CN-122010960-A - Porphyrin-Fe3+Complex nanowire and preparation method and application thereof

Abstract

The invention discloses a porphyrin-Fe 3+ complex nanowire, a preparation method and application thereof. The nanowire is prepared by dissolving FeCl 3 ·6H 2 O and 5,10,15, 20-tetra (4-carboxyphenyl) porphine in a mixed solvent of absolute ethyl alcohol and N, N-dimethylformamide, and carrying out ultrasonic treatment to obtain a mixed solution. And carrying out solvothermal reaction on the mixed solution in a high-pressure reaction kettle, naturally cooling to room temperature after the reaction is finished, and centrifugally separating to obtain a solid product, namely the porphyrin-Fe 3+ complex nanowire. The porphyrin-Fe 3+ complex nanowire provided by the invention has the advantages of large specific surface area, good conductivity, rich carboxyl groups on the surface, monodisperse metal nodes and a delocalized macrocyclic conjugated structure, and can be used for photocatalytic degradation of rhodamine 6G dye.

Inventors

• WANG CHAOFENG
• WANG YARONG
• JIANG HAOQING
• MA JIAHE

Assignees

• 河南省科学院激光制造研究所

Dates

Publication Date

20260512

Application Date

20260206

Claims (10)

1. 1. The preparation method of the porphyrin-Fe 3+ complex nanowire is characterized by comprising the following steps of: S1, adding a mixed solvent into an iron source and a porphyrin organic compound, and performing ultrasonic treatment to obtain a mixed solution; s2, carrying out solvothermal reaction on the mixed solution obtained in the step S1, naturally cooling to room temperature after the reaction is finished, and carrying out centrifugal separation to obtain a solid product; S3, washing and drying the solid product to obtain the porphyrin-Fe 3+ complex nanowire.
2. 2. The method according to claim 1, wherein in step S1, the iron source is ferric chloride hexahydrate.
3. 3. The preparation method according to claim 1, wherein in step S1, the molar ratio of the iron source to the porphyrin-like organic compound is 5-10:1.
4. 4. The preparation method of claim 1, wherein in the step S1, the mixed solvent is N, N-dimethylformamide and absolute ethyl alcohol in a volume ratio of 1:2-4.
5. 5. The preparation method according to claim 1, wherein in step S1, the ultrasonic power is 100-150 w, the ultrasonic temperature is 30 ℃, and the ultrasonic time is 20-40 min.
6. 6. The preparation method according to claim 1, wherein in the step S2, the solvothermal reaction is performed at a reaction temperature of 80-120 ℃ for 24-48 hours.
7. 7. The method according to claim 1, wherein in step S2, the centrifugal separation speed is 8000 to 10000rpm.
8. 8. The preparation method according to claim 1, wherein in step S1, the volume of the mixed solvent added to each 0.01-0.05 mmol of the porphyrin-based organic compound is 12-20 ml.
9. 9. A porphyrin-Fe 3+ complex nanowire prepared by the preparation method of any one of claims 1 to 8.
10. 10. Use of the porphyrin-Fe 3+ complex nanowire as defined in claim 9 in photocatalytic degradation of rhodamine 6G.

Description

Porphyrin-Fe 3+ complex nanowire and preparation method and application thereof Technical Field The invention relates to the technical field of porphyrin nanometer material manufacturing, in particular to a porphyrin-Fe 3+ complex nanowire, a preparation method and application thereof. Background Porphyrin is a common planar molecule with a large pi conjugated structure, has unique photoelectric property, adsorption property, catalytic property, structural stability and rich radical sites, and is widely applied to the fields of sensors, luminescence, catalysis, biology, nano devices and the like. For example, photoreaction centers for photosynthesis, redox catalysis of biomolecules, vitamin B12 and oxygen transport centers, and the like. In nature, porphyrins function by forming assemblies in a regular packing manner, and in the field of photocatalysis, many people use porphyrins by mimicking natural mesoporphyrin assemblies. The research shows that the porphyrin mainly has a side-by-side and head-to-head regular stacking mode, and the ordered stacking structure of the porphyrin can promote the delocalization of conjugated electrons, is favorable for the separation of electrons and holes and improves the photocatalysis efficiency. Currently, the common porphyrin assembly methods mostly rely on external assistance, such as the introduction of a template agent for non-covalent interactions, or complex chemical modification pretreatment of porphyrin molecules. These methods are not only cumbersome in steps, but also difficult to precisely regulate the assembly process. Because of the complexity of porphyrin intermolecular interactions (e.g., pi-pi stacking, metal coordination), the above methods are extremely prone to uncontrollable assembly routes, and the final products tend to be nanoparticles or amorphous aggregates with thermodynamically stable and heterogeneous morphology, rather than efficient photocatalytic materials with long range order structures. This uncertainty in morphology directly leads to unpredictable and unstable photovoltaic performance. Nanowires are one-dimensional nanomaterials that have excellent charge transport properties, and electrons (e-) and holes (h+) generated by light or electrical excitation need to be effectively separated and transferred to the surface to participate in a reaction. In the zero-dimensional nano particles, charges are transmitted in a jumping manner among different particles, so that the resistance is high, and the composite failure is easy. However, how to directly construct porphyrin-based metal complex nanowires with regular structure and uniform size without relying on complex templates or pre-modification to realize controllable self-assembly of porphyrin molecules and metal ions (such as Fe3+), is still a significant challenge facing the current field. Therefore, the development of a novel efficient and controllable preparation method of porphyrin-Fe 3+ complex nanowires is particularly important. The present invention is specifically proposed to solve the above-mentioned technical problems. Disclosure of Invention The invention aims to provide a preparation method of porphyrin-Fe3+ complex nanowires, which comprises the following steps: S1, adding a mixed solvent into an iron source and a porphyrin organic compound, and performing ultrasonic treatment to obtain a mixed solution; s2, carrying out solvothermal reaction on the mixed solution obtained in the step S1, naturally cooling to room temperature after the reaction is finished, and carrying out centrifugal separation to obtain a solid product; S3, washing and drying the solid product to obtain the porphyrin-Fe 3+ complex nanowire. Preferably, in step S1, the iron source is ferric chloride hexahydrate. Preferably, in the step S1, the molar ratio of the iron source to the porphyrin-like organic compound is (5-10): 1. Preferably, in step S1, the mixed solvent is N, N-dimethylformamide and absolute ethanol according to a volume ratio of 1 (2-4). Preferably, in step S1, the ultrasonic power is 100-150 w, the ultrasonic temperature is 30 ℃, and the ultrasonic time is 20-40 min. Preferably, in step S2, the reaction temperature of the solvothermal reaction is 80-120 ℃ and the reaction time is 24-48 h. Preferably, in step S2, the centrifugal separation speed is 8000-10000 rpm. Preferably, in the step S1, every 0.01-0.05 mmol of porphyrin-like organic compound, the volume of the mixed solvent is 12-20 mL, and the specific porphyrin-like organic compound is 5,10,15, 20-tetra (4-carboxyphenyl) porphin, which is called TCPP for short. The invention also provides a porphyrin-Fe 3+ complex nanowire prepared by the preparation method. The invention also aims to provide an application of the porphyrin-Fe 3+ complex nanowire in photocatalytic degradation of rhodamine 6G. The beneficial effects of the invention are as follows: according to the preparation method of the porphyrin-Fe3+ complex nanowire, TCPP and Fe3+ a