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H-CNCs/TiO2 composite photocatalyst, and preparation method and application thereof

A photocatalyst and catalyst technology, applied in organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve problems such as hindering the application of TiO2 and the inability to respond to visible light, and achieve Increased specific surface area, low cost, and readily available raw materials

Inactive Publication Date: 2017-02-08
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But since TiO 2 The forbidden band width is 3.2ev, and it can only be excited by ultraviolet light with a wavelength less than 380nm; while there are only about 4% of ultraviolet light in sunlight, and it cannot respond to the remaining about 96% of visible light.
In addition, when TiO 2 When irradiated by sunlight, the electron-hole pairs excited by sunlight are easy to recombine rapidly inside, which greatly hinders the TiO 2 Applications in the Field of Practical Photocatalysis

Method used

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  • H-CNCs/TiO2 composite photocatalyst, and preparation method and application thereof
  • H-CNCs/TiO2 composite photocatalyst, and preparation method and application thereof
  • H-CNCs/TiO2 composite photocatalyst, and preparation method and application thereof

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Embodiment 1

[0045] The present invention H-CNCs / TiO 2 A composite photocatalyst, which simultaneously supports titanium dioxide and grafted hemin on the surface of carbon nanocages; it is prepared by the following method:

[0046] Step 1, add 0.05g CNCs, 10mL butyl titanate and 4mL acetic acid into 40mL absolute ethanol, stir for 2 hours under a magnetic stirrer, make the CNCs reach a suspension state, and obtain a mixed solution A;

[0047] Step 2, put the mixed solution A in a 100mL polytetrafluoroethylene liner, put it into the reactor, and put it in an oven at 180°C for 6 hours;

[0048] Step 3, washing, centrifuging and drying the reacted material to obtain CNCs / TiO 2 ;

[0049] Step 4, weigh a certain amount of CNCs / TiO 2 Soluble in HNO with a concentration of 8mol / L 3 In solution, CNCs / TiO 2 in HNO 3 The concentration in the solution was 10g / L, stirred in a water bath at 50°C for 8h, then filtered and dried to obtain acidified CNCs / TiO 2 ;

[0050] Step 5, weigh a certain a...

Embodiment 2

[0052] The present invention H-CNCs / TiO 2 A composite photocatalyst, which simultaneously supports titanium dioxide and grafted hemin on the surface of carbon nanocages; it is prepared by the following method:

[0053] Step 1, add 0.05g CNCs, 10mL butyl titanate and 4mL acetic acid into 40mL absolute ethanol, stir for 2 hours under a magnetic stirrer, make the CNCs reach a suspension state, and obtain a mixed solution A;

[0054] Step 2, put the mixed solution A in a 100mL polytetrafluoroethylene liner, put it into the reactor, and put it in an oven at 180°C for 6 hours;

[0055] Step 3, washing, centrifuging and drying the reacted material to obtain CNCs / TiO 2 ;

[0056] Step 4, weigh a certain amount of CNCs / TiO 2 Soluble in HNO with a concentration of 8mol / L 3 In solution, CNCs / TiO 2 in HNO 3 The concentration in the solution was 10g / L, stirred in a water bath at 50°C for 8h, then filtered and dried to obtain acidified CNCs / TiO 2 ;

[0057] Step 5, weigh a certain a...

Embodiment 3

[0059] The present invention H-CNCs / TiO 2 A composite photocatalyst, which simultaneously supports titanium dioxide and grafted hemin on the surface of carbon nanocages; it is prepared by the following method:

[0060] Step 1, add 0.05g CNCs, 10mL butyl titanate and 4mL acetic acid into 40mL absolute ethanol, stir for 2 hours under a magnetic stirrer, make the CNCs reach a suspension state, and obtain a mixed solution A;

[0061] Step 2, put the mixed solution A in a 100mL polytetrafluoroethylene liner, put it into the reactor, and put it in an oven at 180°C for 6 hours;

[0062] Step 3, washing, centrifuging and drying the reacted material to obtain CNCs / TiO 2 ;

[0063] Step 4, weigh a certain amount of CNCs / TiO 2 Soluble in HNO with a concentration of 8mol / L 3 In solution, CNCs / TiO 2 in HNO 3 The concentration in the solution was 10g / L, stirred in a water bath at 50°C for 8h, then filtered and dried to obtain acidified CNCs / TiO 2 ;

[0064] Step 5, weigh a certain a...

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Abstract

The invention discloses an H-CNCs / TiO2 composite photocatalyst. The photocatalyst is prepared by grafting chlorhematin while loading titanium dioxide on the surface of a carbon nano-cage, wherein the grafting quantity of the chlorhematin is 3.2 to 12.8 mu mol / g. The invention also discloses a preparation method of the H-CNCs / TiO2 composite photocatalyst and application of the H-CNCs / TiO2 composite photocatalyst to adsorption and degradation of crystal violet dye molecules. The specific surface area of the H-CNCs / TiO2 composite photocatalyst provided by the invention is further increased, the adsorption capability is further enhanced, the photocatalytic activity is further improved, and the H-CNCs / TiO2 composite photocatalyst can adsorb and degrade organic pollutants in water under ultraviolet light and visible light, particularly has extremely high adsorption capability and photocatalystic activity on the crystal violet dye molecules (CV) in a water body, and has a good removing effect.

Description

technical field [0001] The present invention relates to a kind of H-CNCs / TiO 2 Composite photocatalysts, also involving the aforementioned H-TiO 2 The invention relates to a preparation method and application of / CNCs composite photocatalyst, belonging to the field of photocatalyst. Background technique [0002] In recent years, the annual output of dyestuffs in my country has continued to grow. The dye industry is a high energy consumption and high pollution industry. According to relevant data, about 744m3 of wastewater is discharged for every 1t of dye produced. The raw materials for the production of dyes mainly include organic substances such as anthraquinones, aromatics, anilines, phenols and nitrobenzenes. Moreover, in the process of dye production, a large amount of acid and alkali will be used. If the post-treatment is not proper, these substances may enter the dye wastewater, causing the COD value and PH value of the wastewater to exceed the standard, and then ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/38B01J20/26B01J20/28B01J20/30C02F1/28C02F1/30C02F1/32C02F1/72
CPCC02F1/288C02F1/30C02F1/32C02F1/725B01J20/26B01J20/28054B01J31/38C02F2101/308B01J35/39Y02W10/37
Inventor 杨汉培朱鸿宇孙慧华聂坤崔素珍高照郭润强毛静涛
Owner HOHAI UNIV