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Preparation method of in2s3/natao3 composite nano photocatalyst

A nano-photocatalyst and catalyst technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve problems such as composite materials that have not yet been discovered

Active Publication Date: 2019-05-31
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] So far, no one has been found to prepare In 2 S 3 / NaTaO 3 composite material

Method used

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  • Preparation method of in2s3/natao3 composite nano photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Example 1 In 2 S 3 / NaTaO 3 Preparation of Composite Nanophotocatalyst

[0017] (1) Weigh 0.221g Ta respectively 2 o5 and 0.6g NaOH were added to a 50mL reaction kettle, 30mL deionized water was added, the solution was stirred for 10min to mix well, and then the obtained solution was transferred to a polytetrafluoroethylene-lined reaction kettle, and kept at 140°C for 12h , and then after natural cooling, the cubic NaTaO 3 .

[0018] (2) Weigh 0.2g NaTaO 3 , and then weigh a certain amount of In(NO 3 ) 3 ·5H 2 O was placed in a beaker, and 30 mL of deionized water was added, and stirred for 1 h; then a certain amount of thioacetamide was added to the above solution, and the stirring was continued for 1 h, and the resulting suspension was transferred to a polytetrafluoroethylene-lined reaction kettle, and stirred at 180 ℃ for 12 hours, naturally cooled, washed and dried to obtain the product.

Embodiment 2

[0019] Example 2 In 2 S 3 / NaTaO 3 Characterization of Composite Nanophotocatalysts

[0020] like figure 1 Shown, In 2 S 3 / NaTaO 3 It can be seen from the field emission scanning electron microscope of the composite nanophotocatalyst that In 2 S 3 Nanoparticles are well compounded to NaTaO 3 Cubic surface, NaTaO 3 The cube size is 200-300nm.

[0021] like figure 2 As shown in the XPS figure, it can be seen that there are elements of S, In, O, Ta, and Na.

[0022] like image 3 Shown, In 2 S 3 / NaTaO 3 It can be seen from the solid ultraviolet absorption spectrum of the composite nanophotocatalyst that pure NaTaO 3 There is a strong response in the ultraviolet region, and there is basically no absorption in the visible region. 2 S 3 After compounding, it has a strong response in the visible spectral range, and with the In 2 S 3 As the content increases, the absorption gradually increases.

Embodiment 3

[0023] Example 3 Different contents of In 2 S 3 / NaTaO 3 Visible light catalytic activity experiments of composite photocatalysts

[0024] (1) Prepare a tetracycline solution with a concentration of 100mg / L, and place the prepared solution in a dark place.

[0025] (2) Weigh different contents of In 2 S 3 / NaTaO 3 Put 50mg of composite photocatalyst on the surface into the photocatalytic reactor respectively, add 100mL of the target degradation solution prepared in step (1), and stir magnetically for 60min. Catalytic degradation experiments.

[0026] (3) Draw 5 mL of the photocatalytic degradation solution in the reactor every 30 minutes, and measure its UV-visible absorbance after centrifuging to remove the catalyst.

[0027] (4) by Figure 4 It can be seen that the prepared nanocomposite photocatalysts have excellent visible light catalytic activity, especially In 2 S 3 The sample with 20% content showed the best degradation activity, compared with pure In 2 S 3 ...

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Abstract

The invention relates to a method for preparing a In2S3-NaTaO3 composite nanometer photocatalyst by taking tantalum oxide, sodium hydroxide, indium nitrate and thioacetamide as raw materials. The method is simple in preparation process and low in cost, and the composite nanometer photocatalyst prepared through the method has the good photocatalytic activity. The method comprises the steps that NaTaO3 is firstly weighed, then In(NO3)3.5H2O is weighed and put into a beaker, deionized water is added, and the materials are stirred to be uniform to obtain a solution 1; thioacetamide is weighed and added into the solution 1, and the materials continue to be stirred to be uniform to obtain suspension liquid; the suspension liquid is transferred into a reaction kettle with a polytetrafluoroethylene lining, 180-DEG C constant temperature is kept for 12 h, after natural cooling is conducted, washing and drying are conducted, and the In2S3-NaTaO3 composite nanometer photocatalyst is obtained.

Description

technical field [0001] The present invention relates to a kind of tantalum oxide (Ta 2 o 5 ), sodium hydroxide (NaOH), indium nitrate (In(NO 3 ) 3 ·5H 2 O) and thioacetamide (CH 3 CSNH 2 ) as raw material to prepare In 2 S 3 / NaTaO 3 The method of composite nano photocatalyst is a method with simple preparation process and low cost, and the prepared composite nano photocatalyst has better photocatalytic activity. Background technique [0002] NaTaO 3 Due to their non-toxicity to the environment, good stability and excellent photocatalytic activity, semiconductors have broad applications in environmental protection, such as air purification, water splitting to produce hydrogen, and sewage purification. However, it has a wide band gap (Eg=4.0eV) and can only respond to ultraviolet light, which only accounts for 4%-6% of sunlight, while visible light accounts for a large proportion of sunlight. Therefore, it is necessary to modify it to make it responsive to visible ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/04
CPCB01J27/04B01J35/004
Inventor 施伟东罗必富陈敏
Owner JIANGSU UNIV
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