A kind of samarium oxychloride nanosheet and its preparation method and application

Abstract

The invention discloses a samarium oxychloride nanosheet and its preparation method and application. Its structure is an amorphous smoky two-dimensional samarium oxychloride nanosheet. The preparation process is as follows: (1) first trishydroxymethylaminomethane and Mix hydrochloric acid to obtain a buffer solution, then add a soluble samarium source and graphene oxide for ultrasonic treatment to obtain a uniformly dispersed suspension, and obtain a precursor after solid-liquid separation and drying after the reaction; (2) the precursor is burned at 500-600°C Burn to get samarium oxide nanosheets. The inventive amorphous smoky two-dimensional samarium oxychloride nanosheets are used as photocatalytic N 2 and H 2 When O reacts to synthesize ammonia, it does not need to add any sacrificial agent, and reacts NH at room temperature 3 The yield reached 426μmol·g cat. –1 h –1 , for the rational design of photocatalytic N 2 Fixed high-efficiency catalysts improve new ideas.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic synthesis of ammonia, in particular to an amorphous smoky two-dimensional samarium oxychloride nanosheet and a preparation method thereof, and its application as a photocatalytic ammonia synthesis catalyst. Background technique [0002] Rare earth oxides have become important emerging materials due to their unique properties. However, at present, the preparation methods of rare earth oxides in the academic circle are mainly limited to the synthesis of ultrafine particles of rare earth oxides. There are few studies on the synthesis methods of two-dimensional rare earth oxides. The current synthesis methods are relatively few, only similar to the mineralizer method. Less methods. In terms of preparation methods, rare earth-based oxyhalides use traditional solid-state reactions, which generally require higher temperatures, such as 900 degrees Celsius. However, traditional solid-state reactio...

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Problems solved by technology

The adsorption and activation of nitrogen severely limit the photocatalytic synthesis of NH 3 s efficiency

In addition, compared with the normal hydrogen electrode (NHE), the N 2 - and N 2 h - The reduction potentials of such intermediates are as high as -4.2V and -3.2V, respectively, which hinder the photocatalyst to N 2 Molecular Electron Transfer

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