CD (carbon dot)/CdS quantum dot/C3N4 catalyst and preparation method thereof

A technology of carbon quantum dots and cadmium sulfide, which is applied in the field of carbon dots/cadmium sulfide quantum dots/carbon nitride catalysts and their preparation, can solve problems such as pollution, and achieve the effects of good experiment repeatability, improved utilization, and inhibition of recombination

Active Publication Date: 2018-01-19
NANCHANG HANGKONG UNIVERSITY
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Problems solved by technology

[0004] The purpose of the present invention is to provide a carbon dot/cadmium sulfide quantum dot/carbon nitride catalyst and its preparation method, whi

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  • CD (carbon dot)/CdS quantum dot/C3N4 catalyst and preparation method thereof
  • CD (carbon dot)/CdS quantum dot/C3N4 catalyst and preparation method thereof
  • CD (carbon dot)/CdS quantum dot/C3N4 catalyst and preparation method thereof

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Embodiment Construction

[0023] 1. Synthesis of catalyst; (1) Synthesis of graphene-like carbon nitride (GCN);

[0024] Weigh 6.5 g of urea and add it to a 15 ml porcelain crucible, compact it slightly with a medicine spoon, and cover the crucible. The above-mentioned porcelain crucible was placed in a muffle furnace at 550°C to keep the temperature constant for 2 hours, and the heating rate was 8°C / min. Put the calcined pale yellow product in a mortar and grind it into powder, namely GCN.

[0025] (2) Synthesis of 1.0% CdS / GCN; take 0.4166 g of GCN in 25 ml of dimethyl sulfoxide solvent, stir thoroughly for 5 minutes, and sonicate for 1 hour. Then 0.6663 g of cadmium acetate was added to the above liquid, stirred for 5 minutes, and ultrasonically treated for 5 minutes. After the solution was evenly stirred, it was placed in a hydrothermal tank and placed in a muffle furnace at 180° C. for 12 hours at a constant temperature. The solvothermal sample was centrifuged and washed several times, and then...

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Abstract

The invention discloses a CD (carbon dot)/CdS quantum dot/C3N4 catalyst and a preparation method thereof. The catalyst is prepared from CDs synthesized with an electrochemical method, CdS quantum dotssynthesized with a solvothermal method and g-C3N4 (graphene-like carbon nitride) synthesized with a calcination method. Under the simulated sunlight, the catalyst can efficiently and stably promote photocatalytic decomposition of water to produce hydrogen and also can catalyze and oxidize organic pollutants such as p-nitrophenol and the like. The catalyst has the advantages as follows: 1, the photoresponse range of a heterojunction catalyst is broadened through loading of the CDs, and absorption under visible light is improved; 2, the light utilization rate is increased by use of the upconversion effect of the CDs and the electron conduction capability; 3, the CdS quantum dots have moderate forbidden bandwidth, more photon-generated carriers are produced, and besides, combination of photo-generated electrons and holes is inhibited and the light utilization rate can be increased by use of the ultrahigh electron conduction capability of the CdS quantum dots.

Description

technical field [0001] The invention relates to a method for degrading organic pollutants or related fields, in particular to a carbon dot / cadmium sulfide quantum dot / carbon nitride catalyst and a preparation method thereof. Background technique [0002] With the rapid development of economy and society, problems such as environmental pollution and energy crisis are always threatening human health and sustainable development of society. With the increasingly serious energy and environmental problems, especially the environmental pollution brought by organic pollutants, it is difficult to completely eradicate them using traditional degradation methods. Therefore, developing a simple and effective method to degrade organic pollutants is an urgent problem for human society and can solve the energy crisis at the same time. Since A. Fujishima and F.Honda first discovered TiO in 1972 2 As an electrode material, since the catalytic decomposition of water under ultraviolet light t...

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Application Information

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IPC IPC(8): B01J27/24B01J37/08B01J37/10C09K11/88B82Y20/00B82Y30/00B82Y40/00C01B3/04C02F1/72C02F101/34C02F101/38
CPCY02E60/36
Inventor 王来春伍捷邹建平俞凡聂玉春唐晓霞程明军
Owner NANCHANG HANGKONG UNIVERSITY
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