Preparation of Ni-doped stannic oxide formaldehyde sensitive composite material based on ZIF-8 metal organic framework template, product and application

[0029] A Ni-doped tin dioxide formaldehyde-sensitive composite material based on ZIF-8 metal-organic framework template, using ZIF-8 metal-organic framework material as crystallization template, thiourea decomposition under ethylene glycol solvothermal conditions provides S2-, and generates SnS 2 and NiS precursor, by adjusting the calcination temperature and calcination time of the precursor, the Ni-doped SnO based on the ZIF-8 metal organic framework template was prepared 2 The formaldehyde-sensitive ternary composite material is prepared according to the following steps:

[0030] (1) Measure 50mL of N-N dimethylformamide (DMF) and 100mL of methanol with a concentration of 2wt% into the flask, and stir evenly;

[0031] (2) 0.8g zinc nitrate hexahydrate (Zn(NO) 3 ·6H 2 (2) and 0.1g 2-methylimidazole (2-MI) are put into the flask, fully stirred at room temperature;

[0032] (3) Transfer the solution in the flask to a beaker, react completely in an oven at 100°C, take the prec

[0038] A Ni-doped tin dioxide formaldehyde-sensitive composite material based on ZIF-8 metal-organic framework template, similar to Example 1, prepared as follows:

[0039] (1) Measure 30mL of N-N dimethylformamide (DMF) and 60mL of methanol with a concentration of 2wt% into the flask, and stir evenly;

[0040] (2) 0.9g zinc nitrate hexahydrate (Zn(NO) 3 ·6H 2 (2) and 0.2g 2-methylimidazole (2-MI) are put into the flask, fully stirred at room temperature;

[0041] (3) Transfer the solution in the flask to a beaker, react completely in an oven at 100°C, take the precipitate, wash and dry it to obtain ZIF-8 powder;

[0042] (4) Put 0.3g dried ZIF-8 powder into 100mL ethylene glycol ((CH 2 Oh) 2 ), while adding 0.15g nickel chloride hexahydrate (NiCl 2 ·6H 2 O), 1.5g stannous chloride dihydrate and 1.3g thiourea (NH 2 CSNH 2 ), stir evenly;

[0043] (5) Transfer the uniformly stirred solution to a polytetrafluoroethylene reactor, react in an oven at 160°C for 24 hours, take

[0047] A Ni-doped tin dioxide formaldehyde-sensitive composite material based on ZIF-8 metal-organic framework template, similar to Example 1, prepared as follows:

[0048] (1) Measure 40mL of N-N dimethylformamide (DMF) and 80mL of methanol with a concentration of 2wt% into the flask, and stir evenly;

[0049] (2) 1.0g zinc nitrate hexahydrate (Zn(NO) 3 ·6H 2 (2) and 0.3g 2-methylimidazole (2-MI) are put into the flask, fully stirred at room temperature;

[0050] (3) Transfer the solution in the flask to a beaker, react completely in an oven at 100°C, take the precipitate, wash and dry it to obtain ZIF-8 powder;

[0051] (4) Put 0.3g dried ZIF-8 powder into 100mL ethylene glycol ((CH 2 Oh) 2 ), while adding 0.2g nickel chloride hexahydrate (NiCl 2 ·6H 2 O), 2.0g stannous chloride dihydrate and 1.5g thiourea (NH 2 CSNH 2 ), stir evenly;

[0052] (5) Transfer the uniformly stirred solution to a polytetrafluoroethylene reactor, react in an oven at 180°C for 24 hours, take