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Preparation method of magnetic perovskite oxide La1-xBaxFe0.9Mn0.1O3-delta(x=0.1-0.3) and photocatalytic degradation of meta-cresol waste water

A photocatalytic and wastewater technology, applied in the direction of light water/sewage treatment, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of reduced catalytic activity, limited photocatalysts, and reduced photocatalysts Effective specific surface area and other issues, to achieve the effect of uniform particle size distribution, easy access to raw materials, and excellent photocatalytic degradation of m-cresol

Inactive Publication Date: 2013-07-24
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Thus immobilized TiO 2 The preparation of photocatalysts has received widespread attention. It has been reported in the literature: the TiO 2 Loaded on hollow glass or ceramic microbeads, foam plastics, resin and wood chips to make a floating photocatalyst, but the fixed catalyst reduces the effective specific surface area of ​​the photocatalyst, which often causes a decrease in catalytic activity and limits the photocatalyst. practical application of

Method used

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  • Preparation method of magnetic perovskite oxide La1-xBaxFe0.9Mn0.1O3-delta(x=0.1-0.3) and photocatalytic degradation of meta-cresol waste water
  • Preparation method of magnetic perovskite oxide La1-xBaxFe0.9Mn0.1O3-delta(x=0.1-0.3) and photocatalytic degradation of meta-cresol waste water
  • Preparation method of magnetic perovskite oxide La1-xBaxFe0.9Mn0.1O3-delta(x=0.1-0.3) and photocatalytic degradation of meta-cresol waste water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Weigh a certain amount of lanthanum nitrate, barium nitrate, ferric nitrate, manganese chloride, and stearic acid respectively so that the molar ratio is 0.9:0.1:0.9:0.1:8. First, melt stearic acid under constant temperature oil bath heating conditions, and melt lanthanum nitrate, barium nitrate, ferric nitrate, and manganese chloride solids into molten stearic acid under constant temperature magnetic stirring, and control the temperature at 120°C. The reaction is sufficient Time to make it a stearic acid complex solution. This was burned in a muffle furnace at 500° C. to obtain a precursor mixed oxide. Take out the burned product, grind it and put it in a muffle furnace, and calcinate it at 700 °C for 1 hour to get La 0.9 Ba 0.1 Fe 0.9 mn 0.1 o 3-δ Powder.

Embodiment 2

[0023] Weigh a certain amount of lanthanum nitrate, barium nitrate, ferric nitrate, manganese chloride, and stearic acid respectively so that the molar ratio is 0.8:0.2:0.9:0.1:9. First, melt stearic acid under constant temperature oil bath heating conditions, and melt lanthanum nitrate, barium nitrate, ferric nitrate, and manganese chloride solids into molten stearic acid under constant temperature magnetic stirring, and control the temperature at 123°C. The reaction is sufficient Time to make it a stearic acid complex solution. It was burned at 500° C. to obtain a precursor mixed oxide. Take out the burned product, grind it and put it in a muffle furnace, and calcinate it at 700 °C for 1 hour to get La 0.8 Ba 0.2 Fe 0.9 mn 0.1 o 3-δ Powder.

Embodiment 3

[0025] Weigh a certain amount of lanthanum nitrate, barium nitrate, ferric nitrate, manganese chloride, and stearic acid respectively so that the molar ratio is 0.7:0.3:0.9:0.1:10. First, melt stearic acid under constant temperature oil bath heating conditions, and melt lanthanum nitrate, barium nitrate, ferric nitrate, and manganese chloride solids into molten stearic acid under constant temperature magnetic stirring, and control the temperature at 125°C. The reaction is sufficient Time to make it a stearic acid complex solution. Burn it at 500°C to obtain the precursor mixed oxide, take out the burned product, grind it and put it in a muffle furnace, and calcinate it at 750°C for 1 hour to obtain La 0.7 Ba 0.3 Fe 0.9 mn 0.1 o 3-δ Powder.

[0026] (2) Example of photocatalytic degradation of m-cresol simulated wastewater

[0027] Example 1

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Abstract

A preparation method for a perovskite oxide La1-xBaxFe0.9Mn0.1O3-delta(x=0.1-0.3) comprises the following steps: weighting lanthanum nitrate, barium nitrate, ferric nitrate, manganese chloride and eleaostearic acid according to mole ratio of (1-x): x: 0.9: 0.1: (7-10)(x=0.1-0.3), under the heating condition, melting a reactant in molten stearic acid, controlling the temperature at 117-126 DEG C, reacting for 8 hours, placing in a muffle furnace at the temperature of 300-500 DEG C for combustion, and placing the combusted product in the muffle furnace at the temperature of 700-800 DEG C for calcining for 1 hour to obtain a catalyst for the magnetic perovskite oxide La1-xBaxFe0.9Mn0.1O3-delta(x=0.1-0.3). The catalyst is subjected to photocatalytic degradation of 10-150mg / L meta-cresol waste water under sunlight or ultraviolet light, the pH value of waste water is adjusted to 3-6, and the concentration of H2O2 is 0.4-2g / L.

Description

technical field [0001] The present invention relates to perovskite type magnetic photocatalyst La 1-χ Ba χ Fe 0.9 mn 0.1 o 3-δ (χ=0.1-0.3) preparation, and a method for using these substances to photocatalytically degrade m-cresol simulated wastewater. The invention belongs to the field of photocatalytic treatment of wastewater. Background technique [0002] Photocatalytic oxidation can effectively remove many substances that are difficult to degrade or be removed by other methods, such as chloroform, polychlorinated biphenyls, organophosphorus compounds, polycyclic aromatic hydrocarbons, etc. At present, there are mainly two types of photocatalysts: suspension type and fixed type. Suspension photocatalysts uniformly dispersed in solution can fully absorb photon energy and have a relatively large surface area, so the photocatalytic activity is very high. However, suspension photocatalysts also bring about the problem of difficult separation. Thus immobilized TiO 2 Th...

Claims

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Application Information

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IPC IPC(8): B01J20/06B01J20/30B01J23/889B01J23/94C02F1/28C02F1/30C02F101/34
Inventor 卫芝贤肖彩梅曾伟伟叶少博李延斌
Owner ZHONGBEI UNIV
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