55results about How to "Effective catalytic degradation" patented technology

The invention belongs to the technical field of photocatalysts, and particularly relates to a rod-like g-C3N4@SnIn4S8 composite photocatalyst and a method for preparing the same. The method for synthesizing the rod-like g-C3N4@SnIn4S8 composite photocatalyst by the aid of hydrothermal processes includes calcining urea at the high temperatures to obtain pure g-C3N4; weighing the g-C3N4, dissolvingcrystallized tin tetrachloride (SNCl4.5H2O) in deionized water, carrying out ultrasonic treatment, adding quantitative indium nitrate hydrate [In(NO3)3.5H2O] and thioacetamide (C2H5NS) into the deionized water, stirring the indium nitrate hydrate [In(NO3)3.5H2O], the thioacetamide (C2H5NS) and the deionized water to obtain mixtures, transferring the mixtures into a reaction kettle and keeping thetemperatures of the mixtures in a drying oven constant; carrying out negative-pressure suction filtration after reaction is completely carried out and washing and drying reaction products to obtain samples. The urea is a raw materials for the rod-like g-C3N4@SnIn4S8 composite photocatalyst. The rod-like g-C3N4@SnIn4S8 composite photocatalyst and the method have the advantages that the rod-like g-C3N4@SnIn4S8 composite photocatalyst prepared by the aid of the method is mainly applied to photocatalysis, gas adsorption and separation, chemical sensors and the like; the method is simple and is easy to operate, low in cost and free of pollution, and accordingly the rod-like g-C3N4@SnIn4S8 composite photocatalyst and the method have excellent application prospects in the technical field of environmental pollution control.

The invention relates to a regenerating method of organic waste water by adoption of an enzyme-mimic magnetic catalyst. According to the technical scheme, the method includes adding an inorganic acid into the organic waste water fed into a vortex mixer (1), adjusting pH to 3.5-6, feeding the acidified organic waste water after pH adjustment into a catalytic degradation reactor (2), adding the enzyme-mimic magnetic catalyst into the catalytic degradation reactor (2) containing the acidified organic waste water, adding H2O2 with the mass ratio of the enzyme-mimic magnetic catalyst to the H2O2 being 1:1-4.5, stirring at 20-30 DEG C with air blowing by an air blower (3) for 60-120 min to obtain suspension, allowing the suspension to flow automatically into a catalyst separation column (4), allowing the suspension to stand for 10-30 min under the action of a magnetic field, returning the enzyme-mimic magnetic catalyst in the lower layer to the catalytic degradation reactor (2) through a return pipe (5) to be reutilized, and using the supernatant liquid as industrial reclaimed water. The method has characteristics of simple process, high operationality, low investment, low operation cost, low running cost, and wide COD ranges of treated water.

The invention discloses a preparation method and application of MnTiO3 and F-MnTiO3. According to a hydro-thermal synthesis method which is taken as the preparation method, titanate nanowires are taken as a Ti source, MnCl2 is taken as a Mn source, NaF is taken as an F source; the hydro-thermal synthesis method can be used for preparing the MnTiO3 and the F-MnTiO3 which are uniform in feature and diameter and of sheet-shaped structures on the condition of adding NaOH; and the MnTiO3 and the F-MnTiO3 are catalyzed and degraded to obtain organic dyestuff named rhodamine B under the irradiation of visible light. The MnTiO3 and the F-MnTiO3 both have catalytic degradation performance under visible light, and the F-MnTiO3 has higher catalytic performance than the MnTiO3 since an F element is doped in the F-MnTiO3 material, wherein F is an element with greatest electronegativity and can be combined with photoproduction electrons to restrain the combination of the photoproduction electrons and electron holes and further improve the photocatalytic efficiency of visible light. The preparation method provided by the invention is safe and rapid and is high in stability.