CN-120861090-B - Catalyst with Bi-O/S mixed coordination structure and application thereof

CN120861090BCN 120861090 BCN120861090 BCN 120861090BCN-120861090-B

Abstract

The application discloses a catalyst with a Bi-O/S mixed coordination structure and application thereof, wherein the catalyst comprises a sulfur indium zinc nano-sheet, and oxygen atoms and bismuth atoms doped in the sulfur indium zinc nano-sheet, according to the application, the mixed coordination structure of bismuth-oxygen bond and bismuth-sulfur bond is doped in the sulfur indium zinc nano-sheet, so that the efficiency of photocatalytic synthesis of hydrogen peroxide is remarkably improved, and the catalyst can efficiently synthesize hydrogen peroxide under deionized water and natural light without adding a sacrificial agent.

Inventors

SHEN ZHURUI
CHEN FANGYUAN
Cao Gaoqing
LIU JIAN

Assignees

南开大学

Dates

Publication Date: 20260508
Application Date: 20250707

Claims (7)

1. The catalyst with the Bi-O/S mixed coordination structure is characterized by comprising a sulfur indium zinc nano-sheet, and oxygen atoms and bismuth atoms doped in the sulfur indium zinc nano-sheet, wherein the oxygen atoms and the bismuth atoms are doped in the sulfur indium zinc nano-sheet in the form of bismuth-oxygen bonds, and the catalyst comprises a bismuth-oxygen bond and bismuth-sulfur bond mixed coordination structure.
2. The preparation method of the catalyst with the Bi-O/S mixed coordination structure is characterized by comprising the steps of weighing the nano-sheets of the sulfur indium zinc in deionized water, stirring the nano-sheets of the sulfur indium zinc in ultrasonic mode until the nano-sheets are uniformly dispersed, dropwise adding a bismuth nitrate solution with the concentration of 0.1mol/L, stirring the solution for 10 hours, dropwise adding a sodium borohydride solution with the concentration of 0.1mol/L, stirring the solution for 0.5 hour, standing the solution for 0.5 hour, taking a precipitation part, and carrying out suction filtration washing on the precipitation part by using deionized water and absolute ethyl alcohol to obtain the catalyst with the Bi-O/S mixed coordination structure, wherein the addition amount ratio of the nano-sheets of the sulfur indium zinc to the deionized water to the bismuth nitrate solution to the sodium borohydride solution is 100mg:30mL:4.79 mL.
3. The preparation method of the catalyst with the Bi-O/S mixed coordination structure, which is disclosed in claim 2, is characterized by further comprising the steps of dissolving zinc acetate dihydrate, indium chloride tetrahydrate and thioacetamide in a mixed solvent of absolute ethyl alcohol and deionized water to obtain a mixed solution, placing the mixed solution in a polytetrafluoroethylene-lined reaction kettle, wherein the reaction temperature in the reaction kettle is 180 ℃, the reaction time in the reaction kettle is 24 hours, and the indium zinc sulfide nano-sheet is obtained, wherein the molar ratio of zinc acetate dihydrate to indium chloride tetrahydrate to thioacetamide is 1:2:8, the concentration of zinc acetate dihydrate to indium chloride tetrahydrate to thioacetamide in the mixed solvent is 0.0133mol/L, 0.0267mol/L and 0.1067mol/L respectively, and the volume ratio of absolute ethyl alcohol to deionized water in the mixed solvent is 1:1.
4. Use of a catalyst having a Bi-O/S mixed coordination structure according to claim 1 or a catalyst having a Bi-O/S mixed coordination structure according to any one of claims 2 to 3 in the photocatalytic synthesis of hydrogen peroxide.
5. The use of claim 4, wherein the use is the synthesis of hydrogen peroxide in a body of water, wherein the body of water is one or more of deionized water, tap water, and river water.
6. The use according to claim 4, wherein the photocatalytic light is 300W xenon lamp light of an AM 1.5G filter.
7. The use according to claim 4, wherein the photocatalytic light is outdoor natural sunlight.

Description

Catalyst with Bi-O/S mixed coordination structure and application thereof Technical Field The invention relates to the technical field of photocatalytic materials, in particular to a catalyst with a Bi-O/S mixed coordination structure and application thereof. Background Hydrogen peroxide (H 2O2) is used as an environment-friendly sustainable oxidant and has wide application in the fields of environmental remediation, organic synthesis, energy conversion, medical disinfection and the like. The photocatalysis technology can directly convert water and oxygen into H 2O2 by utilizing solar energy to drive oxygen reduction reaction, and provides a very potential approach for realizing green synthesis of H 2O2. In the related art, the catalytic efficiency of the catalyst in the photocatalysis process is not high, and alcohol and other sacrificial agents are needed to improve the photocatalysis efficiency, and the addition of the sacrificial agents can lead to the complexity of the product and further increase the purification difficulty of H 2O2. It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the present disclosure and thus may include information that does not constitute prior art known to those of ordinary skill in the art. Disclosure of Invention Aiming at the defects, the application provides the catalyst with the Bi-O/S mixed coordination structure and the application thereof, and the mixed coordination structure of the bismuth-oxygen bond and the bismuth-sulfur bond is doped in the sulfur indium zinc nano-sheet, so that the efficiency of synthesizing the hydrogen peroxide by photocatalysis is remarkably improved, and the catalyst can efficiently synthesize the hydrogen peroxide under deionized water and natural light without adding a sacrificial agent. In order to achieve the above purpose, the present application provides the following technical solutions: according to an aspect of the present application, there is provided a catalyst having a Bi-O/S mixed coordination structure, the catalyst including a sulfur-indium-zinc nano-sheet, and an oxygen atom and a bismuth atom doped in the sulfur-indium-zinc nano-sheet. In some embodiments, the oxygen atoms and the bismuth atoms are doped in the sulfur indium zinc nanoplatelets in the form of bismuth-oxygen bonds. In some embodiments, a mixed coordination structure of bismuth-oxygen bonds and bismuth-sulfur bonds is included in the catalyst. According to another aspect of the application, the preparation method of the catalyst with the Bi-O/S mixed coordination structure comprises the steps of weighing the nano-sheets of the sulfur indium zinc in deionized water, stirring the nano-sheets of the sulfur indium zinc in ultrasonic mode until the nano-sheets are uniformly dispersed, dropwise adding a bismuth nitrate solution with the concentration of 0.1mol/L, stirring the solution for 10 hours, dropwise adding a sodium borohydride solution with the concentration of 0.1mol/L, stirring the solution for 0.5 hour, standing the solution for 0.5 hour, taking a precipitation part, and carrying out suction filtration washing on the precipitation part by using deionized water and absolute ethyl alcohol to obtain the catalyst with the Bi-O/S mixed coordination structure, wherein the addition amount ratio of the nano-sheets of the sulfur indium zinc, the deionized water, the bismuth nitrate solution and the sodium borohydride solution is 100mg:30mL:4.79 mL. In some embodiments, the preparation method further comprises the steps of dissolving zinc acetate dihydrate, indium chloride tetrahydrate and thioacetamide in a mixed solvent of absolute ethyl alcohol and deionized water to obtain a mixed solution, placing the mixed solution in a polytetrafluoroethylene-lined reaction kettle, wherein the reaction temperature in the reaction kettle is 180 ℃, the reaction time in the reaction kettle is 24 hours, and the indium zinc sulfide nano-sheet is obtained, wherein the concentration of zinc acetate dihydrate, indium chloride tetrahydrate and thioacetamide in the mixed solvent is 0.0133mol/L, 0.0267mol/L and 0.1067mol/L respectively, and the volume ratio of absolute ethyl alcohol to deionized water in the mixed solvent is 1:1. According to another aspect of the application, the application also provides a catalyst with a Bi-O/S mixed coordination structure or an application of the catalyst with the Bi-O/S mixed coordination structure prepared by the preparation method of the catalyst with the Bi-O/S mixed coordination structure in photocatalytic synthesis of hydrogen peroxide. In some embodiments, the application is the synthesis of hydrogen peroxide in a body of water, wherein the body of water is one or more of deionized water, tap water, and river water. In some embodiments, the photocatalytic light is light from a 300W xenon lamp of an AM 1.5G filter. In some embodiments, the photocatalytic l