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Silver-doped zirconium dioxide photocatalyst, and preparation method and application thereof

A technology of zirconium dioxide and photocatalyst, which is applied in metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, chemical instrument and method, etc., to achieve low production cost, reduce bandgap width, improve The effect of photocatalytic performance

Active Publication Date: 2015-04-01
海宁经开产业园区开发建设有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are relatively few reports on dissimilar metal-doped zirconia, especially the reports on silver-doped zirconia photocatalysts that can be applied to photocatalytic water splitting

Method used

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  • Silver-doped zirconium dioxide photocatalyst, and preparation method and application thereof
  • Silver-doped zirconium dioxide photocatalyst, and preparation method and application thereof
  • Silver-doped zirconium dioxide photocatalyst, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Take 6 parts of industrial grade zirconia 1.08g, put them into a muffle furnace, and calcinate at 450°C for 5h to obtain intermediate sample 1; put intermediate sample 1 into 10mL of 10mol / L NaOH solution and stir, drop Add 0.1mo / L of AgNO 3 solution, each part of AgNO 3 The dripping amount of the solution is calculated based on the mass fraction of silver in zirconia being 0%, 0.1%, 0.2%, 0.4%, 0.6%, and 1%, and the stirring is continued for 1h to obtain the intermediate sample 2; the intermediate sample 2 Put it in an autoclave, and conduct a hydrothermal reaction at 180°C for 24 hours to obtain an intermediate sample 3; then put the intermediate sample 3 into a centrifuge tube, wash with centrifugation until the pH value of the supernatant is 7, and dry it at room temperature to obtain different Silver-doped zirconia photocatalysts in silver-doped amounts. When the silver doping amount is 0%, that is, the silver-free zirconium dioxide photocatalyst, its particle si...

Embodiment 2

[0020] Take 4 parts of industrial grade zirconia 1.08g, put them into a muffle furnace, and calcinate at 300°C for 5h to obtain an intermediate sample 1; put the intermediate sample 1 into 10mL of 6mol / L NaOH solution and stir, drop Add 0.45mo / L of AgNO 3 solution, AgNO 3 The dripping amount of the solution is calculated based on the mass fraction of silver in zirconia being 0.2%. Continue to stir for 1 hour to obtain intermediate sample 2; , hydrothermal reaction at 180°C and 240°C for 48 hours to obtain intermediate sample 3; then put intermediate sample 3 into a centrifuge tube, centrifuge and wash until the pH value of the supernatant was 7, and dry it at room temperature to obtain different hydrothermal reaction samples. temperature of silver-doped zirconia photocatalysts. The hydrogen production capacity of silver-doped zirconia photocatalysts at different hydrothermal reaction temperatures was evaluated using the device and method in Example 1. The relationship betwe...

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Abstract

The invention discloses a silver-doped zirconium dioxide photocatalyst which is mainly prepared from the following steps: 1) taking industrial-grade zirconium dioxide, putting in a muffle furnace, and carrying out high-temperature calcination to obtain an intermediate sample 1; 2) putting the intermediate sample 1 in a strongly alkaline solution, dropwisely adding a silver-ion-containing water solution while stirring, and continuing stirring to obtain an intermediate sample 2; 3) putting the intermediate sample 2 into a high-pressure autoclave, and carrying out hydrothermal reaction to obtain an intermediate sample 3; and 4) putting the intermediate sample 3 into a centrifuge tube, carrying out centrifuge washing until the pH value of the supernate is 7, and drying at normal temperature to obtain the silver-doped zirconium dioxide photocatalyst. The invention also discloses application of the silver-doped zirconium dioxide photocatalyst in photocatalytic water decomposition. The silver-doped zirconium dioxide photocatalyst fills up the blank in the silver-doped zirconium dioxide photocatalyst in the prior art, and has the advantages of uniform size, high photocatalytic water decomposition efficiency, simple preparation method and low production cost.

Description

technical field [0001] The invention relates to the field of photocatalysts, in particular to a silver-doped zirconia photocatalyst and its preparation method and application. Background technique [0002] With the decrease of fossil energy such as coal and oil, the search for new alternative energy sources has drawn widespread attention from all countries. Solar energy is an inexhaustible and inexhaustible energy source, and scientists are also working hard to convert solar energy into storable electrical energy and chemical energy. Japanese scholars Fujishima and Honda discovered TiO in 1972 2 The phenomenon that the electrode can split water to generate hydrogen reveals the possibility of using solar energy to split water to generate hydrogen. Using solar light to decompose water to produce clean energy H 2 , has become the dream of human beings. [0003] Zirconia (ZrO 2 ) is a high temperature and corrosion resistant inorganic non-metallic material with good stabili...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/50B82Y30/00B82Y40/00C01B3/04
CPCY02E60/36
Inventor 马莉
Owner 海宁经开产业园区开发建设有限公司
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