Preparation method for recyclable photocatalysis material

A photocatalytic material, the technology of hydroxyapatite, applied in the field of photocatalysis, can solve the problems of low stability and reusability, and achieve the effect of reusability, enhanced utilization rate and excellent photocatalytic performance

Active Publication Date: 2016-12-14
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the certain water solubility of silver phosphate, the stability and reusability of the composite system are not high.

Method used

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  • Preparation method for recyclable photocatalysis material
  • Preparation method for recyclable photocatalysis material
  • Preparation method for recyclable photocatalysis material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Prepare 0.5 mol / l CaCl with a Ca:P atomic ratio of 1.67 2 aqueous solution and 0.5mol / l Na 2 HPO 4 12H 2 O aqueous solution was obtained by hydrothermal synthesis at a pH (adjusted by NaOH) of 11, wherein the hydrothermal temperature was 150 °C and the reaction time was 15 h.

[0024] (2) Use ethylene glycol as the carbon source, add carbon source according to 50% of the volume of the airtight container, heat to 200°C for 5 hours, and prepare carbon dots.

[0025] (3) Mix 0.3g of hydroxyapatite powder with 10ml of carbon dot solution at room temperature, stir the solution uniformly with ultrasonic stirring, put the mixed solution into a 50mL polytetrafluoroethylene reactor, and heat it at 140°C After 4 hours of heat preservation, the hydroxyapatite / carbon dot composite powder (HA / CDs) was obtained.

[0026] (4) Weigh 0.1g of hydroxyapatite and disperse it in 25ml of 1g / L AgNO 3 in aqueous solution. The mixed solution was magnetically stirred for 4 h in the dar...

Embodiment 2

[0031] (1) Prepare 0.5 mol / l CaCl with a Ca:P atomic ratio of 1.67 2 and 0.5mol / l Na 2 HPO 4 12H 2 O aqueous solution, obtained by hydrothermal synthesis under the condition of pH 11, wherein the hydrothermal temperature is 150°C, and the reaction time is 15h.

[0032] (2) Use ethylene glycol as the carbon source, add carbon source according to 50% of the volume of the airtight container, heat to 200°C for 5 hours, and prepare carbon dots.

[0033](3) Mix 0.3g of hydroxyapatite powder with 10ml of carbon dot solution at room temperature, and stir ultrasonically to make the solution evenly mixed. The mixed solution was put into a 50mL polytetrafluoroethylene reactor and kept at 140°C for 4h to obtain hydroxyapatite / carbon dot composite powder (HA / CDs).

[0034] (4) Weigh 0.1g hydroxyapatite / carbon dot composite powder and disperse in 25ml 2g / L AgNO 3 in aqueous solution. The mixed solution was magnetically stirred for 4 h in the dark, and washed several times by centrifug...

Embodiment 3

[0038] (1) Prepare 0.5 mol / l CaCl with a Ca:P atomic ratio of 1.67 2 and 0.5mol / l Na 2 HPO 4 12H 2 O aqueous solution, obtained by hydrothermal synthesis under the condition of pH 11, wherein the hydrothermal temperature is 150°C, and the reaction time is 15h.

[0039] (2) Use ethylene glycol as the carbon source, add carbon source according to 50% of the volume of the airtight container, heat to 200°C for 5 hours, and prepare carbon dots.

[0040] (3) Mix 0.3g of hydroxyapatite powder with 10ml of carbon dot solution at room temperature, and stir ultrasonically to make the solution evenly mixed. The mixed solution was put into a 50mL polytetrafluoroethylene reactor and kept at 140°C for 4h to obtain hydroxyapatite / carbon dot composite powder (HA / CDs).

[0041] (4) Weigh 0.1g hydroxyapatite / carbon dot composite powder and disperse in 25ml 4g / L AgNO 3 in aqueous solution. The mixed solution was magnetically stirred for 4 h in the dark, and washed several times by centrifu...

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Abstract

The invention specifically relates to a preparation method for a recyclable photocatalysis material, belonging to the field of photocatalysis technology. The preparation method comprises the following steps: subjecting an aqueous solution of CaCl2 and an aqueous solution of Na2HPO4.12H2O to a hydrothermal reaction so as to obtain hydroxyapatite powder; then preparing carbon points from any one selected from a group consisting of glycol, citric acid and glucose; preparing hydroxyapatite / carbon point composite powder from the hydroxyapatite powder and the carbon points; adding an aqueous solution of AgNO3 into the hydroxyapatite powder to prepare a hydroxyapatite / silver phosphate composite system; and adding the hydroxyapatite / carbon point composite powder into an aqueous solution of AgNO3 so as to obtain a hydroxyapatite / carbon point / silver phosphate composite system. The hydroxyapatite / carbon point / silver phosphate composite system has improved light absorption and photocatalysis capabilities and enhanced stability and repeated usability.

Description

technical field [0001] The invention relates to the technical field of photocatalysis, in particular to a method for preparing a recyclable photocatalytic material. Background technique [0002] In recent years, environmental pollution and energy shortages have become increasingly serious. Photocatalytic technology uses inexhaustible solar energy as energy to degrade pollutants, which can be said to be an important way to "kill two birds with one stone" to solve the environment and energy. Therefore, it is of great importance to study the preparation of an efficient, stable, and reusable photocatalyst that responds to visible light. [0003] Hydroxyapatite (HA for short) is one of the few inorganic mineral materials with good biological activity and compatibility. With the continuous research on hydroxyapatite, it is found that because of its special structure and composition (the surface is rich in PO 4 , OH group), strong ion exchange capacity, adjustable surface acid an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/18
CPCB01J27/1817B01J35/004
Inventor 常青董英鸽胡胜亮王延忠刘炜薛超瑞
Owner ZHONGBEI UNIV
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