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Molecular sieve-based Ce-Mn oxide porous photocatalyst, and preparation method and application thereof

A photocatalyst, molecular sieve-based technology, applied in the field of molecular sieve-based Ce-Mn oxide porous photocatalyst and its preparation, can solve problems such as limited application, and achieve the effects of inhibiting recombination, increasing concentration, and improving photocatalytic ability

Pending Publication Date: 2019-10-22
QINGDAO XINJINGHUA ENVIRONMENTAL PROTECTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But since CeO 2 Higher band gap of 3.2 eV limits its application in visible light photocatalysis

Method used

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  • Molecular sieve-based Ce-Mn oxide porous photocatalyst, and preparation method and application thereof
  • Molecular sieve-based Ce-Mn oxide porous photocatalyst, and preparation method and application thereof
  • Molecular sieve-based Ce-Mn oxide porous photocatalyst, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Preparation of molecular sieve: After mixing 10.2 g of tetrapropylammonium hydroxide and 79 g of deionized water, 6.0 g of fumed white carbon black and 0.34 g of sodium aluminate were added in sequence. The solution was stirred at 50°C for 18h and then mixed with 9.44g CTAB (cetyltrimethylammonium bromide) for hydrothermal reaction. L (96% ethanol) NH 4 NO 3 Perform ion exchange at 80°C for 2h, and then calcinate at 550°C for 10h after drying, with a heating rate of 1°C / min.

[0039] (2) Loading of cerium oxide and manganese oxide: Weigh 1.53g of cerium acetate, 2.37g of manganese acetate, and 0.3g of molecular sieve, add them into 30ml of deionized water, heat and stir until they are completely dissolved. The obtained solution was stirred at 50°C for 12h, then ultrasonically treated for 30min, and finally solid-liquid separation was carried out by autothermal diafiltration, and the obtained solid was dried and calcined at 350°C for 2h with a heating rate of 1°C / m...

Embodiment 2

[0041] (1) Preparation of molecular sieve: After mixing 10.2 g of tetrapropylammonium hydroxide and 79 g of deionized water, 6.0 g of fumed white carbon black and 0.34 g of sodium aluminate were added in sequence. The solution was stirred at 50°C for 18h and then mixed with 9.44g CTAB (cetyltrimethylammonium bromide) for hydrothermal reaction. L (96% ethanol) NH 4 NO 3 Perform ion exchange at 80°C for 2h, and then calcinate at 550°C for 10h after drying, with a heating rate of 1°C / min.

[0042](2) Loading of cerium oxide and manganese oxide: Weigh 1.96g of cerium acetate, 1.52g of manganese acetate, and 0.3g of molecular sieve, add them into 30ml of deionized water, heat and stir until they are completely dissolved. The obtained solution was stirred at 50°C for 12h, then ultrasonically treated for 30min, and finally solid-liquid separation was performed by autothermal diafiltration, and the obtained solid was dried and calcined at 350°C for 2h with a heating rate of 1°C / min....

Embodiment 3

[0044] (1) Preparation of molecular sieve: After mixing 10.2 g of tetrapropylammonium hydroxide and 79 g of deionized water, 6.0 g of fumed white carbon black and 0.34 g of sodium aluminate were added in sequence. After the solution was stirred at 50°C for 18h, it was mixed with 9.44g CTAB (cetyltrimethylammonium bromide) for hydrothermal reaction. L (96% ethanol) NH 4 NO 3 Perform ion exchange at 80°C for 2h, and then calcinate at 550°C for 10h after drying, with a heating rate of 1°C / min.

[0045] (2) Loading of cerium oxide and manganese oxide: Weigh 2.29 g of cerium acetate, 0.88 g of manganese acetate, and 0.3 g of molecular sieve, add them into 30 ml of deionized water, heat and stir until they are completely dissolved. The obtained solution was stirred at 50°C for 12h, then ultrasonically treated for 30min, and finally solid-liquid separation was performed by autothermal diafiltration, and the obtained solid was dried and calcined at 350°C for 2h with a heating rate o...

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Abstract

The invention provides a molecular sieve-based Ce-Mn oxide porous photocatalyst, and a preparation method and an application thereof, and relates to the technical field of nanomaterial photocatalysis.The porous photocatalyst contains a large amount of meso-pores, and the active components of the porous photocatalyst composed of cerium oxide and manganese oxide, wherein the manganese oxide existsin an amorphous state, the cerium oxide exists in a crystalline state, and cerium atoms in the cerium oxide are partially substituted by manganese atoms. The preparation method comprises the followingsteps: certain amounts of cerium acetate, manganese acetate and a molecular sieve are weighed, and are added into deionized water, heating and stirring are carried out until the added substances arecompletely dissolved, the obtained solution is stirred and reacted, and then is ultrasonically treated, solid particles in the solution are separated from the solution, and the obtained solid is driedat a low temperature, and then is calcined at a high temperature to prepare the molecular sieve-based Ce-Mn oxide porous photocatalyst. The molecular sieve-based Ce-Mn oxide photocatalyst of the invention has the advantages of increase of photocatalytic active sites, expansion of the visible light response range, inhibition of the regeneration of photogenerated charges, and improved visible lightphotocatalytic activity.

Description

technical field [0001] The invention relates to the technical field of photocatalysis of nanomaterials, in particular to a molecular sieve-based Ce-Mn oxide porous photocatalyst and its preparation method and application. Background technique [0002] With the development of science and technology and the progress of society, people pay more and more attention to the problem of environmental pollution, and the degradation of organic matter in sewage treatment has always been a difficulty and a hot spot. According to records, about 70 tons of usable organic dyes are commercially produced every year. These organic dyes can absorb and reflect sunlight entering the water, interfere with the growth of bacteria and other organisms, and at the same time, they are highly toxic and chemically stable, and difficult to biodegrade. Once discharged into the Aquatic ecosystems will cause very serious harm to the ecological environment (source: Liu Xingyan, Xiong Cheng, Xu Yonggang, Tan Yu...

Claims

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Application Information

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IPC IPC(8): B01J29/04B01J35/10C02F1/30C02F101/30
CPCB01J29/045B01J23/002C02F1/30B01J2229/186C02F2305/10C02F2101/308B01J35/393B01J35/23B01J35/617B01J35/39B01J35/647
Inventor 韩野赵卓徐明悦王胜文
Owner QINGDAO XINJINGHUA ENVIRONMENTAL PROTECTION
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