Safe and efficient formaldehyde light purification agent and preparation method thereof

A purification agent and formaldehyde technology, applied in the field of photocatalytic materials, can solve the problems of poor dispersion stability, unsafe hidden dangers, low light purification efficiency, etc., and achieve the effects of stable and long-lasting dispersion properties, safe use and high activity

Inactive Publication Date: 2018-11-23
SHENYANG INST OF AUTOMATION GUANGZHOU CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the shortcomings and deficiencies of the light purification agent in the above-mentioned prior art, such as low light purification efficiency, poor dispersion stability, unsafe hidden dangers caused by acidic or alkaline dispersion systems, etc., the primary purpose of the present invention is to provide a Preparation method of neutral, safe and efficient formaldehyde light purifier

Method used

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  • Safe and efficient formaldehyde light purification agent and preparation method thereof
  • Safe and efficient formaldehyde light purification agent and preparation method thereof
  • Safe and efficient formaldehyde light purification agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054]Put dicyandiamide and barbituric acid in a beaker with an appropriate amount of water at a mass ratio of 1:0.02, heat to 60°C and keep stirring for 30 minutes, and then dry it in an oven to obtain a precursor. The precursor was transferred to a crucible and calcined in a muffle furnace at a temperature of 550 °C, a holding time of 4 hours, and a heating rate of 3.0 °C / min; after natural cooling, it was ground into powder to obtain graphite phase carbon nitride ( BACN-1), weighed 1.2g BACN-1 and calcined again in a muffle furnace under air atmosphere, the calcining temperature was 500°C, the holding time was 3 hours, and the heating rate was 5°C / min. After natural cooling, a high specific surface area modified carbon nitride photocatalyst (BACN-2) was obtained. Weigh 0.1g BACN-2, disperse it in 100mL water (about 100g), use an ultrasonic machine to sonicate for 2 hours, and then use a centrifuge to obtain a light yellow suspension with a concentration of about 0.01wt% and...

Embodiment 2

[0063] Put dicyandiamide and barbituric acid in a beaker with an appropriate amount of water at a mass ratio of 1:0.01, heat to 40°C and keep stirring for 120 minutes, and then dry it in an oven to obtain a precursor. The precursor was transferred to a crucible and calcined in a muffle furnace at a temperature of 500 °C, a holding time of 6 hours, and a heating rate of 2.0 °C / min; after natural cooling, it was ground into powder to obtain graphite phase carbon nitride ( BACN-1), weighed 1.2g BACN-1 and calcined again in a muffle furnace under air atmosphere, the calcining temperature was 450°C, the holding time was 4 hours, and the heating rate was 10°C / min. After natural cooling, a high specific surface area modified carbon nitride photocatalyst (BACN-2) was obtained. Weigh 1.0g BACN-2, disperse it in 100mL water (about 100g), stir it with a mixer for 12 hours, and then let it stand for 2 days to obtain a light yellow suspension with a concentration of about 0.06wt% and a pH ...

Embodiment 3

[0065] According to the mass ratio of 1:0.1, dicyandiamide and barbituric acid were put in a beaker with an appropriate amount of water, heated to 100°C and kept stirring for 60 minutes, and then dried in an oven to obtain a precursor. The precursor was transferred to a crucible and calcined in a muffle furnace at a temperature of 620 °C, a holding time of 2 hours, and a heating rate of 4.0 °C / min; after natural cooling, it was ground into powder to obtain graphite phase carbon nitride ( BACN-1), weighed 1.2g BACN-1 and calcined again in a muffle furnace under air atmosphere, the calcining temperature was 550°C, the holding time was 1 hour, and the heating rate was 2°C / min. After natural cooling, a high specific surface area modified carbon nitride photocatalyst (BACN-2) was obtained. Weigh 0.02g BACN-2, disperse it in 100mL water (about 100g), shake it with a shaker for 24 hours, and centrifuge it with a centrifuge to obtain a light yellow suspension with a concentration of a...

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Abstract

The invention belongs to the technical field of a light catalysis material, and particularly relates to a neutral safe and efficient formaldehyde light purification agent and a preparation method thereof. The preparation method comprises the following steps of S1, putting carbonitride precursors and functional group molecules into a water; performing heating for dissolution; performing drying to obtain precursors; S2, performing high-temperature roasting on the precursors obtained in the S1 to obtain molecular doping graphite phase carbon nitride; S3, grinding the molecular doping graphite phase carbon nitride obtained in the S2 into powder; performing roasting again at 400 to 550 DEG C to obtain the graphite phase carbon nitride; S4, dispersing the graphite phase carbon nitride obtained in the S3 into water to obtain the neutral formaldehyde light purification agent. The safe and efficient formaldehyde light purification agent obtained by the method has the advantages that the specific surface area is great (285.3m<2>/g); the catalysis activity is high; when the formaldehyde light purification agent is used for formaldehyde gas light catalysis degradation, 80 percent of formaldehyde can be degraded in 16 hours; the dispersing agent is neutral water, so that the use is safer; the dispersion property is stable and durable.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic materials, in particular to a neutral, safe and efficient formaldehyde light purifier and a preparation method thereof. Background technique [0002] Formaldehyde is one of the simplest and most common aldehydes. Formaldehyde can cause changes in the central nervous system, enzyme activity in the body, and changes in the endocrine immune system. High concentrations of formaldehyde are toxic to the nervous system, immune system, and liver. Therefore, formaldehyde is very harmful to human body. [0003] Formaldehyde in indoor air mainly comes from furniture, paint and other aspects. At present, the methods for dealing with indoor formaldehyde on the market mainly include adsorption method, ozone oxidation method, photocatalytic oxidation method and metal oxidation method. Among them, the light purifier prepared by photocatalytic oxidation method is based on TiO 2 Mainly, this is because T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J37/08B01D53/86B01D53/72
CPCB01D53/72B01D53/8668B01D2255/802B01D2257/704B01D2257/708B01D2259/80B01J27/24B01J35/004B01J37/08
Inventor 陈志鸿吕海钦孟庆国苑明哲
Owner SHENYANG INST OF AUTOMATION GUANGZHOU CHINESE ACAD OF SCI
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