Method of catalytically and ultrasonically degrading organic dye gold orange II by using semiconductor material magnesium tungstate
A technology of organic dyes and ultrasonic degradation, applied in chemical instruments and methods, water pollutants, water treatment of special compounds, etc., to achieve the effect of good crystallization, high purity, and wide application range
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[0030] (1) MgWO 4 The preparation method comprises the following steps:
[0031] Step 1: According to a certain ratio, mix 1mol L - 1 MgCl 2 Add the solution into the beaker, stir, and add 1mol·L - 1 Na 2 WO 4 , with NaOH or HNO 3 The pH value of the solution was adjusted between 8 and 10, and magnetically stirred for 30 min at room temperature.
[0032] Step 2: Put the solution prepared in Step 1 into a polytetrafluoroethylene-lined autoclave for hydrothermal reaction at 180° C., and naturally cool to room temperature after the reaction.
[0033] Step 3: The product is centrifuged, washed and dried to obtain MgWO 4 powder.
[0034] (2) Using MgWO 4 Steps for ultrasonic catalytic degradation of Golden Orange II:
[0035] Step 1: Take 80 mL of Golden Orange II solution with a certain concentration (including 10-30 mg / L), add an accurately weighed certain amount (0.5-1.5 g / L) of nano-MgWO 4 powder, stirred magnetically for 30 min in the dark.
[0036] Step 2: After ...
Embodiment 1
[0039] wxya 4The experiment on the degradation rate of Golden Orange II was carried out at the addition of 1 g / L, the ultrasonic irradiation time was 120 min, the concentration of Golden Orange II was 10 mg / L, the pH of the solution was 7, and the power of the ultrasonic device was 200 W . Take 80 mL of 10 mg / L golden orange II solution, add a certain amount of 1 g / L nanometer MgWO 4 powder, stirred magnetically for 30 min in the dark. After the suspension was irradiated by ultrasound for 2 hours, the sample was centrifuged and the supernatant was taken. The degradation rate of Jincheng II was 98.47%.
Embodiment 2
[0041] wxya 4 The experiment on the degradation rate of Golden Orange II was carried out at the addition of 1 g / L, the ultrasonic irradiation time was 120 min, the concentration of Golden Orange II was 25 mg / L, the pH of the solution was 7, and the power of the ultrasonic device was 200 W . Take 80 mL of 25 mg / L golden orange II solution, add a certain amount of 1 g / L nano-MgWO 4 powder, stirred magnetically for 30 min in the dark. After the suspension was irradiated by ultrasound for 2 hours, the sample was centrifuged and the supernatant was taken. The degradation rate of Jincheng II was 89.12%.
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