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a mo doping moo 3 @znin 2 the s 4 Z system photocatalyst and its preparation method and application

A photocatalyst and system technology, which can be used in catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of hindered kinetic process of hydrogen production, etc., and achieve ultra-high photocatalytic water splitting performance for hydrogen production, The effect of reducing hydrogen production overpotential and inhibiting agglomeration

Active Publication Date: 2022-03-29
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

Patent CN 111617781 A discloses sulfur-indium-zinc-wrapped molybdenum hydride bronze Z system composite photocatalyst and its preparation method and application. The oxidation-reduction potential of the catalyst has been significantly improved, but its hydrogen production kinetics is also severely hindered

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  • a mo doping moo <sub>3</sub> @znin <sub>2</sub> the s <sub>4</sub> Z system photocatalyst and its preparation method and application
  • a mo doping moo <sub>3</sub> @znin <sub>2</sub> the s <sub>4</sub> Z system photocatalyst and its preparation method and application
  • a mo doping moo <sub>3</sub> @znin <sub>2</sub> the s <sub>4</sub> Z system photocatalyst and its preparation method and application

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preparation example Construction

[0042] The preparation process of the present invention is as follows:

[0043] Synthesis of MoO via a hydrothermal process 3 nanorods, the MoO 3 Add nanorods (10-60mg) into 20ml of ethylene glycol solvent and sonicate for 30min, then dissolve zinc source, indium chloride tetrahydrate, and thioacetamide in the above ethylene glycol solution at a mass ratio of 136mg: 586mg: 300mg , stirred evenly for 30 minutes and transferred to a high-pressure reactor, kept at 120°C for 2-12 hours, cooled to room temperature naturally, the obtained product was washed with absolute ethanol, and vacuum-dried to obtain MoO doped with different Mo 3 @ZnIn 2 S 4 The Z system photocatalyst is named x-M@ZIS-y (x: the amount of molybdenum oxide added; y: the reaction time).

Embodiment 1

[0049] Dissolve 1.4g of ammonium molybdate tetrahydrate in 40mL of acid solution (33mL of water + 7mL of concentrated nitric acid), stir evenly, transfer to a high-pressure reactor, keep warm at 180°C for 24h, and naturally cool to room temperature. and absolute ethanol were washed three times each, and MoO was obtained after vacuum drying. 3 Nano stave. 10mg MoO 3 Disperse the nanorods in 20mL of ethylene glycol and sonicate for 30min; dissolve anhydrous zinc chloride, indium chloride tetrahydrate, and thioacetamide in the above ethylene glycol solution at a mass ratio of 136mg: 586mg: 300mg, and stir well 30min and transferred to an autoclave, kept at 120°C for 2h, cooled to room temperature naturally, the product obtained was centrifuged and washed three times with absolute ethanol, and dried in vacuum to obtain Mo-doped MoO 3 @ZnIn 2 S 4 Z system photocatalyst named 10-M@ZIS-2.

Embodiment 2

[0051] Dissolve 1.4g of ammonium molybdate tetrahydrate in 40mL of acid solution (33mL of water + 7mL of concentrated nitric acid), stir evenly, transfer to a high-pressure reactor, keep warm at 180°C for 24h, and naturally cool to room temperature. and absolute ethanol were washed three times each, and MoO was obtained after vacuum drying. 3 Nano stave. 20mg MoO 3 Disperse the nanorods in 20mL of ethylene glycol and sonicate for 30min, dissolve anhydrous zinc chloride, indium chloride tetrahydrate, and thioacetamide in the above ethylene glycol solution at a mass ratio of 136mg: 586mg: 300mg, and stir evenly 30min and transferred to an autoclave, kept at 120°C for 2h, cooled to room temperature naturally, washed three times with absolute ethanol, and dried in vacuum to obtain Mo-doped MoO 3 @ZnIn 2 S 4 Z system photocatalyst named 20-M@ZIS-2.

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Abstract

The invention discloses a Mo-doped MoO 3 @ZnIn 2 S 4 Z system photocatalyst and its preparation method and application. The present invention uses a one-step solvothermal method to construct Mo-doped and Z-system photocatalysts, and rationally designs Mo-doped MoO 3 @ZnIn 2 S 4 Z system photocatalyst. This process does not use templates and surfactants, avoiding co-catalyst modification (noble metals) and step-by-step construction of heterojunctions. The catalyst not only broadens 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, showing excellent photocatalytic performance.

Description

technical field [0001] The invention belongs to the field of photocatalysts, in particular to a Mo-doped MoO 3 @ZnIn 2 S 4 Z system photocatalyst and its preparation method and application. Background technique [0002] The massive consumption of traditional energy (coal, oil and natural gas, etc.) has caused serious environmental pollution. With the rapid development of the world economy, people's dependence on energy is becoming more and more serious, so the issue of energy supply and demand has become the focus of our attention. Solar energy is clean, green and sustainable energy. Inspired by photosynthesis in nature, converting solar energy into other forms of energy, such as: chemical energy and thermal energy, has become an ideal way to utilize solar energy. The conversion of solar energy into hydrogen energy has many advantages: (1) hydrogen combustion is green and pollution-free; (2) the calorific value of hydrogen is high (1.43×10^8J / kg), and the calorific val...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/051B01J37/10B01J37/06C01B3/04
CPCB01J27/051B01J35/004B01J37/10B01J37/06C01B3/042Y02E60/36
Inventor 楼宏铭苏行饶成邱学青杨东杰庞煜霞
Owner SOUTH CHINA UNIV OF TECH
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