Preparation method and application for ternary composite photocatalyst

A ternary composite and photocatalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve problems such as high cost and unsuitable for large-scale applications , to achieve short reaction time, excellent photocatalytic activity, and easy mass production

Inactive Publication Date: 2016-06-22
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The traditional method of constructing a near-infrared light-responsive photocatalyst system is to use the surface plasmon resonance effect of noble metals (mostly Au), but the cost is high and it is not suitable for large-scale applications.

Method used

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  • Preparation method and application for ternary composite photocatalyst
  • Preparation method and application for ternary composite photocatalyst
  • Preparation method and application for ternary composite photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Preparation of Silver Oxide Nanoparticles with Octahedral Morphology

[0041] 1. Take 20ml of 1mol / L ammonium dihydrogen phosphate solution and add it dropwise to 10ml of 0.4mol / L silver nitrate solution to obtain solution A.

[0042] 2. Subsequently, the above solution A was adjusted to a pH value of 11 with 1 mol / L sodium hydroxide, and a black suspension B was gradually obtained.

[0043] 3. Fully stir the above black suspension B for 10 minutes, let stand, and centrifuge for 10 minutes to obtain a black solid. Alternately washed three times with deionized water and ethanol, and vacuum dried at 60 °C for 24 hours to obtain the sample Ag 2 O.

Embodiment 2

[0045] 0.5wt% CQDs / Ag 2 Preparation of O

[0046] 1. Preparation of carbon quantum dots

[0047] 1. Dissolve 0.05mol of glucose in 50ml of water to form a uniform and stable aqueous solution A.

[0048] 2. Take 50ml of 1mol / L sodium hydroxide solution and slowly add it to aqueous solution A to obtain solution B, then place the above solution B in an ultrasonic cleaner for 3 hours to obtain solution C containing carbon quantum dots, and then dialyze to obtain the diameter A carbon quantum solution with a particle size of 5-10nm.

[0049] 3. The above carbon quantum dot solution was freeze-dried for 24 hours to obtain carbon quantum dot powder.

[0050] 2. Preparation of carbon quantum dots modified octahedral silver oxide

[0051] 1. Dissolve 2.3mg of carbon quantum dots in 20ml of 1mol / L ammonium dihydrogen phosphate solution to form solution D, add solution D dropwise to 10ml of 0.4mol / L silver nitrate solution, and stir thoroughly for 10 minutes to obtain solution E . ...

Embodiment 3

[0054] Ag / Ag with photodeposition time of 2h 2 Preparation of O

[0055] 1. Preparation of octahedral silver oxide

[0056] 1. Take 20ml of 1mol / L ammonium dihydrogen phosphate solution and add it dropwise to 10ml of 0.4mol / L silver nitrate solution to obtain solution A.

[0057] 2. Then adjust the pH value of the above solution A to 11 with 1mol / L sodium hydroxide, and gradually obtain a black suspension B.

[0058] 2. Put the black suspension B under a 250W UV lamp for 2 hours under vigorous stirring, then stand still and centrifuge for 10 minutes to obtain a black solid, which is washed alternately with deionized water and ethanol three times, and dried in vacuum at 60°C for 24 hours. Finally get Ag / Ag 2 O samples.

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Abstract

The invention belongs to the technical field of nano-material synthesis, and particularly relates to a preparation method and the application of a ternary composite photocatalyst. The preparation method comprises the following steps: first, synthesizing CQDs (Carbon Quantum Dots) with a remarkable up-conversion fluorescence effect by utilizing a simple one-step alkali auxiliary ultrasonic processing method; then, generating silver oxide (Ag2O) with an octahedral structure in CQDs solution by a wet-chemical method to obtain a CQDs/Ag2O compound with a CQDs coating layer; finally, loading silver (Ag) nano-particles on the surface of the CQDs/Ag2O by using chemical deposition and photo-deposition methods. The ternary composite photocatalyst can be used for degrading organic pollutants, such as rhodamine B, under full spectrum.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial synthesis. Firstly, carbon quantum dots (CQDs) with significant upconversion fluorescence effect are synthesized by a simple one-step alkali-assisted ultrasonic treatment method, and then the oxidation of octahedral structure is generated in the CQDs solution by a wet chemical method. Silver (Ag 2 O), to obtain CQDs / Ag with CQDs coating layer 2 O complexes were finally deposited on CQDs / Ag using chemical deposition and photodeposition methods 2 Silver (Ag) nanoparticles loaded on the surface of O can be used to degrade organic pollutants such as rhodamine B under the full spectrum. Background technique [0002] Since the 20th century, while enjoying the comfort and convenience brought by the rapid development of science and technology, human beings have also suffered from the deteriorating living environment caused by blindness and short-sightedness. In today's deteriorating ecological env...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/50C02F1/30
CPCY02W10/37B01J23/50B01J35/004C02F1/30C02F2101/308C02F2305/10
Inventor 刘春波陈继斌黄凯车慧楠陈天俊李春发
Owner JIANGSU UNIV
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