Preparation method of cerium dioxide nanosphere-carbon nitride composite visible light catalyst

A technology of ceria and nanospheres, which is applied in the field of preparation of carbon nitride composite visible light catalysts, can solve the problems of easy recombination of photogenerated electrons and holes, and achieve the goal of improving photocatalytic activity, degradation rate and photocatalytic performance Effect

Inactive Publication Date: 2019-12-13
HARBIN INST OF TECH
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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the photogenerated electrons and holes of existing carbon n

Method used

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  • Preparation method of cerium dioxide nanosphere-carbon nitride composite visible light catalyst
  • Preparation method of cerium dioxide nanosphere-carbon nitride composite visible light catalyst
  • Preparation method of cerium dioxide nanosphere-carbon nitride composite visible light catalyst

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specific Embodiment approach 1

[0022] Embodiment 1: This embodiment is a preparation method of ceria nanosphere-carbon nitride composite visible light catalyst, which is specifically completed according to the following steps:

[0023] 1. Preparation of carbon nitride: ①, dry grinding: dry the urea to obtain dried urea, then place it in a mortar for grinding to obtain urea powder; ② sintering: place the urea powder in an alumina crucible, and using aluminum foil paper to seal the alumina crucible to obtain a sealed alumina crucible containing the mixed powder, and placing the sealed alumina crucible filled with the mixed powder in a muffle furnace for sintering to obtain carbon nitride;

[0024] 2. Preparation of ceria hollow nanospheres:

[0025] ①. Preparation of silica powder: add ammonia water and ethanol to deionized water, stir and mix well, then add tetraethyl orthosilicate drop by drop, and stir for 1h to 2h, centrifuge to obtain a solid product, at a temperature of 60 ~ Dry the solid product to co...

specific Embodiment approach 2

[0031] Embodiment 2: The difference between this embodiment and Embodiment 1 is: the specific operation of the drying treatment described in step ① is as follows: place in an oven, and dry at a temperature of 40° C. to 80 for 6 hours to 24 hours. Others are the same as the first embodiment.

specific Embodiment approach 3

[0032] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the specific process of sintering described in step ② is as follows: first, the muffle furnace is heated at a rate of 3°C / min to 5°C / min. The internal temperature is raised from room temperature to 450°C to 700°C, and sintered at a temperature of 450°C to 700°C for 2h to 6h, and then the temperature is lowered to room temperature. Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a preparation method of a cerium dioxide nanosphere-carbon nitride composite visible light catalyst, relates to a preparation method of a carbon nitride composite visible lightcatalyst, and aims to solve the problem that photogenerated electrons and holes of the existing carbon nitride are easy to compound. The preparation method comprises the following steps of: (1), preparing carbon nitride; (2), preparing cerium dioxide hollow nanospheres, to be more specific, 1, preparing silicon dioxide powder; 2, preparing silicon dioxide slurry; 3, preparing mixed slurry; 4, preparing cerium dioxide @ silicon dioxide nanospheres; and 5, performing alkali etching to obtain cerium dioxide hollow nanospheres; and (3), compounding to obtain the cerium dioxide nanosphere-carbon nitride composite visible light catalyst. The preparation method has the advantages that 1, the compounding of the photo-induced electrons and the holes is effectively inhibited, and the photocatalyticactivity of the catalyst is improved; and 2, the degradation rate of sulfamethoxazole antibiotics is greatly improved; the method is mainly used for preparing the cerium dioxide nanosphere-carbon nitride composite visible light catalyst.

Description

technical field [0001] The invention relates to a preparation method of carbon nitride composite visible light catalyst. Background technique [0002] In recent years, micrograms or nanograms per liter of pollutants, ie "micropollutants", have been detected in soil and water bodies in different regions. These micro-pollutants from chemical industry, agriculture and life care enter water bodies through precipitation runoff or different forms of discharge. These micro-pollutants have a certain degree of accumulation, their chemical properties are relatively stable, and they are easy to accumulate in aquatic organisms, animals and even human bodies, and spread through the food chain. Therefore, these micro-pollutants also have a certain degree of persistence. And non-degradable so that it can exist in water for a long time, directly or indirectly affect the growth, development and reproduction of aquatic organisms. Among the many micro-pollutants, antibiotics are the most fre...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J35/00
CPCB01J27/24B01J23/10B01J35/004
Inventor 冯玉杰刘国宏王红月张照韩
Owner HARBIN INST OF TECH
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