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Preparation method of MoS2 nano-sheet coated KNbO3 nano-wire piezoelectric/photocatalytic material

A photocatalytic material and nanowire technology, which can be used in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc. performance effect

Active Publication Date: 2019-04-19
UNIV OF SCI & TECH BEIJING
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] So far, KNbO 3 / MoS 2 Piezoelectric / photocatalytic hydrogen production performance has not yet been reported

Method used

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  • Preparation method of MoS2 nano-sheet coated KNbO3 nano-wire piezoelectric/photocatalytic material
  • Preparation method of MoS2 nano-sheet coated KNbO3 nano-wire piezoelectric/photocatalytic material
  • Preparation method of MoS2 nano-sheet coated KNbO3 nano-wire piezoelectric/photocatalytic material

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Embodiment Construction

[0030] The present invention covers any alternatives, modifications, equivalent methods and schemes made on the spirit and scope of the present invention as defined by the claims. Further, in order to make the public have a better understanding of the present invention, some specific details are described in detail in the detailed description of the present invention below. The present invention can be fully understood by those skilled in the art without the description of these detailed parts.

[0031] Preparation of KNbO 3 / MoS 2 Heterostructure photocatalytic materials:

[0032] (1) KNbO was synthesized by hydrothermal method in the first step 3 Nanowires, the specific process is as follows:

[0033] First, 10.942g KOH was dissolved in 15ml of distilled water to form a KOH solution with a concentration of 13mol / L; then 0.874g of metal Nb powder was added to the above-mentioned alkaline solution, and magnetically stirred for 1h; finally, the mixed solution was transferre...

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Abstract

The invention discloses a preparation method of a MoS2 nano-sheet coated KNbO3 nano-wire piezoelectric / photocatalytic material, belonging to the field of photocatalysis. The preparation method of a MoS2 nano-sheet coated KNbO3 nano-wire piezoelectric / photocatalytic material uses niobium powder (Nb), potassium hydroxide (KOH), sodium molybdate (Na2MoO4.2H2O) and thiourea (CN2H4S) as raw materials,and adopts a simple two-step hydrothermal method to prepare the KNbO3 / MoS2 heterostructure piezoelectric / photocatalytic material with good crystallinity. The two-step hydrothermal method is characterized in that KNbO3 nanowires are synthesized through a first hydrothermal reaction, and KNbO3 / MoS2 heterostructure piezoelectric / photocatalytic materials are synthesized through a second hydrothermal reaction. The preparation method provided by the invention is simple, and the experimental conditions are easy to control, and the piezoelectric / ferroelectric characteristics are innovatively utilized,and the photocatalytic performance is maximally optimized by promoting the separation of photo-generated electrons and holes. The significantly improved catalytic performance is due to the synergistic effect of heterostructures and the effect of mechanical vibration induced built-in electric fields to promote charge separation.

Description

technical field [0001] The present invention relates to a kind of MoS 2 Nanosheets coated KNbO 3 The invention relates to a preparation method of a nanowire heterostructure piezoelectric / photocatalytic material, which belongs to the technical field of photocatalytic material preparation. Background technique [0002] Semiconductor photocatalysis, such as photocatalytic hydrogen production and photocatalytic degradation of organic pollutants, is a promising method to solve the world's energy crisis and environmental crisis. A large number of semiconductor photocatalysts including metal oxides, metal sulfides, perovskite metal oxides, etc. have been extensively explored. However, the recombination of photogenerated electrons and holes greatly limits the improvement of photocatalytic performance. To address this issue, many modification methods such as doping, cocatalyst loading, nanostructure design, etc. have been extensively studied. However, the photocatalytic performan...

Claims

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Application Information

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IPC IPC(8): B01J27/051B01J37/10B01J37/03B82Y30/00B82Y40/00C01B3/04
CPCB82Y30/00B82Y40/00C01B3/042B01J27/051B01J37/031B01J37/10C01B2203/0277C01B2203/1041B01J35/39B01J35/33Y02E60/36
Inventor 张波萍贾淑帆李顺
Owner UNIV OF SCI & TECH BEIJING
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