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Nanosheet self-assembled spherical ferrous molybdate material as well as preparation method and application thereof

A ferrous molybdate, self-assembly technology, applied in nanotechnology, chemical instruments and methods, iron compounds, etc., can solve the problems of instability of ferrous iron, low symmetry, low thermodynamic stability, etc., and achieve product morphology The effect of regularity, low cost, excellent catalytic activity and stability

Active Publication Date: 2021-12-21
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the instability of ferrous iron, and ferrous molybdate is a monoclinic crystal system with low symmetry, the thermodynamic stability is low, and the synthesis of pure phase ferrous molybdate with controllable morphology is facing great challenges.

Method used

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  • Nanosheet self-assembled spherical ferrous molybdate material as well as preparation method and application thereof
  • Nanosheet self-assembled spherical ferrous molybdate material as well as preparation method and application thereof

Examples

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Embodiment 1

[0028] This embodiment provides a nanosheet self-assembled spherical ferrous molybdate (FeMoO 4 ) The preparation method of material, comprises the following steps:

[0029] First, ammonium heptamolybdate ((NH 4 ) 6 Mo 7 o 24 ) is the molybdenum source, and the amount that takes 1.0mmol is dissolved in 20mL deionized water and dissolves, and this moment adds thiourea (30mmol) and constantly stirs and fully mixes; Simultaneously, 1.0mmol ferrous sulfate hydrate (FeSO 4 ·7H 2 O) dissolved in 15mL deionized water (the molar ratio of molybdenum source to iron source is 1:1), and slowly added to the mixed solution of molybdenum salt and thiourea; the reaction solution was fully stirred at room temperature for 20min, and after ultrasonication for 5min , transfer the reaction precursor reaction solution to a microwave hydrothermal special reaction kettle, and place it in a microwave reactor for reaction. The microwave reaction temperature is 220°C, and the reaction time is 60min...

Embodiment 2

[0032] A kind of self-assembled spherical ferrous molybdate (FeMoO) of the present embodiment 4 ) The preparation method of material, its preparation method is the same as the preparation method of embodiment 1, and difference is, molybdenum source uses Na 2 MoO 4 .

Embodiment 3

[0034] A kind of self-assembled spherical ferrous molybdate (FeMoO) of the present embodiment 4 ) The preparation method of material, its preparation method is the same as the preparation method of embodiment 1, and difference is that ferrous salt uses ferrous chloride hydrate (FeCl 2 4H 2 O).

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Abstract

The invention belongs to the technical field of synthesis of inorganic functional materials, and discloses a nanosheet self-assembled spherical ferrous molybdate (FeMoO4) material as well as a preparation method and application thereof. The method comprises the following steps: dissolving a ferrous source, a molybdenum source and thiourea in deionized water according to a ratio, fully dissolving by stirring and ultrasonic waves, transferring a reaction material into a special microwave hydrothermal reaction kettle, carrying out a hydrothermal reaction in a microwave reactor, cooling to room temperature after the reaction is finished, and washing and drying a product to obtain the nanosheet self-assembled spherical iron molybdate. Compared with the prior art, the technical route provided by the invention is simple and rapid, the pH value does not need to be adjusted, the reaction rate is high, and the product morphology is regular. The nanosheet self-assembled spherical ferrous molybdate material provided by the invention is used as a heterogeneous catalyst for catalytic degradation of organic pollutants in water, and has the advantages of excellent catalytic activity and stability, simple preparation process and low cost.

Description

technical field [0001] The invention belongs to the technical field of synthesis of inorganic functional materials, in particular to a nanosheet self-assembled spherical ferrous molybdate (FeMoO 4 ) materials and their preparation methods and applications. Background technique [0002] Due to the advantages of good chemical stability, environmental friendliness and special structure, transition metal molybdates have attracted extensive attention in the fields of catalysis, magnetism, gas sensing, water treatment and energy. Ferrous molybdate (FeMoO 4 ) is a class of compounds containing divalent iron, and is a class of heterogeneous catalysts with considerable application prospects. However, due to the instability of ferrous iron, and ferrous molybdate is a monoclinic crystal system with low symmetry, the thermodynamic stability is low, and the synthesis of pure phase ferrous molybdate with controllable morphology is facing great challenges. Currently, only a few studies ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/00B82Y40/00B01J23/881B01J35/02B01J35/08C02F1/72C02F101/30B01J35/00
CPCC01G49/00B82Y40/00B01J23/881C02F1/725C02F2101/30C01P2004/32C01P2004/20C01P2004/61C01P2002/72C01P2004/03C01P2004/50B01J35/51B01J35/40Y02W10/37
Inventor 钟远红陈锦锋任礼许静怡陈金旭余林
Owner GUANGDONG UNIV OF TECH
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