Method for preparing metal-free high molecular polymer photocatalysis material

A technology of photocatalytic materials and polymers, which is applied in the field of preparation of polymer photocatalytic materials, can solve the problems of less types of materials and non-environmental protection in the preparation process, and achieve the effect of environmental protection in the preparation process, less steps and low preparation cost

Inactive Publication Date: 2013-05-01
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In summary, metal-free polymer photocatalytic materials have broad development prospects, but at present there are few types of materials, and the preparation process is not environmentally friendly.

Method used

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  • Method for preparing metal-free high molecular polymer photocatalysis material
  • Method for preparing metal-free high molecular polymer photocatalysis material
  • Method for preparing metal-free high molecular polymer photocatalysis material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Preparation of HPI photocatalytic materials:

[0032] Grind 1.26g (0.01 mol) melamine and 2.18g (0.01 mol) pyromellitic anhydride white powder evenly, place in a semi-closed stone boat, raise the temperature to 325°C at a rate of 7°C / min, keep the temperature for 4h, and cool to After room temperature, a yellow lump was obtained, which was ground into powder, washed with hot water, filtered and dried to obtain HPI photocatalytic material, and the molecular structure characteristic diagram is as follows: figure 1 shown. The specific surface area determined by nitrogen adsorption / desorption isotherm is 5.07m 2 / g, the absorption range measured by UV-visible absorption spectrum is 200-550nm, and the UV-Vis spectrum is as follows figure 2 shown. Put 0.2 g of HPI photocatalytic material in 100 ml of organic wastewater containing 4 ppm of Rhodamine B, stir for 60 min to reach adsorption equilibrium, turn on the xenon lamp light source with a 420 nm filter, react with visi...

Embodiment 2

[0034] Preparation of PA photocatalytic materials:

[0035] Grind 1.26g (0.01 mol) melamine and 2.10g (0.01 mol) white powder of tribenzenetricarboxylic acid evenly, place in a semi-closed stone boat, raise the temperature to 360°C at a rate of 7°C / min, keep the temperature for 4h, and cool to After room temperature, a deep yellow block was obtained, which was ground into powder, washed with hot water, filtered and dried to obtain a PA photocatalytic material, and the molecular structure characteristic diagram is as follows: figure 1 shown. The specific surface area determined by the nitrogen adsorption / desorption isotherm is 4.06m 2 / g, the absorption range measured by UV-visible absorption spectrum is 200-800nm, and the UV-Vis spectrum is as follows figure 2 shown. Put 0.2g of PA photocatalytic material in 100ml of organic wastewater containing Rhodamine B 4ppm, stir for 60min to reach adsorption equilibrium, turn on the xenon lamp light source with a 420nm filter, react...

Embodiment 3

[0037] Preparation of PU photocatalytic material:

[0038] Grind 1.26g (0.01 mol) of pyroglucinol and 1.60g (0.01 mol) of p-phenylene diisocyanate white powder evenly, place them in a semi-closed stone boat, raise the temperature to 150°C at a rate of 7°C / min, and keep the temperature for 4h. After cooling to room temperature, a yellow lump was obtained, which was ground into a powder, washed with hot water, filtered and dried to obtain a PU photocatalytic material, and the molecular structure characteristic diagram is as follows: figure 1 shown. The specific surface area determined by the nitrogen adsorption / desorption isotherm is 1.82m 2 / g, the absorption range measured by UV-visible absorption spectrum is 200-600nm, and the UV-Vis spectrum is as follows figure 2 shown. Put 0.2g PU photocatalytic material in 100ml organic wastewater containing 4ppm rhodamine B, stir for 60min to reach adsorption equilibrium, turn on the xenon lamp light source with 420nm filter, and rea...

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Abstract

The invention discloses a method for preparing a metal-free high molecular polymer photocatalysis material. In the method, the metal-free high molecular photocatalysis material is obtained by performing solid-phase polymerization on two kinds of monomers at the temperature 100-400 DEG C, wherein the monomers comprise organic amine, acid anhydride, aldehyde, carboxylic acid, phenol and isocyanate; and the photocatalysis material is HPI (Hyperbranched Polyamine Anhydride), PA (Polyamine Carboxylic Acid), PU (Polyphenol Isocyanate) or PAM (Polyamine Aldehydes). Compared with the prior art, the method has the advantages of: easiness and convenience for operating, small quantity of steps, low preparation cost of the photocatalysis material, environmentally-friendly preparation process, freeness from metal, preparation of a high molecular photocatalysis material with visible light absorbing performance by thermally polymerizing special monomers easily, utilization of sunlight for purifying the environment, and wide application prospect.

Description

technical field [0001] The invention relates to a preparation method of a macromolecular photocatalytic material, in particular to a new type of metal-free macromolecular photocatalytic material obtained by using a specific organic monomer through heating and solid phase polymerization. Background technique [0002] In the 21st century, the biggest problem facing mankind is to solve energy shortage and environmental pollution. Solving these two problems is an urgent need for our country to achieve sustainable development and national security. Using new photocatalysts such as semiconductor oxides to efficiently utilize solar energy and convert solar energy into clean energy such as chemical energy, or directly decompose environmental pollutants, will fundamentally solve energy and environmental problems. my country is not only the fastest growing country in the world today, but also one of the most serious environmental polluters in the world today. With the rapid developm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/06C02F1/30C02F1/32C02F101/38
CPCY02W10/37
Inventor 王英储升骆磊磊孔飞罗思杨骏骋邹志刚
Owner NANJING UNIV
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