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A kind of bimetallic modified polyacid compound and its preparation method and application

A multi-acid compound and bimetallic technology, applied in the field of compound preparation, can solve the problems of limited catalytic performance, troublesome separation and recovery, and limited practical application, and achieve the effect of high reactivity and mild reaction conditions

Inactive Publication Date: 2017-12-22
HEILONGJIANG UNIV OF CHINESE MEDICINE
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  • Abstract
  • Description
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Problems solved by technology

Unfortunately, the specific surface area of ​​solid polyacid is only 1-10m 2 / g, so that there are few acid, oxidation or photooxidation active sites on the surface, which greatly limits the exertion of its inherent catalytic performance
Furthermore, since the POM has a strong It is acidic and dissolves rapidly in polar solvents, which brings great trouble to its separation and recovery, thus limiting its practical application

Method used

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  • A kind of bimetallic modified polyacid compound and its preparation method and application
  • A kind of bimetallic modified polyacid compound and its preparation method and application
  • A kind of bimetallic modified polyacid compound and its preparation method and application

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Embodiment

[0039] Basic saffron is prepared into a 10.0 mg / L standard solution (basic saffron solution). Take 100ml of the standard solution in a 250mL beaker, and dissolve 150mg of the compound therein. The mixed solution was supercharged for half an hour. At room temperature (25° C.), the mixed solution was stirred for two hours in the dark to reach the surface adsorption equilibrium of the catalyst particles. Take 3.0 ml of the solution at this time as the initial concentration data of the catalyst. Thereafter, a 125W high-pressure Hg lamp was used as an ultraviolet light source for continuous irradiation, and 3.0ml samples of the mixed solution were taken out at 30, 60, 90, 120, 150, and 180 min, respectively. All the samples taken out were centrifuged, and the supernatant liquid was measured for ultraviolet absorbance. The catalysts collected after centrifugation were rinsed with water and ethanol, and then dried, so as to be used for the next repeated catalytic reaction.

[0040]...

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Abstract

The invention discloses a bimetallic modified polyacid compound and its preparation method and application. The crystal color of the compound is colorless, and its chemical formula is [La(H2O)9]{[La(H2O)6]2Ag[La( H2O)4SiW11O39]2}, a [La(H2O)4SiW11O39]5‑cluster monosubstituted by two rare earths, composed of an Ag+ cation, two [La(H2O)6]3+ fragments and a [La(H2O)9 ]3+ isolated fragments. The present invention uses H4SiW12O40 as a precursor, uses rare earth La3+ ions and Ag+ ions as substitution and modification groups, and adopts a hydrothermal synthesis method to design and prepare a green solid 4d / 4f bismuth with high reactivity, mild reaction conditions, and recyclability. Metal-modified multi-acid composite catalysts.

Description

technical field [0001] The invention relates to the field of compound preparation, in particular to a double-modified polyacid compound and its preparation method and application. Background technique [0002] Dye wastewater has always been a thorny problem in wastewater treatment due to technical difficulties in the removal of chroma and mineralization of complex and refractory organic matter, huge wastewater discharge, high toxicity, and poor biodegradability. There are many problems, the catalytic effect is not good, and the treatment methods that can be applied to the actual dye wastewater treatment with good economic effect and high efficiency are very limited. With the increase of people's awareness of environmental protection and the continuous improvement of domestic emission pollution standards, it is very meaningful to design and prepare new economical, effective and environmentally friendly photocatalytic dyes and to study their wastewater treatment and environmen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/68C02F1/32
Inventor 张春晶付蕾庞海军
Owner HEILONGJIANG UNIV OF CHINESE MEDICINE
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