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Synthesis method of Z-type Sn3O4/bismuth vanadate quantum dot composite photocatalyst capable of fully decomposing water

A technology of tritin tetroxide and synthesis method, applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, chemical instrument and method, etc., can solve the problem of inability to produce oxygen and realize the inability to fully split water and other problems, to achieve the effect of mild reaction conditions, excellent performance and simple process

Pending Publication Date: 2020-03-31
LANZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the existing tritin tetroxide itself cannot produce oxygen due to the existence of polyvalent tin, which cannot realize the full decomposition of water under visible light catalysis, and to provide a method that can be synthesized using a simple hydrothermal process. Method for Z-type tritin tetroxide / bismuth vanadate quantum dot composite photocatalyst for fully splitting water

Method used

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  • Synthesis method of Z-type Sn3O4/bismuth vanadate quantum dot composite photocatalyst capable of fully decomposing water
  • Synthesis method of Z-type Sn3O4/bismuth vanadate quantum dot composite photocatalyst capable of fully decomposing water
  • Synthesis method of Z-type Sn3O4/bismuth vanadate quantum dot composite photocatalyst capable of fully decomposing water

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specific Embodiment approach 1

[0017] Specific embodiment one: a kind of synthetic method of Z-type tritin tetroxide / bismuth vanadate quantum dot composite photocatalyst that can fully decompose water of the present embodiment, it is to carry out according to the following steps:

[0018] 1. Dissolve stannous chloride dihydrate in deionized water, adjust the pH to 13, stir for 30 minutes and then ultrasonically treat for 5 minutes; then add the treated solution into a high-pressure reactor, and conduct a hydrothermal reaction at 160-200°C for 12- After 20 hours, cool to room temperature, filter, and alternately wash the obtained precipitate with distilled water and absolute ethanol three times, dry at 60-100°C for 12 hours, and grind to obtain tritin tetroxide;

[0019] 2. Dissolve sodium oleate in deionized water, stir for 30 minutes, then add bismuth nitrate pentahydrate into the solution, stir for 30 minutes to obtain solution A; dissolve sodium dodecahydrate orthovanadate in deionized water, stir for 30 ...

specific Embodiment approach 2

[0022] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the pH is adjusted to 13 by using 0.05-0.2M sodium hydroxide solution. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0023] Specific embodiment three: the difference between this embodiment and specific embodiment one is: the mass volume ratio of stannous chloride dihydrate and deionized water is 8g:120mL. Others are the same as in the first embodiment.

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Abstract

The invention relates to a synthetic method of a Z-type Sn3O4 / bismuth vanadate quantum dot composite photocatalyst capable of fully decomposing water, and belongs to the field of photocatalysts. The Z-type Sn3O4 / bismuth vanadate quantum dot composite photocatalyst capable of fully decomposing water is invented to solve the problem that full decomposition of water under visible light catalysis cannot be achieved due to the fact that Sn3O4 cannot produce oxygen in the presence of multivalent stannum. The Z-type Sn3O4 / bismuth vanadate quantum dot composite photocatalyst capable of fully decomposing water can be synthesized through a simple hydrothermal process. The preparation method is simple in process and low in cost, and the obtained Z-type Sn3O4 / bismuth vanadate quantum dot composite photocatalyst can realize full decomposition of water under the catalysis of visible light.

Description

technical field [0001] The invention relates to the field of photocatalysts, in particular to a method for synthesizing a Z-type tritin tetroxide / bismuth vanadate quantum dot composite photocatalyst capable of fully splitting water. Background technique [0002] Visible light semiconductor catalytic technology has been paid attention to due to its outstanding advantages such as simple operation, mild reaction conditions, no secondary pollution, and high utilization rate of sunlight. Tritin tetroxide is a visible light catalyst, and its suitable conduction band and valence band position are very suitable for total water splitting. However, since tritin tetroxide is a multi-component oxide, due to the existence of divalent tin inside it, tritin tetroxide can only produce hydrogen but not oxygen, so it is still unable to fully split water. Contents of the invention [0003] The purpose of the present invention is to solve the problem that the existing tritin tetroxide itself...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/22B01J23/14B01J37/10C01B3/04C09K11/74C09K11/66B82Y20/00B82Y30/00B82Y40/00
CPCB01J23/14B01J23/22B01J37/10C01B3/042C09K11/7457C09K11/661B82Y20/00B82Y30/00B82Y40/00B01J35/39Y02E60/36
Inventor 谢明政陈璐韩卫华王静孙萌迪
Owner LANZHOU UNIVERSITY