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g-C3N4/TiO2 (graphite-carbon nitride/titanium dioxide) nanowire assembly structure photocatalyst and preparation method thereof

A technology for assembling structures and photocatalysts, applied in physical/chemical process catalysts, chemical instruments and methods, water/sludge/sewage treatment, etc. The preparation process is cumbersome and other problems, to achieve the effect of easy control of dispersion, low cost and simple process

Active Publication Date: 2017-09-01
大庆中环评价检测有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the g-C prepared by the prior art 3 N 4 / TiO 2 The shape of the composite photocatalyst is difficult to control, the preparation process is cumbersome, the specific surface area of ​​the prepared composite photocatalyst is low, and the cost is high. It provides a homogeneously dispersed g-C 3 N 4 Modified TiO 2 Preparation method of nanowire assembled structure photocatalyst

Method used

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  • g-C3N4/TiO2 (graphite-carbon nitride/titanium dioxide) nanowire assembly structure photocatalyst and preparation method thereof
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  • g-C3N4/TiO2 (graphite-carbon nitride/titanium dioxide) nanowire assembly structure photocatalyst and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0019] 1. Dissolve 0.885g potassium titanium oxalate in deionized water, then add 4ml 30% H 2 o 2 , the solution turns orange-yellow, stir evenly, then add 8ml of NaOH solution with a concentration of 10M;

[0020] 2. Stir the above mixed solution evenly, transfer it to a reaction kettle lined with polytetrafluoroethylene, heat and react at 180°C for 3 hours, take it out and cool it to room temperature, centrifuge, and wash three times with deionized water and ethanol;

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

[0022] 4. Dissolve urea with ethanol, add the titanium dioxide precursor obtained in step (3), so that the mass ratio of urea to titanium dioxide precursor is 10:1, heat and evaporate the ethanol to dryness, and heat up ...

Embodiment 2

[0024] 1. Dissolve 0.885g potassium titanium oxalate in deionized water, then add 4ml 30% H 2 o 2 , the solution turns orange-yellow, stir evenly, then add 8ml of NaOH solution with a concentration of 10M;

[0025] 2. Stir the above mixed solution evenly, transfer it to a reaction kettle lined with polytetrafluoroethylene, heat and react at 180°C for 3 hours, take it out and cool it to room temperature, centrifuge, and wash three times with deionized water and ethanol;

[0026] 3. Add the product obtained in step (2) to soak in hydrochloric acid with a concentration of 0.1M for 12 hours, then separate the product after acid soaking, wash it with deionized water until neutral, wash it with alcohol three times, and dry it in an oven to obtain the precursor ;

[0027] 4. Dissolve urea with ethanol, add the titanium dioxide precursor obtained in step (3), so that the mass ratio of urea to titanium dioxide precursor is 20:1, heat and evaporate the ethanol to dryness, and heat up ...

Embodiment 3

[0029] 1. Dissolve 0.885g potassium titanium oxalate in deionized water, then add 4ml 30% H 2 o 2 , the solution turns orange-yellow, stir evenly, then add 8ml of NaOH solution with a concentration of 10M;

[0030] 2. Stir the above mixed solution evenly, transfer it to a reaction kettle lined with polytetrafluoroethylene, heat and react at 180°C for 3 hours, take it out and cool it to room temperature, centrifuge, and wash three times with deionized water and ethanol;

[0031] 3. Add the product obtained in step (2) to soak in hydrochloric acid with a concentration of 0.1M for 12 hours, then separate the product after acid soaking, wash it with deionized water until it is neutral, wash it with alcohol three times, and dry it in an oven to obtain the precursor ;

[0032] 4. Dissolve urea with ethanol, add the titanium dioxide precursor obtained in step (3), so that the mass ratio of urea to titanium dioxide precursor is 5:1, heat and evaporate the ethanol to dryness, and hea...

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Abstract

The invention discloses a g-C3N4 / TiO2 (graphite-carbon nitride / titanium dioxide) nanowire assembly structure photocatalyst and a preparation method thereof. The g-C3N4 / TiO2 nanowire assembly structure photocatalyst is characterized in that inorganic titanium potassium oxalate, hydrogen peroxide, urea (or melamine and dicyandiamide) and the like are used as raw materials; the urea (or melamine and dicyandiamide) is loaded onto the surface of a TiO2 precursor of a nanowire assembly structure, so as to complete the condensation pyrolysis of the TiO2 precursor and the urea (or melamine and dicyandiamide) and the loading of g-C3N4 by one step. The preparation method comprises the following steps of firstly, dissolving the titanium potassium oxalate into deionized water, adding H2O2 (hydrogen peroxide) and NaOH (sodium hydroxide) solutions, transferring the obtained mixed solution into a reaction kettle lined with polytetrafluoroethylene to perform hydrothermal reaction, centrifuging, washing, and drying; soaking by diluted hydrochloric acid, washing to neural state, and drying; adding the urea (or melamine and dicyandiamide) dissolved by hot ethanol, evaporating the ethanol, and roasting, so as to obtain the uniformly dispersed g-C3N4-modified TiO2 nanowire assembly structure photocatalyst. The preparation method has the advantages that the technology is simple, the conditions are mild, and the cost is low; the product dispersivity and stability are high, and the dispersivity of g-C3N4 is easily controlled.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic materials and their preparation, in particular to a g-C 3 N 4 / TiO 2 The preparation method of nanowire assembly structure photocatalyst, specifically, relates to a homogeneously dispersed g-C 3 N 4 Modified TiO 2 Preparation method of nanowire assembled hierarchical structure photocatalyst. Background technique [0002] Photocatalytic technology can be used to decompose water to produce hydrogen and degrade organic dye pollutants in water, so as to alleviate energy shortage and solve environmental pollution, which are two major issues related to human survival and social development. Titanium dioxide nanomaterials, as one of the most promising photocatalysts, are mainly used in the photolysis of water to produce hydrogen, which alleviates the energy crisis, and are also used in the photocatalytic degradation of organic pollutants, which contribute to the control of environmental pollu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C02F1/30C01B3/04C02F101/30
CPCC01B3/042C02F1/30B01J27/24C02F2101/308C02F2305/10B01J35/39B01J35/40B01J35/58Y02E60/36
Inventor 王德宝宋彩霞张波牟红宇张德亮马娇娇赵存
Owner 大庆中环评价检测有限公司
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