A g-c with embedded carbon quantum dots 3 nComposite materials and their preparation methods and applications
A technology of carbon quantum dots and composite materials, which can be used in nanotechnology, luminescent materials, chemical instruments and methods for materials and surface science, etc., which can solve the difficulty of removing, collecting and storing, increasing the occurrence of reverse reactions, and photocatalytically splitting water to produce hydrogen. It can not be implemented on a large scale to achieve the effect of reducing costs, inhibiting the occurrence of reverse reactions, and effectively purifying and storing safely.
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[0042] single layer C 3 The preparation of N comprises the following steps:
[0043] 1), 1,3,5-triamino-2,4,6-trinitrobenzene (TATB) (3.0g, 12mmol) was placed with 10%Pd / C catalyst (0.5g) and anhydrous ethyl acetate Esters (150 mL) in a high pressure hydrogenation vessel. The reaction mixture was heated under hydrogen (H 2 ) atmosphere (4.2 bar) until the yellow TATB suspension completely disappeared.
[0044] II), concentrated HCl (100mL) is added in the reaction vessel, and in H 2 (4.2 bar) for a further 5 hours, then the reaction mixture was filtered through celite under reduced pressure to remove the Pd / C catalyst.
[0045] III), After washing the celite with 2M HCl, HAB trihydrochloride crystallized well in quantitative yield. The precipitate was collected by suction filtration using a polytetrafluoroethylene (PTFE) membrane (0.45 μm), and dried under reduced pressure at 70° C. overnight. To form high-quality single crystals, the white crystals (2.5 g) were redissol...
Embodiment 1
[0063] Preparation of monolayer g-C 3 N:
[0064] (1) Place 1,3,5-triamino-2,4,6-trinitrobenzene (TATB) (3.0g, 12mmol) in a mixture of 10% Pd / C (0.5g) and anhydrous ethyl acetate (150mL) high-pressure hydrogenation vessel. The reaction mixture was heated under hydrogen (H 2 ) atmosphere (4.2 bar) until the yellow TATB suspension disappeared completely.
[0065] (2) Add concentrated HCl (100mL) to the reaction vessel, and 2 (4.2 bar) and further stirred for another 5 hours. The reaction mixture was then filtered through celite under reduced pressure to remove the Pd / C catalyst.
[0066] (3) After washing Celite with 2M HCl, HAB trihydrochloride crystallized well in quantitative yield. The precipitate was collected by suction filtration using a polytetrafluoroethylene (PTFE) membrane (0.45 μm), and dried under reduced pressure at 70° C. overnight. To form high-quality single crystals, the white crystals (2.5 g) were redissolved in deionized and degassed water (15 mL), fil...
Embodiment 2
[0071] Preparation of carbon quantum dots:
[0072] (1) The organic precursor orange juice undergoes a one-step hydrothermal reaction in a hydrothermal reactor at a high temperature, with a reaction temperature of 180°C and a reaction time of 12 hours, to obtain a mixed solution containing carbon nanodots;
[0073] (2) Separating, purifying, and drying the above mixed solution to obtain carbon nanodots.
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