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A kind of CE-containing lanthanum nickelate photocatalyst powder and its preparation method and application

A photocatalyst, lanthanum nickelate technology, applied in the field of photocatalysis, can solve problems such as unstable performance, environmental damage, and photocorrosion

Active Publication Date: 2019-11-15
东北大学秦皇岛分校
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, traditional visible light photocatalysts such as CdS and CdSe are prone to photocorrosion, unstable performance, and damage to the environment.

Method used

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  • A kind of CE-containing lanthanum nickelate photocatalyst powder and its preparation method and application
  • A kind of CE-containing lanthanum nickelate photocatalyst powder and its preparation method and application
  • A kind of CE-containing lanthanum nickelate photocatalyst powder and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A preparation method of Ce-containing lanthanum nickelate photocatalyst powder, comprising the steps of: taking by weighing 1mmol nickel nitrate, 1.96mmol lanthanum carbonate and 0.04mmol cerium acetate according to the molar ratio in the chemical molecular formula, and dissolving them in distilled water; wherein, the distilled water The volumetric dosage is 20 times the total molar weight of nickel acetate, lanthanum nitrate and cerium carbonate to obtain solution A; place solution A under constant temperature conditions of 80°C and mechanically stir for 30 minutes at a stirring speed of 1000r / min; add 1.5g Citric acid, 1000r / min magnetic stirring for 30min, until the solution is light green transparent gel, and the precursor gel is obtained; the precursor gel is put into an oven, and kept at 100°C for 8h, and the expanded substance B is obtained; the substance B is taken out and placed in a corundum crucible, and calcined in a muffle furnace. First, the temperature is ...

Embodiment 2

[0027] A preparation method of Ce-containing lanthanum nickelate photocatalyst powder, comprising the following steps: taking by weighing 3mmol nickel acetate and 6mmol lanthanum nitrate according to the molar ratio in the chemical molecular formula, dissolving them in distilled water to obtain solution A; wherein, the volumetric dosage of distilled water 30 times the total molar weight of nickel acetate and lanthanum nitrate; place solution A under constant temperature conditions of 75°C and mechanically stir for 35 minutes at a stirring speed of 500r / min; add 2g of citric acid to solution A, and stir magnetically at 500r / min for 50min. Until the solution is light green and transparent gel, the precursor gel is obtained; the precursor gel is put into an oven and kept at 150°C for 5 hours to obtain the expanded substance B; the substance B is taken out and placed in a corundum crucible, and the Calcined in a Furnace, the temperature was first raised to 850°C for 2.5h, kept at 8...

Embodiment 3

[0029] A preparation method of Ce-containing lanthanum nickelate photocatalyst powder, comprising the following steps: weighing 2mmol nickel nitrate, 3.72mmol lanthanum carbonate and 0.28mmol cerium nitrate according to the molar ratio in the chemical molecular formula, and dissolving them in distilled water to obtain solution A; Wherein, the volume consumption of distilled water is 40 times of the total molar weight of nickel nitrate, lanthanum carbonate and cerium nitrate; Solution A is placed in 80 ℃ of constant temperature conditions and mechanically stirred for 30min, stirring speed is 750r / min; In solution A, add 2g lemon Acid, 750r / min magnetic stirring for 90min, until the solution is light green transparent gel, and the precursor gel is obtained; the precursor gel is put into the oven, and kept at 150°C for 8.5h, and the expanded substance B is obtained; the substance B is taken out and placed in a corundum crucible, and calcined in a muffle furnace. First, the tempera...

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Abstract

The invention belongs to the technical field of photocatalysis, and in particular relates to a Ce-containing lanthanum nickelate photocatalyst powder and a preparation method and application thereof. The general formula of the photocatalyst powder is: Ce 2x La 2（1‑x） NiO 4 , where the value range of x is 0.01≤x≤0.25. The invention provides a novel Ce-containing lanthanum nickelate photocatalyst powder, the photocatalyst powder has uniform particles, stable structure and performance, high photocatalytic activity, long service life and good recyclability; meanwhile, the photocatalyst powder is provided The preparation method of the body has low requirements on equipment, simple operation process, convenient control, safety and no pollution.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, and in particular relates to a Ce-containing lanthanum nickelate photocatalyst powder and a preparation method and application thereof. Background technique [0002] Photocatalysis, as an emerging environmentally friendly technology, aims to convert recyclable, green and environmentally friendly solar energy into chemical energy, etc., which is of great significance to solving the global economic crisis and environmental pollution, and is crucial to the sustainable development of society . Currently, TiO 2 (P25) is the most common photocatalytic material. Its forbidden band width is 3.2eV, and it only responds in the ultraviolet spectral range. However, the energy in the ultraviolet region below the wavelength of 400nm accounts for less than 5% of the total energy of sunlight. This makes when TiO 2 When visible light is used as the excitation light source, the photocatalytic efficiency ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/83C02F1/30
CPCC02F1/30B01J23/002B01J23/83C02F2305/10B01J2523/00B01J35/50B01J35/39B01J2523/3706B01J2523/3712B01J2523/847
Inventor 刘宣文郭瑞史晓杰郑贵元岳铭张杨苏娜
Owner 东北大学秦皇岛分校