Silver phosphate/graphene/silver nanocomposite and preparation method thereof
A technology of graphene nanosheets and composite materials, which is applied in the field of nanocomposite materials and photocatalysis, can solve the problems of poor stability and low photocatalytic efficiency, and achieve the effects of improving stability, improving photoelectric conversion efficiency, and inhibiting photocorrosion
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Embodiment 1
[0019] Take 25 mg of graphene oxide and dissolve it in 50 ml of deionized water, and obtain a graphene oxide dispersion with a concentration of 0.5 mg / ml after ultrasonic dispersion; weigh 0.0711 g of disodium hydrogen phosphate solid and dissolve it in deionized water, and after ultrasonic dispersion is uniform Obtain a disodium hydrogen phosphate solution with a concentration of 0.01 mol / L; weigh 0.3397 g of silver nitrate solid and dissolve it in the above graphene oxide dispersion, wherein the concentration of silver nitrate is 0.04 mol / L, and obtain a precursor solution after magnetic stirring A. Slowly add 50ml of the above-mentioned disodium hydrogen phosphate solution to 50ml of precursor solution A under continuous magnetic stirring and dark conditions. After the addition is completed, the mixed solution is stirred at room temperature for 0.5 hours, and the precipitate is centrifuged. After separation, use deionized water and absolute ethanol to repeatedly centrifuge a...
Embodiment 2
[0022] Take 25 mg of graphene oxide and dissolve it in 50 ml of deionized water, and obtain a graphene oxide dispersion with a concentration of 0.5 mg / ml after ultrasonic dispersion; weigh 0.3555 g of disodium hydrogen phosphate solid and dissolve it in deionized water, and after ultrasonic dispersion is uniform Obtain a disodium hydrogen phosphate solution with a concentration of 0.05 mol / L; weigh 1.6985 g of silver nitrate solid and dissolve it in the above graphene oxide dispersion, wherein the concentration of silver nitrate is 0.2 mol / L, and obtain a precursor solution after magnetic stirring A. Slowly add 50 ml of the above-mentioned disodium hydrogen phosphate solution to 50 ml of precursor solution A under continuous magnetic stirring and dark conditions. After the addition is completed, the mixed solution is stirred at room temperature for 1 hour, and the precipitate After centrifugation, wash with deionized water and absolute ethanol several times, and dry in vacuum; ...
Embodiment 3
[0025] Take 25 mg of graphene oxide and dissolve it in 50 ml of deionized water, and obtain a graphene oxide dispersion with a concentration of 0.5 mg / ml after ultrasonic dispersion; weigh 0.7107 g of disodium hydrogen phosphate solid and dissolve it in deionized water, and after ultrasonic dispersion is uniform Obtain a disodium hydrogen phosphate solution with a concentration of 0.1 mol / L; weigh 3.397 g of silver nitrate solid and dissolve it in the above graphene oxide dispersion, wherein the concentration of silver nitrate is 0.4 mol / L, and obtain a precursor solution after magnetic stirring A. Slowly add 50ml of the above-mentioned disodium hydrogen phosphate solution to 50ml of precursor solution A under continuous magnetic stirring and dark conditions. After the addition is completed, the mixed solution is stirred at room temperature for 2 hours, and the precipitate is centrifuged. Afterwards, wash with deionized water and absolute ethanol several times by centrifugation...
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