Ag-C co-doped TiO2-perchloric acid pyranium salt photocatalyst and preparation method thereof

A technology of perchloric acid pyranium salt and photocatalyst, which is applied in the field of Ag-C co-doped TiO2-perchloric acid pyranium salt photocatalyst, can solve the difficulty of recycling organic dye-based photocatalysts, low redox potential, and photocatalysts. problems such as poor catalytic performance, to achieve the effect of improving practicability and service life, increasing catalytic activity, and high oxidation potential

Pending Publication Date: 2020-02-11
罗金标
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides an Ag-C co-doped TiO 2 - Perchloric acid pyryl salt photocatalyst and its preparation method solve the problem that the light absorption band of the organic dye photocatalyst is narrow and the redox potential is low, which leads to its poor photocatalytic performance, and solves the problem of organic dye photocatalyst It is difficult to recycle dye-based photocatalysts, and it is easy to cause environmental pollution

Method used

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  • Ag-C co-doped TiO2-perchloric acid pyranium salt photocatalyst and preparation method thereof

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preparation example Construction

[0023] The preparation method of Ag-C co-doped TiO2 includes the following steps: add 200-500mL of absolute ethanol to the hydrothermal synthesis automatic reaction kettle, add 3-5 parts of silver nitrate and stir to dissolve at a constant speed, and then add 70-82 parts of titanic acid in sequence After isopropyl ester, 10-15 parts of glucose and 5-10 parts of cetyltrimethylammonium bromide are stirred and dissolved at a constant speed, then slowly add dilute hydrochloric acid drop by drop to adjust the pH of the solution to 3-4, and set the temperature of the automatic reactor to 120 -130°C, stirring at a constant speed for 5-7h. After the reaction, the material is concentrated under reduced pressure to remove ethanol, and the solid mixture is placed in a tubular resistance furnace. The heating rate is 5°C / min, and the temperature is raised to 520-550°C and maintained at the temperature. Calcined for 4-6 hours, put the calcined product in a high-energy planetary ball mill, se...

Embodiment 1

[0031] (1) Preparation of Ag-C co-doped TiO The preparation method comprises the following steps: add 200mL of absolute ethanol to the hydrothermal synthesis automatic reaction kettle, add 3 parts of silver nitrate and stir and dissolve at a uniform speed, then add 82 parts of isopropyl titanate successively After the ester, 10 parts of glucose and 5 parts of cetyltrimethylammonium bromide were stirred and dissolved at a constant speed, dilute hydrochloric acid was slowly added dropwise to adjust the pH of the solution to 3, and the temperature of the automatic reactor was set to 120°C, and the reaction was stirred for 5 hours at a constant speed. After the end, the material was concentrated under reduced pressure to remove ethanol, and the solid mixture was placed in a tubular resistance furnace at a heating rate of 5°C / min, raised to 520°C and maintained at the temperature for calcination for 4 hours, and the calcined product was placed in a high-energy planetary ball mill, se...

Embodiment 2

[0036] (1) Preparation of Ag-C co-doped TiO The preparation method comprises the following steps: add 200mL of absolute ethanol to the hydrothermal synthesis automatic reaction kettle, add 3 parts of silver nitrate and stir and dissolve at a uniform speed, then add 82 parts of isopropyl titanate successively After the ester, 10 parts of glucose and 5 parts of cetyltrimethylammonium bromide were stirred and dissolved at a constant speed, dilute hydrochloric acid was slowly added dropwise to adjust the pH of the solution to 3, the temperature of the automatic reactor was set to 130°C, and the reaction was stirred for 5 hours at a constant speed. After the end, the material was concentrated under reduced pressure to remove ethanol, and the solid mixture was placed in a tubular resistance furnace at a heating rate of 5°C / min, raised to 520°C and maintained at the temperature for calcination for 4 hours, and the calcined product was placed in a high-energy planetary ball mill, set T...

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Abstract

The invention relates to the technical field of chemical reaction photocatalysts, and discloses an Ag-C co-doped TiO2-perchloric acid pyranium salt photocatalyst and a preparation method thereof. TheAg-C co-doped TiO2-perchloric acid pyranium salt photocatalyst is prepared from the following formula materials: a benzaldehyde compound, a phenylacetaldehyde compound, phosphorus oxychloride and Ag-Cco-doped TiO2. According to the Ag-C co-doped TiO2-perchloric acid pyranium salt photocatalyst and the preparation method thereof, when perchloric acid pyranium salt absorbs solar energy, electrons can be absorbed to form an excited state, and high oxidation performance is achieved; C atoms replace O atoms in an interstitial void of TiO2 in the calcination process, a Ti-C bond and C-O bond with higher bond energy and shorter bond length can be formed, the growth of TiO2 grains can be inhibited to a certain extent, the TiO2 is enabled to have a larger specific surface area and active site, Ag+easily captures the electrons in a reaction system, and the negative charge generated is used in the reduction quenching process of the -perchloric acid pyranium salt biological catalysis process, the excited state of the perchloric acid pyranium salt can absorb the charge and reduce to a ground state, and the catalyst cycle process is achieved.

Description

technical field [0001] The invention relates to the technical field of chemical reaction photocatalysts, in particular to an Ag-C co-doped TiO 2 -perchloric acid pyryl salt photocatalyst and its preparation method. Background technique [0002] Finding simple, efficient, green and mild chemical reactions is the goal that chemical scientists are constantly pursuing. As a clean energy source, solar energy has become an important part of energy used by human beings. As an abundant clean energy source, sunlight can drive the occurrence of organic chemical reactions. Visible light The chemical reaction driven by sunlight can become a green and efficient synthetic strategy and serve the production and life of human beings. Although humans have long realized that visible light can be applied to chemical reactions, the development of chemical reactions driven by sunlight is relatively slow. On the one hand, due to Most of the classical photochemical reactions are carried out under ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/38B01J35/02B01J35/10B01J31/02
CPCB01J31/0231B01J31/38B01J35/004B01J35/026B01J35/1004
Inventor 罗金标
Owner 罗金标
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