Ordered nanosheet-layer cluster metal-free catalyst and synthesis and application thereof

Abstract

The invention discloses an ordered nanosheet-layer cluster metal-free catalyst and synthesis and application thereof. The synthesis method of the catalyst comprises the following steps: mixing 1,2,4,5-pyromellitic dianhydride with ethylenediamine at a molar ratio of 1:1, and dissolving the mixture in a solvent so as to form a solution; placing the solution in a Teflon lining, putting the lining ina water bath for 10 h or above, then placing the lining at 180 DEG C, performing a hydrothermal reaction for 15 h, taking out the reacted solution, performing natural cooling, filtering out the solidproduct through centrifugation, performing alternate washing with deionized water and ethanol, and performing drying; and grinding the dried solid material into powder, then placing the powder in a tube furnace, performing calcination in a N2 atmosphere, and performing natural cooling so as to obtain the f-CNP NSs. When the ordered nanosheet-layer cluster metal-free catalyst is combined with persulfate, a wide range of pH response is achieved, so that the pH value is not considered in the reaction process; and a good effect of removal and degradation on organic pollutants which has difficultbiodegradation can be achieved under the acidic, neutral and alkaline conditions.

Description

technical field [0001] The invention belongs to the field of water treatment, and in particular relates to an ordered nano-sheet cluster metal-free catalyst and its synthesis and application in degrading refractory organic pollutants in water by activating persulfate. Background technique [0002] With the development of chemical technology, a large number of chemically synthesized materials are used in industrial and agricultural production, resulting in the continuous release of a large number of refractory organic pollutants into the water environment, which seriously threatens the safety of the ecological environment and human health. When traditional physical, chemical and biological techniques cannot effectively remove such refractory organic pollutants in water, it is necessary to develop new catalysts. [0003] In many advanced oxidation technologies, a large number of sulfate radicals (SO 4 -· ), and using a large number of active species generated by this activat...

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Problems solved by technology

However, under weak and alkaline conditions, the iron ions in the solution will form hydroxide precipitates, resulting in a large amount of iron sludge, which will cause inconvenience to the subsequent treatment.

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