Method for preparing selenide ferrous iron nanometer flower
A technology for ferrous selenide and nanoflowers, which is applied in the fields of nanomaterials and electrochemistry, can solve the problems of unfavorable large-scale industrial production, high requirements for synthesis instruments, and high synthesis temperature, and achieves reduced energy consumption, low synthesis temperature, and repeatability. Good results
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Embodiment 1
[0023] Ferrous selenide (FeSe 2 ) the preparation method of nano flower, it comprises the steps:
[0024] 1) Dissolve 0.1 mol of selenium powder in 100 mL of deionized water to obtain a selenium solution; then add the selenium solution and 0.1 mol of sodium sulfite into a dilute ammonia solution with pH = 11, heat to 90°C and stir for 2 hours to obtain Na 2 SeSO 3 solution, spare;
[0025] 2) Add 10 g of polyvinyl alcohol into 100 mL of distilled water (the average degree of polymerization of polyvinyl alcohol is 124), heat to 90°C and stir for 2 hours to obtain an aqueous solution of polyvinyl alcohol, which is set aside;
[0026] 3) 2.5mmol FeC 2 o 4 , add 5ml of 1M citric acid, 25mL of Na 2 SeSO 3 solution and 25mL polyvinyl alcohol aqueous solution, stir until the solution is uniform, and finally adjust the pH value of the system to 9 with dilute hydrochloric acid and dilute ammonia water to obtain a uniform rheological phase substance;
[0027] 4) Move the rheologi...
Embodiment 2
[0035] Ferrous selenide (FeSe 2 ) the preparation method of nano flower, it comprises the steps:
[0036] 1) Dissolve 0.1 mol of selenium powder in 100 mL of deionized water to obtain a selenium solution; then add the selenium solution and 0.1 mol of sodium sulfite into a dilute ammonia solution with pH = 11, heat to 90°C and stir for 2 hours to obtain Na 2 SeSO 3 solution, spare;
[0037] 2) Add 10g of polyvinyl alcohol into 100mL of distilled water, heat to 90°C and stir for 2 hours to obtain an aqueous solution of polyvinyl alcohol, which is set aside;
[0038] 3) 2.5mmol FeC 2 o 4 , add 5ml of 1M citric acid, 20mL of Na 2 SeSO 3 solution and 30mL polyvinyl alcohol aqueous solution, stir until the solution is uniform, and finally adjust the pH value of the system to 9 with dilute hydrochloric acid and dilute ammonia water to obtain a uniform rheological phase substance;
[0039] 4) Move the rheological phase substance obtained in step 3) into a 100mL polytetrafluoroe...
Embodiment 3
[0043] Ferrous selenide (FeSe 2 ) the preparation method of nano flower, it comprises the steps:
[0044] 1) Dissolve 0.1 mol of selenium powder in 100 mL of deionized water to obtain a selenium solution; then add the selenium solution and 0.1 mol of sodium sulfite into a dilute ammonia solution with pH = 11, heat to 90°C and stir for 2 hours to obtain Na 2 SeSO 3 solution, spare;
[0045] 2) Add 10g of polyvinyl alcohol into 100mL of distilled water, heat to 90°C and stir for 2 hours to obtain an aqueous solution of polyvinyl alcohol, which is set aside;
[0046] 3) 2.5mmol FeC 2 o 4 , add 5ml of 1M citric acid, 30mL of Na 2 SeSO 3 solution and 20mL polyvinyl alcohol aqueous solution, stir until the solution is uniform, and finally adjust the pH value of the system to 10 with dilute hydrochloric acid and dilute ammonia water to obtain a uniform rheological phase substance;
[0047] 4) Move the rheological phase substance obtained in step 3) into a 100mL polytetrafluoro...
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