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Zero-dimensional cerium oxide/three-dimensional porous calcium indium sulfide composite nano material as well as preparation method and application thereof

A composite nanomaterial, zero-dimensional cerium oxide technology, applied in the direction of cerium oxide/cerium hydroxide, lanthanide oxide/hydroxide, rare earth metal oxide/hydroxide, etc., can solve the problem of high-carrier composite efficiency, low quantum efficiency, low efficiency, etc., to achieve the effect of improving catalytic efficiency, high photocatalytic reduction activity, and simple preparation process

Pending Publication Date: 2022-05-27
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, low light absorption, low quantum efficiency, and high carrier recombination rate all lead to low photocatalytic reduction of Cr(VI) ions, which limits its application, so the preparation of catalysts with higher catalytic reduction efficiency is the key

Method used

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  • Zero-dimensional cerium oxide/three-dimensional porous calcium indium sulfide composite nano material as well as preparation method and application thereof
  • Zero-dimensional cerium oxide/three-dimensional porous calcium indium sulfide composite nano material as well as preparation method and application thereof
  • Zero-dimensional cerium oxide/three-dimensional porous calcium indium sulfide composite nano material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A three-dimensional nanoflower structure calcium indium sulfide (CaIn 2 S 4 ) Material preparation:

[0037] 0.34g calcium nitrate tetrahydrate, 1.146g indium nitrate tetrahydrate (In(NO) 3 ) 3 ·4.5H 2 O) and 0.9 g of thioacetamide were added to 60 mL of a mixture of water and absolute ethanol (the volume ratio of water and ethanol was 1:1), stirred magnetically for 30 minutes, and then the resulting mixture was transferred to a volume of 100 mL with In a stainless steel autoclave lined with polytetrafluoroethylene, the reaction was carried out at 120 ° C for 24 hours. After the reaction was completed, it was naturally cooled to room temperature, and the obtained product was mixed with ethanol and deionized water (the volume ratio of water and ethanol was 1:1). ) were centrifuged and washed three times, and dried at 60 °C for 8 h under vacuum to obtain three-dimensional nanoflower-like CaIn 2 S 4 .

Embodiment 2

[0039] Zero-dimensional cerium oxide / three-dimensional porous calcium indium sulfide (5% CeO 2 / CaIn 2 S 4 ) Preparation of composite nanomaterials:

[0040] 200 mg of the three-dimensional nanoflower structure calcium indium sulfide (CaIn 2 S 4) The material was ultrasonically dispersed in a mixture of 60 mL of water and anhydrous ethanol (the volume ratio of water and anhydrous ethanol was 1:1), ultrasonically dispersed for 1 h (ultrasonic power was 180 W), continued magnetic stirring for 30 min, and then added 24.6 mg of Hydrate cerium nitrate, after continuous stirring for 30min, add 50 μL of concentrated ammonia water with a concentration of 25wt% dropwise, after ultrasonic dispersion for 30min, continue stirring at room temperature for 3h, the obtained product is a mixture of absolute ethanol and deionized water (the volume ratio of the two) 1:1) Centrifuge and wash several times until neutral, and then place in a 60°C vacuum oven to dry for 12 hours to obtain 5% CeO...

Embodiment 3

[0042] Zero-dimensional cerium oxide / three-dimensional porous calcium indium sulfide (10% CeO 2 / CaIn 2 S 4 ) Preparation of composite nanomaterials:

[0043] 200 mg of the three-dimensional nanoflower structure calcium indium sulfide (CaIn 2 S 4 ) The material was ultrasonically dispersed in a mixture of 60 mL of water and anhydrous ethanol (the volume ratio of water and ethanol was 1:1), ultrasonically dispersed for 1 hour, and then continued magnetic stirring for 30 minutes, then added 49.2 mg of cerium nitrate hexahydrate, and continued stirring for 30 minutes. , 100 μL of concentrated ammonia water with a concentration of 25wt% was added dropwise, and after ultrasonic dispersion for 30 minutes, stirring was continued for 3 hours at room temperature. ℃ dried in a vacuum oven for 12 h to obtain 10% CeO 2 / CaIn 2 S 4 Composite nanomaterials (based on CeO 2 The theoretical addition amount is CaIn 2 S 4 10% of the mass is denoted as 10% CeO 2 / CaIn 2 S 4 ).

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Abstract

The invention relates to a zero-dimensional cerium oxide / three-dimensional porous calcium indium sulfide composite nano-material and a preparation method and application thereof, and the zero-dimensional cerium oxide / three-dimensional porous calcium indium sulfide composite nano-material is obtained by uniformly distributing zero-dimensional cerium oxide on the surface of three-dimensional porous calcium indium sulfide, the three-dimensional porous calcium indium sulfide is obtained by densely clustering calcium indium sulfide nanosheets. The zero-dimensional cerium oxide / three-dimensional porous calcium indium sulfide composite nanomaterial provided by the invention is high in photocatalytic reduction activity, capable of efficiently reducing hexavalent chromium ions in a solution, high in stability and long in cycle service life.

Description

technical field [0001] The invention belongs to the technical field of catalysts containing sulfur element, and in particular relates to a zero-dimensional ceria / three-dimensional porous calcium indium sulfide composite nanomaterial and a preparation method and application thereof. Background technique [0002] With the development of industrial technology, the problem of heavy metal pollution is becoming more and more serious, threatening the safety of biological survival. Hexavalent chromium ion is a metal ion that can cause cancer by inhalation, may cause hereditary gene defects, and has lasting danger to the environment, but zero-valent chromium, trivalent or tetravalent low-valent chromium ions are not toxic, so Converting hexavalent chromium into low-valent chromium ions can effectively reduce the harm of hexavalent chromium ions to the environment. [0003] The traditional methods for removing Cr(VI) ions include precipitation, adsorption, ion exchange, electrocoagul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/04C01G15/00B82Y40/00C01F17/235C01F17/10C02F1/30C02F1/62C02F1/70C02F101/22
CPCB01J27/04C01G15/006B82Y40/00C01F17/235C01F17/10C02F1/30C02F1/70C02F1/62C02F2305/10C02F2101/22C01P2004/03C01P2002/72C01P2004/04C01P2004/80B01J35/39Y02W10/37
Inventor 蹇守卫高欣李宝栋杨欣汪丹枫雷宇婷王威振谭洪波黄健
Owner WUHAN UNIV OF TECH
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