CN109999853A - A kind of high activity BiOCl/Bi24O31Cl10The preparation method of composite photocatalyst material - Google Patents

Abstract

The invention discloses a preparation method of a high-activity BiOCl/Bi ₂₄ O ₃₁ Cl ₁₀ composite photocatalytic material, which belongs to the technical field of photoelectric material synthesis. The main points of the technical solution of the present invention are: mix bismuth oxychloride and glucose in a molar ratio of 7:5, grind and mix evenly until no obvious glucose particles are observed, pour the fully ground mixed powder into a crucible and place it in a crucible. In a muffle furnace, the temperature was raised to 500-600°C for 60-120min at a heating rate of 5°C/min, cooled to room temperature with the furnace, and the sintered product was taken out and fully ground to obtain a highly active BiOCl/Bi ₂₄ O ₃₁ Cl ₁₀ composite light catalytic material. The preparation process of the invention is simple and feasible, the synthesis period is relatively short, and the prepared target product BiOCl/Bi ₂₄ O ₃₁ Cl ₁₀ composite photocatalytic material has potential application value in the field of optoelectronic materials.

Description

A kind of preparation method of high activity BiOCl/Bi24O31Cl10 composite photocatalytic material

technical field

The invention belongs to the technical field of photoelectric material synthesis, in particular to a preparation method of a high-activity BiOCl/Bi ₂₄ O ₃₁ Cl ₁₀ composite photocatalytic material.

Background technique

my country is rich in bismuth resources. In recent years, the annual output can reach more than 6,000 tons, and it is widely used. As a new type of photocatalytic material, bismuth oxychloride (BiOCl) exhibits excellent photocatalytic performance due to its unique layered structure and electronic properties, and has potential application prospects in the fields of energy, environmental protection, chemical industry, and materials. It has been reported that Bi ₂₄ O ₃₁ Cl ₁₀ combined with BiOCl can obtain excellent optoelectronic and photocatalytic properties (Liu, XY (Liu, Xiaoyan); Su, YG (Su, Yiguo); Zhao, QH (Zhao, Qihang) , et al.Scientific Reports, 2016, 6:28689), however, the preparation methods reported in the literature are all to directly generate BiOCl/Bi ₂₄ O ₃₁ Cl ₁₀ composite materials, which cannot improve the performance of the generated BiOCl. The invention designs a method for preparing high-activity BiOCl/Bi ₂₄ O ₃₁ Cl ₁₀ composite photocatalytic material on the basis of BiOCl.

SUMMARY OF THE INVENTION

The technical problem solved by the present invention is to provide a preparation method of a high-activity BiOCl/Bi ₂₄ Cl ₁₀ O ₃₁ composite photocatalytic material with significantly improved photocatalytic activity.

The present invention adopts the following technical scheme in order to solve the above-mentioned technical problem, a kind of preparation method of high-activity BiOCl/Bi ₂₄ O ₃₁ Cl ₁₀ composite photocatalytic material, it is characterized in that the concrete steps are: the molar ratio of bismuth oxychloride and glucose is 7: Mix at a ratio of 5 and grind and mix evenly until no obvious glucose particles are observed. Pour the fully ground mixed powder into a crucible and place it in a muffle furnace to heat up to 500-600°C at a heating rate of 5°C/min. After 60-120 min, the furnace was cooled to room temperature, and the sintered product was taken out and fully ground to obtain a high-activity BiOCl/Bi ₂₄ O ₃₁ Cl ₁₀ composite photocatalytic material.

The preparation process of the invention is simple and feasible, the synthesis period is short, and the prepared target product BiOCl/Bi ₂₄ O ₃₁ Cl ₁₀ composite photocatalytic material has potential application value in the field of optoelectronic materials.

Description of drawings

Fig. 1 is the XRD pattern of the sample powder product BiOCl/Bi ₂₄ O ₃₁ Cl ₁₀ obtained in Example 1;

Fig. 2 is the partial XRD pattern of the sample powder product BiOCl/Bi ₂₄ O ₃₁ Cl ₁₀ obtained in Example 1;

Fig. 3 is the absorption spectrogram of the powder product BiOCl/Bi ₂₄ O ₃₁ Cl ₁₀ obtained in Example 1 for photocatalytic degradation of Rhodamine B solution;

Fig. 4 is a graph comparing the time-dependent change curve of the sample product BiOCl/Bi ₂₄ O ₃₁ Cl ₁₀ composite material obtained in Example 1 and pure BiOCl degrading Rhodamine B concentration;

5 is a powder UV-Vis absorption spectrum of BiOCl/Bi ₂₄ O ₃₁ Cl ₁₀ composite material and BiOCl, a sample powder product prepared in Example 1.

Detailed ways

The above-mentioned content of the present invention is described in further detail below through the examples, but it should not be understood that the scope of the above-mentioned subject matter of the present invention is limited to the following examples, and all technologies realized based on the above-mentioned content of the present invention belong to the scope of the present invention.

Example 1

Mix 0.2024g of bismuth oxychloride with 0.1000g of glucose, grind and mix evenly until no obvious glucose particles are observed, pour the fully ground mixed powder into a crucible and place it in a muffle furnace at a heating rate of 5°C/min The temperature was raised to 500° C. for sintering for 60 min, followed by cooling to room temperature in the furnace, and the sintered product was taken out and fully ground to obtain a high-activity BiOCl/Bi ₂₄ O ₃₁ Cl ₁₀ composite photocatalytic material.

Example 2

Mix 0.2024g of bismuth oxychloride with 0.1000g of glucose, grind and mix evenly until no obvious glucose particles are observed, pour the fully ground mixed powder into a crucible and place it in a muffle furnace at a heating rate of 5°C/min The temperature was raised to 500 °C for sintering for 120 min, followed by cooling to room temperature in the furnace, and the sintered product was taken out and fully ground to obtain a high-activity BiOCl/Bi ₂₄ O ₃₁ Cl ₁₀ composite photocatalytic material.

Example 3

Mix 0.2024g of bismuth oxychloride with 0.1000g of glucose, grind and mix evenly until no obvious glucose particles are observed, pour the fully ground mixed powder into a crucible and place it in a muffle furnace at a heating rate of 5°C/min The temperature was raised to 600° C. for sintering for 60 min, followed by cooling to room temperature in the furnace, and the sintered product was taken out and fully ground to obtain a high-activity BiOCl/Bi ₂₄ O ₃₁ Cl ₁₀ composite photocatalytic material.

Example 4

Mix 0.2024g of bismuth oxychloride with 0.1000g of glucose, grind and mix evenly until no obvious glucose particles are observed, pour the fully ground mixed powder into a crucible and place it in a muffle furnace at a heating rate of 5°C/min The temperature was raised to 600° C. for sintering for 120 min, followed by cooling to room temperature in the furnace, and the sintered product was taken out and fully ground to obtain a high-activity BiOCl/Bi ₂₄ O ₃₁ Cl ₁₀ composite photocatalytic material.

The products obtained in the above-mentioned 4 examples are respectively subjected to X-ray diffraction test. As shown in Figure 1, the X-ray diffraction peaks of the BiOCl/Bi ₂₄ O ₃₁ Cl ₁₀ composite photocatalytic material obtained in Example 1 include the diffraction peaks corresponding to BiOCl. Diffraction peaks corresponding to the peaks (JCPDS 73-2060) and Bi ₂₄ O ₃₁ Cl ₁₀ (JCPDS 75-0887). In order to analyze the XRD results more precisely, the XRD pattern of the composite photocatalytic material was enlarged in the range of 20-40°. As shown in Figure 2, two types of diffraction peaks were clearly observed in the composite photocatalytic material pattern, which were attributed to BiOCl respectively. and Bi ₂₄ O ₃₁ Cl ₁₀ , so the product composition of Example 1 is BiOCl/Bi ₂₄ O ₃₁ Cl ₁₀ . The same analysis method was used to analyze Examples 2, 3, and 4, and the results showed that the components in the three examples were BiOCl/Bi ₂₄ O ₃₁ Cl ₁₀ , which was consistent with Example 1; Figure 3 shows the absorption spectrum of BiOCl/Bi ₂₄ O ₃₁ Cl ₁₀ composite photocatalytic material for the photocatalytic degradation of Rhodamine B solution with time. Change curve diagram, Figure 4 is a comparison diagram of the change curve of the concentration of BiOCl/Bi ₂₄ O ₃₁ Cl ₁₀ composite photocatalytic material and BiOCl visible light catalytic degradation of Rhodamine B with time. It can be seen from the figure that the photocatalytic degradation efficiency of this sample to Rhodamine B Significantly better than BiOCl. Fig. 5 shows the powder visible light absorption spectra of BiOCl/Bi ₂₄ O ₃₁ Cl ₁₀ and BiOCl. Compared with BiOCl, BiOCl and Bi ₂₄ O ₃₁ Cl ₁₀ can absorb visible light in the light wave range of 400-460 nm after compounding, which may be due to The reason for the improvement of photocatalytic activity.

The above embodiments describe the basic principles and main features of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. Within the scope of the principles of the present invention, the present invention will also have various changes and improvements, and these changes and improvements all fall within the protection scope of the present invention.

Claims (1)

1. a kind of preparation method of high-activity BiOCl/Bi ₂₄ O ₃₁ Cl ₁₀ composite photocatalytic material, it is characterized in that concrete steps are: the ratio of bismuth oxychloride and glucose in molar ratio of 7:5 is mixed and ground and mixed until observation If there are no obvious glucose particles, pour the fully ground mixed powder into a crucible and place it in a muffle furnace to heat up to 500-600°C for 60-120min at a heating rate of 5°C/min, and cool to room temperature with the furnace. The sintered product is taken out and fully ground to obtain a high-activity BiOCl/Bi ₂₄ O ₃₁ Cl ₁₀ composite photocatalytic material.