A silicon-based photocatalytic magnetic molecular imprinting material and its preparation method

Abstract

The invention discloses a silicon based photocatalytic magnetic molecularly imprinted material and a preparation method thereof. The molecularly imprinted material is silicon based photocatalytic magnetic molecularly imprinted material nano-powder prepared by the steps of: subjecting ammonium hexafluorotitanate, boric acid, ammonium fluosilicate, oxytetracycline, 1-5% of FeCl2, FeCl3, potassium sodium tartrate and sodium hydroxide of certain weight and order to chemical reaction synthesis, and then conducting washing, centrifugation, drying, and low-temperature calcinations, etc. The silicon based photocatalytic magnetic molecularly imprinted material provided by the invention can accurately capture trace oxytetracycline in the water environment and perform catalytic degradation, at the same time has the characteristics of high recovery rate, difficult decomposition and environmental friendliness, and has a good removal effect on trace antibiotics existing in the water environment.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a silicon-based photocatalytic magnetic molecular imprinting material and a preparation method thereof. Background technique [0002] Today's environmental pollution is becoming more and more serious, and water pollution is even more related to the national economy and people's livelihood. The country is also paying more and more attention to the prevention and control measures of water pollution. A variety of refractory organic pollutants, such as antibiotic pollutants, were detected in the effluent of urban sewage treatment plants. This is because the sewage treatment process currently applied is mainly aimed at the removal of COD, nitrogen and phosphorus pollutants. Although the traditional urban sewage treatment process can remove refractory organics to a certain extent, its removal rate is not high, especially the removal of trace refractory organi...

AI Technical Summary

Problems solved by technology

Although the traditional urban sewage treatment process can remove refractory organics to a certain extent, its removal rate is not high, especially the removal of trace refractory organics has certain problems, and most refractory organics are polluted by physical and chemical adsorption. Adsorption carriers such as activated sludge have not been truly removed, so there is still a certain risk of secondary pollution

The current advanced treatment process to remove toxic pollutants also has limitations to varying degrees: the adsorption efficiency of activated carbon on toxic pollutants is affected by natural organic matter, pH and temperature in water, resulting in competitive adsorption; The removal of toxic pollutants has a certain effect, which mainly depends on the physical and chemical properties of toxic pollutants, the characteristics of the membrane, and the operating conditions of the membrane; although the microbial treatment method is low in cost, it has a long cycle and a long period of time for the degradation of highly toxic pollutants. It does not have the weakness of anti-toxicity and is easily restricted by environmental factors; some advanced oxidation technologies can completely remove highly toxic pollutants in theory, but because the reaction process of these methods is relatively complicated and has no selectivity, the removal effect is not obvious

However, there are no reports on water treatment materials that can efficiently, sensitively, and specifically capture trace pollutants in wastewater and remove them, with high recovery rates and strong repeatability.