Phenol-formaldehyde resin-covered necklace-shaped one-dimensional nanomaterial and preparation method as well as application thereof
A nanomaterial and phenolic resin technology, applied in the field of nanomaterial preparation, can solve the problems of expensive devices, low output, and no necklace-like one-dimensional nanostructure, and achieve short reaction time, high specific surface area, and large-scale production. The effect of production
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Embodiment 1
[0034] ①Synthesis of ultrafine tellurium nanowires
[0035] Weigh 0.092g of sodium tellurite and 1g of polyvinylpyrrolidone and dissolve it in 33ml of water, then add 1.65ml of hydrazine hydrate (mass fraction 85%) and 3.35ml of ammonia water (mass fraction of 25-28%), and put the airtight reaction vessel at 180 ° C for 3 hours, and then the product was purified with acetone to obtain a necklace-shaped one-dimensional nanomaterial coated with phenolic resin, which was then dissolved in 100ml of water for use.
[0036] ②Synthesis of necklace-like tellurium wire / phenolic resin one-dimensional nano-optical cable
[0037] Weigh 0.002mol of hexamethylenetetramine into 8ml of 0.1mol / L phenol solution, then add 20ml of prepared tellurium nanowire aqueous solution (about 0.084mmol) and add water to a total volume of 35ml, stir to dissolve, and dissolve the above solution Sealed in a reaction vessel, reacted at 160°C for 4 hours, washed the product three times with water and ethanol t...
Embodiment 2
[0044] Weigh 0.002mol of hexamethylenetetramine and dissolve it in 8ml of 0.1mol / L phenol solution, then add 20ml of the tellurium nanowire aqueous solution (about 0.084mmol) prepared in Example 1 and add water to a total volume of 35ml, stir to dissolve , the above solution was sealed in the reaction vessel, reacted at 120 ° C, 140 ° C, 180 ° C, 200 ° C for 4 hours respectively, and the products were all washed with water and ethanol three times to remove impurities, respectively, to obtain the tellurium wires of different shapes / Phenolic resin core-shell nanostructure.
[0045] When the reaction temperature was 120 °C, there was only a thin layer of phenolic resin on the surface of the tellurium nanowires ( figure 2 a); when the reaction temperature is 140 °C, a necklace-like one-dimensional tellurium wire / phenolic resin nanocable structure can also be obtained ( figure 2 b); When the temperature was 180 °C, the increase of the reaction temperature made the spherical pro...
Embodiment 3
[0047] Weigh 0.002mol of hexamethylenetetramine and dissolve them in 3ml, 6ml, 8ml, 10ml and 13ml of phenol solution (0.1mol / L) respectively, then add 20ml of the prepared tellurium nanowire aqueous solution (about 0.084mmol) and add water to Total volume is 35ml, stirring and dissolving, above-mentioned solution is sealed in reaction vessel, at 160 DEG C of reaction 4 hours, product is all washed with water and ethanol three times respectively to remove impurities, obtain the tellurium wire / phenolic resin core-shell nanometer of different shapes structure.
[0048] When the phenol content was 3ml and 6ml, a straight tellurium wire / phenolic resin nanocable with almost no spherical protrusions could be obtained ( image 3 a, b); and when the amount of phenol is 8 ml, the aforementioned necklace-shaped one-dimensional nano-optical cable ( image 3 c); When the amount of phenol is 10ml, the diameter of the spherical protrusions in the necklace-like structure will increase, and t...
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