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Magnetic graphite phase carbon nitride/MIL-125(Ti) composite photocatalyst, and preparation method thereof

A graphitic carbon nitride, composite light technology, applied in the field of photocatalytic materials, can solve the problems of low catalytic activity, limited utilization, lack of visible light response, etc.

Inactive Publication Date: 2019-10-15
PUTIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its lack of response to visible light, MIL-125(Ti) has limited utilization of visible light under sunlight irradiation, resulting in lower catalytic activity compared to other semiconductor materials.

Method used

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  • Magnetic graphite phase carbon nitride/MIL-125(Ti) composite photocatalyst, and preparation method thereof
  • Magnetic graphite phase carbon nitride/MIL-125(Ti) composite photocatalyst, and preparation method thereof
  • Magnetic graphite phase carbon nitride/MIL-125(Ti) composite photocatalyst, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1: Fe 3 o 4 preparation of

[0032] In this embodiment, preferably, 1.08 g of ferric chloride hexahydrate, 0.80 g of polyethylene glycol, and 32 mL of ethylene glycol were mixed with magnetic stirring for 30 minutes, and then 2.88 g of anhydrous sodium acetate was added and magnetically stirred for 30 minutes. This precursor was transferred into a 50mL sealed reaction kettle with polytetrafluoroethylene lining, placed in an electric blast constant temperature drying oven at 200°C for solvothermal reaction for 8 hours, then cooled naturally to room temperature, separated by a magnet, and successively washed with distilled water Wash the product with absolute ethanol 3-5 times, and then place the product at 60°C for 48 hours in vacuum; after grinding, Fe 3 o 4 .

Embodiment 2

[0033] Example 2: Fe 3 o 4 @SiO 2 Preparation of Nanomaterials

[0034] In the present embodiment, preferably, take 100mg of Fe 3 o 4 Place in 80 mL of anhydrous isopropanol, ultrasonically disperse for 15 minutes, then add 7.50 mL of deionized water and 60 μL of tetraethyl silicate, then slowly add 9 mL of concentrated ammonia water to the above solution and ultrasonically for 35 minutes, then separate by magnet And wash the product with distilled water and absolute ethanol for 3-~5 times, and then place the product at 60°C for 48 hours in vacuum; after grinding, Fe 3 o 4 @SiO 2 nanomaterials.

Embodiment 3

[0035] Embodiment 3: the preparation of magnetic graphite phase carbon nitride / MIL-125 (Ti) composite photocatalyst

[0036] In this embodiment, preferably, weigh 0.05g of g-C 3 N 4 Place in 25.53 mL of N,N-dimethylformamide for ultrasonic dispersion, then add 2.84 mL of methanol, 1.76 g of terephthalic acid, and 2.18 mL of n-butyl titanate, mix magnetically for 30 minutes, and then add 50 mg of polyvinylpyrrolidone Continue to stir for 10min, and finally add 50mg of Fe 3 o 4 @SiO 2 The nanomaterials were dispersed in the above solution, and stirred electrically for 10 minutes. Move this precursor into a 50mL sealed reaction kettle with polytetrafluoroethylene lining, place it in an electric blast constant temperature drying oven at 150°C for solvothermal reaction for 16h, then cool it down to room temperature naturally, separate it with a magnet, and use it in sequence Wash the product with distilled water and absolute ethanol for 3-5 times, and then place the product at...

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Abstract

The invention belongs to the field of photocatalysis material, and more specifically discloses a magnetic graphite phase carbon nitride / MIL-125(Ti) composite photocatalyst, and a preparation method thereof. According to the preparation method, solvothermal method is adopted to prepare Fe3O4, thermal decomposition method is adopted to prepare g-C3N4, and modified St-ber method is adopted for coating of Fe3O4 with silicon dioxide layers to form Fe3O4@SiO2, the obtained Fe3O4@SiO2 is taken as an inner core, further solvothermal method is adopted to prepare the magnetic high-efficiency magnetic composite photocatalyst Fe3O4@SiO2 / g-C3N4 / MIL-125(Ti) with a core shell structure. The magnetic graphite phase carbon nitride / MIL-125(Ti) composite photocatalyst is capable of widening photo-induced electron cavity space distance effectively, so that photocatalysis efficiency is increased greatly; cost is low; the magnetic graphite phase carbon nitride / MIL-125(Ti) composite photocatalyst is friendlyto the environment; the magnetic performance is excellent; rapid effective separation can be realized; chemical properties are stable; the application prospect in the fields of photocatalysis and environment treatment is promising; and in addition, the photocatalyst is provided with magnetic performance, so that magnetic separation and circulation using, processing cost reduction, and economicalbenefit improvement can be realized. The magnetic graphite phase carbon nitride / MIL-125(Ti) composite photocatalyst can be used in photocatalysis environment treatment, and is beneficial for practicalapplications and industrialized production.

Description

technical field [0001] The invention belongs to the field of photocatalytic materials, and in particular relates to a magnetic graphite phase carbon nitride / MIL-125 (Ti) composite photocatalyst and a preparation method thereof. The composite material has broad application prospects in the fields of environment, energy and the like. Background technique [0002] Since Fujishima et al. reported the photocatalytic water splitting hydrogen production effect of semiconductor materials in 1972, semiconductor photocatalyst technology has set off a strong research boom in the world. With the emergence of energy shortage and environmental pollution, two problems that plague human society, the application of photocatalytic materials in pollution control, solar energy conversion, self-cleaning and other aspects has become a research work widely carried out by scholars from all over the world. g-C 3 N 4 It is a photocatalytic material widely used in photocatalytic technology. Its main...

Claims

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Application Information

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IPC IPC(8): B01J31/28C02F1/30C02F101/30C02F101/38
CPCB01J31/28C02F1/30C02F2101/308C02F2101/38C02F2305/10B01J35/33B01J35/39
Inventor 陈彰旭李先学傅明连朱丹琛
Owner PUTIAN UNIV