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Water-soluble silver-indium-sulfur quantum dot photocatalyst and room-temperature preparation method thereof

A silver indium sulfur quantum and catalyst technology, which is applied in chemical instruments and methods, physical/chemical process catalysts, water treatment parameter control, etc., can solve problems such as long reaction time, high reaction temperature, and small reaction vessel capacity, and achieve operational Simple, simple preparation process, and the effect of reducing preparation cost

Pending Publication Date: 2022-02-08
HEFEI UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problems of small reaction vessel capacity, high reaction temperature and long reaction time in the preparation process of the existing silver indium sulfur quantum dot photocatalyst, the present invention provides a water-soluble silver indium sulfur quantum dot photocatalyst and a preparation method at room temperature

Method used

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  • Water-soluble silver-indium-sulfur quantum dot photocatalyst and room-temperature preparation method thereof
  • Water-soluble silver-indium-sulfur quantum dot photocatalyst and room-temperature preparation method thereof
  • Water-soluble silver-indium-sulfur quantum dot photocatalyst and room-temperature preparation method thereof

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Effect test

Embodiment 1

[0028] A kind of preparation operation steps of water-soluble silver indium sulfur quantum dot photocatalyst is as follows:

[0029] (1) Take five beakers, add 15 ml of deionized water, 17 mg of 3-mercaptopropionic acid, 6.0 mg of indium nitrate, and 3.4 mg of silver nitrate into each beaker according to the formula, mix well, add sodium hydroxide until the solution is clear, Five identical precursor solutions were obtained. The molar ratio of silver ions to indium ions in the precursor solution was 1:1; the amount of ligand 3-mercaptopropionic acid added was four times the total molar amount of indium nitrate and silver nitrate.

[0030] (2) Add 48 mg of sodium sulfide nonahydrate to the five precursor solutions respectively, the molar ratio of the cationic precursor to sodium sulfide nonahydrate in the five solutions is 1:5, and then use 3-mercaptopropionic acid to dissolve the five The pH value of the precursor solution was adjusted to 3.0, 3.5, 4.0, 4.5, 5.0 respectively, ...

Embodiment 2

[0033] A kind of preparation operation steps of water-soluble silver indium sulfur quantum dot photocatalyst is as follows:

[0034] (1) Take five beakers marked as No. 1-5, add 15 ml of deionized water respectively, and then add 17 mg of 3-mercaptopropionic acid, 9.60 mg of indium nitrate, and 1.36 mg of silver nitrate to No. 1 beaker according to the formula; Add 17 mg of 3-mercaptopropionic acid, 8.10 mg of indium nitrate, and 2.21 mg of silver nitrate to No. 2 beaker; add 17 mg of 3-mercaptopropionic acid, 6.00 mg of indium nitrate, and 3.40 mg of silver nitrate to No. 3 beaker; Add 17 mg of 3-mercaptopropionic acid, 3.90 mg of indium nitrate, and 4.59 mg of silver nitrate; add 17 mg of 3-mercaptopropionic acid, 2.40 mg of indium nitrate, and 5.44 mg of silver nitrate to No. 5 beakers; add hydrogen to each of the five beakers Sodium oxide was oxidized until the solution was clear to obtain five precursor solutions in which the molar ratios of silver cation precursor to ind...

Embodiment 3

[0038] A kind of preparation operation steps of water-soluble silver indium sulfur quantum dot photocatalyst is as follows:

[0039] (1) Take five beakers, add 15 ml of deionized water, 17 mg of 3-mercaptopropionic acid, 6.0 mg of indium nitrate, and 3.4 mg of silver nitrate to each beaker according to the formula, mix well, add sodium hydroxide until the solution is clear , five identical precursor solutions were obtained, and the molar ratio of the silver cation precursor to the indium cation precursor in the precursor solution was 1:1.

[0040] (2) Add 9.6 mg, 19.2 mg, 28.8 mg, 38.4 mg, and 48 mg of sodium sulfide nonahydrate to the five precursor solutions respectively, and the molar ratios of the cationic precursor to sodium sulfide nonahydrate in the five solutions are 1 :1, 1:2, 1:3, 1:4, 1:5. Then use 3-mercaptopropionic acid to adjust the pH value of five parts of the precursor solution to 3.5, and react for 20 minutes under stirring conditions to obtain five parts o...

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Abstract

The invention relates to a water-soluble silver-indium-sulfur quantum dot photocatalyst and a preparation method thereof, and belongs to the technical field of water-soluble quantum dot photocatalysts. The water-soluble silver-indium-sulfur quantum dot photocatalyst is prepared from cation precursors and an anion precursor in water, wherein the cation precursors are a silver cation precursor and an indium cation precursor, and the anion precursor is sodium sulfide nonahydrate. The water-soluble silver-indium-sulfur quantum dot photocatalyst is powdery microparticles with a size of 2-5 nanometers, has the characteristics of semiconductor quantum dots and emits visible light under ultraviolet irradiation. The photocatalyst can realize photocatalytic degradation of methyl orange under an illumination condition. The preparation method comprises the following operation steps of: mixing a silver cation precursor, an indium cation precursor, a sulfhydryl compound and water, adding sodium hydroxide or potassium hydroxide, then adding sodium sulfide nonahydrate, adjusting the pH value with a weak acid solution, stirring and drying. When 0.85 mg of the photocatalyst is used for photocatalytic degradation of an aqueous solution containing 0.8 mg of methyl orange, the highest degradation efficiency within 1 minute can reach 98.2%.

Description

technical field [0001] The invention belongs to the technical field of water-soluble quantum dot photocatalysts, and in particular relates to a water-soluble silver indium sulfur quantum dot photocatalyst and a normal temperature preparation method. Background technique [0002] The problem of water pollution in today's society is becoming more and more serious, and the natural degradation rate of organic dyes such as methyl orange and methylene blue in sewage is very slow and bioaccumulative, which seriously threatens the health of human beings and future generations. As a new environmental protection technology developed in recent years, photocatalytic degradation uses sunlight to excite semiconductors to generate electrons and holes, and oxidizes organic pollutants into H on the surface of semiconductors. 2 O and CO 2 and other inorganic substances. Since the active substance generated during the reaction has a high redox potential second only to fluorine, it can degrad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/04B01J35/02C02F1/30C02F101/38B01J35/00
CPCB01J27/04C02F1/30C02F2305/10C02F2101/38C02F2209/06C02F2209/44B01J35/39B01J35/40
Inventor 李伸杰龚小玉陈艳艳李智强邵鸿宇
Owner HEFEI UNIV OF TECH
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