Nitrogen-doped carbon quantum dot/metal organic framework material MOF-5 photocatalyst as well as preparation method and application thereof

Abstract

The invention discloses a nitrogen-doped carbon quantum dot / metal organic framework material MOF-5 photocatalyst as well as a preparation method and application thereof, and relates to the field of photocatalyst preparation. A natural resource coconut shell is used as a raw material, nitrogen-doped carbon quantum dots are prepared by a hydrothermal method, and the nitrogen-doped carbon quantum dots are introduced when a metal organic framework material MOF-5 is prepared by an in-situ synthesis method. During photocatalysis, the nitrogen-doped carbon quantum dot / metal organic framework material MOF-5 photocatalyst improves the conductivity, the stability and the photocatalytic performance of the metal organic framework material MOF-5 by utilizing the high charge transfer capability and the molecular oxygen activation capability of the nitrogen-doped carbon quantum dots (N-CQD). The method is short in technological process, raw materials are low in price and easy to obtain, the method is a very ideal preparation method of the photocatalyst nitrogen-doped carbon quantum dot / metal organic framework material MOF-5, and the nitrogen-doped carbon quantum dot / metal organic framework material MOF-5 photocatalyst prepared through the method has very good photocatalytic performance on hexavalent chromium and can be widely applied to treatment of chromium-containing wastewater.

Description

technical field

[0001] The invention belongs to the field of photocatalyst preparation, in particular to a nitrogen-doped carbon quantum dot / metal organic framework material (MOF-5) photocatalyst and a preparation method and application thereof. Background technique

[0002] Tap water used in daily life often contains a small amount of chromium, which mainly comes from industrial wastewater such as metallurgy, refractory materials, chemicals, electroplating, and tanning. Chromium appears in two valence forms of hexavalent and trivalent in water. The toxicity of hexavalent chromium is relatively strong, about 100 times that of trivalent chromium. It mainly exists in the form of chromate, which is harmful to most organisms. Toxic, classified as a carcinogen and mutagen.

[0003] The reduction of Cr(VI) in water by semiconductor photocatalysts has obvious advantages, such as low cost, environmental protection, high efficiency, flexibility, feasibility, and direct use of unlimi...

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