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A method for preparing melem capable of degrading multiple dyes

A melem, degradable technology, applied in the field of photocatalytic materials and preparation thereof, can solve the problems of complicated reaction operation process and long cycle, and achieve the effects of shortening preparation cycle, easy operation and simple preparation method

Inactive Publication Date: 2018-01-02
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The preparation method of existing melem, its reaction operation process is more numerous and diverse, and the cycle is longer; And use the melamine sintering one-step method to prepare the melem nano wire harness and have not been reported yet

Method used

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  • A method for preparing melem capable of degrading multiple dyes
  • A method for preparing melem capable of degrading multiple dyes
  • A method for preparing melem capable of degrading multiple dyes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1 The following steps were used to prepare melem: 2.5 g of melamine was weighed into a corundum ark, covered, and the corundum ark was placed in a closed tube furnace. Vacuumize, return to normal pressure with argon gas, argon flow rate is 50sccm, sintering temperature is 400-450°C, heating and cooling rate is 10°C / min, holding time is 2 hours, and the product is ground and collected.

[0025] The X-ray diffraction pattern analysis result of gained product shows that it is the melem of hexagonal crystal system, as figure 1 shown. Scanning electron microscopy shows microscopically that this process prepares melem nanowire bundles, such as figure 2 shown.

[0026] Taking Rhodamine B as an example, the application experiment of the melem catalyzed degradation dye prepared by this embodiment is described as follows: Take 20mg of melem, add it to a test tube containing 40ml of Rhodamine B with a concentration of 20ppm, and stir it in the dark After 40 minutes to ...

Embodiment 2

[0029] Example 2 Weigh 1 g of melamine and fill it into a corundum ark, cover it, and place the corundum ark in a closed tube furnace. Vacuumize, return to normal pressure with argon gas, the argon flow rate is 50 sccm, the sintering temperature is 500°C, the heating and cooling rate is 10°C / min, the holding time is 2 hours, and the product is ground and collected.

Embodiment 3

[0030] Example 3 3 g of melamine was weighed and loaded into a corundum ark, covered, and the corundum ark was placed in a closed tube furnace. Vacuumize, return to normal pressure with argon gas, the argon flow rate is 40 sccm, the sintering temperature is 400-450°C, the heating and cooling rate is 10°C / min, and the holding time is 5 hours. The product is ground and collected.

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Abstract

The invention discloses a method for preparing melem capable of degrading various dyes. The method is realized through the following steps: first, put melamine into a corundum ark, cover it, and place the corundum ark in a closed tubular In the furnace, vacuumize, return to normal pressure with argon gas, the flow rate of argon gas is 40~60sccm, the sintering temperature is 400~500℃, the heating and cooling speed is 8~15℃ / min, the holding time is 1.5~10 hours, and the product is ground and collect. The present invention adopts sintering one-step method to prepare melem, which requires low sintering temperature and short preparation period, and the prepared melem can catalytically degrade rhodamine B, methyl orange, Congo red, methylene blue, Various dyes such as methylene blue and malachite green, the method of the invention is simple, easy to operate and popularize.

Description

technical field [0001] The invention relates to a photocatalytic material and a preparation method thereof, in particular to a melem and a preparation method thereof, and belongs to the technical field of photocatalytic materials and their preparation and application. Background technique [0002] Mellem is an organic synthetic material with a long history. It was studied by Liebig as early as 1834. Due to the insolubility of melem, the heptazine ring always contained in the molecular structure has not been recognized until 1937. Pauling and Sturdivant obtained its molecular formula through assumptions. In 2003, Schnick and his colleagues reported the crystal structure and spectrum of melem in detail, and proved that melem is an important intermediate product in the process of preparing g-C3N4 by thermal condensation of melamine, and the temperature range of its formation is 400 °C ~450℃, because of the nucleophilicity of the amino group, melem can react with electrophilic ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/02C07D487/16C02F1/30
Inventor 简基康雷仁博曹丙垒
Owner GUANGDONG UNIV OF TECH