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Preparation method of Fe-g-C3N4 multifunctional nano composite material

A nanocomposite material, fe-g-c3n4 technology, applied in the field of water treatment, can solve the problems of small spectral response range, large forbidden band width, poor visible light absorption, etc.

Pending Publication Date: 2020-07-07
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

g-C 3 N 4 The molecule contains a large number of "N sites" composed of N with 6 lone pairs of electrons. These sites become ideal sites for binding metals, but the bulky g-C 3 N 4 In the process of light absorption, due to its large band gap and small spectral response range, it has poor absorption of visible light and low photocatalytic efficiency.

Method used

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  • Preparation method of Fe-g-C3N4 multifunctional nano composite material
  • Preparation method of Fe-g-C3N4 multifunctional nano composite material
  • Preparation method of Fe-g-C3N4 multifunctional nano composite material

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Embodiment 1

[0020] Example 1: 10 g of urea and 2.8 g of ferric chloride hexahydrate were dissolved in absolute ethanol, stirred thoroughly, and evaporated in a water bath to obtain a complex. The obtained composite was calcined once in a muffle furnace: the temperature was raised to 550°C and kept for 4 hours at a heating rate of 5°C / min, cooled naturally to room temperature, and then ground to an evenly distributed powder. After cleaning in a certain way, flake Fe-g-C 3 N 4 Complex (recorded as 1st Fe-g-C 3 N 4 ). The resulting flake Fe-g-C 3 N 4 The compound is placed in a tube furnace, and is subjected to secondary calcination thermal stripping treatment at 520 ° C for 2 h under an argon atmosphere, with a heating rate of 10 ° C / min for 2 h. Fe-g-C is obtained after cooling and grinding. 3 N 4 Nanocomposite (denoted as 2nd Fe-g-C 3 N 4 ).

[0021] Carry out primary and secondary calcinations without adding ferric chloride hexahydrate according to the same method as above to...

Embodiment 2

[0025] Embodiment 2: the prepared Fe-g-C 3 N 4 The nanocomposite was used as a catalyst to carry out test experiments under different systems. The main steps are as follows: 20mg of catalyst was added to 100mL of rhodamine B solution with a concentration of 10mg / L, and it was darkly adsorbed for 40min to achieve adsorption equilibrium, and then the xenon lamp light source was turned on to a 300W xenon lamp , filter out the ultraviolet light with a 420nm filter. Add 30% H 2 o 2 (1mmol / L) for degradation reaction; sampling every 5min, after filtering through a 0.45μm filter membrane, measure the absorbance of Rhodamine B at a wavelength of 555nm with a UV spectrophotometer.

[0026] image 3 In a is the addition of an equal amount of 2nd Fe-g-C 3 N 4 Rhodamine B degradation effect after catalyst in visible light catalytic oxidation, Fenton-like oxidation and Fenton-like / photocatalytic oxidation. It can be seen that the degradation rates of Rhodamine B by photocatalytic ox...

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Abstract

The invention discloses a preparation method of a Fe-g-C3N4 multifunctional nano composite material, which belongs to the field of water treatment. The method comprises steps of dissolving urea and ferric chloride hexahydrate in absolute ethyl alcohol, and stirring and evaporating to obtain a compound, calcining the compound in a muffle furnace for the first time, cooling, grinding and cleaning toobtain a flaky Fe-g-C3N4 flaky compound, putting the flaky Fe-g-C3N4 compound into a tubular furnace, and carrying out secondary calcination and thermal stripping, so as to obtain the Fe-g-C3N4 nanocompound. The invention also discloses the composite material prepared by the preparation method and a related application method thereof. The Fe-g-C3N4 prepared by the preparation method disclosed bythe invention can realize Fenton-like / photocatalytic oxidation synergistic degradation of pollutants, so that the photo-induced electron-hole recombination rate is reduced, and the applicable pH value range is widened.

Description

technical field [0001] The invention belongs to the field of water treatment and relates to a Fe-g-C 3 N 4 Multifunctional nanocomposite preparation method, prepared Fe-g-C 3 N 4 The composite material has the synergistic function of adsorption / Fenton-like oxidation / visible light catalytic oxidation. Background technique [0002] The water quality of industrial wastewater is complex and there are many types of pollutants. It is difficult to effectively remove refractory pollutants by conventional treatment technologies, which has always been a technical problem in the industry. These industrial wastewaters mainly involve metallurgy, light industry, chemical industry, medicine and other industries. At present, advanced oxidation technology is often used to remove refractory pollutants in industrial wastewater, mainly including ozone, Fenton, photocatalytic oxidation, etc. However, most of these advanced oxidation technologies have relatively strict application conditions...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/02B01J20/30C02F1/28C02F1/30C02F1/72B01J27/24B01J23/745C02F101/34C02F101/38
CPCB01J20/02B01J20/0259B01J20/28059C02F1/722C02F1/725C02F1/30C02F1/281B01J27/24B01J23/745C02F2305/026C02F2209/06C02F2305/10C02F2101/38C02F2101/34B01J35/23B01J35/39
Inventor 杨艳玲冀思扬李星周志伟樊晓燕
Owner BEIJING UNIV OF TECH
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