Visible-light photocatalytic material and preparation method thereof

A photocatalytic material and visible light technology, applied in the field of photocatalytic materials, can solve the problems of unfavorable large-scale production of organic solvents, limited space for improvement, cumbersome preparation process, etc., achieve good visible light absorption, increase separation, and simple preparation process. Effect

Inactive Publication Date: 2013-03-20
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology describes methods used to create nanoparticles that can absorb ultraviolet (UV) rays effectively without reabsorbing other colors or particles from surrounding environments like sunlight. These techniques allow for efficient use of UV radiation by converting solar energy into chemical form through photosynthesis processes. Additionally, these new compositions have improved properties such as increased surface area per unit weight compared to existing products made up entirely of conventional ingredients. Overall, they provide an effective way to make highly active and stable photoactive agents on Earth' s scale.

Problems solved by technology

This patents discuss various ways to improve the effectiveness of chemical sterilization processes against harmful germs and other contaminating substances found worldwide. One approach involves developing novel systems called titanium dioxynaphosphorus based photooxysorbates (TPSO). These TPOs absorb sunlight over longer periods without relying heavily upon expensive noble metal precursors like silver chlorides. By combining these different components into one molecular crystal framework, they may provide improved stability and durability when exposed to high levels of UVA rays during natural illumination. Additionally, it suggests exploring how certain types of metals could modify the electron transfer characteristics within the pyroelectric layer itself, resulting in enhanced photosensitivity at short wavelength regions where LED lights work most effectively.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] (1) Preparation of bismuth oxychloride with flake structure: Weigh 0.5g of bismuth nitrate pentahydrate and 0.077g of potassium chloride and mix them in a beaker filled with deionized water, then stir the mixture at room temperature for 30min, and finally transfer to In a 25ml airtight autoclave containing polytetrafluoroethylene lining, the filling volume of the autoclave is 80%, and the autoclave is placed in a 160°C oven to react for 12 hours. After cooling to room temperature, the collected products are respectively Ultrasonic cleaning 3 times with deionized water and ethanol, and then drying to obtain bismuth oxychloride samples;

[0016] (2) Preparation of bismuth iodide oxide: Weigh 0.5g of bismuth nitrate pentahydrate and 0.171g of potassium iodide and mix in a beaker filled with deionized water, stir the mixture at room temperature for 30min, seal the beaker with a film, and place at 80°C React in a water bath for 2 hours, after cooling to room temperature, was...

Embodiment 2

[0019] (1) Preparation of bismuth oxychloride with flake structure: Weigh 0.5g of bismuth nitrate pentahydrate and 0.077g of potassium chloride and mix them in a beaker filled with deionized water, then stir the mixture at room temperature for 30min, and finally transfer to In a 25ml airtight autoclave containing polytetrafluoroethylene lining, the filling volume of the autoclave is 80%, and the autoclave is placed in a 160°C oven to react for 12 hours. After cooling to room temperature, the collected products are respectively Ultrasonic cleaning 3 times with deionized water and ethanol, and then drying to obtain bismuth oxychloride samples;

[0020] (2) Preparation of bismuth iodide oxide: Weigh 0.5g of bismuth nitrate pentahydrate and 0.171g of potassium iodide and mix in a beaker filled with deionized water, stir the mixture at room temperature for 30min, seal the beaker with a film, and place at 80°C React in a water bath for 2 hours, after cooling to room temperature, was...

Embodiment 3

[0023] (1) Preparation of bismuth oxychloride with flake structure: Weigh 0.5g of bismuth nitrate pentahydrate and 0.077g of potassium chloride and mix them in a beaker filled with deionized water, then stir the mixture at room temperature for 30min, and finally transfer to In a 25ml airtight autoclave containing polytetrafluoroethylene lining, the filling volume of the autoclave is 80%, and the autoclave is placed in a 160°C oven to react for 12 hours. After cooling to room temperature, the collected products are respectively Ultrasonic cleaning 3 times with deionized water and ethanol, and then drying to obtain bismuth oxychloride samples;

[0024] (2) Preparation of bismuth iodide oxide: Weigh 0.5g of bismuth nitrate pentahydrate and 0.171g of potassium iodide and mix in a beaker filled with deionized water, stir the mixture at room temperature for 30min, seal the beaker with a film, and place at 80°C React in a water bath for 2 hours, after cooling to room temperature, was...

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PUM

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Abstract

The invention belongs to the technical field of a photocatalytic material and relates to a visible-light photocatalytic material and a preparation method thereof. The visible-light photocatalytic material is prepared from bismuth oxychloride and bismuth oxyiodide; and the mol ratio of the bismuth oxychloride is 15-30%. In a synthesis process, the sheet-shaped bismuth oxychloride and bismuth oxyiodide are synthesized by respectively adopting a hydrothermal method and a water bath method, then sufficiently mixing in ethanol according to a ratio, centrifuging, drying, grinding, calcining, cooling and grinding to obtain bismuth oxychloride/bismuth oxyiodide visible-light heterogeneous photocatalytic materials with the different ratios. The method is low in cost and equipment is simple and easy to control. The prepared bismuth oxychloride/bismuth oxyiodide visible-light heterogeneous photocatalytic material has high photon-generated carrier efficiency, greatly improves the light utilization rate and the photocatalytic performance of the material, and represents the good catalytic performance in a process of degrading methyl orange MO.

Description

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Claims

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Application Information

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Owner SHANDONG UNIV
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