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Photocatalytic material Ag/AgMO2 and preparation method thereof

A technology of photocatalytic materials and solid-phase methods, applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve problems that are not enough to guide large-scale industrial applications of photocatalytic technology To achieve the effect of improving the photocatalytic efficiency, expanding the response, and benefiting industrial production

Inactive Publication Date: 2013-12-11
CHANGSHA UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Since 1972, Japanese scholars have reported TiO 2 Since the photocatalytic phenomenon, for more than 40 years, although people have made great progress in the cognition and application of photocatalytic phenomena, due to the limitation of cognitive means and cognitive level, the current research results on the photocatalytic mechanism are still insufficient. To guide the large-scale industrial application of photocatalytic technology
On the other hand, existing TiO 2 , ZnO and WO 3 The photoresponse range of typical photocatalytic materials is narrow, the quantum conversion efficiency is low, and the solar energy utilization rate is low, which is still the bottleneck restricting the application of photocatalytic materials.

Method used

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  • Photocatalytic material Ag/AgMO2 and preparation method thereof
  • Photocatalytic material Ag/AgMO2 and preparation method thereof
  • Photocatalytic material Ag/AgMO2 and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Ag / AgInO 2 preparation of

[0043] With In(NO) 3 and Na 2 CO 3 As raw material, weigh 0.015mol In(NO) 3 and 0.03mol Na 2 CO 3 Place in an agate mortar, add 0.01mol of NaCl, mix and grind for 10 minutes, transfer the mixture to a corundum crucible, and calcinate at 850°C for 3 hours to obtain the product NaInO 2 . The prepared NaInO 2 with AgNO 3 、KNO 3 According to the molar ratio of 1:1.5:2, mix and grind in an agate mortar for 10 minutes, transfer the mixture to a corundum crucible, calcinate at 270°C for 8h, increase the calcining temperature to 500°C and keep it for 3h, and the obtained product is deionized Wash with water, centrifuge, dry in an oven at 80°C, and grind to obtain Ag / AgInO 2 .

Embodiment 2

[0045] Ag / AgInO 2 preparation of

[0046] to In 2 o 3 and Na 2 O is the raw material, weigh 0.015mol In 2 o 3 and 0.03mol Na 2 O was placed in an agate mortar, 0.02mol of NaCl was added, mixed and ground for 10 minutes, the mixture was transferred to a corundum crucible, and calcined at 850°C for 3 hours to obtain the product NaInO 2 . The prepared NaInO 2 with AgNO 3 、KNO 3 According to the molar ratio of 1:2:1.5, mix and grind in an agate mortar for 10min, transfer the mixture to a corundum crucible, calcinate at 220°C for 10h, increase the calcining temperature to 450°C and keep it for 3h, and the obtained product is deionized Wash with water, centrifuge, dry in an oven at 80°C, and grind to obtain Ag / AgInO 2 .

Embodiment 3

[0048] Ag / AgAlO 2 preparation of

[0049] with Al(NO) 3 and Na 2 CO 3 As raw material, weigh 0.015mol Al(NO) 3 and 0.03mol Na 2 CO 3 Place in an agate mortar, add 0.01mol of NaCl, mix and grind for 10 minutes, transfer the mixture to a corundum crucible, and calcinate at 850°C for 3 hours to obtain the product NaInO 2 . The prepared NaAlO 2 , AgNO 3 、KNO 3 According to the molar ratio of 1:1.5:2, mix and grind in an agate mortar for 10 minutes, transfer the mixture to a corundum crucible, calcinate at 250°C for 10h, increase the calcining temperature to 500°C and keep it for 3h, and the obtained product is deionized Wash with water, centrifuge, dry in an oven at 80°C, and grind to obtain Ag / AgAlO 2 . image 3 (b) is the prepared Ag / AgAlO 2 The scanning electron microscope picture, it can be seen from the figure that the prepared Ag / AgAlO 2 It is polyhedral, with uniform size distribution, and the particle size is 0.2-0.8 μm.

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Abstract

The invention discloses a photocatalytic material Ag / AgMO2 and a preparation method thereof. The photocatalytic material is polyhedral and is a composite structure formed by elementary substance Ag nanoparticles and AgMO2, wherein M is Ga, Al or In, and the grain size of the material is 0.2-1 micron. In addition, the novel photocatalytic material Ag / AgMO2 (M=Ga, Al or In) is prepared by a two-step method, and the method comprises the following steps of: firstly, preparing NaMO2 (M=Ga, Al or In) by a solid phase method, and then synthesizing the Ag / AgMO2 (M=Ga, Al or In) by using the prepared NaMO2 as a precursor and introducing superfluous Ag-containing compound. The preparation method of the photocatalytic material provided by the invention is unique in process, simple in preparation process and easy to operate; the prepared Ag / AgMO2 (M=Ga, Al or In) has plasma effect, and is capable of enhancing absorption to visible light, and also the Ag nanoparticles are capable of effectively capturing photoelectrons; as a result, the number of electrons compounded with holes is reduced, and more photoholes are converted into the hydroxyl radicals with oxidizing ability; and the photocatalytic efficiency is greatly improved.

Description

technical field [0001] The invention relates to a novel photocatalytic material of noble metal element / semiconductor metal oxide and its preparation method, in particular to a photocatalytic material Ag / AgMO with plasma effect 2 (M=Ga, Al or In) and its preparation method. Background technique [0002] Since 1972, Japanese scholars have reported TiO 2 Since the photocatalytic phenomenon, for more than 40 years, although people have made great progress in the cognition and application of photocatalytic phenomena, due to the limitation of cognitive means and cognitive level, the current research results on the photocatalytic mechanism are still insufficient. To guide the large-scale industrial application of photocatalytic technology. On the other hand, existing TiO 2 , ZnO and WO 3 Typical photocatalytic materials such as narrow photoresponse range, low quantum conversion efficiency, and low solar energy utilization are still bottlenecks restricting the application of pho...

Claims

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Application Information

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IPC IPC(8): B01J23/50B01J23/66
Inventor 张向超张世英贾艳荣许第发游洋罗卓
Owner CHANGSHA UNIVERSITY
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