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Z-type Sr2MgSi2O7: Eu < 2 + >, Dy3+/Ag3PO4 photocatalyst and preparation method thereof

A photocatalyst, na2hpo4·12h2o technology, applied in the field of photocatalysis, can solve the problems of limiting the use of photocatalysts, achieve the effect of broadening the photoresponse range, broad prospects, and improving separation efficiency

Pending Publication Date: 2022-07-01
LIAONING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the use of photocatalysts must depend on the existence of light sources, and a series of photocatalytic hydrogen production and degradation reactions can only be carried out when there is sufficient light during the day, which limits the use of photocatalysts and becomes an urgent problem to be solved in photocatalytic reactions.

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  • Z-type Sr2MgSi2O7: Eu &lt; 2 + &gt;, Dy3+/Ag3PO4 photocatalyst and preparation method thereof
  • Z-type Sr2MgSi2O7: Eu &lt; 2 + &gt;, Dy3+/Ag3PO4 photocatalyst and preparation method thereof
  • Z-type Sr2MgSi2O7: Eu &lt; 2 + &gt;, Dy3+/Ag3PO4 photocatalyst and preparation method thereof

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Embodiment 1

[0041] Example 1 A new type of Z-type Sr 2 MgSi 2 O 7 :Eu 2+ ,Dy 3+ / Ag 3 PO 4 catalyst of light

[0042] (1) Preparation method

[0043] (1) Ag 3 PO 4 preparation

[0044] First, measure 150 mL of deionized water into 250 mL of beaker A and beaker B, respectively. According to the stoichiometry, weigh 2.541g AgNO 3 The solid was added to beaker A and stirred for 1.0 h to completely dissolve to obtain A solution. Weigh 1.7907gNa 2 HPO 4 ·12H 2 O solid was added to beaker B, stirred for 1.0h to make it completely dissolved to obtain B solution. The B solution was added dropwise to the A solution, and stirred for 3.0 h to fully react. After standing, the transparent supernatant was removed, and the reaction yielded a yellow precipitate, which was collected by centrifugation, and washed several times with deionized water. Then, the obtained samples were placed in a vacuum drying oven and dried at 60 °C for 12.0 h.

[0045] (2) Sr 2 MgSi 2 O 7 :Eu 2+ ,Dy 3+ ...

Embodiment 2

[0064] Example 2 Z-type Sr 2 MgSi 2 O 7 :Eu 2+ ,Dy 3+ / Ag 3 PO 4 Application of photocatalysts in photocatalytic degradation of levofloxacin and simultaneous hydrogen production

[0065] (1) Z-type Sr 2 MgSi 2 O 7 :Eu 2+ ,Dy 3+ / Ag 3 PO 4 Effects of Photocatalysts on Photocatalytic Degradation of Levofloxacin

[0066] Experimental method: 0.1g Z-type Sr 2 MgSi 2 O 7 :Eu 2+ ,Dy 3+ / Ag 3 PO 4The photocatalyst was placed in 100 mL of 30 mg / L levofloxacin solution. Under the condition of 25-28℃, irradiate with sunlight for 1.0h, and take samples every 30min. And after the end of the light, it was kept for 3.0h in the dark, and the samples were taken every 30min. The result is as Figure 8 .

[0067] Each suspension was placed in the dark for 30 min before sunlight exposure to achieve adsorption / desorption equilibrium. It can be seen from the dark experiment that in the presence of the photocatalyst, the concentration of levofloxacin decreases slightly with...

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Abstract

The invention belongs to the technical field of photocatalysis, and particularly relates to a Z-type Sr2MgSi2O7: Eu < 2 + >, Dy < 3 + > / Ag3PO4 photocatalyst and a preparation method thereof. The preparation method comprises the following steps: respectively putting AgNO3 powder and Na2HPO4. 12H2O powder into distilled water, continuously stirring for 50-60 minutes at room temperature, mixing the two solutions, stirring, washing and drying to obtain Ag3PO4 powder; the preparation method comprises the following steps: preparing Sr2MgSi2O7: Eu < 2 + >, Dy < 3 + > powder by adopting a sol-gel method; the preparation method comprises the following steps: respectively adding Ag3PO4 powder and Sr2MgSi2O7: Eu < 2 + > and Dy < 3 + > into absolute ethyl alcohol under a dark condition, stirring and dispersing, mixing the two solutions, stirring, washing and drying to obtain the Sr2MgSi2O7: Eu < 2 + >, Dy < 3 + > / Ag3PO4 nanoparticles. According to the invention, the Sr2MgSi2O7: Eu < 2 + >, Dy < 3 + > nanoparticles can degrade levofloxacin and generate hydrogen at the same time under the condition of sunlight illumination.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, in particular to a Z-type Sr 2 MgSi 2 O 7 :Eu 2+ ,Dy 3+ / Ag 3 PO 4 Photocatalyst and preparation method. Background technique [0002] With the continuous improvement of the level of social industrialization, the problems of energy shortage and environmental pollution have become urgent problems to be solved in modern society. Therefore, developing a clean and sustainable energy has become one of the methods to solve the above problems. Hydrogen is the cleanest energy found so far, with high energy density, it is the most ideal fuel for production and life. In industrial hydrogen production, natural gas is mainly used for hydrogen production and water electrolysis is used for hydrogen production. Among them, the production of hydrogen from fossil fuels is low in cost, but it will cause environmental pollution problems and is not an ideal way to produce hydrogen. Hydrogen producti...

Claims

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Application Information

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IPC IPC(8): B01J27/182B01J37/03B01J37/18C01B3/04C02F1/30C02F101/38C02F101/34C02F101/36
CPCB01J27/182B01J37/031B01J37/18C01B3/042C02F1/30C02F2101/38C02F2101/34C02F2101/36C02F2305/10B01J35/39
Inventor 房大维王君汤简赫宫海天
Owner LIAONING UNIVERSITY
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