Preparation method and application of GR/WS2-AuNPs-WS2 compound molecular imprinting sensor
A ws2-aunps-ws2, molecular imprinting technology, applied in the intersection of chemistry and materials, to achieve the effect of simple preparation process, mild conditions, high-sensitivity detection and separation
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Embodiment 1
[0030] Embodiment 1: a kind of GR / WS 2 -AuNPs-WS 2 The preparation method of composite molecularly imprinted sensor, such as figure 1 shown, including the following steps:
[0031] (1) Take 1g of sodium tungstate and 1.2g of thioacetamide, add 30ml of secondary water and mix evenly, stir with a magnetic stirrer for 2h, then transfer to a 50mL stainless steel reaction kettle, react at 180°C for 36h, take it out and cool it down naturally Centrifuge at room temperature at 5000r / min, wash with distilled water and absolute ethanol three times in sequence, and dry at 60°C for 12 hours to prepare nanosheet transition metal tungsten disulfide;
[0032] (2) get the tungsten disulfide prepared by 0.1g step (1), 0.2mL 10mg / ml chloroauric acid, 0.5g sodium borohydride, be dissolved in secondary water, add 3mL mass fraction in fume hood and be 25% ammoniacal liquor, Ultrasonic oscillation for 30s, heating in a water bath at 60°C for 3.5 hours, cooling to room temperature, standing stil...
Embodiment 2
[0036] Embodiment 2: a kind of GR / WS 2 -AuNPs-WS 2 A method for preparing a composite molecularly imprinted sensor, comprising the following steps:
[0037] (1) Take 1.2g sodium tungstate and 1.5g thioacetamide, add 30ml of secondary water and mix evenly, stir with a magnetic stirrer for 2h, then transfer to a 50mL stainless steel reaction kettle, react at 200°C for 24h, take it out and cool naturally to room temperature, centrifuged at 5000r / min, washed with distilled water and absolute ethanol four times in sequence, and dried at 60°C for 12 hours to prepare nanosheet transition metal tungsten disulfide;
[0038] (2) Take 0.2g tungsten disulfide, 0.3mL 10mg / ml chloroauric acid, 0.5g sodium borohydride, dissolve in secondary water, add 3mL ammonia water with a mass fraction of 27% in the fume hood, ultrasonically oscillate for 50s, 60℃ Heated in a water bath for 3.5 hours under the same conditions, cooled to room temperature, stood still, filtered with suction, took the fil...
Embodiment 3
[0043] A GR / WS 2 -AuNPs-WS 2 A method for preparing a composite molecularly imprinted sensor, comprising the following steps:
[0044] (1) Take 1.5g sodium tungstate and 2.0g thioacetamide, add 30ml of secondary water and mix evenly, stir with a magnetic stirrer for 2h, then transfer to a 50mL stainless steel reaction kettle, react at 200°C for 36h, take it out and cool naturally to room temperature, centrifuged at 5000r / min, washed with distilled water and absolute ethanol for 5 times, and dried at 65°C for 12 hours to prepare nanosheet transition metal tungsten disulfide;
[0045] (2) Take 0.1g tungsten disulfide, 0.2mL 10mg / ml chloroauric acid, 0.6g sodium borohydride, dissolve in secondary water, add 4mL ammonia water with a mass fraction of 28% in the fume hood, ultrasonically oscillate for 30s, 60°C Heated in a water bath under the conditions for 3.5 hours, cooled to room temperature, stood still, filtered with suction, took the filter cake, and dried it in vacuum at -...
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