Modified two-dimensional phosphorus as well as preparation method and application thereof

[0031] Example 1

[0032] A modified two-dimensional phosphorus, wherein the surface of the two-dimensional phosphorus is coated with a layer of silica, and the mass ratio of the two-dimensional phosphorus to the coating layer is 1:0.001.

[0033] (1) Preparation of two-dimensional phosphorus:

[0034] ①100g black phosphorous block is added with 100ml dimethylformamide under the protection of argon gas, and it is stripped by 300W high-power ultrasonic with ultrasonic cell disruptor for 10h;

[0035] ② The resulting suspension was centrifuged at 12000r / min for 10min;

[0036] ③ Obtain the supernatant of the solution obtained in the previous step, and further centrifuge at a speed of 18000r / min; the centrifugal time is 20min;

[0037] ④Remove the excess water, and resuspend the obtained two-dimensional nano-phosphorus in 5ml of absolute ethanol; the ratio of two-dimensional nano-phosphorus to ethanol is about (0.5-1): 5;

[0038] ⑤Use TEM (FEI Tecnai G2 F30 transmission electron microscope

[0050] Example 2

[0051] A modified two-dimensional phosphorus, wherein the surface of the two-dimensional phosphorus is coated with a layer of silicon dioxide, and the mass ratio of the two-dimensional phosphorus to the coating layer is 1:0.0005.

[0052] (1) Preparation of two-dimensional phosphorus:

[0053] ① 100g black phosphorous block is added with 100ml dimethylformamide under the protection of argon gas, and it is stripped with 350W high-power ultrasonic with ultrasonic cell disruptor for 8h;

[0054] ②The resulting suspension was centrifuged at a speed of 15000r / min for 8min;

[0055] ③ Obtain the supernatant of the solution obtained in the previous step, and further centrifuge at 20000r / min; the centrifugal time is 15min;

[0056] ④Remove excess water, and resuspend the obtained two-dimensional phosphorous nanosheets in 5ml absolute ethanol;

[0057] ⑤Use TEM (FEI Tecnai G2 F30 transmission electron microscope, 300KV) and AFM (Bruker Dimension Icon) to characterize the two-di

[0067] Example 3

[0068] A modified two-dimensional phosphorus, wherein the surface of the two-dimensional phosphorus is coated with a layer of silicon dioxide, and the mass ratio of the two-dimensional phosphorus to the coating layer is 1:0.0015.

[0069] (1) Preparation of two-dimensional phosphorus:

[0070] ①100g black phosphorous block is added with 100ml dimethylformamide under the protection of argon gas, and it is stripped by 300W high-power ultrasonic with ultrasonic cell disruptor for 10h;

[0071] ②The resulting suspension was centrifuged at 10000r / min for 12min;

[0072] ③ Obtain the supernatant of the solution obtained in the previous step, and further centrifuge at a speed of 15000r / min; the centrifuge time is 25min;

[0073] ④Remove excess water, and resuspend the obtained two-dimensional phosphorous nanosheets in 5ml absolute ethanol;

[0074] ⑤Use TEM (FEI Tecnai G2 F30 transmission electron microscope, 300KV) and AFM ((Bruker Dimension Icon) to characterize the shape a