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Nanometer flake cerium-doped bismuth molybdate catalyst, as well as preparation method and application thereof

A nanosheet-like, cerium-doped technology, applied in chemical instruments and methods, botanical equipment and methods, catalysts for physical/chemical processes, etc., can solve the problems of thick nanosheets, cumbersome steps, poor uniformity, etc., to promote absorption , The preparation process is simple, and the effect of reducing the use of acid and alkali

Inactive Publication Date: 2016-02-03
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Anukorn Phuruangrate reported a synthesis method of cerium-doped bismuth molybdate nanomaterials in his research (Journal of Nanomaterials, 2014, 2014, 934165), but the nanosheets of cerium-doped bismuth molybdate materials reported in this article are thick and uniform Poor stability, and the pH of the reaction solution needs to be adjusted during the synthesis process, the steps are cumbersome and easy to cause acid-base pollution

Method used

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  • Nanometer flake cerium-doped bismuth molybdate catalyst, as well as preparation method and application thereof
  • Nanometer flake cerium-doped bismuth molybdate catalyst, as well as preparation method and application thereof
  • Nanometer flake cerium-doped bismuth molybdate catalyst, as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] A kind of nano flake cerium doped bismuth molybdate catalyst, its preparation method comprises the steps:

[0031] 1) Add 1 mmol of bismuth nitrate pentahydrate and 0.5 mmol of sodium molybdate dihydrate to water, add 0.5 mmol of cerium nitrate hexahydrate under stirring conditions, and continue stirring for 2 hours until the raw materials are evenly mixed to obtain a reaction solution;

[0032] 2) The obtained reaction solution was placed in a stainless steel autoclave lined with polytetrafluoroethylene, heated to 180°C for 24 hours, and the obtained precipitate was centrifuged to remove residual solutes, dried and cooled to obtain the final product.

[0033] The product obtained in this embodiment is analyzed by X-ray diffraction, the results are shown in figure 1 , the main peak in the figure is consistent with the standard spectrum JCPDS10-221 of the orthorhombic phase, and no other impurity peaks appear, but the positions of the peaks are all shifted to high angles...

Embodiment 2

[0048] A kind of nano flake cerium doped bismuth molybdate catalyst, its preparation method comprises the steps:

[0049] 1) Add 1 mmol of bismuth nitrate pentahydrate and 0.5 mmol of sodium molybdate dihydrate to water, add 0.75 mmol of cerium nitrate hexahydrate under stirring conditions, and continue stirring for 2 hours until the raw materials are evenly mixed to obtain a reaction solution;

[0050] 2) Place the obtained reaction solution in a stainless steel autoclave lined with polytetrafluoroethylene, heat it to 170°C for 20 hours, and then carry out centrifugal washing to remove the residual solute, and dry and cool to obtain the nanosheet Cerium doped bismuth molybdate catalyst.

Embodiment 3

[0052] A kind of nano flake cerium doped bismuth molybdate catalyst, its preparation method comprises the steps:

[0053] 1) Add 1.5 mmol of bismuth nitrate pentahydrate and 0.5 mmol of sodium molybdate dihydrate into water, add 0.25 mmol of cerium nitrate hexahydrate under stirring conditions, and continue stirring for 2 hours until the raw materials are evenly mixed to obtain a reaction solution;

[0054] 2) Place the obtained reaction solution in a stainless steel autoclave lined with polytetrafluoroethylene, heat it to 160°C and react for 20 hours, then carry out centrifugal washing to remove the residual solute, and dry and cool to obtain the nanosheet Cerium doped bismuth molybdate catalyst.

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Abstract

The invention discloses a preparation method of a nanometer flake cerium-doped bismuth molybdate catalyst. A simple one-step hydrothermal method is adopted; the PH of reaction liquor is free from being adjusted; the method is green and is free from acid-base pollution. A nanometer flake cerium-doped bismuth molybdate material can be served as a visible light response photocatalyst and has a uniform flake appearance with the average thickness being 20-30nm; a relatively thin flake structure and cerium ions are introduced, so that the absorption for photons is promoted, the high-efficient separation for a photon-generated carrier is realized and the ultrahigh photocatalytic performance is shown under the irradiation of visible light; the catalyst has relatively high catalytic activity at the aspects of degradation of dye wastewater and killing of water bacteria; the application prospect is wide.

Description

technical field [0001] The invention belongs to the technical field of preparation of photocatalytic materials, and in particular relates to a nanosheet-shaped cerium-doped bismuth molybdate catalyst and a preparation method and application thereof. Background technique [0002] Water disinfection is very important to human health. According to statistics, tens of thousands of deaths and millions of disease cases are directly caused by water contaminated by microorganisms every year. For the disinfection of water bodies, there are many disadvantages in traditional disinfection methods, such as the use of chloride or ozone disinfection methods will lead to the formation of by-products, because chlorine or ozone will generate some organic compounds in the water body during the disinfection process. Organic ligands, and these organic ligands have a certain degree of toxicity, and some are even very harmful to the human body; ultraviolet disinfection does not require the introdu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/28B82Y30/00B82Y40/00C02F1/30A01N59/16A01P1/00
Inventor 陈嵘代赞杨浩赵慧平
Owner WUHAN INSTITUTE OF TECHNOLOGY
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