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Visible-light-response vanadate photocatalytic material as well as preparation method and application thereof

A photocatalytic material and visible light technology, applied in the direction of light water/sewage treatment, etc., can solve the problems that have not been reported, and achieve the effect of short reaction time, fine powder particles, and good photocatalytic activity

Inactive Publication Date: 2015-07-29
XUZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although publication number 103611550A has reported a kind of preparation method of molybdenum disulfide-silver metavanadate composite nano photocatalyst, publication number 103846096A has reported a kind of silver / silver bromide / silver metavanadate plasma composite photocatalyst and preparation method thereof , but for Ag 2 CaV 4 o 12 The photocatalytic performance of Ag has not been reported yet, so we 2 CaV 4 o 12 The photocatalytic performance of the compound was studied, and it was found that the compound has excellent near-visible light response photocatalytic performance

Method used

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  • Visible-light-response vanadate photocatalytic material as well as preparation method and application thereof
  • Visible-light-response vanadate photocatalytic material as well as preparation method and application thereof
  • Visible-light-response vanadate photocatalytic material as well as preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0038] Embodiment 1: In order to obtain the composite oxide Ag used in the present invention 2 CaV 4 o 12 , prepared by a high-temperature solid-phase method, that is, mixing various oxides or carbonates as raw materials according to the stoichiometric ratio of the target composition, and then synthesizing in an air atmosphere under normal pressure. In addition, in order to effectively utilize light, the size of the photocatalyst in the present invention is preferably at the micron level, or even nanoparticles, and the specific surface area is relatively large, while the oxide powder prepared by the solid-phase synthesis method has relatively large particles and The surface area is small, but the particle diameter can be reduced by pulverizing means such as a ball mill, and the specific steps are as follows.

[0039] First, according to the chemical formula Ag 2 CaV 4 o 12 , respectively weighed silver carbonate Ag 2 CO 3 : 2.758 g, calcium carbonate CaCO 3 : 1.001 g, ...

Embodiment 2

[0046] Embodiment 2: adopt high temperature solid state method to prepare Ag 2 CaV 4 o 12 ,Specific steps are as follows.

[0047] First, according to the chemical formula Ag 2 CaV 4 o 12 , respectively weighed silver carbonate Ag 2 CO 3 : 2.758 g, Calcium Hydroxide Ca(OH) 2 : 0.741 g, vanadium pentoxide V 2 o 5 : 3.640 grams, ground in an agate mortar and mixed uniformly, select the air atmosphere for pre-calcination, the pre-calcination temperature is 400 ℃, the calcination time is 6 hours, then cooled to room temperature, and taken out.

[0048] Then, the mixture calcined for the first time was thoroughly mixed and ground evenly, and then calcined for the second time in an air atmosphere at a calcination temperature of 500° C. for 7 hours, then cooled to room temperature, and taken out.

[0049] Finally, the above mixture is fully ground again and placed in a muffle furnace, and calcined in an air atmosphere at a calcination temperature of 800°C and a calcination ...

Embodiment 3

[0051] Embodiment 3: adopt high temperature solid state method to prepare Ag 2 CaV 4 o 12 ,Specific steps are as follows.

[0052] First, according to the chemical formula Ag 2 CaV 4 o 12 , respectively weighed silver carbonate Ag 2 CO 3 : 2.758 g, calcium sulfate CaSO 4 : 1.641 g, ammonium metavanadate NH 4 VO 3 : 4.679 grams, ground in an agate mortar and mixed evenly, select the air atmosphere for pre-calcination, the pre-calcination temperature is 350 ° C, the calcination time is 7 hours, then cooled to room temperature, and taken out.

[0053] Then, the mixture calcined for the first time was thoroughly mixed and ground evenly, and then calcined for the second time in an air atmosphere at a calcination temperature of 450° C. for 8 hours, then cooled to room temperature, and taken out.

[0054] Finally, the above mixture is fully ground again and placed in a muffle furnace for calcination in an air atmosphere at a calcination temperature of 750°C and a calcinatio...

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Abstract

The invention discloses a visible-light-response vanadate photocatalytic material as well as a preparation method and application thereof. The chemical formula of the vanadate photocatalytic material is Ag2CaV4O12; the vanadate photocatalytic material can be prepared from a high-temperature solid-phase method, a chemical solution method or a coprecipitation method. The prepared visible-light-response vanadate photocatalytic material is good in dispersity, uniform in particle degree, good in chemical stability, and low in preparation cost and equipment requirements; besides, Ag2CaV4O12 has excellent photocatalytic performance, and can efficiently photoactivate and degrade methylene blue under near ultraviolet radiation, so that the visible-light-response vanadate photocatalytic material has the function of decomposing harmful chemical substances under visible light response; the vanadate photocatalytic material is good in photocatalytic stability, and has favorable application prospect.

Description

technical field [0001] The invention relates to a vanadate photocatalytic material responsive to visible light and its preparation method and application, in particular to a photocatalyst Ag for degrading organic pollutants 2 CaV 4 o 12 The preparation method and application thereof belong to the field of inorganic photocatalytic materials. Background technique [0002] At present, with the rapid development of industry, energy and ecological environment issues are more and more worthy of people's attention. How to solve the contradiction between energy shortage and environmental pollution is a major challenge for achieving sustainable development, improving people's quality of life and ensuring national security. problem. Today, the environment we live in usually contains some difficult-to-degrade organic substances, which endanger our health all the time. How to purify environmental pollution economically and effectively has become a hot spot in catalytic science resear...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/68C02F1/30
Inventor 乔学斌
Owner XUZHOU NORMAL UNIVERSITY
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