Carbon nitride nanosheet (CNNS) composite pH-sensitive hydrogel with Pizza structure as well as preparation method and application of CNNS composite pH-sensitive hydrogel
A technology of composite hydrogel and sheet carbon nitride, which is applied in chemical instruments and methods, organic compound/hydride/coordination complex catalysts, water pollutants, etc. Small area and other problems, to achieve the effect of convenient recycling and solve recycling problems
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Embodiment 1
[0026] Example 1: Prepare 8wt% acrylic acid solution with distilled water, take 20ml of the solution and place it in a quartz bottle, then seal it and fill it with nitrogen for 40 minutes; place the quartz bottle filled with nitrogen under a UV lamp with a central wavelength of 365nm and a power of 300w, keeping a distance of 18cm , and irradiate for 100min, the polyacrylic acid film can be obtained; pour out the prepared PAA and solution from the quartz bottle, wash and dry the PAA, intercept 0.08g PAA and place it in the bottom of a beaker with a certain specification, add 2ml of distilled water dropwise, and let it stand for 60min; take 15mg- 30mg CNNS was placed in 5ml distilled water, ultrasonically oscillated for 30min, then introduced into the above-mentioned beaker, and left to stand for 10 hours; then suck out the distilled water that had been clarified on the upper layer, and place it in a thermostat at 50°C for 12 hours to confirm the weight and ratio;
[0027] CNNS / ...
Embodiment 2
[0029] Embodiment 2: synthesis process such as figure 1 As shown, compared with Example 1, the experimental parameters only changed the irradiation time under the simulated solar xenon lamp to 50 minutes, and finally a PAM / CNNS / PAA composite pH-sensitive hydrogel with a mass ratio of 6:3:8 could be obtained.
[0030] Combining Examples 1 and 2, it can be known that the mass ratio of PAM / CNNS / PAA can be controlled by changing the reaction time of light under the xenon lamp; (Mass ratio 2:3:8) The swelling ratio is decreasing, and the decrease is small, but its maximum tensile strength is greatly increased to 57.3KPa, which is nearly 6 times the maximum tensile strength of PAA, which is PAM / CNNS / PAA (mass ratio 2:3:8) 1.1 times the maximum tensile strength; 0.17g PAM / CNNS / PAA (mass ratio 6:3:8) at wavelengths above 420nm, optical power density 100 mWcm -2The cycle experiment diagram of the degradation of 30ml (10mg / L) RhB solution under the xenon lamp irradiation of simulated s...
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