Preparation method of a composition-controllable tin-based oxide and its photocatalytic application

An oxide and photocatalysis technology, which is applied in tin oxide, light water/sewage treatment, energy wastewater treatment, etc., can solve the problems of small product composition modulation space, high preparation cost, and high equipment requirements, and achieve high-efficiency visible light photocatalysis Degradation and decolorization activity, improved degradation rate, and simple preparation process

Active Publication Date: 2018-04-10
HUAIBEI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Most of these methods are cumbersome to operate, have high requirements for equipment, and high preparation costs, and most of them can only prepare a single species of tin-based oxides in a targeted manner, and there is little room for modulation of the product composition.

Method used

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  • Preparation method of a composition-controllable tin-based oxide and its photocatalytic application
  • Preparation method of a composition-controllable tin-based oxide and its photocatalytic application
  • Preparation method of a composition-controllable tin-based oxide and its photocatalytic application

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Experimental program
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Effect test

Embodiment 1

[0047] This embodiment prepares Sn according to the following steps 2+ / SnO 2 :

[0048] a. Take 1g SnCl 2 2H 2 O was added to a polytetrafluoroethylene container, then 80mL of water was added, and stirred until dissolved to obtain a hydrothermal solution; five samples were made in parallel;

[0049] b. Seal five polytetrafluoroethylene containers filled with hydrothermal solutions and put them into stainless steel hydrothermal kettles, and then place them in blast ovens at 120°C, 140°C, 160°C, 180°C, and 200°C respectively. After heat treatment for 24 hours, the product solution was obtained after natural cooling to room temperature;

[0050] c. The product solution is subjected to centrifugation, washing and vacuum drying at 80°C to obtain Sn 2+ / SnO 2 sample. The obtained sample was light yellow solid, and the color of the sample gradually deepened as the temperature increased.

Embodiment 2

[0052] This embodiment prepares SnO / SnO according to the following steps 2 :

[0053] a. Weigh 1g of SnCl with an electronic balance 2 2H 2 O was added to the polytetrafluoroethylene container, and 0.5g, 1g, 2g, 3g of urea were added respectively, then 80mL of water was added, stirred until dissolved, and a hydrothermal solution was obtained;

[0054] b. Seal the polytetrafluoroethylene container containing the hydrothermal solution and put it into a stainless steel hydrothermal kettle, then place it in a blast oven at 160°C for hydrothermal treatment for 24 hours, and naturally cool to room temperature to obtain the product solution;

[0055] c. The product solution is subjected to centrifugal separation, washing and vacuum drying at 80°C to obtain SnO / SnO 2 . The obtained sample is a gray-black solid, and the color of the sample gradually deepens as the amount of urea increases.

Embodiment 3

[0057] This embodiment prepares SnO according to the following steps 2 :

[0058] a. Take 1g SnCl 2 2H 2 0 and 3g of urea were added to the polytetrafluoroethylene container, then 80mL of water and 1mL of mass concentration were added to be 30% hydrogen peroxide, and the mixture was evenly stirred to obtain a hydrothermal solution;

[0059] b. Seal the polytetrafluoroethylene container containing the hydrothermal solution and put it into a stainless steel hydrothermal kettle, then place it in a blast oven at 160°C for hydrothermal treatment for 24 hours, and naturally cool to room temperature to obtain the product solution;

[0060] c. The product solution is subjected to centrifugal separation, washing and vacuum drying at 80°C to obtain SnO 2 . The obtained sample was a white powdery solid.

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Abstract

The invention discloses a preparation method of a tin-based oxide with controllable composition and its photocatalytic application. By controlling the composition of the hydrothermal solution, four samples with different compositions of Sn2+ / SnO2, SnO / SnO2, SnO or SnO2 can be selectively synthesized; among them, Sn2+ / SnO2 and SnO / SnO2 show high efficiency for methyl orange under visible light Photocatalytic degradation decolorization activity. The invention adopts a one-step hydrothermal method to selectively synthesize these samples, has simple preparation process, cheap and easy-to-obtain raw materials, overcomes the tediousness of traditional synthesis methods and the disadvantages of uncontrollable composition of target products, and has a prospect of popularization and application.

Description

technical field [0001] The invention belongs to the field of material synthesis technology and environmental pollutant treatment, and specifically relates to a preparation method of a tin-based oxide with controllable composition and its photocatalytic application. Background technique [0002] Environmental pollution has become one of the issues of widespread concern in the contemporary era of rapid economic development, and the development of highly efficient, energy-saving, and pollution-free photocatalytic technologies has received special attention. Among all kinds of new technologies, photocatalytic technology is one of the most promising environmentally friendly technologies. It uses the light energy absorbed by the photocatalyst to convert it into chemical energy to decompose organic matter, and the electrons in the semiconductor valence band are excited by light. From the valence band to the conduction band, photogenerated electrons are formed in the conduction band...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/14C02F1/30C01G19/02
CPCY02W10/37
Inventor 付先亮王静慧孟苏刚陈士夫
Owner HUAIBEI NORMAL UNIVERSITY
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