A kind of photocatalyst and its preparation method and application
A technology of photocatalyst and treatment method, applied in the field of photocatalysis, which can solve the problems of limited practical application, difficulty in recycling catalysts, high carrier recombination rate, etc., and achieve the effects of low cost, high degradation activity and simple process
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[0015] A method for preparing a photocatalyst, comprising the steps of:
[0016] Add bismuth citrate to ethylene glycol and distilled water to dissolve, add sodium lauryl sulfate during stirring, then react at 180-190°C for 9-10 hours, centrifuge to collect the precipitate, then wash and dry the precipitate Instant (BiO) 4 CO 3 (OH) 2 catalyst of light;
[0017] The total volume of ethylene glycol and distilled water is 60ml, and sodium lauryl sulfate is used as a surfactant to adjust the morphology and specific surface area of the product, and the addition amount is between 0.1g and 2g.
[0018] As can be seen from the above description, the beneficial effects of the present invention are: the present invention adopts one-pot hydrothermal synthesis (BiO) 4 CO 3 (OH) 2 , the process is simple and the cost is low, which provides a new idea for the development of new photocatalysts, and the (BiO) 4 CO 3 (OH) 2 ) is used as a photocatalytic material in the photocatalyt...
Embodiment 1
[0029] (1)(BiO) 4 CO 3 (OH) 2 preparation of
[0030] Add 0.4g of bismuth citrate to 17ml of ethylene glycol and 43ml of distilled water to form a clear solution, add 1g of sodium lauryl sulfate during stirring, and then transfer to 100ml of stainless steel high-pressure reaction with PTFE lining The reaction was carried out at 180°C for 10 hours in the kettle, and the product was centrifuged, washed three times with deionized water and absolute ethanol, and dried at 60°C for 10 hours to obtain (BiO) 4 CO 3 (OH) 2 catalyst of light.
[0031] Such as figure 1 As shown, (BiO) 4 CO 3 (OH) 2 The XRD pattern of the sample shows a group of characteristic peaks, and its diffraction peak position is the same as that of (BiO) with JCPDS card number 00-038-0579 in the standard spectrum library. 4 CO 3 (OH) 2 The characteristic peaks presented by the crystals are consistent, proving that the sample is (BiO) 4 CO 3 (OH) 2 powder.
[0032] (2)(BiO) 4 CO 3 (OH) 2 Use of p...
Embodiment 2
[0036] (1)(BiO) 4 CO 3 (OH) 2 preparation of
[0037]Add 0.8g of bismuth citrate to 30ml of ethylene glycol and 30ml of distilled water to form a clear solution, add 1.5g of sodium lauryl sulfate during stirring, and then transfer to 100ml of stainless steel high-pressure tank with PTFE lining React in the reaction kettle at 190°C for 9 hours, centrifuge the product, wash with deionized water and absolute ethanol for 3 times, and dry at 60°C for 10 hours to obtain (BiO) 4 CO 3 (OH) 2 catalyst of light.
[0038] (2)(BiO) 4 CO 3 (OH) 2 Use of photocatalysts
[0039] Weigh 0.08g(BiO) 4 CO 3 (OH) 2 Add the powder into 80ml of malachite green solution (concentration is 20mg / L), put the suspension in the dark and stir and disperse for 30 minutes to reach the equilibrium of adsorption and desorption, then turn on the ultraviolet light source to make the solution undergo photocatalytic reaction, every interval Take about 4ml of the solution in 10 minutes, use a centrifuge...
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