Controllable synthesis method for nitrogen and phosphorus co-doped graphitized carbon ball with hollow structure
A technology of hollow structure and synthesis method, applied in the direction of nano-carbon, carbon preparation/purification, nanotechnology for materials and surface science, etc., to achieve cost reduction, easy recycling, and low price
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[0031] Example 1: First, 4.0 g glucose, 0.21 g sodium stannate, and 0.22 g ferric chloride were dissolved in 40 ml deionized water at a molar ratio of 25:1:1, stirred evenly, and transferred to a 50 ml hydrothermal reactor. After reacting at 160°C for 15 hours, the reaction product was filtered and washed with deionized water at 25°C to remove impurities. After the reaction product was vacuum-dried at 70°C for 12 hours, it was placed in a high-temperature tube furnace at 1000°C and heated for 2 hours at a heating rate of 5°C per minute, and the ammonia flow rate was 30 ml per minute. After it was naturally cooled to room temperature, it passed Soaked in 14mol / L phosphoric acid at 90°C for 6 hours to remove tin and iron, a graphitized carbon ball with hollow structure co-doped with nitrogen and phosphorus is obtained. Its outer diameter is 224 nm, inner diameter is 140 nm, and the ratio of outer diameter to inner diameter is 1.6. The shell pore size (0.7 nm, 1.1 nm), the carbon ...
Example Embodiment
[0039] Example 2: First, 4.0 g glucose, 0.21 g sodium stannate, 0.22 g ferric chloride were dissolved in 20 ml deionized water and 20 ml phosphoric acid (phosphoric acid concentration 52%~54% ), stir well and transfer it into a 50ml hydrothermal reactor. After reacting at 160°C for 3 hours, the reaction product is filtered and washed with deionized water at 25°C to remove impurities. After the reaction product was vacuum-dried at 100°C for 4 hours, it was placed in a high-temperature tube furnace at 1000°C and heated for 2 hours at a heating rate of 5°C per minute, and the ammonia flow rate was 30 ml per minute. After being naturally cooled to room temperature, it passed Soaked in 5mol / L phosphoric acid at 90°C for 6 hours to remove tin and iron, a graphitized carbon ball with hollow structure co-doped with nitrogen and phosphorus is obtained. Its outer diameter is 94 nm, inner diameter is 71 nm, and the ratio of outer diameter to inner diameter is 1.3. The shell pore size (0.7...
Example Embodiment
[0040] Example 3: First, 4.0 grams of glucose, 0.21 grams of sodium stannate, 0.22 grams of ferric chloride were dissolved in 10 milliliters of deionized water and 30 milliliters of phosphoric acid (phosphoric acid concentration 52%~54%), with a molar ratio of 25:1:1. ), stir well and transfer it into a 50 ml hydrothermal reactor. After 9 hours of reaction at 160°C, the reaction product is filtered and washed with deionized water at 50°C to remove impurities. After the reaction product was vacuum-dried at 100°C for 4 hours, it was placed in a high-temperature tube furnace at 1000°C and heated for 2 hours at a heating rate of 5°C per minute, and the ammonia flow rate was 30 ml per minute. After being naturally cooled to room temperature, it passed Soaked in 2mol / L phosphoric acid at 90°C for 6 hours to remove tin and iron, a graphitized carbon ball with hollow structure co-doped with nitrogen and phosphorus is obtained. Its outer diameter is 125 nm, inner diameter is 104 nm, and ...
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