Three-dimensional titanium carbide/eosin hydrogel photocatalysis composite material taking graphene as supporting skeleton and preparation method and application thereof
A technology of three-dimensional titanium carbide and supporting skeleton, which is applied in the field of materials, can solve the problems of easy stacking of nanosheets, excellent performance cannot be fully and effectively exerted, and achieve high photocatalytic performance, which is conducive to sustainable development and high photocatalytic activity. Effect
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[0020] A method for preparing a three-dimensional titanium carbide / red hydrogel photocatalytic composite material with graphene as a supporting framework, comprising the following steps:
[0021] (1) Preparation of graphene oxide: Add 230 ml of concentrated sulfuric acid into a 3 L three-necked flask, add 10 g of graphite powder, stir for 5-10 min; then add 30 g of KMnO 4 , continue to stir for 10 min; then 35 ℃ water bath for 2 h; then add 460 mL of water, stir for 5-10 minutes, increase the speed, add 1.4 L of water, stir for 5 min, then increase the speed again; then add 50 mL of over Hydrogen oxidation, continue to stir for 30 minutes, centrifuge, the product is washed with acid and water in sequence, then put the product into a dialysis bag, change the water and dialysis until the ion concentration in the solution is less than 10 ppm, collect the dialysis product, dry at 45 °C, Obtain graphene oxide.
[0022] (2) Preparation of few layers of Ti 3 C 2 : 1 g LiF was diss...
Embodiment 1
[0030] Preparation of three-dimensional titanium carbide / red hydrogel photocatalytic composites
[0031] 4.75 mL, 2 mg / mL of Ti 3 C 2 The solution was mixed with 2.03 mL and 2 mg / mL of GO under stirring conditions, and 2 mL of 0.5 mg / mL EY solution and 48 mg / mL of NaHSO were sequentially added to the above solution 3 The solution was stirred for 30 minutes, followed by nitrogen gas for 10 minutes, and heated at 70°C for 8 hours. The product was washed several times with water to remove residual NaHSO 3 , to obtain a three-dimensional Ti with graphene as the supporting framework 3 C 2 / EY hydrogel, its SEM picture is as follows figure 2 As shown, the TEM image is shown in image 3 As shown, the Raman diagram is as Figure 4 shown.
Embodiment 2
[0033] Photocatalytic degradation of metal ions
[0034] 1. Three-dimensional Ti 3 C 2 Photocatalytic degradation experiment of / EY hydrogel
[0035] The three-dimensional Ti prepared in Example 1 3 C 2 / EY hydrogel was placed in 20 mL of 10 ppm hexavalent chromium solution, darkly adsorbed for 1 hour, and then exposed to nitrogen gas (40 mL / min) for 1 hour, then placed under visible light (>420 nm), and the three-dimensional Ti 3 C 2 The photocatalytic performance of the / EY hydrogel photocatalytic composite material degrades 99.3% hexavalent chromium solution in 10 minutes.
[0036] 2. Ti 3 C 2 Photocatalytic degradation experiment of / EY powder
[0037] The three-dimensional Ti prepared in Example 1 3 C 2 / EY hydrogel was oven-dried and ground to obtain Ti 3 C 2 / EY powder, its SEM picture is as follows Figure 5 shown.
[0038] Ti 3 C 2 / EY powder was placed in 20 mL of 10 ppm hexavalent chromium solution, dark adsorption for 1 hour, nitrogen gas (40mL / min)...
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