Preparation method of Eu / Y doped ZrO2 heterogeneous junction photocatalyst
The preparation of Eu/Y doped ZrO2 heterophase junction catalyst by solid phase synthesis solved the problem that ZrO2 heterophase junction catalyst material was not reported, and the improvement of catalytic performance, process simplification and cost saving were achieved. This method was demonstrated. Industrialization potential.
Patent Information
- Application Number
- CN202110005127.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2021-01-05
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2041-01-05
AI Technical Summary
No relevant reports on ZrO2 heterophase junction catalyst materials have been seen in the prior art, resulting in the failure of effective improvement of the catalytic performance of rare earth-doped ZrO2 materials.
The Eu/Y doped ZrO2 heterophase junction catalyst material was prepared by simple solid phase synthesis reaction method. Zr0.897Eu0.1Y0.003O2 was prepared by calcining high-purity Y2O3, Eu2O3, and ZrO2 raw materials at 1200°C and undergoing secondary calcination. Material.
The preparation of Eu/Y doped ZrO2 heterophase junction catalyst is realized, which improves the catalytic performance, is simple in process, is cost-saving, and is easy to promote in industrialization. It shows a method to improve the catalytic performance of rare earth doped ZrO2 materials.
Smart Images
Figure HSA0000229611100000011 
Figure HSA0000229611100000012 
Figure HSA0000229611100000021
Abstract
Description
Technical Field
[0001] The invention relates to the field of functional ceramic materials, and in particular to a method for preparing a Eu / Y-doped ZrO2 heterogeneous junction photocatalyst. Background Art
[0002] Zirconia is widely used in the field of thermal barrier coating materials, luminescence and photocatalysis due to its wide band gap (5.7eV), low thermal conductivity and good acid-base redox performance. At the same time, the doping type, content, lattice, energy level behavior, material morphology and size of rare earth doped zirconia have attracted the interest of many researchers in the study of catalytic performance. Eu ions are rare earth luminescent ions, often used as fluorescent probes, and Y ions are often used as stabilizers for thermal barrier coatings. Doping ZrO2 with these two ions is an important topic in the current research field of catalytic applications. In this regard, people have carried out a lot of work. Through different preparation methods, changing the doping content and synthesis temperature, ZrO2 catalyst materials with corresponding surface morphology are obtained to improve the catalytic performance. Heterogeneous junctions can effectively improve the catalytic effect by achieving effective separation of photogenerated electrons and holes. This has been reported in many catalytic materials such as TiO2 and MoS2, but there has been no relevant report on ZrO2 heterogeneous junction catalyst materials. Summary of the invention
[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a method for preparing a Eu / Y doped ZrO2 heterogeneous junction photocatalyst material.
[0004] To achieve the above object, the present invention is implemented through the following technical solutions:
[0005] The present invention provides a method for preparing a Eu / Y doped ZrO2 heterojunction catalyst material. The chemical formula of the Eu / Y doped ZrO2 heterojunction catalyst material is Zr 0.897 Eu 0.1 Y 0.003 O2.
[0006] The Eu / Y doped ZrO2 heterogeneous junction catalyst material Zr 0.897 Eu 0.1 Y 0.003 O2 is prepared by a simple solid phase synthesis reaction method, wherein the method comprises the following steps:
[0007] Step 1: Use high-purity Y2O3, Eu2O3, and ZrO2 as raw materials, and prepare a 0.897 Eu 0.1 Y 0.003 O2, Y2O3 account for 0.3% of the total content, Eu2O3 accounts for 10% of the total content, and the molar proportion of ZrO2 is 89.7%;
[0008] Step 2: Place the raw materials in the molar ratio in step 1 in a mortar, add alcohol, and grind and mix thoroughly to obtain a uniformly mixed powder sample;
[0009] Step 3: Put the powder obtained in step 2 into a grinding mold and press the powder sample into a thin billet with a diameter of 8 mm under a pressure of 10 MPa;
[0010] Step 4: Place the thin billet obtained in step 3 into a high-temperature box furnace, set the temperature to 1200°C, calcine for 3 hours, then cool naturally, grind it again in a mortar, and calcine it again at 1200°C for 3 hours to obtain sample Zr 0.897 Eu 0.1 Y 0.003 O2.
[0011] Compared with the prior art, the preparation method of the present invention adopts the solid phase synthesis method to prepare Eu / Y doped ZrO2 heterogeneous junction photocatalyst material, which has the advantages of cost saving, simple process, strong operability, stable process, and easy large-scale industrial promotion. The preparation of Eu / Y doped ZrO2 heterogeneous junction photocatalyst by the method of the present invention can provide a reference for improving the catalytic performance of rare earth doped ZrO2 materials. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 (a) Zr 0.897 Eu 0.1 Y 0.003 Transmission electron microscopy image of O2 heterogeneous junction photocatalyst, (b) Zr 0.897 Eu 0.1 Y 0.003 High-resolution transmission electron microscopy image of O2 heterojunction photocatalyst, showing that the prepared sample has a heterojunction structure.
[0013] Figure 2 Zr 0.897 Eu 0.1 Y 0.003 The X-ray powder diffraction pattern of the O2 heterogeneous junction photocatalyst shows that the prepared sample is Zr 0.897 Eu 0.1 Y 0.003 O2.
[0014] Figure 3 Zr 0.897 Eu 0.1 Y 0.003 The catalytic degradation rate of Rhodamine B under UV-visible light for 120 min by O2 heterogeneous junction photocatalyst is compared with the degradation rate of Rhodamine B solution.
[0015] Figure 4 Zr 0.897 Eu 0.1 Y 0.003The first reaction kinetic curve of the O2 heterogeneous junction photocatalyst under UV-visible light irradiation on Rhodamine B solution for 120 min is compared with the first reaction kinetic curve of Rhodamine B solution.
[0016] Figure 5 Zr 0.897 Eu 0.1 Y 0.003 The absorbance of the O2 heterogeneous junction photocatalyst was measured under a UV-visible spectrophotometer. DETAILED DESCRIPTION
[0017] The present invention is now further described in conjunction with specific implementation examples:
[0018] Preparation of Zr 0.897 Eu 0.1 Y 0.003 O2, the preparation method thereof is as follows:
[0019] The Y ion doping content is a fixed value, the doping molar ratio is 0.3%, the doped Eu ion molar ratio is 10%, and the corresponding ZrO2 molar ratio is 89.7%. Use an electronic balance to weigh the raw material reagents corresponding to each ratio sample, grind and mix them in a mortar, and use a mold to press the raw material mixture fitted into the sample into a thin billet. Place the thin billet in a high-temperature box furnace, set the temperature to 1200℃, calcine for 3 hours, then cool naturally, grind the thin billet again, press it into a thin billet, place it in a high-temperature box furnace, set the temperature to 1200℃, and calcine it for 3 hours.
[0020] Figure 1 It means Zr 0.897 Eu 0.1 Y 0.003 Transmission electron microscopy and high-resolution transmission electron microscopy images of O2 heterogeneous junction photocatalyst. Figure 2 It means Zr 0.897 Eu 0.1 Y 0.003 X-ray powder diffraction pattern of O2 heterojunction photocatalyst. Figure 3 It means Zr 0.897 Eu 0.1 Y 0.003 The catalytic degradation rate of Rhodamine B under UV-visible light for 120 min by O2 heterogeneous junction photocatalyst is compared with the degradation rate of Rhodamine B solution. Figure 4 It means Zr 0.897 Eu 0.1 Y 0.003 The first reaction kinetic curve of the O2 heterogeneous junction photocatalyst under UV-visible light irradiation on Rhodamine B solution for 120 min is compared with the first reaction kinetic curve of Rhodamine B solution. Figure 5 It means Zr0.897 Eu 0.1 Y 0.003 The absorbance of the O2 heterogeneous junction photocatalyst was measured under a UV-visible spectrophotometer.
Claims
1. Application of a Eu / Y doped ZrO2 heterojunction material in photodegradation of Rhodamine B, characterized in that: The Eu / Y doped ZrO2 photocatalyst is prepared by a solid phase synthesis reaction method, wherein the method comprises the following steps: Step 1: Using high-purity Y2O3, Eu2O3, and ZrO2 as raw materials, the Y ion doping content is a fixed value, the doping molar ratio is 0.3%, the doped Eu ion molar ratio is 10%, and the corresponding ZrO2 molar ratio is 89.7%; Step 2: Place the raw materials in the molar ratio in step 1 in a mortar, add alcohol, and grind and mix thoroughly to obtain a uniformly mixed powder sample; Step 3: Put the powder obtained in step 2 into a grinding mold and press the powder sample into a thin billet with a diameter of 8 mm under a pressure of 10 MPa; Step 4: Place the thin billet obtained in step 3 into a high-temperature box furnace, set the temperature to 1200°C, calcine for 3 hours, then cool naturally, grind it again in a mortar, and calcine it again at 1200°C for 3 hours to obtain the Eu / Y-doped ZrO2 heterogeneous junction material.