A kind of preparation method of zno-cuo composite nanomaterial

Abstract

The invention discloses a method for preparing ZnO-CuO composite nanomaterials. The potassium ethylxanthate solution is dropped into a zinc salt solution while stirring, the resulting precipitate is mixed with deionized water, and the ethylxanthogen is obtained after drying. Zinc acid powder; drop the potassium ethylxanthate solution into the copper salt solution while stirring, and dry to obtain copper ethylxanthate powder; mix copper ethylxanthate and zinc ethylxanthate to obtain a powder A. Premix powder A with deionized water; add organic dispersant and inorganic dispersant into the mixed solution, dry and roast, the roasting temperature is 400~500°C, the heating rate is 3~10°C / minute, and the roasting time is 2~5 hours , and then cooled to room temperature to obtain Zn‑CuO composite nanomaterials. The advantages of this method include simple preparation process, low preparation cost, stable performance, good gas selectivity, and broad application prospects.

Description

technical field

[0001] The invention relates to the technical field of composite nanomaterial preparation, in particular to a preparation method of ZnO-CuO composite material. Background technique

[0002] Metal oxides such as ZnO, CuO, SnO 2 、WO 3 Due to the advantages of excellent performance, environmental friendliness, abundant resources, and low price, it has a wide range of applications in many fields, such as gas sensors, solar cell photoanodes, photoelectric water splitting for hydrogen production, photocatalysis, etc. Among them, ZnO and CuO are favored by researchers and industries as excellent gas-sensing materials, but metal oxides respond to most gases. By constructing metal oxides with different structures and crystal forms, the sensitivity, response / Recovery time, etc., but the difficult problem of poor selectivity is difficult to be solved.

[0003] The invention provides a simple method for constructing ZnO-CuO composite nanomaterials to improve the gas-...

Examples

Embodiment 1

[0016] Prepare the aqueous solutions of zinc chloride and potassium ethyl xanthate with a concentration of 0.1 at a molar ratio of 1:1.1, drop the potassium ethyl xanthate solution into the zinc chloride solution while stirring, and continue stirring for half an hour; filter with suction , mix the obtained precipitate with deionized water, stir for a while, filter with suction, repeat 3-5 times, and obtain zinc ethyl xanthate powder after drying; prepare copper chloride and ethyl xanthate powder with a concentration of 0.1M respectively in a molar ratio of 1:1.1 Add the aqueous solution of potassium ethyl xanthate, drop the potassium ethyl xanthate solution into the copper salt solution while stirring, continue to stir for half an hour; filter with suction, mix the resulting precipitate with deionized water, filter with suction, repeat 3-5 times, after drying, copper ethyl xanthate powder is obtained;

[0017] Mix copper ethyl xanthate and zinc ethyl xanthate at a molar ratio ...

Embodiment 2

[0022] Mix the aqueous solutions of zinc chloride and potassium ethyl xanthate with a concentration of 0.3 at a molar ratio of 1:1.5, drop the potassium ethyl xanthate solution into the zinc chloride solution while stirring, and continue stirring for half an hour; filter with suction , mix the obtained precipitate with deionized water, stir for a while, filter with suction, repeat 3-5 times, and obtain zinc ethyl xanthate powder after drying; prepare copper chloride and ethyl xanthate powder with a concentration of 0.3M in a molar ratio of 1:1.5, respectively. Add the aqueous solution of potassium ethyl xanthate, drop the potassium ethyl xanthate solution into the copper salt solution while stirring, continue to stir for half an hour; filter with suction, mix the resulting precipitate with deionized water, filter with suction, repeat 3-5 times, after drying, copper ethyl xanthate powder is obtained;

[0023] Mix copper ethyl xanthate and zinc ethyl xanthate at a molar ratio of...

Embodiment 3

[0028] Prepare the aqueous solutions of zinc chloride and potassium ethyl xanthate with a concentration of 0.2 at a molar ratio of 1:1.3, drop the potassium ethyl xanthate solution into the zinc chloride solution while stirring, and continue stirring for half an hour; filter with suction , mix the resulting precipitate with deionized water, stir for a while, filter with suction, repeat 3-5 times, and obtain zinc ethyl xanthate powder after drying; prepare copper chloride and ethyl xanthate powder with a concentration of 0.2M respectively in a molar ratio of 1:1.3 Add the aqueous solution of potassium ethyl xanthate, drop the potassium ethyl xanthate solution into the copper salt solution while stirring, continue to stir for half an hour; filter with suction, mix the resulting precipitate with deionized water, filter with suction, repeat 3-5 times, after drying, copper ethyl xanthate powder is obtained;

[0029] Mix copper ethyl xanthate and zinc ethyl xanthate at a molar ratio...

technical field

[0001] The invention relates to the technical field of composite nanomaterial preparation, in particular to a preparation method of ZnO-CuO composite material. Background technique

[0002] Metal oxides such as ZnO, CuO, SnO 2 、WO 3 Due to the advantages of excellent performance, environmental friendliness, abundant resources, and low price, it has a wide range of applications in many fields, such as gas sensors, solar cell photoanodes, photoelectric water splitting for hydrogen production, photocatalysis, etc. Among them, ZnO and CuO are favored by researchers and industries as excellent gas-sensing materials, but metal oxides respond to most gases. By constructing metal oxides with different structures and crystal forms, the sensitivity, response / Recovery time, etc., but the difficult problem of poor selectivity is difficult to be solved.

[0003] The invention provides a simple method for constructing ZnO-CuO composite nanomaterials to improve the gas-...

Examples

Embodiment 1

[0016] Prepare the aqueous solutions of zinc chloride and potassium ethyl xanthate with a concentration of 0.1 at a molar ratio of 1:1.1, drop the potassium ethyl xanthate solution into the zinc chloride solution while stirring, and continue stirring for half an hour; filter with suction , mix the obtained precipitate with deionized water, stir for a while, filter with suction, repeat 3-5 times, and obtain zinc ethyl xanthate powder after drying; prepare copper chloride and ethyl xanthate powder with a concentration of 0.1M respectively in a molar ratio of 1:1.1 Add the aqueous solution of potassium ethyl xanthate, drop the potassium ethyl xanthate solution into the copper salt solution while stirring, continue to stir for half an hour; filter with suction, mix the resulting precipitate with deionized water, filter with suction, repeat 3-5 times, after drying, copper ethyl xanthate powder is obtained;

[0017] Mix copper ethyl xanthate and zinc ethyl xanthate at a molar ratio ...

Embodiment 2

[0022] Mix the aqueous solutions of zinc chloride and potassium ethyl xanthate with a concentration of 0.3 at a molar ratio of 1:1.5, drop the potassium ethyl xanthate solution into the zinc chloride solution while stirring, and continue stirring for half an hour; filter with suction , mix the obtained precipitate with deionized water, stir for a while, filter with suction, repeat 3-5 times, and obtain zinc ethyl xanthate powder after drying; prepare copper chloride and ethyl xanthate powder with a concentration of 0.3M in a molar ratio of 1:1.5, respectively. Add the aqueous solution of potassium ethyl xanthate, drop the potassium ethyl xanthate solution into the copper salt solution while stirring, continue to stir for half an hour; filter with suction, mix the resulting precipitate with deionized water, filter with suction, repeat 3-5 times, after drying, copper ethyl xanthate powder is obtained;

[0023] Mix copper ethyl xanthate and zinc ethyl xanthate at a molar ratio of...

Embodiment 3

[0028] Prepare the aqueous solutions of zinc chloride and potassium ethyl xanthate with a concentration of 0.2 at a molar ratio of 1:1.3, drop the potassium ethyl xanthate solution into the zinc chloride solution while stirring, and continue stirring for half an hour; filter with suction , mix the resulting precipitate with deionized water, stir for a while, filter with suction, repeat 3-5 times, and obtain zinc ethyl xanthate powder after drying; prepare copper chloride and ethyl xanthate powder with a concentration of 0.2M respectively in a molar ratio of 1:1.3 Add the aqueous solution of potassium ethyl xanthate, drop the potassium ethyl xanthate solution into the copper salt solution while stirring, continue to stir for half an hour; filter with suction, mix the resulting precipitate with deionized water, filter with suction, repeat 3-5 times, after drying, copper ethyl xanthate powder is obtained;

[0029] Mix copper ethyl xanthate and zinc ethyl xanthate at a molar ratio...

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