polypyrrole/fe 3 o 4 /Graphene composite material and its preparation method and application
A composite material and graphene technology, applied in chemical instruments and methods, water/sludge/sewage treatment, alkali metal compounds, etc., can solve problems such as being vulnerable to corrosion, small adsorption capacity, unstable materials, etc., to achieve improved adsorption Capacity, solve the erosion problem, increase the effect of active sites
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Embodiment 1
[0046] A kind of polypyrrole / Fe 3 o 4 / The preparation method of graphene composite material, comprises the following steps.
[0047] (1) Preparation of graphene oxide:
[0048] Slowly add 10g of graphite and 5g of sodium nitrate into a flask containing 230ml of concentrated sulfuric acid, and stir the flask containing the three substances in the ice-water mixture. After stirring for 30 min, slowly add 30g of potassium permanganate into the flask, During the stirring process, control the reaction temperature to always be less than 15°C; after stirring for 90 minutes, transfer the flask to a constant temperature water bath at 35°C, add 460 mL of deionized water to the flask, control the reaction temperature at 80°C to 95°C, and stir The time is 30min; then add 100mL, 30wt% hydrogen peroxide solution to the flask, after the solution in the flask turns bright yellow, filter while hot to get the filter residue, and filter the filter residue with 500mL concentration of 5% (v / v )...
Embodiment 2
[0058] Example 2: To investigate the influence of pH value on the adsorption effect in chromium-containing wastewater.
[0059] Experimental group: using polypyrrole / Fe 3 o 4 / Graphene composite material is adsorbent, in the application of removing the chromium in waste water, specific application method comprises the following steps:
[0060] (1) Take chromium-containing wastewater with an initial concentration of chromium of 48.4 ppm, and divide it into 6 groups on average, and add the polypyrrole / Fe of the above-mentioned Example 1 to each group of chromium-containing wastewater according to the dosage of 0.25 g / L 3 o 4 / graphene composite material;
[0061] (2) Adjust the pH values of each group of wastewater to 3.00, 3.99, 4.86, 6.10, 8.1, and 9.91, and disperse the above-mentioned chromium-containing wastewater by ultrasonic for 10 to 15 minutes, then perform an oscillation reaction. The reaction temperature of each group of wastewater Both are at 303 K, the shaki...
Embodiment 3
[0066] Embodiment 3: investigate polypyrrole / Fe 3 o 4 / Graphene Adsorption Specificity for Heavy Metal Chromium in Wastewater.
[0067] Utilize the polypyrrole / Fe that makes in the embodiment 1 3 o 4 / graphene composite material to remove chromium in wastewater, the specific steps include:
[0068] (1) the polypyrrole / Fe of embodiment 1 3 o 4 / graphene composite material is divided into 16 parts, and then according to the amount of adsorbent is 0.25 g / L to add 16 groups of chromium in the chromium-containing wastewater whose initial concentration of chromium is 48.4 ppm;
[0069] (2) Divide the 16 groups of chromium-containing wastewater into four parts, and add NaCl concentrations of 0 mol / L, 0.1 mol / L, 0.5 mol / L, and 1 mol / L to one part of the wastewater, named A1 and A2 , A3, A4; KCl with concentrations of 0 mol / L, 0.1 mol / L, 0.5 mol / L, and 1 mol / L were added to the second waste water, named B1, B2, B3, B4; the third CaCl concentrations of 0 mol / L, 0.1 mol / L, 0.5 m...
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