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Preparation method of core-shell structure nano-rod photocatalyst

A core-shell structure, photocatalyst technology, applied in the field of chemistry, can solve the problems of expensive equipment, uncontrollable nanoshell thickness, and many nanoshell defects, and achieves improved photocatalytic activity, improved photocatalytic activity, and surface coating. tight effect

Active Publication Date: 2017-11-24
RES INST OF XIAN JIAOTONG UNIV & SUZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The object of the present invention is to provide a kind of TiO 2 @Cd 0.9 Zn 0.1 The preparation method of nanorod photocatalyst with S core-shell structure, to solve the problem of preparing nanorod photocatalyst TiO in the prior art 2 There are many defects in the nanoshell, TiO 2 Technical problems such as uncontrollable nanoshell thickness and expensive equipment

Method used

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  • Preparation method of core-shell structure nano-rod photocatalyst
  • Preparation method of core-shell structure nano-rod photocatalyst
  • Preparation method of core-shell structure nano-rod photocatalyst

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Experimental program
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Embodiment 1

[0044] 1) Add 1mmol of Cd 0.9 Zn 0.1 S nanorods were dispersed in a three-necked bottle containing a mixed solution of 18mL ethylene glycol (EG) and 2mL water, preheated to 90°C in an oil bath and kept warm for 30min;

[0045] 2) will be compared with Cd 0.9 Zn 0.1 Tetrabutyl titanate (TBOT) with an S molar ratio of 0.05 was dissolved in 10 mL of ethylene glycol (EG) and extracted with a 10 mL syringe, and this solution was added to the obtained Cd at a rate of 0.5 mL / h using a mini syringe pump. 0.9 Zn 0.1 S suspension;

[0046] 3) Centrifuge the above solution, and ultrasonically disperse and wash it with deionized water and absolute ethanol until the upper liquid is clear after centrifugation;

[0047] 4) The solid obtained after the above centrifugation was dried in a vacuum oven at 60°C for 10 hours and then ground to obtain TiO 2 @Cd 0.9 Zn 0.1 S core-shell structure nanorod photocatalyst.

[0048] figure 1 a shows the TiO obtained in Example 1 2 @Cd 0.9 Zn ...

Embodiment 2

[0050] 1) Add 1mmol of Cd 0.9 Zn 0.1 S nanorods were dispersed in a three-necked bottle containing a mixed solution of 18mL ethylene glycol (EG) and 2mL water, preheated to 90°C in an oil bath and kept warm for 30min;

[0051] 2) will be compared with Cd 0.9 Zn 0.1 Tetrabutyl titanate (TBOT) with an S molar ratio of 0.1 was dissolved in 10 mL of ethylene glycol (EG) and extracted with a 10 mL syringe, and this solution was added to the obtained Cd at a rate of 0.5 mL / h using a mini-syringe pump. 0.9 Zn 0.1 S suspension;

[0052] 3) Centrifuge the above solution, and ultrasonically disperse and wash it with deionized water and absolute ethanol until the upper liquid is clear after centrifugation;

[0053] 4) The solid obtained after the above centrifugation was dried in a vacuum oven at 60°C for 10 hours and then ground to obtain TiO 2 @Cd 0.9 Zn 0.1 S core-shell structure nanorod photocatalyst.

[0054] figure 2 a shows the TiO obtained in Example 2 2 @Cd 0.9 Zn ...

Embodiment 3

[0056] 1) Add 1mmol of Cd 0.9 Zn 0.1 S nanorods were dispersed in a three-necked bottle containing a mixed solution of 18mL ethylene glycol (EG) and 2mL water, preheated to 90°C in an oil bath and kept warm for 30min;

[0057] 2) will be compared with Cd 0.9 Zn 0.1 Tetrabutyl titanate (TBOT) with an S molar ratio of 0.25 was dissolved in 10 mL of ethylene glycol (EG) and extracted with a 10 mL syringe, and this solution was added to the obtained Cd at a rate of 0.5 mL / h using a mini-syringe pump. 0.9 Zn 0.1 S suspension;

[0058] 3) Centrifuge the above solution, and ultrasonically disperse and wash it with deionized water and absolute ethanol until the upper liquid is clear after centrifugation;

[0059] 4) The solid obtained after the above centrifugation was dried in a vacuum oven at 60°C for 10 hours and then ground to obtain TiO 2 @Cd 0.9 Zn 0.1 S core-shell structure nanorod photocatalyst.

[0060] image 3 a shows the TiO obtained in Example 3 2 @Cd 0.9 Zn 0....

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Abstract

The invention discloses a preparation method of a TiO2@Cd0.9Zn0.1S core-shell structure nano-rod photocatalyst. The preparation method comprises the following steps: S1, dispersing Cd0.9Zn0.1S nanorods into a glycol-containing aqueous solution to obtain suspension liquid; S2, dissolving a certain amount of tetrabutyl titanate into glycol, and rapidly adding into the above suspension liquid; S3, washing and drying the product obtained in the step S2 to obtain a target product. In the TiO2@Cd0.9Zn0.1S core-shell structure nano-rod photocatalyst prepared according to the preparation method, the TiO2 core layer is wrapped tightly and does not have defects, so the stability of the Cd0.9Zn0.1S photocatalyst is greatly improved; due to formation of an II-type energy band structure, the photocatalytic activity is further improved.

Description

technical field [0001] The invention belongs to the field of chemical technology, relates to the field of synthesis and preparation of nanomaterials and the field of hydrogen production by photocatalytic water splitting, in particular to a method for preparing a core-shell structure nanorod photocatalyst with controllable shell thickness. Background technique [0002] The "13th Five-Year Plan" outline originally proposed the scientific development concept of "green development", so building a clean and low-carbon energy system has become an important proposition in the plan. In order to reduce the dependence on fossil energy and carbon emissions, the development of clean and efficient renewable energy is imminent. Hydrogen energy is regarded as a high-quality energy that can promote the sustainable development of human society due to its advantages such as high combustion calorific value, clean combustion products and wide sources. Utilizing solar photocatalytic water split...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/04C01B3/04
CPCC01B3/042B01J27/04C01B2203/1088C01B2203/0277B01J35/398B01J35/39Y02E60/36
Inventor 刘茂昌薛飞符文龙沈少华
Owner RES INST OF XIAN JIAOTONG UNIV & SUZHOU
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