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Preparation method of three-phase composite photocatalytic material

A composite photocatalysis and composite material technology, which is applied in the field of preparation of three-phase composite photocatalytic materials, can solve problems such as modification effects that have not been tried yet, and achieve high visible light capture capacity, mild reaction conditions, and good transmission effects.

Pending Publication Date: 2021-07-13
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Nowadays, some people have made two catalysts of metalloporphyrin-titanium dioxide, titanium dioxide-carbon nitride, and metalloporphyrin-carbon nitride, but no one has tried the modification effect of these three products.

Method used

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  • Preparation method of three-phase composite photocatalytic material
  • Preparation method of three-phase composite photocatalytic material
  • Preparation method of three-phase composite photocatalytic material

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preparation example Construction

[0039] A preparation method of a three-phase composite photocatalytic material, specifically comprising the following steps:

[0040] Step 1: Put C 3 h 3 N 6 and CH 4 N 2 The mixture of S is applied high temperature calcination method to prepare graphite phase carbon nitride g-C 3 N 4 ,Specifically:

[0041] Step 1.1, weigh an appropriate amount of melamine C 3 h 3 N 6 with thiourea CH 4 N 2 S mixed well in a mortar, C 3 h 3 N 6 with CH 4 N 2 The weight ratio of S is 5:1~8:1;

[0042] Step 1.2, put the mixture obtained in step 1.1 into a semi-closed alumina crucible, cover it and place it in a muffle furnace at a heating rate of 2°C / min to 550°C-600°C for 4 hours, then cool down to room temperature to obtain Yellow powdery solid, dried and ground to give g-C 3 N 4 .

[0043] Step 2, take carboxybenzaldehyde, pyrrole and anhydrous tin chloride as raw materials, prepare tetracarboxyphenyl tin porphyrin SnTCPP, specifically:

[0044] Step 2.1, weigh 2.16g of ...

Embodiment 1

[0056] Step 1: Put C 3 h 3 N 6 and CH 4 N 2 The mixture of S uses high temperature calcination method to prepare g-C 3 N 4 ,Specifically:

[0057] Step 1.1: Weigh C with a weight ratio of 5:1 3 h 3 N 6 with CH 4 N 2 Mix well in a mortar;

[0058] Step 1.2: Place the mixture obtained in Step 1.1 in a semi-closed alumina crucible, cover it and place it in a muffle furnace at a heating rate of 2°C / min to 550°C for 4 hours, then cool down to room temperature to obtain a light yellow powder solid, dried and ground to give g-C 3 N 4 .

[0059] Step 2: take carboxybenzaldehyde, pyrrole and anhydrous tin chloride as raw materials, prepare tetracarboxyphenyl tin porphyrin SnTCPP, specifically:

[0060] Step 2.1: Weigh 2.16g of 4-formylbenzoic acid into a three-necked flask, pour 150mL of propionic acid, heat the oil bath to 135°C, slowly add the mixture of 1mL of pyrrole and 20mL of propionic acid dropwise, and control it within 60min After the dropwise addition, reflux...

Embodiment 2

[0077] Step 1: Prepare g-C 3 N 4 ,Specifically:

[0078] Step 1.1: Weigh C with a weight ratio of 6:1 3 h 3 N 6 with CH 4 N 2 Mix well in a mortar;

[0079] Step 1.2: Place the mixture obtained in step 1.1 in a semi-closed alumina crucible, cover it and place it in a muffle furnace at a heating rate of 2°C / min to 600°C for 4 hours, then cool down to room temperature to obtain a light yellow powder solid, dried and ground to give g-C 3 N 4 .

[0080] Step 2: prepare tetracarboxyphenyl tin porphyrin SnTCPP, specifically:

[0081] Step 2.1: Weigh 2.16g of 4-formylbenzoic acid into a three-necked flask, pour 150mL of propionic acid, heat the oil bath to 135°C, slowly add the mixture of 1mL of pyrrole and 20mL of propionic acid dropwise, and control it within 60min After the dropwise addition, reflux at 140°C for 2 hours after the dropwise addition;

[0082] Step 2.2: Cool the reaction product of step 2.1 to room temperature, add 50mL of ethanol and put it in the refrig...

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Abstract

The invention discloses a preparation method of a three-phase composite photocatalytic material, which comprises the following steps: step 1, preparing g-C3N4 from a mixture of melamine and thiourea by using a high-temperature calcination method; step 2, synthesizing SnTCPP by taking carboxybenzaldehyde, pyrrole and anhydrous tin chloride as raw materials; step 3, preparing a TiO2 / g-C3N4 two-phase composite material by a hydrothermal method; and 4, carrying out condensation on the carboxyl group of the SnTCPP and the amino group of the g-C3N4, so as to prepare the three-phase composite photocatalyst SnTCPP / TiO2 / g-C3N4. The preparation process has low requirements on equipment, the reaction conditions are mild, and the synthesis process is simple and easy to implement; and the prepared three-phase composite photocatalytic material has high visible light capturing ability, good electron and hole separation and transmission effects, and high photocatalytic degradation performance under the condition of visible light irradiation, and provides reliable reference basis for preparation of other multi-phase photocatalytic materials.

Description

technical field [0001] The invention belongs to the field of photocatalytic materials, and in particular relates to a preparation method of a three-phase composite photocatalytic material. Background technique [0002] With the rapid economic growth and the rapid development of industrialization, environmental pollution has become a big problem that needs to be solved at present. Among these pollutants, water pollution is the most serious. Water pollution mainly comes from domestic sewage, industrial wastewater, and various aspects such as medicine, chemical industry, agriculture and so on. The sewage contains various organic or inorganic substances, and long-term accumulation leads to worsening water quality. The traditional sewage treatment methods mainly include sedimentation method, adsorption method, microbial method and so on. Although the purification efficiency of this method is very high, the chemical reagents used will also pollute the environment in disguise. ...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J21/06B01J31/22B01J37/10B01J31/38C02F1/30C02F101/30C02F101/36C02F101/38
CPCB01J27/24B01J21/063B01J31/2208B01J37/10B01J31/38B01J31/181C02F1/30C02F2101/30C02F2101/308C02F2101/36C02F2101/38C02F2101/40C02F2305/10B01J35/39
Inventor 何仰清马占营杨谦曹凯姚秉华
Owner XIAN UNIV OF TECH
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