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Preparation method of bivalent nickel ion doped and modified titanium dioxide (nickel-titanium dioxide) visible-light-induced photocatalyst

An ion doping, titanium dioxide technology, applied in the preparation and application of nanomaterials, can solve the problems of low utilization rate of visible light, large forbidden band width, hindering semiconductor applications, etc., and achieves simple and easy operation of equipment, good dispersion, and low cost. Effect

Inactive Publication Date: 2020-01-17
JILIN NORMAL UNIV
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Problems solved by technology

But due to TiO 2 The semiconductor has a large band gap, and its utilization rate of visible light is very low. In addition, the high-speed recombination of photogenerated electron-hole pairs also hinders TiO 2 Applications of semiconductors as highly efficient photocatalysts

Method used

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  • Preparation method of bivalent nickel ion doped and modified titanium dioxide (nickel-titanium dioxide) visible-light-induced photocatalyst
  • Preparation method of bivalent nickel ion doped and modified titanium dioxide (nickel-titanium dioxide) visible-light-induced photocatalyst
  • Preparation method of bivalent nickel ion doped and modified titanium dioxide (nickel-titanium dioxide) visible-light-induced photocatalyst

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Embodiment Construction

[0018] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0019] A kind of Ni 2+ Doped modified TiO 2 (Ni-TiO 2 ) The preparation method of visible light catalyst, comprises the following steps:

[0020] (1) Weigh 1.6g of poly(ethylene glycol)-block-poly(propylene glycol)-block-poly(ethylene glycol) (referred to as F127, M.W.100000) solid, and add F127 to 30mL of absolute ethanol solvent, Stir at 60°C for 30min at a speed of 400rpm to fully dissolve F127 to form solution A;

[0021] (2), add 0.2g nickel acetate tetrahydrate (Ni(Ac) 2 4H 2 O) solid, stir 5min at room temperature, the rotating speed is 200rpm, make Ni(Ac) 2 4H 2 O is completely dissolved to form solution B;

[0022] (3), solution B was added dropwise to solution A at a speed of 60 d / min to form solution C, and 3.5 mL of tetrabutyl titanate (Ti(OC) was added to solution C 4 h 9 ) 4 ), stirred at 60° C. for 30 minutes, and the...

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Abstract

The invention discloses a preparation method of a Ni<2+> doped and modified TiO2 (Ni-TiO2) visible-light-induced photocatalyst, belonging to the technical field of preparation and application of nanomaterials. According to the method, Ni<2+> is doped into a TiO2 semiconductor, so surface oxygen defects can be artificially introduced. The band gap of the TiO2 semiconductor is narrowed due to dopingof Ni<2+> and introduction of the surface oxygen defects, so the light absorption range of Ni-TiO2 is expanded to a visible light region, and thus, the utilization of visible light by the TiO2 semiconductor is improved. The photocatalytic nitrogen fixation performance of the photocatalyst is evaluated based on the yield of NH3 in unit time. The method is simple and environment-friendly and has high catalytic efficiency; and the photocatalyst has potential application value in the field of visible light catalytic nitrogen fixation.

Description

technical field [0001] The invention belongs to the field of preparation and application of nanomaterials, in particular to a divalent nickel ion (Ni 2+ ) doped modified titanium dioxide (nickel-titanium dioxide)﹛TiO 2 (Ni-TiO 2 )﹜The preparation method of visible light catalyst. Background technique [0002] Ammonia is one of the starting components in the synthesis of amino acids, nucleotides and other biological compounds in all living organisms, and is an indispensable chemical in biosynthesis as well as in agricultural fertilizers. The main method for producing ammonia in industry is the Haber-Bosch method, but this process has extremely high requirements on equipment, and it needs to be carried out under high temperature, high pressure and catalyst conditions, and the catalyst recycling efficiency is low. This method leads to huge energy consumption . Therefore, it is imperative to explore an energy-saving, economical and environmentally friendly artificial nitroge...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755B01J35/08C01C1/02
CPCB01J23/755B01J23/002B01J35/004B01J35/08C01C1/02Y02P20/52
Inventor 翟宏菊孙德武李佳昕赵钊关壬铨宋沐遥李铭新李晓慧
Owner JILIN NORMAL UNIV
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