CeO2@MoS2/g-C3N4 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 the effects of increasing conduction rate, prolonging life, and reducing adsorption energy

Active Publication Date: 2019-08-23
NANJING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • CeO2@MoS2/g-C3N4 ternary composite photocatalyst and preparation method thereof
  • CeO2@MoS2/g-C3N4 ternary composite photocatalyst and preparation method thereof
  • CeO2@MoS2/g-C3N4 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. like 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 spectrum, 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, stirred evenly until completely dissolved, then the resulting mixed solution is transferred to a hydrothermal reaction kettle, and the reaction kettle is sealed Afte...

Embodiment 2

[0044] (1) Take 5g of urea and place it 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 cerium oxide hexahydrate and dissolve in the mixed solution of 0.15ml butylamine, 20ml toluene and 30ml distilled water, stir until completely dissolved, then transfer the gained mixed solution to the hydrothermal reaction kettle, after sealing 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...

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 nano-material preparation, and discloses a CeO2@MoS2 / g-C3N4 composite photocatalysis material and a preparation method thereof. The preparation method comprises the following steps: (1) adding cerium oxide hexahydrate to a mixed solution of butylamine and toluene, carrying out hydrothermal treatment on the obtained mixed solution, and calcining the obtained reaction product to obtain CeO2 nanocrystals; (2) ultrasonically dispersing sodium molybdate dihydrate and g-C3N4 nanosheets in a mixed solution of L-cysteine and dimethyl sulfoxide, and carrying outhydrothermal treatment on the obtained mixed solution to obtain MoS2 / g-C3N4 nanosheets; (3) ultrasonically dispersing the CeO2 nanocrystals and MoS2 / g-C3N4 in a methanol solution, volatilizing the methanol, and collecting the obtained product to obtain a CeO2-MoS2 / g-C3N4 composite material; and (4) placing the CeO2-MoS2 / g-C3N4 composite material in a tubular furnace, and calcining in a nitrogen atmosphere to obtain the CeO2@MoS2 / g-C3N4 ternary composite photocatalyst. The preparation method of the invention is simple and has strong controllability, and the obtained composite photocatalyst hasan 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 Applications(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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