With Refueling Roasting Preparation Of Bentonite Modification Of Tio <sub> 2 </ Sub>-ag-modified Bentonite Composite Photocatalyst

Bentonite and TiO₂ photocatalyst are causing the people's more attention because of the cheep cast, good stability etc. In our country the resources of natural bentonite and TiO₂ are abundant. Develop the modified bentonite and TiO₂ as water precessing to have the extensively applied foreground.In the experiment, a kind of TiO₂-Ag-modified bentonite composite catalyst was studied. It will not result in the pollution to environment. The experiment raise bentonite's adsorbs function by add crude oil to roasted, and use this modified bentonite loaded TiO₂ and Ag to make a composite photocatalyst. This composite photocatalyst comparison with modified bentonite or TiO₂ have stronger absorb ability, need shorter absorb time and smaller quantity and sink more easily. It can't result in the enviment pollution and can recover. It is worthy to expanding the usage strongly.Experiment indicate: (1)Roasting the bentonite with crude oil to charge it's character can enlarge the ratio surface, change surface structure, and raise the absorb ability to pollutant. (2)Make the best conditions of modify: reaction tempetration: 400 ℃ ;Reaction time: 80min; crude oil quantity. 3%. (3)The key of enhance the efficiency of photocatalyst is its preparation. Augment is facies, improve its ability of adsorption can make. (4)The choice of pH affect to the processing result very qreatly, consider the cost and processing resuit choice pH=3～4. (5)The photocatalyst depends on the degree to the ray low.it lowered the cost. (6)When degrading printing and artesian well waste water.benign effect can be attained.