A kind of preparation method of niobium nitride/cadmium sulfide composite nanoparticle photocatalyst

A composite nanoparticle and photocatalyst technology, which is applied in physical/chemical process catalysts, chemical instruments and methods, hydrogen/synthesis gas production, etc., can solve the problems of low hydrogen production efficiency, poor stability and serious photocorrosion of noble metal cocatalysts , to achieve the effect of high-efficiency visible light photocatalytic hydrogen production activity, uniform dispersion, and good photocorrosion resistance.

Active Publication Date: 2018-06-29
HEILONGJIANG UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of severe photocorrosion, poor stability, need for noble metal co-catalysts and low hydrogen production efficiency in the cadmium sulfide photocatalyst prepared in the prior art, and to provide a niobium nitride / cadmium sulfide composite nanoparticle photocatalyst Catalyst preparation method

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  • A kind of preparation method of niobium nitride/cadmium sulfide composite nanoparticle photocatalyst
  • A kind of preparation method of niobium nitride/cadmium sulfide composite nanoparticle photocatalyst
  • A kind of preparation method of niobium nitride/cadmium sulfide composite nanoparticle photocatalyst

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specific Embodiment approach 1

[0038] Embodiment 1: This embodiment is a preparation method of niobium nitride / cadmium sulfide composite nanoparticle photocatalyst, which is completed according to the following steps:

[0039] 1. Preparation of niobium nitride precursor: at a temperature of 25°C to 35°C, mix niobium pentoxide and a solid base evenly and place it in a muffle furnace at a temperature of 300°C to 600°C for 2h to 6h , to obtain a roasted product; add water at a temperature of 100°C to the roasted product, and then filter to remove the filter residue to obtain a filtrate; add concentrated acid dropwise to the filtrate at a rate of 10 mL / min to 15 mL / min to obtain a precipitate A ; Wash the precipitated substance A for 3 to 5 times with distilled water, and then dry it in an electric blast drying oven at a temperature of 50°C to 100°C for 6h to 12h to obtain a niobium nitride precursor;

[0040] The molar ratio of niobium pentoxide and solid base described in step 1 is (1~5):10;

[0041]The temp...

specific Embodiment approach 2

[0060] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the solid base described in step 1 is one of sodium hydroxide, potassium hydroxide, sodium carbonate and potassium carbonate or a mixture of several of them. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0061] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the molar ratio of niobium pentoxide to solid base in step 1 is 1:10. Other steps are the same as those in Embodiment 1 or 2.

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Abstract

The invention relates to a photocatalyst preparation method, in particular to a niobium nitride / cadmium sulfide composite nanoparticle photocatalyst preparation method and aims to solve problems of serious photocorrosion, poor stability, demand of precious metal promoters and low hydrogen production efficiency of cadmium sulfide photocatalysts prepared in the prior art. The method includes: firstly, preparing a niobium nitride precursor; secondly, preparing niobium nitride nanoparticles; thirdly, preparing a niobium nitride and cadmium salt solution; fourthly, adding a sulfur source into the niobium nitride and cadmium salt solution; fifthly, centrifugally separating and washing, and drying to obtain a niobium nitride / cadmium sulfide composite nanoparticle photocatalyst. After the niobium nitride / cadmium sulfide composite nanoparticle photocatalyst is illuminated for 4h, hydrogen yield reaches 409.6micromole per hour. By the preparation method, the niobium nitride / cadmium sulfide composite nanoparticle photocatalyst can be obtained.

Description

technical field [0001] The invention relates to a preparation method of a photocatalyst. Background technique [0002] One of the important ways of climate governance is to develop and utilize efficient and diverse clean energy systems and technologies. Water is abundant and is a green source of protons; it can not only be directly decomposed to produce clean and renewable hydrogen energy with high-quality specific energy density. Therefore, water splitting to generate hydrogen energy is the basis for building a new clean energy system and solving environmental problems. [0003] Photocatalytic technology is based on solar energy resources in the natural environment. It uses the semiconductor photoelectric effect to generate photogenerated electrons and holes when it is excited by light. The holes are used to oxidize water to generate oxygen and release protons, and the electrons are used to reduce protons to generate hydrogen. This technology for producing green new energ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24C01B3/04
CPCB01J27/04B01J27/24B01J35/004B01J35/1014B01J35/1019B01J35/1023C01B3/042C01B2203/0277C01B2203/1041Y02E60/36
Inventor 曲阳付宏刚井立强李娜李志君
Owner HEILONGJIANG UNIV
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