO2和SiO2-ZrO2-TiO2复合光催化剂,并将其加入到陶瓷釉料中,结果表明,SiO2-TiO2,SiO2-ZrO2-TiO2复合粉体经1 323 K煅烧后仍具有较好的光催化活性;但用SiO2改性的TiO2粉体添加到陶瓷釉料中,经1 323 K煅烧后,由于釉料中碱金属及碱土金属等离子的侵蚀,TiO2全部转变为金红石相,所制得的陶瓷釉料不具有光催化活性;而采用ZrO2-SiO2共同改性TiO2粉体添加到陶瓷釉料中,经1 323 K煅烧后,TiO2基本上仍以锐钛矿相存在,所制得的陶瓷釉料具有良好的光催化活性;最后对改性TiO2粉体和光催化釉料的光催化机理进行了讨论。

SiO2-TiO2 and SiO2-ZrO2-TiO2 photocatalyst was prepared and used in ceramic glaze.SiO2-TiO2 and SiO2-ZrO2-TiO2 photocatalyst powder calcined at 1 323 K have well photocatalysis activity.However,after calcination at 1 323 K,ceramic glaze added SiO2-TiO2 photocatalyst powder doesn't have photocatalysis activity for TiO2 had transmitted from the anatase phase to rutile phase under the action of alkali metals and alkaline-earth metals irons,but ceramic glaze added SiO2-ZrO2-TiO2 photocatalyst powder has well photocatalysis activity for TiO2 still exists in ceramic glaze as anatase phase.The photocatalysis mechanism of modified TiO2 photocatalyst powder and photocatalysis ceramic glaze has been discussed.