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a ceo 2 @mos 2 /g-c 3 n 4 Ternary composite photocatalyst and preparation method thereof

A ternary composite, photocatalyst technology, used in catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., to achieve excellent visible light effect, achieve effective separation, and improve the effect of conduction rate

Active Publication Date: 2021-09-28
NANJING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, so far no CeO 2 @MoS 2 / g -C 3 N 4 Preparation of Heterojunction and Report on Photocatalytic Application

Method used

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  • a ceo <sub>2</sub> @mos <sub>2</sub> /g-c <sub>3</sub> n <sub>4</sub> Ternary composite photocatalyst and preparation method thereof
  • a ceo <sub>2</sub> @mos <sub>2</sub> /g-c <sub>3</sub> n <sub>4</sub> Ternary composite photocatalyst and preparation method thereof
  • a ceo <sub>2</sub> @mos <sub>2</sub> /g-c <sub>3</sub> n <sub>4</sub> Ternary composite photocatalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Take 5g of urea in a muffle furnace, uniformly heat up to 550°C at a heating rate of 2°C / min, calcinate at a constant temperature for 6 hours, and after natural cooling, grind the obtained solid into fine powder to obtain g-C 3 N 4 Nanosheets. Such as figure 1 , 2 , 3, 4, 5, pure g-C 3 N 4 The morphology of the compound is a two-dimensional sheet structure without obvious stacking phenomenon, and the characteristic peaks attributed to C and N elements can be clearly observed in the X-ray diffraction pattern and X-ray photoelectron spectroscopy, which shows that this method is suitable for synthesis g-C 3 N 4 Nanosheets are of extremely high purity.

[0039] In (2), 0.2g of cerium oxide hexahydrate can be dissolved in a mixed solution of 0.05ml of butylamine, 10ml of toluene and 20ml of distilled water. After stirring evenly until completely dissolved, the resulting mixed solution is transferred to a hydrothermal reaction kettle, and the reaction kettle is sea...

Embodiment 2

[0044] (1) Take 5g of urea in a muffle furnace, uniformly heat up to 550°C at a heating rate of 2°C / min, calcinate at a constant temperature for 6 hours, and after natural cooling, grind the obtained solid into fine powder to obtain g-C 3 N 4 Nanosheets.

[0045] (2) Get 0.4g of cerium oxide hexahydrate and dissolve it in a mixed solution of 0.15ml of butylamine, 20ml of toluene and 30ml of distilled water, stir until completely dissolved, transfer the resulting mixed solution to a hydrothermal reaction kettle, and seal the reaction kettle, Placed in a 170°C oven for hydrothermal treatment for 24 hours. After the reaction, the obtained product was repeatedly washed with ethanol and deionized water, filtered and dried at 60°C, and then the dried reaction product was calcined at 170°C for 24 hours to obtain CeO 2 Nanocrystalline.

[0046] (3) Take 0.30g sodium molybdate dihydrate, 0.10g g-C 3 N 4 The nanosheets were ultrasonically dispersed in a mixed solution of 0.4ml L-cy...

Embodiment 3

[0051] (1) Take 5g of urea and place it in a muffle furnace, uniformly heat up to 600°C at a heating rate of 5°C / min, calcinate at a constant temperature for 4 hours, and after natural cooling, grind the obtained solid into fine powder to obtain g-C 3 N 4 Nanosheets.

[0052] (2) Get 0.6g of cerium oxide hexahydrate and dissolve it in a mixed solution of 0.25ml of butylamine, 30ml of toluene and 25ml of distilled water, stir until completely dissolved, transfer the resulting mixed solution to a hydrothermal reaction kettle, and seal the reaction kettle, Placed in a 180°C oven for hydrothermal treatment for 24 hours. After the reaction, the obtained product was repeatedly washed with ethanol and deionized water, filtered and dried at 60°C, and then the dried reaction product was calcined at 180°C for 24 hours to obtain CeO 2 Nanocrystalline.

[0053] (3) Take 0.40g sodium molybdate dihydrate, 0.15g g-C 3 N 4 The nanosheets were ultrasonically dispersed in a mixed solution ...

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Abstract

The invention belongs to the field of nanomaterial preparation and discloses a CeO 2 @MoS 2 / g‑C 3 N 4 Composite photocatalytic material and preparation method thereof, comprising: (1) adding cerium oxide hexahydrate to a mixed solution of butylamine and toluene, after hydrothermal treatment of the obtained mixed solution, calcining the reaction product to obtain CeO 2 Nanocrystal; (2) sodium molybdate dihydrate, g-C 3 N 4 The nanosheets were ultrasonically dispersed in a mixed solution of L-cysteine ​​and dimethyl sulfoxide, and the resulting mixed solution was hydrothermally treated to obtain MoS 2 / g‑C 3 N 4 Nanosheets; (3) CeO 2 Nanocrystals and MoS 2 / g‑C 3 N 4 Ultrasonic dispersion in methanol solution, after the methanol volatilizes, the resulting product is collected as CeO 2 ‑MoS 2 / g‑C 3 N 4 Composite material; (4) the CeO 2 ‑MoS 2 / g‑C 3 N 4 The composite material was placed in a tube furnace and calcined in a nitrogen atmosphere to obtain CeO 2 @MoS 2 / g‑C 3 N 4 Ternary composite photocatalyst. The preparation method of the invention is simple and highly controllable, and the obtained composite photocatalyst has excellent photocatalytic degradation performance.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation and photocatalytic environmental energy and pollutant treatment, and in particular relates to a CeO 2 @MoS 2 / g -C 3 N 4 Composite photocatalytic material and preparation method thereof. Background technique [0002] With the rapid development of modern industrialization, the problems of environmental pollution and energy crisis have become increasingly prominent. Photocatalytic technology based on semiconductors and their derivative materials as a medium, as a solar-driven, pollution-free and cost-effective means, is becoming a hot new energy research direction. Ceria (CeO 2 ) is a rare earth metal oxide used in important industries in my country. It is rich in content, low in cost, non-polluting, and has good chemical stability. It has good application prospects in the fields of photocatalysis, hydrogen production, and optoelectronics. But CeO 2 There are two major defect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01J37/08B01J37/10B01J37/34C01B3/04C02F1/30B82Y30/00B82Y40/00C02F101/34C02F101/38
CPCB01J27/24B01J35/004B01J37/082B01J37/10B01J37/343B82Y30/00B82Y40/00C01B3/042C01B2203/0277C01B2203/1041C02F1/30C02F2101/34C02F2101/38C02F2305/10Y02E60/36
Inventor 鲜啟鸣朱成章王鋙葶李昱升刘安鼐孙成
Owner NANJING UNIV
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