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Preparation method of cobalt carbonate composite bismuth carbonate photocatalyst

A technology of photocatalyst and cobalt carbonate, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve problems that need to be improved

Inactive Publication Date: 2017-06-20
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the limitation of its own characteristics, the performance of cobalt carbonate needs to be improved in terms of photocatalytic degradation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Take by weighing 16mmol cobalt nitrate, configure it into a 12mmol / L cobalt nitrate solution, weigh 8mmol sodium carbonate, configure it into a 16mmol / L sodium carbonate solution; mix the above two solutions at a speed of 350 rpm to form a gel The substance was continuously stirred for 3 hours, and sodium carbonate and cobalt nitrate reacted during the stirring process to generate cobalt carbonate colloid; the cobalt carbonate colloid was placed in a semi-permeable membrane bag, washed 3 times with distilled water to remove free ions, and then the cobalt carbonate colloid was The colloid was added to 60 mL of bismuth nitrate solution with a concentration of 0.1 mol / L, soaked for 8 days, and bismuth carbonate nanoparticles were formed on the surface of cobalt carbonate particles, separated from solid and liquid, washed with deionized water twice, and dried at 75°C to obtain A cobalt carbonate composite bismuth carbonate photocatalyst.

[0013] Add 0.5 g of the obtained c...

Embodiment 2

[0015] Take by weighing 12mmol cobalt nitrate, be configured into a 12mmol / L cobalt nitrate solution, weigh 6.6mmol sodium carbonate, and be configured into a 16mmol / L sodium carbonate solution; the above two solutions are mixed at a speed of 400 rpm to form a gel Stir continuously for 4 hours, during the stirring process, sodium carbonate and cobalt nitrate react to generate cobalt carbonate colloid; place cobalt carbonate colloid in a semi-permeable membrane bag, wash 4 times with distilled water, remove free ions, and then the carbonic acid colloid Cobalt colloid was added to 80 mL of bismuth nitrate solution with a concentration of 0.3 mol / L, soaked for 6 days, bismuth carbonate nanoparticles were formed on the surface of cobalt carbonate particles, solid-liquid separation was performed, the solid was washed with deionized water for 3 times, and dried at 105 ° C to prepare A cobalt carbonate composite bismuth carbonate photocatalyst was obtained.

[0016] Add 0.5 g of the ...

Embodiment 3

[0018] Take by weighing 14mmol cobalt nitrate, configure it into a 12mmol / L cobalt nitrate solution, weigh 7mmol sodium carbonate, configure it into a 16mmol / L sodium carbonate solution; mix the above two solutions at a speed of 400 rpm to form a gel The substance was continuously stirred for 4 hours. During the stirring process, sodium carbonate and cobalt nitrate reacted to generate cobalt carbonate colloid; the cobalt carbonate colloid was placed in a semi-permeable membrane bag, washed 4 times with distilled water to remove free ions, and then the cobalt carbonate colloid was The colloid was added to 70 mL of bismuth nitrate solution with a concentration of 0.2 mol / L, soaked for 10 days, and bismuth carbonate nanoparticles were formed on the surface of cobalt carbonate particles, separated from solid and liquid, washed with deionized water for 3 times, and dried at 95°C to obtain A cobalt carbonate composite bismuth carbonate photocatalyst.

[0019] Add 0.5 g of the obtain...

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Abstract

The invention discloses a preparation method of a cobalt carbonate composite bismuth carbonate photocatalyst. The preparation method concretely comprises the following steps: weighing 12-16 mmol of cobalt nitrate, preparing a 12 mmol / L cobalt nitrate solution, weighing 6.6-8 mmol of sodium carbonate, and preparing a 16 mmol / L sodium carbonate solution; mixing the above two solutions at a rotating speed of 350-400 r / min to form a gummy substance, continuously stirring the gummy substance for 3-4 h, and reacting the sodium carbonate with the cobalt nitrate in the stirring process to generate cobalt carbonate colloid; and placing the cobalt carbonate colloid in a semi-permeable membrane bag, washing the cobalt carbonate colloid with distilled water 3-4 times to remove free ions, adding the cobalt carbonate colloid into 60-80 mL of a bismuth nitrate solution with the concentration of 0.1-0.3 mol / L, immersing the colloid for 6-10 d to form bismuth carbonate nano-particles on the surfaces of cobalt carbonate particles, carrying out solid-liquid separation, washing the obtained solid with deionized water 2-3 times, and drying the washed solid at 75-105 DEG C to prepare the cobalt carbonate composite bismuth carbonate photocatalyst. The catalyst is formed on the surface of cobalt carbonate through the method, and is closely combined with a carrier.

Description

technical field [0001] The invention relates to a preparation method of a cobalt carbonate composite bismuth carbonate photocatalyst, belonging to the technical field of sewage treatment in environmental protection. Background technique [0002] Traditional water treatment methods have problems such as low efficiency, high cost, and secondary pollution, and sewage treatment has not been well resolved. The development and application of nanotechnology is likely to completely solve this problem. TiO was discovered in 1972 2 High oxidation activity, good chemical stability, non-toxic to the human body, low cost, no pollution, wide application range, so it is the most important, but TiO 2 The bandgap width is large (such as anatase TiO 2 The forbidden band width Eg=3.2eV), can only absorb the light in the ultraviolet region (wavelength less than 387nm), and the utilization efficiency of solar energy is low. [0003] Semiconductor photocatalysis is one of the most promising a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/232C02F1/30C02F1/32
CPCC02F1/30C02F1/32B01J27/232C02F2305/10C02F2101/308B01J35/39Y02W10/37
Inventor 徐广永赵文昌冯婷
Owner CHANGZHOU UNIV
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