阅读说明：本技术 一种钨酸铋硫化铜复合材料的制备方法 (Preparation method of bismuth tungstate and copper sulfide composite material ) 是由 管运涛 毛伟 张立勋 于 2020-04-29 设计创作，主要内容包括：一种钨酸铋硫化铜复合材料的制备方法,包括如下步骤：S1、以乙二醇为溶剂,制备油酸钠和五水合硝酸铋的混合溶液；S2、将二水合钨酸钠加入油酸钠硝酸铋混合溶液中；S3、将硫化铜加入步骤S2得到的混合溶液中；S4、使步骤S3得到的混合溶液进行反应；S5、获取反应后得到的反应物固体；S6、将所述反应物固体干燥后得到钨酸铋硫化铜复合材料。通过构建油酸钠乙二醇体系来制备钨酸铋/硫化铜复合材料,能够减少复合材料的带隙、增强复合材料的可见光响应、增强电子与空穴的迁移能力和降低光生载流子的复合速率,进而提高光催化性能。该复合材料可以应用于同步高效去除混合液中的罗丹明B、盐酸四环素和Cr(VI)。(A preparation method of a bismuth tungstate copper sulfide composite material comprises the following steps: s1, preparing a mixed solution of sodium oleate and pentahydrate bismuth nitrate by using ethylene glycol as a solvent; s2, adding sodium tungstate dihydrate into the sodium oleate bismuth nitrate mixed solution; s3, adding copper sulfide into the mixed solution obtained in the step S2; s4, reacting the mixed solution obtained in the step S3; s5, obtaining reactant solid obtained after the reaction; and S6, drying the reactant solid to obtain the bismuth tungstate copper sulfide composite material. The bismuth tungstate/copper sulfide composite material is prepared by constructing a sodium oleate ethylene glycol system, so that the band gap of the composite material can be reduced, the visible light response of the composite material can be enhanced, the migration capability of electrons and holes can be enhanced, the recombination rate of photon-generated carriers can be reduced, and the photocatalytic performance can be improved. The composite material can be applied to synchronously and efficiently removing rhodamine B, tetracycline hydrochloride and Cr (VI) in mixed liquor.)

1. A preparation method of a bismuth tungstate copper sulfide composite material is characterized by comprising the following steps:

s1, preparing a mixed solution of sodium oleate and pentahydrate bismuth nitrate by using ethylene glycol as a solvent;

s2, adding sodium tungstate dihydrate into the sodium oleate bismuth nitrate mixed solution;

s3, adding copper sulfide into the mixed solution obtained in the step S2;

s4, reacting the mixed solution obtained in the step S3;

s5, obtaining a reactant solid obtained after the reaction in the step S4;

and S6, drying the reactant solid to obtain the bismuth tungstate copper sulfide composite material.

2. The method of preparing a bismuth tungstate copper sulfide composite material as claimed in claim 1, wherein in step S1, sodium oleate is dissolved in ethylene glycol, and bismuth nitrate pentahydrate is added when the sodium oleate is completely dissolved.

3. The method for preparing a bismuth tungstate-copper sulfide composite material as claimed in claim 1 or 2, wherein in step S2, sodium tungstate dihydrate is dissolved in ethylene glycol at 60 ℃, and after complete dissolution, the sodium tungstate-copper sulfide composite material is added to the mixed solution of sodium oleate and bismuth nitrate and stirred for 1 hour.

4. The method of preparing a bismuth tungstate copper sulfide composite material as claimed in any one of claims 1 to 3, wherein in step S3, the copper sulfide is dissolved in ethylene glycol and subjected to ultrasonic treatment for 30min, and then added to the mixed solution obtained in step S2, and after stirring for 2h, the mixture is mixed uniformly.

5. The method of preparing a bismuth tungstate/copper sulfide composite material as claimed in any one of claims 1 to 4, wherein in step S4, the mixed solution obtained in step S3 is reacted in a reaction kettle at 180 ℃ for 20 hours.

6. The method of preparing a bismuth tungstate/copper sulfide composite material as claimed in any one of claims 1 to 5, wherein in step S5, after cooling to room temperature, the solid reactant is taken out and washed with a mixed solution of ethanol and water by suction filtration.

7. The method for preparing a bismuth tungstate/copper sulfide composite material as claimed in any one of claims 1 to 6, wherein in step S6, the washed reactant solid is dried at 60 ℃ for 4 hours to obtain the composite material bismuth tungstate/copper sulfide.

8. The method for preparing a bismuth tungstate copper sulfide composite material as claimed in any one of claims 1 to 7, further comprising, before step S1, the steps of:

s0, preparing the copper sulfide through a hydrothermal reaction.

9. The method for preparing the bismuth tungstate-copper sulfide composite material as claimed in claim 8, wherein in step S0, the copper acetate dihydrate and the thiourea are fully dissolved in distilled water, fully stirred at room temperature for 40min, reacted at 180 ℃ for 20h after fully mixed, cooled to room temperature after reaction, filtered, washed, and dried at 60 ℃ to obtain purple black copper sulfide powder.

10. The preparation method of the bismuth tungstate-copper sulfide composite material as claimed in any one of claims 1 to 9, wherein the raw material proportioning relationship is as follows: 4mmol of sodium oleate, 4mmol of bismuth nitrate pentahydrate, 2mmol of sodium tungstate dihydrate and 0.2-0.02g of copper sulfide.