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A nitrogen-doped γ-bi 2 moo 6 Preparation method of photocatalyst

A -bi2moo6, photocatalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve problems such as narrow band gap, orbital hybridization, and high valence band position, and meet equipment requirements The effect of low and high photocatalytic activity and simple process steps

Active Publication Date: 2022-02-18
ANHUI UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, due to the orbital hybridization between 6s of Bi ions and 2p of O, the valence band position is higher and the forbidden band width is relatively narrow (between 2.5-2.8eV)

Method used

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  • A nitrogen-doped γ-bi <sub>2</sub> moo <sub>6</sub> Preparation method of photocatalyst
  • A nitrogen-doped γ-bi <sub>2</sub> moo <sub>6</sub> Preparation method of photocatalyst
  • A nitrogen-doped γ-bi <sub>2</sub> moo <sub>6</sub> Preparation method of photocatalyst

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Nitrogen-doped γ-Bi 2 MoO 6 The preparation method of photocatalyst (the mol ratio of N and Mo is 1), and step is as follows:

[0025] Step 1: γ-Bi 2 MoO 6 Preparation of photocatalyst

[0026] 1), get 4.4096g of bismuth nitrate (Bi(NO 3 ) 3 ·5H 2 O, 99.5%) was dissolved in 30mL ethylene glycol and magnetically stirred for 30min until completely dissolved. Get 1.0997g of sodium molybdate (Na 2 MoO 4 2H 2 (2,99%) was dissolved in 40mL deionized water and magnetically stirred for 30min until completely dissolved.

[0027] 2), the Na 2 MoO 4 2H 2 O solution added Bi(NO 3 ) 3 ·5H 2 A mixed solution was formed in the O solution and stirred magnetically for 30 min until uniformly mixed, and then a sodium hydroxide (NaOH, 96%) solution was added to adjust the pH value to be neutral.

[0028] 3), put the above-mentioned precursor solution in a quartz cup, and put it into a high-temperature and high-pressure reactor, and add deionized water (such as figure 1 sh...

Embodiment 2～4

[0036] The difference from Embodiment 1 is that the molar ratios of N and Mo are 2, 3, and 4 in sequence (corresponding to the added urea weights are 29.5417mg, 44.3126mg, and 59.0834mg in sequence), and other process parameters are completely the same.

[0037] Embodiment 1~4 product performance characterization

[0038] 1. X-ray diffraction test

[0039] Utilize X-ray powder diffractometer (XRD) to test respectively the nitrogen-doped γ-Bi prepared by embodiment 1~4 2 MoO 6 and γ-Bi 2 MoO 6 (preparation in the first step of embodiment 1, the same below) photocatalytic material, by figure 2 The positions and relative intensities of each diffraction peak in are compared with the standard PDF card, and the prepared sample is γ-Bi 2 MoO 6 and nitrogen-doped γ-Bi 2 MoO 6 Photocatalytic material, nitrogen-doped γ-Bi 2 MoO 6 Photocatalytic materials for γ-Bi 2 MoO 6 The improvement of the photocatalytic performance has a great promotion effect.

[0040] 2. SEM test

...

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Abstract

A nitrogen-doped γ‑Bi 2 MoO 6 The invention discloses a photocatalyst preparation method, relating to the technical field of photocatalyst material preparation. Firstly, γ‑Bi was prepared by steam thermal method using sodium molybdate and bismuth nitrate 2 MoO 6 , then through urea CH 4 N 2 Nitrogen doped with O, and nitrogen-doped γ‑Bi prepared by steam thermal method 2 MoO 6 catalyst of light. The present invention uses urea as a nitrogen source to prepare a nitrogen-doped γ-Bi 2 MoO 6 The photocatalyst, the raw materials selected by the preparation method are safe and easy to obtain, the process steps are simple, no pollution, and the requirements for equipment are low. Nitrogen-doped γ‑Bi prepared 2 MoO 6 The photocatalyst can effectively degrade the methylene blue solution, has high photocatalytic activity, and can be reused many times.

Description

technical field [0001] The invention relates to the technical field of preparation of photocatalyst materials, in particular to a nitrogen-doped γ-Bi 2 MoO 6 Preparation method of photocatalyst. Background technique [0002] Photocatalytic technology is currently the most promising method for environmental pollution treatment. The so-called photocatalysis refers to the use of semiconductor materials as catalysts to perform environmentally friendly catalytic reactions driven by light. That is, under certain wavelength conditions, photogenerated carrier separation occurs in semiconductor materials, and the photogenerated electrons (or holes) combine with ions (or molecules) to generate oxidative (or reductive) active free radicals. This active free radical can degrade organic macromolecules into CO 2 、H 2 Small molecular substances such as O and inorganic ions. There is no secondary pollution in the whole process, and the degree of degradation is high. [0003] Bismuth-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24
CPCB01J27/24B01J35/39
Inventor 郑赣鸿汪伟戴振翔
Owner ANHUI UNIVERSITY