Using chemical precipitation, get some titanium dioxide powder to dip in silver-ammonia solution. Then add oxydol for the reducing reaction. After the reaction, wash it and make it desiccate by certain time in the certain temperature. Finally, the titanium dioxide photocatalyst with silver loading can be acquired.
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Fe3O4 was prepared by using chemical precipitation in dealing with chromium residue simultaneously.
利用化学共沉淀法，在处理铬渣的同时，制备四氧化三铁。
In this paper, preparation processes of amorphous silica using Henan Zr-containing silica residue as raw materials with chemical precipitation and direct neutralization methods were researched.
本论文以河南锆硅渣为原料，研究了分别采用化学沉淀法和直接中和法制备白炭黑的技术和工艺。
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