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Preparation method of nitrogen-doped SrMoO4 efficient photocatalyst

A photocatalyst and nitrogen-doped technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of large band gap and meet equipment requirements Low, simple process steps, high photocatalytic activity effect

Active Publication Date: 2021-09-03
ANHUI UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to overcome the SrMoO prepared in the prior art 4 The problem that the bandgap existing in photocatalyst is too large, the object of the present invention is to provide a kind of efficient photocatalyst nitrogen-doped SrMoO 4 preparation method

Method used

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  • Preparation method of nitrogen-doped SrMoO4 efficient photocatalyst
  • Preparation method of nitrogen-doped SrMoO4 efficient photocatalyst
  • Preparation method of nitrogen-doped SrMoO4 efficient photocatalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Efficient Photocatalyst Nitrogen Doped SrMoO 4 (Nitrogen doping ratio is 0.05) preparation method, the steps are as follows:

[0027] 1), according to the stoichiometric ratio, 2.5775g of strontium nitrate Sr(NO 3 ) 2 With 2.1611g of ammonium heptamolybdate tetrahydrate (NH 4 ) 6 Mo 7 o 24 4H 2 O was dissolved in 100 mL deionized water and stirred on a magnetic stirrer.

[0028] 2), under stirring conditions, slowly mix strontium nitrate Sr(NO 3 ) 2 Ammonium heptamolybdate tetrahydrate (NHH 4 ) 6 Mo 7 o 24 4H 2 O aqueous solution was mixed, and then NaOH solution (96%, mass percentage) was added dropwise to adjust the pH value of the mixed solution to be about 7.

[0029] 3) Pour the mixed solution into a high-temperature and high-pressure reactor (Parr 4577) for hydrothermal reaction. The reaction temperature is 120° C. and the reaction time is 360 minutes. After the reaction, wait for the reactor to cool down to room temperature naturally, take out the ...

Embodiment 2～6

[0035] The difference from Implementation 1 is only that the molar ratio of N to Sr is 0.1, 0.15, 0.2, 0.4, 0.6 in sequence, and other process parameters are completely the same.

[0036]Embodiment 1~6 product performance characterization

[0037] 1. X-ray diffraction test

[0038] SrMoO was tested separately by X-ray powder diffractometer (XRD) 4 (Example 1 step 3) preparation, the same below) and the nitrogen-doped strontium molybdate SrMoO prepared in Examples 4-6 4 Photocatalytic materials, by figure 1 The position and relative intensity of each diffraction peak in the comparison with the standard PDF card (JCPDS 08-0482) shows that the prepared sample is a strontium molybdate photocatalytic material. Nitrogen doping can promote the photocatalytic performance of strontium molybdate, and each peak in the spectrum is sharp, indicating that the crystallization degree of the sample is good.

[0039] 2. UV-visible light test

[0040] SrMoO was tested separately using a UV ...

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Abstract

The invention discloses a preparation method of a nitrogen-doped SrMoO4 efficient photocatalyst, and relates to the technical field of preparation of photocatalyst materials. The preparation method comprises the following steps: firstly, preparing SrMoO4 from ammonium heptamolybdate tetrahydrate (NH4)6Mo7O24. 4H2O and strontium nitrate Sr(NO3)2 by adopting a hydrothermal method, then doping nitrogen element with urea CH4N2O, and preparing the nitrogen-doped SrMoO4 efficient photocatalyst by adopting a steam thermal method. The nitrogen-doped strontium molybdate is prepared by adopting the hydrothermal method and the steam thermal method, the raw materials selected by the preparation method are safe and easy to obtain, the process steps are simple, no pollution is caused, and the requirement on equipment is low. The prepared efficient nitrogen-doped strontium molybdate photocatalyst can effectively degrade the methylene blue solution, has relatively high photocatalytic activity and can be repeatedly used for multiple times.

Description

technical field [0001] The invention relates to the technical field of preparation of photocatalyst materials, in particular to a high-efficiency photocatalyst nitrogen-doped SrMoO 4 method of preparation. Background technique [0002] Photocatalytic degradation of organic pollutants refers to the oxidation and decomposition of organic pollutants under the irradiation of light (visible light or ultraviolet light), and finally degrades into small molecular substances such as carbon dioxide, water and inorganic ions. It is currently the most promising pollution treatment method . [0003] SrO 4 It is a molybdate belonging to the scheelite structure, with a tetragonal symmetry structure, MoO 4 2- The ions are composed of four completely equivalent O ions centered on Mo ions, and present a tetrahedral symmetric form. Sr ions with a valence of +2 are also surrounded by eight O atoms, so Sr ions are identical to MoO 4 2- The ions share 8 adjacent O ions at the top corners. ...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J23/28B01J35/00C02F1/30C02F101/30
CPCB01J27/24B01J23/28C02F1/30C02F2101/308C02F2305/10B01J35/39
Inventor 戴振翔朱力为郑赣鸿
Owner ANHUI UNIVERSITY
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