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A kind of preparation ag/agcl/natao 3 Method of Plasma Composite Photocatalyst

A plasma and catalyst technology, applied in the field of nanocomposite photocatalyst preparation, achieves the effects of complete crystallization, good dispersibility and regular morphology

Active Publication Date: 2017-11-17
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Alkaline earth metal sodium tantalate (NaTaO 3 ) conduction band consists of Ta5d orbitals, which are much higher than Ti3d orbitals, so it is similar to titanium dioxide (TiO 2 ) compared with photoexcited sodium tantalate has a stronger reduction ability, which is more conducive to the efficient photocatalytic decomposition of organic matter; currently, Xia Li et al. (J. Phys. Chem. C 2009,113,19411–19418 .) The morphological changes of sodium tantalate synthesized by hydrothermal method under different time and temperature, different ratios of sodium hydroxide and tantalum pentoxide were studied, and finally cubic sodium tantalate was prepared, and verified in the ultraviolet The effect of decomposing methylene blue under light; however, in the solar spectrum, the ultraviolet light is less than 5%, and the visible light region is more than 50%. Therefore, some researchers use Ag / AgCl loaded on the surface of nano-semiconductor compounds to construct a plasmon resonance effect. Composite system; this system has the effect of efficiently utilizing visible light. Jiaguo Yu et al. (J. Phys. Chem. C 2009, 113, 16394–16401) prepared Ag / AgCl loaded on the surface of titanium dioxide nanotube arrays, Sara Naghizadeh-Alamdari et al. (Solid StateSciences 2015, 40, 111-120) prepared Ag / AgCl loaded on the surface of ZnO. This kind of composite photocatalyst using plasma is widely used. However, the construction of Ag / AgCl loaded on the surface of nano-sodium tantalate has no apps yet

Method used

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  • A kind of preparation ag/agcl/natao <sub>3</sub> Method of Plasma Composite Photocatalyst
  • A kind of preparation ag/agcl/natao <sub>3</sub> Method of Plasma Composite Photocatalyst
  • A kind of preparation ag/agcl/natao <sub>3</sub> Method of Plasma Composite Photocatalyst

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Effect test

Embodiment 1

[0016] Example 1 Ag / AgCl / NaTaO 3 Preparation of Plasmonic Nanocomposite Photocatalysts

[0017] Add 400 mg of nano-sodium tantalate to 25 mL of silver nitrate solution containing 1.6, 3.2, 4.8, and 6.4 g / L respectively, stir magnetically, then add excess hydrochloric acid, continue stirring for 2 hours, and then place it under a 300 W xenon lamp After irradiating for 20 minutes, after the reaction, the obtained product was washed with deionized water, filtered, and dried in a constant temperature drying oven at 60°C.

Embodiment 2

[0018] Example 2 Ag / AgCl / NaTaO 3 Characterization and analysis of plasmonic nanocomposite photocatalysts

[0019] Such as figure 1 As shown, it can be seen from the figure that with the increase of the amount of Ag / AgCl, the peaks of AgCl and Ag gradually appeared, indicating that we successfully prepared Ag / AgCl / NaTaO 3 Plasmonic nanocomposite photocatalysts.

[0020] Such as figure 2 As shown, pure NaTaO can be seen in (A) 3 For nanoblocks, the presence of Ag and AgCl nanoparticles can be seen in (B).

[0021] Such as image 3 As shown, the spectrum shows the presence of silver, chlorine, tantalum, sodium, and oxygen elements.

[0022] Such as Figure 4 As shown, the presence of silver and elemental chlorine can be clearly seen in the figure.

Embodiment 3

[0023] Example 3 Ag / AgCl / NaTaO 3 Visible light catalytic activity experiments of plasmonic nanocomposite photocatalysts

[0024] (1) Prepare a rhodamine B solution with a concentration of 10 mg / L, and place the prepared solution in a dark place.

[0025] (2) Weigh 0.1 g of Ag / AgCl / NaTaO3 plasmonic nanocomposite photocatalyst, place them in the photocatalytic reactor respectively, add 100 mL of the target degradation solution prepared in step (1), stir magnetically for 30 min and wait for the photocatalyst to be composited. After the catalyst is evenly dispersed, turn on the water source and the light source to carry out the photocatalytic degradation experiment.

[0026] (3) Draw up the photocatalytic degradation solution in the reactor every 10 minutes, centrifuge and use it for the measurement of UV-Vis absorbance.

[0027] (4) by Figure 5 It can be seen that the prepared nanocomposite photocatalysts have excellent visible light catalytic activity, especially Ag / AgCl and...

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Abstract

The present invention relates to an alkaline earth metal sodium tantalate, especially to a method for preparing an Ag / AgCl / NaTaO3 plasma composite photocatalyst by using hydrochloric acid, silver nitrate and sodium tantalate as raw materials. The method comprises: adding sodium tantalate to a silver nitrate solution, adding an excess amount of hydrochloric acid under stirring, maintaining the stirring state for 2 h, irradiating for 20 min under 300 W xenon lamp, filtering after completing the reaction, washing, and drying to obtain the final product. According to the present invention, the results of the Rhodamine B (RhB) degradation experiment under visible light prove that the prepared composite photocatalyst has good photocatalytic activity.

Description

technical field [0001] The present invention relates to alkaline earth metal sodium tantalate, in particular to a kind of preparation of Ag / AgCl / NaTaO with hydrochloric acid, silver nitrate and sodium tantalate as raw materials. 3 A method for plasma composite photocatalyst, especially a method for preparing a nanocomposite photocatalyst with simple preparation process and good visible light catalytic activity. technical background [0002] Alkaline earth metal sodium tantalate (NaTaO 3 ) conduction band consists of Ta5d orbitals, which are much higher than Ti3d orbitals, so it is similar to titanium dioxide (TiO 2 ) compared with photoexcited sodium tantalate has a stronger reduction ability, which is more conducive to the efficient photocatalytic decomposition of organic matter; currently, Xia Li et al. (J. Phys. Chem. C 2009,113,19411–19418 .) The morphological changes of sodium tantalate synthesized by hydrothermal method under different time and temperature, different...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/10C02F1/30C02F101/38
Inventor 施伟东徐东波宋澄杰罗必富樊明山陈必义
Owner JIANGSU UNIV
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