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Preparation method of composite photocatalyst TiO2/g-C3N4 derived from MOF (Metal Organic Frameworks)

A technology of g-c3n4 and composite light is applied in the field of materials to achieve the effects of environmental friendliness, widening space distance and good degradation effect

Pending Publication Date: 2018-12-21
SHANDONG JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Currently, TiO is prepared using MIL-125 as a template 2 / g -C 3 N 4 Composite photocatalytic materials, no report

Method used

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  • Preparation method of composite photocatalyst TiO2/g-C3N4 derived from MOF (Metal Organic Frameworks)
  • Preparation method of composite photocatalyst TiO2/g-C3N4 derived from MOF (Metal Organic Frameworks)
  • Preparation method of composite photocatalyst TiO2/g-C3N4 derived from MOF (Metal Organic Frameworks)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Measure 0.39ml of tetrabutyl titanate, 13.5ml of dimethylformamide, 1.5ml of ethanol, weigh 1.5g of terephthalic acid, sonicate the above raw materials for 10min, then mix and stir at room temperature for 1h to form a uniform mixture ;Put the above mixed solution into a hydrothermal reaction kettle, and conduct a hydrothermal reaction at 160°C for 24 hours. After natural cooling, remove the supernatant, wash with terephthalic acid and absolute ethanol three times, and dry in an oven at 60°C 5h, the resulting product is MIL-125.

[0033]Weigh 500mg of MIL-125 and 100mg of melamine and place them in an agate mortar for full grinding and mixing for 10 minutes; put the evenly mixed mixture of MIL-125 and melamine into a crucible, then put it into a muffle furnace for heat treatment, and the heating program is : From room temperature to 500°C with a heating rate of 5°C / min, and keep it warm for 2h, then cool with the furnace, and the whole heat treatment process is carried o...

Embodiment 2

[0036] Measure 0.39ml of tetrabutyl titanate, 13.5ml of dimethylformamide, 1.5ml of ethanol, weigh 1.5g of terephthalic acid, sonicate the above raw materials for 10min, then mix and stir at room temperature for 1h to form a uniform mixture ;Put the above mixed solution into a hydrothermal reaction kettle, and conduct a hydrothermal reaction at 160°C for 24 hours. After natural cooling, remove the supernatant, wash with terephthalic acid and absolute ethanol three times, and dry in an oven at 60°C 5h, the resulting product is MIL-125;

[0037] Weigh 500mg MIL-125 and 200mg melamine and place them in an agate mortar for full grinding and mixing for 10 minutes; put the evenly mixed MIL-125 and melamine mixture into a crucible, then put it into a muffle furnace for heat treatment, and the heating program is : From room temperature to 500°C with a heating rate of 5°C / min, and keep it warm for 2h, then cool with the furnace, and the whole heat treatment process is carried out under...

Embodiment 3

[0040] Measure 0.39ml of tetrabutyl titanate, 13.5ml of dimethylformamide, 1.5ml of ethanol, weigh 1.5g of terephthalic acid, sonicate the above raw materials for 10min, then mix and stir at room temperature for 1h to form a uniform mixture ;Put the above mixed solution into a hydrothermal reaction kettle, and conduct a hydrothermal reaction at 160°C for 24 hours. After natural cooling, remove the supernatant, wash with terephthalic acid and absolute ethanol three times, and dry in an oven at 60°C 5h, the resulting product is MIL-125.

[0041] Weigh 500mg MIL-125 and 375mg melamine and place them in an agate mortar for full grinding and mixing for 10 minutes; put the evenly mixed MIL-125 and melamine mixture into a crucible, then put it in a muffle furnace for heat treatment, and the heating program is : From room temperature to 500°C with a heating rate of 5°C / min, and keep it warm for 2h, then cool with the furnace, and the whole heat treatment process is carried out under a...

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Abstract

The invention belongs to the technical field of materials, in particular to a preparation method of a composite photocatalyst TiO2 / g-C3N4 derived from MOF (Metal Organic Frameworks). The photocatalystis prepared by a hydrothermal method and a calcination method. A porous titanium-based metal organic framework MIL-125 is prepared by the hydrothermal method. Porous TiO2 nanoparticles are obtained by the calcination process. Melamine is grown in situ on the porous titanium-based metal organic framework MIL-125 by calcination process to obtain the composite photocatalyst TiO2 / g-C3N4. The preparation method provided by the invention is simple, and problems such as agglomeration of TiO2 particles, low specific surface area and low utilization rate of visible light can be effectively solved. Thespecific surface area of the TiO2 can be improved by the porous structure of the titanium-based metal organic framework MIL-125. A photocatalytic range of the TiO2 can be effectively improved by theg-C3N4. The composite photocatalyst TiO2 / g-C3N4 can effectively broaden a spatial distance of photogenerated electron holes, and inhibit the combination of the two. Therefore, the photocatalytic efficiency is greatly improved, the cost is low, environmentally frendly is ensured, and the practical applications and the industrialized productions are improved.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a photocatalytic material and a preparation method thereof. Background technique [0002] In recent years, energy crisis and environmental pollution have become global acute problems. Semiconductor catalysts can effectively convert solar energy into clean energy and degrade organic pollutants, thereby alleviating the energy crisis and reducing environmental pollution, and have been widely valued. TiO 2 It is one of the common semiconductor materials, which has good photoelectric performance, photocatalytic performance, good chemical stability, and non-toxicity. Excited by a very small proportion of ultraviolet light, it does not respond to visible light in sunlight and photogenerated electrons and holes are easy to recombine. g-C 3 N 4 It is a non-metallic photocatalyst with strong visible light absorption, but the specific surface area is relatively small, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C02F1/30C01B3/04C02F101/30
CPCC01B3/042C02F1/30B01J27/24C01B2203/0277C01B2203/1041C02F2101/308B01J35/39Y02E60/36
Inventor 贾坚王彦敏徐美苓张爱勤
Owner SHANDONG JIAOTONG UNIV
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