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a kind of nimoo 4 Z-based heterojunction photocatalyst and its preparation and application

A photocatalyst and heterojunction technology, applied in catalyst activation/preparation, physical/chemical process catalyst, metal/metal oxide/metal hydroxide catalyst, etc., can solve the problem of limited catalyst application and serious photogenerated carrier recombination and other problems, to achieve excellent photocatalytic hydrogen evolution performance, biomass reforming hydrogen production performance, high atomic utilization rate, and the effect of increasing specific surface area

Active Publication Date: 2022-03-25
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the serious recombination of photogenerated carriers directly limits the application of this catalyst.

Method used

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  • a kind of nimoo <sub>4</sub> Z-based heterojunction photocatalyst and its preparation and application
  • a kind of nimoo <sub>4</sub> Z-based heterojunction photocatalyst and its preparation and application
  • a kind of nimoo <sub>4</sub> Z-based heterojunction photocatalyst and its preparation and application

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Experimental program
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Effect test

preparation example Construction

[0045] The preparation process of the present invention is as follows:

[0046] Synthesis of NiMoO by hydrothermal process and calcination process 4 , the NiMoO 4 (8.46-169.2g) was added to 40ml of ethylene glycol solvent and sonicated for 10min, then the zinc source, indium chloride tetrahydrate, and thioacetamide were dissolved in the above ethylene glycol solution at a mass ratio of 272:1172:600 , stirred evenly for 20 minutes and transferred to a high-pressure reactor, kept at 80-120°C for 2 hours, cooled naturally to room temperature, and the obtained product was centrifugally washed with absolute ethanol, and vacuum-dried to obtain different Mo-doped Ni-loaded ZIS-wrapped NM system photocatalysts. named x NM@ZIS-y (x: NiMoO 4 Added mass percent; y: reaction temperature).

[0047] Test Conditions:

[0048] Using triethanolamine as a sacrificial agent: 10mg catalyst + 100mL triethanolamine aqueous solution (10ml triethanolamine + 90ml water), under a 300W xenon lamp wi...

Embodiment 1

[0053] Dissolve 0.25g of ammonium molybdate tetrahydrate in 30mL of deionized aqueous solution, stir evenly, add 0.2 g of nickel nitrate tetrahydrate, ultrasonicate for 10 minutes, then transfer to a high-pressure reactor, keep warm at 180°C for 10 hours, and cool naturally to room temperature. Washed with deionized water and absolute ethanol three times respectively, and vacuum dried to obtain NiMoO 4 hydrate, and finally raise the temperature from room temperature to 450°C at a heating rate of 5°C / min and hold it for 2 hours to obtain NiMoO 4 . 8.46mg NiMoO 4 Disperse in 40mL of ethylene glycol and sonicate for 10min; dissolve 272mg of anhydrous zinc chloride, 1172mg of indium chloride tetrahydrate, and 600mg of thioacetamide in the above ethylene glycol solution, stir evenly for 30min and transfer to a high-pressure reactor , kept at 120°C for 2 h, cooled naturally to room temperature, and the obtained product was centrifuged and washed three times with absolute ethanol, ...

Embodiment 2

[0055] Dissolve 0.25g of ammonium molybdate tetrahydrate in 30mL of deionized aqueous solution, stir evenly, add 0.2 g of nickel nitrate tetrahydrate, ultrasonicate for 10 minutes, then transfer to a high-pressure reactor, keep warm at 180°C for 10 hours, and cool naturally to room temperature. Washed with deionized water and absolute ethanol three times respectively, and vacuum dried to obtain NiMoO 4 hydrate, and finally raise the temperature from room temperature to 450°C at a heating rate of 5°C / min and hold it for 2 hours to obtain NiMoO 4 . 42.3mg NiMoO 4 Disperse in 40mL of ethylene glycol and sonicate for 10min; dissolve 272mg of anhydrous zinc chloride, 1172mg of indium chloride tetrahydrate, and 600mg of thioacetamide in the above ethylene glycol solution, stir evenly for 30min and transfer to a high-pressure reactor , kept at 120°C for 2 h, cooled naturally to room temperature, and the obtained product was centrifuged and washed three times with absolute ethanol, ...

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Abstract

The invention discloses a NiMoO 4 Z-based heterojunction photocatalyst and its preparation and application. The present invention uses a one-step solvothermal method to construct Mo-doped Ni-loaded and Z-type heterojunction photocatalysts, and rationally designs Mo-doped Ni-loaded ZnIn 2 S 4 Wrapped NiMoO 4 Z-type heterojunction photocatalyst. The present invention does not need to use a template agent and a surfactant, and avoids the cumbersome step-by-step construction of co-catalyst modification (noble metal) and heterojunction. The photocatalyst obtained by the invention not only widens the range of light absorption and improves the utilization efficiency of sunlight, but also greatly improves the energy band structure of the heterojunction and the separation efficiency of carriers, and exhibits excellent photocatalytic performance.

Description

technical field [0001] The invention belongs to the field of photocatalysts, in particular to a Mo-doped Ni-loaded ZnIn 2 S 4 Wrap NiMoO 4 Z-type heterojunction photocatalyst and its preparation and application. Background technique [0002] At present, the development of human society is mainly based on non-viable traditional energy sources (coal, oil and natural gas, etc.). As the massive consumption of traditional energy causes serious environmental and energy problems, people are forced to explore cleaner energy. Among many energy sources, such as solar energy, wind energy, nuclear energy and hydrogen energy, hydrogen energy has attracted people's attention due to its high energy density, zero emission and sustainability. At present, there are many means of hydrogen production, such as steam methane reforming, water gas method, electrolysis of water and photolysis of water. Among many approaches, the sustainable production of hydrogen by photo-splitting of water ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/04B01J23/883B01J37/10B01J37/08C01B3/04C01B3/22
CPCB01J27/04B01J23/883B01J23/002B01J35/004B01J35/0013B01J37/10B01J37/088C01B3/042C01B3/22C01B2203/0227C01B2203/1058C01B2203/1082Y02E60/36
Inventor 楼宏铭苏行周兰邱学青杨东杰庞煜霞
Owner SOUTH CHINA UNIV OF TECH
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