The sno2/zno nanocomposite fiber material of the same type (n-n) heterogeneous structure and its preparation method and application
A nanocomposite fiber and heterogeneous structure technology, applied in the analysis of materials, fiber processing, material resistance, etc., can solve the problems of large specific surface area of nanoscale powder, response sensitivity less than 6.5, and difficult to meet the requirements of gas sensitivity, to achieve Inexpensive raw materials, good response characteristics and recovery characteristics, novel shape effects
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Embodiment 1
[0035] Two-step method to prepare SnO with homotype (n-n) heterostructure 2 / ZnO Nanocomposite
[0036] (1) Preparation of spinning precursor solution
[0037] Weigh 0.6g SnCl 2 2H 2 Dissolve O in 4ml ethanol, stir magnetically until completely dissolved, the solution is colorless and transparent, weigh 0.5g PVP and 3ml DMF, dissolve it in SnCl 2 After magnetically stirring for 8 hours, a colorless, transparent and viscous spinning precursor solution was formed.
[0038] (2) Preparation of SnO by electrospinning 2 Nanofibers
[0039] The prepared SnO 2 The spinning precursor solution was injected into a 10ml glass needle tube connected with a No. 7 needle, and connected to the electrospinning device. During the spinning process, the spinning precursor solution in the glass needle tube is under the action of a high-voltage electrostatic field, and the positively charged solution at the nozzle forms a "Taylor cone" at the spinneret, and forms a fine jet stream, which move...
Embodiment 2
[0044] (1) Weigh 0.5g SnCl 2 2H 2 Dissolve O in 4ml ethanol, stir magnetically until completely dissolved, the solution is colorless and transparent, weigh 0.8g PVP and 2ml DMF, dissolve it in SnCl 2 In the ethanol solution, after magnetic stirring for 8 hours, a colorless, transparent and viscous spinning precursor solution was formed, and the electrospinning method was used to obtain the SnCl-containing 2 The white paper-like product is calcined with oxygen at 600°C to obtain SnO with a hollow multi-level structure 2 Nanofibers;
[0045] (2) SnO 2 The nanofibers were made into a paste, spin-coated on a glass slide with a thickness of 0.5 mm, dried in a drying oven at 250 ° C for 40 min, and 0.06 mol / L zinc acetate solution was evenly dropped on the SnO 2 On the surface of the fiber, place it in a drying oven at 250°C for 40 minutes; put the dried glass slide in 50ml of 58mmol.L -1 Zinc nitrate (Zn(NO 3 ) 2 ﹒ 6H 2 O) and 58mmol.L -1 Hexamethylenetetramine (C 6 h 1...
Embodiment 3
[0047] (1) Weigh 1.1g SnCl 2 2H 2 Dissolve O in 2.2ml ethanol, stir magnetically until completely dissolved, the solution is colorless and transparent, weigh 1.5g PVP and 2ml DMF, dissolve it in SnCl 2 In the ethanol solution, after magnetic stirring for 8 hours, a colorless, transparent and viscous spinning precursor solution was formed, and the electrospinning method was used to obtain the SnCl-containing 2 The white paper-like product is calcined with oxygen at 600°C to obtain SnO with a hollow multi-level structure 2 Nanofibers;
[0048] (2) SnO 2 The nanofibers were made into a paste, spin-coated on a glass slide with a thickness of 0.1mm, and dried in a drying oven at 200°C for 30 minutes, and 0.02mol / L zinc acetate solution was evenly dropped on the SnO 2 On the surface of the fiber, dry in a drying oven at 250°C for 40 minutes; put the dried glass slide in 50ml of 55mmol.L -1 Zinc nitrate and 55mmol.L -1 In the mixed aqueous solution of hexapetramine, grow in a c...
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