G-C3N4/TiO2 multilevel structure and preparation method thereof

A g-c3n4, roasting technology, applied in the field of photocatalytic materials, can solve the problems of difficult preparation of high specific surface, difficult to control the shape, complex process, etc., and achieve the effect of low cost, simple preparation process and high photocatalytic efficiency

Active Publication Date: 2017-08-22
东营睿港管道工程有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims at preparing g-C in the prior art 3 N 4 /TiO 2 The process is complicated, the cost is high, and the morphology is difficult to control, especially it is difficult to prepare...

Method used

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  • G-C3N4/TiO2 multilevel structure and preparation method thereof
  • G-C3N4/TiO2 multilevel structure and preparation method thereof
  • G-C3N4/TiO2 multilevel structure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Weigh 0.24g of titanium sulfate and dissolve it in water, add 10ml of 10M NaOH, 15ml of ethylene glycol and 2.5ml of 30% H 2 o 2 , stirred on a magnetic stirrer for 5 min;

[0020] (2) Transfer the mixed solution obtained in step (1) to a high-pressure reactor lined with polytetrafluoroethylene, and heat at a constant temperature of 180° C. for 16 hours;

[0021] (3) Separate and wash the product obtained in step (2), then disperse it in hydrochloric acid with a concentration of 0.1M and soak for 12 hours, then separate the product after acid soaking, wash it with deionized water until it is neutral, and then wash it three times with alcohol , dried in an oven;

[0022] (4) The product obtained in step (3) was heated to 550°C at a heating rate of 10°C / min, and kept for 4h to obtain a multi-level structure TiO 2 ;

[0023] (5) dissolve urea (or melamine, dicyandiamide) with ethanol, then add the multi-level structure TiO of step (4) gained 2 , make urea (or mela...

Embodiment 2

[0025] (1) Weigh 0.24g of titanium sulfate and dissolve it in water, add 10ml of 10M NaOH, 15ml of ethylene glycol and 2.5ml of 30% H 2 o 2 , stirred on a magnetic stirrer for 5 min;

[0026](2) Transfer the mixed solution obtained in step (1) to a high-pressure reactor lined with polytetrafluoroethylene, and heat at a constant temperature of 180° C. for 16 hours;

[0027] (3) Separate and wash the product obtained in step (2), then disperse it in hydrochloric acid with a concentration of 0.1M and soak for 12 hours, then separate the product after acid soaking, wash it with deionized water until it is neutral, and then wash it three times with alcohol , dried in an oven;

[0028] (4) The product obtained in step (3) was heated to 550°C at a heating rate of 10°C / min, and kept for 4h to obtain a multi-level structure TiO 2 ;

[0029] (5) dissolve urea (or melamine, dicyandiamide) with ethanol, then add the multi-level structure TiO of step (4) gained 2 , make urea (or melam...

Embodiment 3

[0031] (1) Weigh 0.24g of titanium sulfate and dissolve it in water, add 10ml of 10M NaOH, 15ml of ethylene glycol, and 2.5ml of 30% H 2 o 2 , stirred on a magnetic stirrer for 5 min;

[0032] (2) Transfer the mixed solution obtained in step (1) to a high-pressure reactor lined with polytetrafluoroethylene, and heat at a constant temperature of 180° C. for 16 hours;

[0033] (3) Separate and wash the product obtained in step (2), then disperse it in hydrochloric acid with a concentration of 0.1M and soak for 12 hours, then separate the product after acid soaking, wash it with deionized water until it is neutral, and then wash it three times with alcohol , dried in an oven;

[0034] (4) The product obtained in step (3) was heated to 550°C at a heating rate of 10°C / min, and kept for 4h to obtain a multi-level structure TiO 2 ;

[0035] (5) dissolve urea (or melamine, dicyandiamide) with ethanol, then add the multi-level structure TiO of step (4) gained 2 , make urea (or mel...

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Abstract

The invention discloses a g-C3N4/TiO2 multilevel structure and a preparation method thereof. The g-C3N4/TiO2 multilevel structure is characterized in that the g-C3N4/TiO2 multilevel structure can be used as a high-performance photocatalyst. According to the method, inorganic titanium sulfate, hydrogen peroxide, sodium hydroxide and ethylene glycol as raw materials are prepared into a mixed solution, the mixed solution is transferred to a reaction kettle with polytetrafluoroethylene as the lining and subjected to a hydrothermal reaction, and a precursor is obtained; the precursor is acidized and calcined, and then TiO2 of a multilevel structure is obtained; urea or cyanurotriamide or dicyandiamide is supported onto the surface of the TiO2 of the multilevel structure, the photocatalyst of the g-C3N4/TiO2 multilevel structure is obtained after calcination, and preparation and supporting of g-C3N4 are completed in one step. The g-C3N4/TiO2 multilevel structure and the preparation method thereof have the advantages that the precursor in use is low-cost inorganic titanium sulfate salt, the preparation technology is simple and the cost is low; the photocatalyst of the g-C3N4/TiO2 multilevel structure prepared through the method has very good photocatalytic activity in the aspects, such as photocatalytically splitting of water into hydrogen and degradation of organic contaminants in water.

Description

technical field [0001] The invention belongs to the field of photocatalytic materials and relates to a g-C 3 N 4 / TiO 2 The preparation method of multi-level structure, specifically, involves a kind of by g-C 3 N 4 / TiO 2 A method for preparing a multi-level structure and high-efficiency photocatalyst self-assembled from pearl chain nanowires. Background technique [0002] Visible light-responsive photocatalytic technology, as a clean and sustainable technology for utilizing solar energy, is one of the most promising means to solve energy and environmental problems. Research hotspots in catalytic technology. TiO 2 Due to its broad application prospects in the field of photocatalysis, it has attracted much attention, but TiO 2 It is a wide bandgap semiconductor material, which only responds to ultraviolet light, and can only use less than 5% of the ultraviolet light in sunlight, which limits its practical application. Graphite carbon nitride (g-C 3 N 4 ), as a typi...

Claims

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Application Information

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IPC IPC(8): B01J27/24C01B3/04C02F1/30C02F101/30
CPCB01J27/24B01J35/004C01B3/042C01B2203/0277C01B2203/1041C02F1/30C02F2101/30C02F2101/308C02F2305/10Y02E60/36Y02W10/37
Inventor 王德宝宋彩霞周艳红孙欣欣牟红宇樊亚鹏
Owner 东营睿港管道工程有限责任公司
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