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Neodymium-doped bismuth ferrite nanometer photocatalyst and preparation method thereof

A nano-photocatalyst and photocatalyst technology, applied in the field of photocatalysis, can solve the problems of low photon quantum efficiency and high photo-generated electron-hole recombination rate

Inactive Publication Date: 2015-12-23
CHINA JILIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The present invention can solve the problems of high photogenerated electron-hole recombination rate and low photon quantum efficiency in bismuth ferrite to a certain extent by doping with neodymium element, and improve the visible light responsiveness and photocatalytic activity of bismuth ferrite; The preparation method of the composite photocatalyst is simple, the process conditions are easy to control, the cost is low, and it is easy for industrial production and popularization and application

Method used

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  • Neodymium-doped bismuth ferrite nanometer photocatalyst and preparation method thereof
  • Neodymium-doped bismuth ferrite nanometer photocatalyst and preparation method thereof
  • Neodymium-doped bismuth ferrite nanometer photocatalyst and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0020] According to the chemical formula Bi 0.99 Nd 0.01 FeO 3 Weigh 4.802g bismuth nitrate pentahydrate (Bi(NO 3 ) 3 ·5H 2 O), 0.043g neodymium nitrate hexahydrate (Nd(NO 3 ) 3 ·6H 2 O), 4.04g ferric nitrate nonahydrate (Fe(NO 3 ) 3 9H 2 O), according to the chemical formula Bi 0.98 Nd 0.02 FeO 3 Weigh 4.753g bismuth nitrate pentahydrate, 0.087g neodymium nitrate hexahydrate, 4.04g ferric nitrate nonahydrate and according to the chemical formula BiFeO 3 Weigh 4.850g of bismuth nitrate pentahydrate and 4.04g of ferric nitrate hexahydrate and dissolve them in 130ml of 0.2mol / L tartaric acid ethylene glycol solution, mix and stir evenly, and the total molar concentration of cations in the solution is 0.15mol / L L; The obtained three different precursor solutions were heated to 80°C respectively, and kept heating for 2 hours to obtain three different sols; the obtained three sols were respectively placed in an oven at 110°C, and dried continuously to obtain three diff...

Embodiment 2

[0027] According to the chemical formula Bi 0.99 Nd 0.01 FeO 3 Weigh 4.802g bismuth nitrate pentahydrate (Bi(NO 3 )3 ·5H 2 O), 0.043g neodymium nitrate hexahydrate (Nd(NO 3 ) 3 ·6H 2 O), 4.04g ferric nitrate nonahydrate (Fe(NO 3 ) 3 9H 2 O), according to the chemical formula Bi 0.98 Nd 0.02 FeO 3 Weigh 4.753g bismuth nitrate pentahydrate, 0.087g neodymium nitrate hexahydrate, 4.04g ferric nitrate nonahydrate and according to the chemical formula BiFeO 3 Weigh 4.850g of bismuth nitrate pentahydrate and 4.04g of ferric nitrate hexahydrate and dissolve them in 200ml of 0.1mol / L tartaric acid ethylene glycol solution, mix and stir evenly, and the total molar concentration of cations in the solution is 0.1mol / L L; The obtained three different precursor solutions were heated to 70°C, and kept heating for 1.5h to obtain three different sols; the obtained three sols were respectively placed in an oven at 100°C, and dried continuously to obtain three different xerogels; Th...

Embodiment 3

[0030] According to the chemical formula Bi 0.99 Nd 0.01 FeO 3 Weigh 4.802g bismuth nitrate pentahydrate (Bi(NO 3 ) 3 ·5H 2 O), 0.043g neodymium nitrate hexahydrate (Nd(NO 3 ) 3 ·6H 2 O), 4.04g ferric nitrate nonahydrate (Fe(NO 3 ) 3 9H 2 O), according to the chemical formula Bi 0.98 Nd 0.02 FeO 3 Weigh 4.753g bismuth nitrate pentahydrate, 0.087g neodymium nitrate hexahydrate, 4.04g ferric nitrate nonahydrate and according to the chemical formula BiFeO 3 Weigh 4.850g of bismuth nitrate pentahydrate and 4.04g of ferric nitrate hexahydrate and dissolve them in 100ml of 0.3mol / L tartaric acid ethylene glycol solution, mix and stir evenly, and the total molar concentration of cations in the solution is 0.2mol / L L; The obtained three different precursor solutions were heated to 90°C respectively, and kept heating for 2.5h to obtain three different sols; the obtained three sols were respectively placed in an oven at 120°C, and dried continuously to obtain three differen...

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Abstract

The invention provides a visible-light response type neodymium-doped bismuth ferrite nanometer photocatalyst. The neodymium-doped bismuth ferrite nanometer photocatalyst is characterized in that the chemical formula is Bi(1-x)NdxFeO3(0<x<=0.02), the photocatalyst is of a porous nanometer structure, and the particle size is within the range of 100-300 nm. Meanwhile, the invention further provides a preparation method of the nanometer photocatalyst. The preparation method is characterized in that ferric nitrate, ferric nitrate and neodymium nitrate are dissolved into an ethylene glycol proportionally to form a solution, a proper amount of tartaric acid is added to be used as a chelating agent, uniform mixing is performed, heating is performed to form sol to be dried, roasting is performed after grinding is performed, and then neodymium-doped bismuth ferrite nanometer powder can be obtained. The obtained neodymium-doped bismuth ferrite nanometer photocatalyst has the good visible-light response and light catalytic performance, the preparation method is simple, the technological conditions are easy to regulate and control, the cost is low, no pollution is caused, and industrial production, application and popularization are easy.

Description

technical field [0001] The invention relates to the technical field of photocatalysis, in particular to a neodymium-doped bismuth ferrite nano photocatalyst and a preparation method thereof. Background technique [0002] TiO 2 Semiconductor photocatalysts have the advantages of high ultraviolet photocatalytic efficiency, low cost, and good stability. TiO 2 The wide bandgap (3.2eV) leads to very low utilization of visible light, which is the majority of sunlight, so it is particularly important to find visible light-responsive photocatalysts. [0003] Bismuth ferrite (BiFeO 3 ) is a multiferroic material with a perovskite structure that exhibits both ferroelectricity and ferromagnetism at room temperature. Bismuth ferrite has a narrow band gap (2.2-2.8eV), can absorb visible light accounting for 48% of the solar spectrum, and has good chemical stability and photocatalytic activity under light conditions, which has attracted people's attention to its photocatalytic activit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/843C02F1/30C02F101/38
Inventor 秦来顺王森陈达黄岳祥魏钦华陈智
Owner CHINA JILIANG UNIV
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