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Strontium barium niobate series photo-catalyst normal-temperature degradation hydrocarbon compound

A photocatalyst, barium strontium niobate technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical/physical processes, etc., can solve unseen problems

Active Publication Date: 2015-12-30
烟台科慧科技服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there have been no reports of any form of strontium barium niobate series photocatalysts in the photocatalytic purification of NMHC

Method used

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  • Strontium barium niobate series photo-catalyst normal-temperature degradation hydrocarbon compound
  • Strontium barium niobate series photo-catalyst normal-temperature degradation hydrocarbon compound
  • Strontium barium niobate series photo-catalyst normal-temperature degradation hydrocarbon compound

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] This example provides a ywt%M-Sr x Ba 1-x Nb 2 o 6 A series of photocatalysts, the composition of which is represented by the following formula: Sr x Ba 1-x Nb 2 o 6 , where the value of x is 0.4-0.8, and the value of y is 0. The preparation method is as follows:

[0023] SrCO 3 、BaCO 3 , Nb 2 o 5 And KCl is mixed according to the corresponding metering coefficient ratio, then added with ethanol and ball milled to form a uniform suspension. Dry the suspension to obtain a mixed powder, then transfer it to an alumina crucible, place it in a muffle furnace for 1373K heat treatment for 3 hours, and obtain Sr x Ba 1-x Nb 2 o 6 (0.4≤x≤0.8) powder. Wash with secondary water and ethanol for 3 times to remove the molten salt and obtain pure Sr x Ba 1-x Nb 2 o 6 (0.4≤x≤0.8) photocatalyst, ground for use.

Embodiment 2

[0025] This example provides a ywt%M-Sr x Ba 1-x Nb 2 o 6 A series of photocatalysts, the composition of which is represented by the following formula: ywt%Pt-Sr x Ba 1-x Nb 2 o 6 , where M is Pt, the value of x is 0.4-0.8, and the value of y is 0.5-4. The preparation method is as follows:

[0026] Take by weighing the Sr prepared by embodiment 1 respectively x Ba 1-x Nb 2 o 6 (0.4≤x≤0.8) catalyst 0.2g, add 150mL20% methanol solution, and the corresponding concentration of H 2 PtCl 6 Samples were obtained after 10 h of light exposure. After washing 3 times with deionized water and alcohol, dry to obtain ywt% Pt-Sr x Ba 1-x Nb 2 o 6 (0.4≤x≤0.8,0.5≤y≤4) series of photocatalysts. Example 3:

Embodiment 3

[0027] This example provides a ywt%M-Sr x Ba 1-x Nb 2 o 6 A series of photocatalysts, the composition of which is represented by the following formula: ywt%Ag-Sr x Ba 1-x Nb 2 o 6 , where M is Ag, the value of x is 0.4-0.8, and the value of y is 1. The preparation method is as follows:

[0028] Take by weighing the Sr prepared by embodiment 1 respectively x Ba 1-x Nb 2 o 6 (0.4≤x≤0.8) Catalyst 0.2g, add 150mL20% methanol solution, and corresponding concentration of AgNO 3 , the sample was obtained after 10 h of light. 1wt% Ag-Sr x Ba 1-x Nb 2 o 6 (0.4≤x≤0.8) series of photocatalysts.

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Abstract

The invention relates to a ywt%M-SrxBa1-xNb2O6 series photo-catalyst normal-temperature degradation non-methane hydrocarbon (NMHC) technology. The catalyst is shown as a general formula: ywt%M-SrxBa1-xNb2O6, wherein M is one of Pt, Ag, Au, Pd, Ru, Fe, Co, Ni and Cu; x is greater than or equal to 0.4 and less than or equal to 0.8; y is greater than or equal to 0 and less than or equal to 4. The ywt%M-SrxBa1-xNb2O6 series photo-catalyst has the advantages of low cost, high photo-catalytic activity and high stability, and NMHC gas can be subjected to efficient photo-catalytic degradation at a normal temperature by simulation of sunlight radiation. Meanwhile, the photo-catalyst is very easy to recycle, and has a very good application prospect in removal of NMHC gas from atmospheric air at the normal temperature and a normal pressure and under a mild condition.

Description

technical field [0001] The invention relates to a technology for degrading non-methane total hydrocarbons (NMHC) at normal temperature by a strontium barium niobate system photocatalyst, belonging to the field of inorganic photocatalytic materials. Background technique [0002] According to the "China Environmental Status Bulletin" issued by the Ministry of Environmental Protection of the People's Republic of China in 2014, in 2014, only less than 10% of the cities in the country met the air quality standards. The main substances that cause air pollution include carbon monoxide (CO), nitrogen oxides (NO x ), hydrocarbons (HC), sulfur oxides and particulate matter (PM), etc. Among hydrocarbons, non-methane total hydrocarbons (NMHC) are an important component. Non-methane total hydrocarbons, that is, all volatile hydrocarbons except methane. This type of substance has greater photochemical activity and is a precursor to the formation of photochemical smog. The anthropogeni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/20B01J23/847B01J23/68B01J23/648B01D53/86B01D53/72
CPCY02C20/20
Inventor 杨明学龙佩青易志国
Owner 烟台科慧科技服务有限公司
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