Cryptomelane type manganese dioxide oxidant with three-dimensional structure as well as preparation method and application thereof

A technology of cryptopotassium manganese ore and manganese dioxide, which is applied in the field of nanomaterials, can solve the problems of poor repeatability, difficulty in large-scale production, and low yield, and achieve the effects of high yield, good repeatability, and safe and simple operation methods
CN113117669APending Publication Date: 2021-07-16LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Publication Date
2021-07-16

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Abstract

The invention discloses a cryptomelane type manganese dioxide oxidant with a three-dimensional structure as well as a preparation method and application thereof. The preparation method comprises the following steps that a uniformly mixed reaction system containing potassium permanganate, divalent manganese salt, cerium salt, bismuth salt and acid is subjected to a reaction at 50-100 DEG C for 5-24 h, the cryptomelane type manganese dioxide oxidant with a three-dimensional structure is prepared, and the molar ratio of potassium permanganate to cerium salt to bismuth salt is 1: (0.015-0.075): (0.012-0.55). The preparation method disclosed by the invention is simple, high in yield and good in repeatability, the used raw materials are low in toxicity, and large-scale production is facilitated. The cryptomelane type manganese dioxide oxidant prepared by the method has a unique center aggregation type cuboid structure and a single cryptomelane crystal phase, can greatly improve the specific surface area and the surface adsorption energy, and can be used as a solid oxidant to directly oxidize and degrade organic pollutants in a water body under a neutral condition.
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Description

technical field

[0001] The invention belongs to the technical field of nanomaterials, in particular to a three-dimensional structure of cryptopotassium manganese ore-type manganese dioxide oxidizer and its preparation method and application, especially to a three-dimensional structure of cryptopotassium manganese ore-type manganese dioxide oxidizer and its preparation method. And its application in oxidative degradation of organic pollutants in water under neutral conditions. Background technique

[0002] Cryptopotassium manganese dioxide, also known as manganese oxide octahedral molecular sieve, is a typical one-dimensional nanofiber linear structure material, which consists of 2x2 manganese oxygen hexahedral structural units arranged in a shared edge to form a potassium ion-containing Pore ​​structure, the pore size is Cryptopotassium manganese dioxide exhibits excellent properties in adsorption, catalysis, oxidation, and conductivity due to its mixed valence state of Mn...

Claims

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