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Visible-light-driven photocatalyst for degrading dye in wastewater, and preparation and application thereof

A catalyst and visible light technology, applied in the field of photocatalysis, can solve the problems that the active components cannot be fully and efficiently utilized, there is no rigid carrier with a large specific surface, and the catalyst is difficult to separate and recycle, etc., and achieves improved reaction stability, low cost, and ease of use. The effect of regeneration

Active Publication Date: 2017-05-31
BINZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology describes different ways that certain elements (Ti or Fe atom) from titanium oxide react chemically when exposed to sunlight during photosynthesis reactions. These techniques enhance their effectiveness by making them more effective against harmful organic substances such as pesticides and other chemical pollutants found commonly throughout waterways worldwide. Additionally, this new method allows for easier recovery and reuse of these materials without losing its ability to perform any function they were previously designed for.

Problems solved by technology

This patented technical problem addressed in this patents relates to improving the efficiency at reducing pollutants from various sources during processing and cleanup processes involving printed/dyttage waters. Current technologies involve expensive chemical reagents like chloro acid bleach, ozone generators, etc., while newer techniques based on nanoporous materials offer better performance compared to traditional approaches.

Method used

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  • Visible-light-driven photocatalyst for degrading dye in wastewater, and preparation and application thereof
  • Visible-light-driven photocatalyst for degrading dye in wastewater, and preparation and application thereof
  • Visible-light-driven photocatalyst for degrading dye in wastewater, and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] At room temperature, dissolve 3.1 g of cetyltrimethylammonium bromide in a mixture of 250 ml of ethanol and deionized water (the volume ratio of absolute ethanol and deionized water is 1:4) to obtain solution A After 30 minutes, in solution A, add dropwise 50 ml25% ammoniacal liquor successively, 13 milliliters of tetraethyl orthosilicate and 0.2 milliliters of titanium isopropoxides, continue stirring at room temperature after 4 hours, obtain solid substance B by suction filtration, then solid Substance B was dried at 110°C for 5 hours, calcined at 500°C for 6 hours, and cooled to obtain mesoporous MCM-48 (Ti-MCM-48) solid particles with Ti atoms in the skeleton.

[0037] In 15 ml deionized water, add 0.2 g dicyandiamide, 0.02 g CuCl 2 ·H 2 O and 1 g of the Ti-MCM-48 obtained above were stirred at 100 °C for 2 hours, and the blue solid powder C was obtained by ordinary distillation; then the obtained blue solid powder C was dried at 110 °C for 5 h, and then heated at ...

Embodiment 2

[0044] At room temperature, dissolve 3.1 g of cetyltrimethylammonium bromide in a mixture of 250 ml of ethanol and deionized water (the volume ratio of absolute ethanol and deionized water is 1:4) to obtain solution A After 30 minutes, in solution A, add dropwise 50 ml25% ammoniacal liquor successively, 13 milliliters of ethyl orthosilicate and 0.032 milliliters of titanium isopropoxides, continue to stir at room temperature after 4 hours, get solid substance B by suction filtration, then solid Substance B was dried at 110°C for 5 hours, calcined at 500°C for 6 hours, and cooled to obtain mesoporous MCM-48 (Ti-MCM-48) solid particles with Ti atoms in the skeleton.

[0045] In 15 ml deionized water, add 0.2 g dicyandiamide, 0.02 g CuCl 2 ·H 2 O and 1 g of the Ti-MCM-48 obtained above were stirred at 100 °C for 2 hours, and the blue solid powder C was obtained through ordinary distillation. Then the obtained blue solid powder C was dried at 110 °C for 5 h, calcined at 550 °C f...

Embodiment 3

[0048] At room temperature, dissolve 3.1 g of cetyltrimethylammonium bromide in a mixture of 250 ml of ethanol and deionized water (the volume ratio of absolute ethanol and deionized water is 1:4) to obtain solution A After 30 minutes, in solution A, add dropwise 50 ml25% ammoniacal liquor successively, 13 milliliters of ethyl orthosilicate and 0.32 milliliters of titanium isopropoxides, continue to stir at room temperature after 4 hours, get solid substance B by suction filtration, then solid Substance B was dried at 110°C for 5 hours, calcined at 500°C for 6 hours, and cooled to obtain mesoporous MCM-48 (Ti-MCM-48) solid particles with Ti atoms in the skeleton.

[0049] In 15 ml deionized water, add 0.2 g dicyandiamide, 0.02 g CuCl 2 ·H 2 O and 1 g of the Ti-MCM-48 obtained above were stirred at 100 °C for 2 hours, and the blue solid powder C was obtained by ordinary distillation; then the obtained blue solid powder C was dried at 110 °C for 5 h, and then dried at 550 °C un...

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Abstract

The invention relates to the field of photocatalysis, and particularly relates to a visible-light-driven photocatalyst for degrading dye in wastewater, and preparation and application thereof. The visible-light-driven photocatalyst for degrading dye in wastewater is characterized in that mesoporous silicon dioxide of which the framework contains Ti atoms is used as a carrier, the mesoporous silicon dioxide carrier carries graphitic carbon nitride, and bivalent Cu ions are doped on the graphitic carbon nitride, wherein the graphitic carbon nitride with the doped cupric ions serves as a main catalyst, and the element Ti serves as a cocatalyst. The Ti atoms contained in the framework of the mesoporous silicon dioxide directly react with H2O2 in a photo-Fenton-like system to produce hydroxyl free radicals, thereby obviously improving the photo-Fenton-like reaction activity. The photocatalyst provided by the invention catalyzes degradation of methyl orange and/or rhodamine B in wastewater, and degradation can be performed at room temperature under the irradiation of visible light, thereby enabling the photocatalyst to have the advantages of mild reaction conditions, low cost and easy implementation; and the photocatalyst can be easily regenerated, and still has excellent photocatalytic performance after being regenerated many times.

Description

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Claims

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Application Information

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Owner BINZHOU UNIV
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