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Metal-doped indium sulfide nanosheets and preparation method and application thereof

A metal-doped, indium sulfide technology, applied in the field of its preparation, metal-doped indium sulfide nanosheets, can solve the problems of limited electronic regulation, complicated preparation process, unfavorable large-scale preparation, etc., to achieve excellent catalytic activity, The preparation process is simple and convenient, and the electronic structure can be adjusted

Inactive Publication Date: 2019-07-05
UNIV OF SCI & TECH OF CHINA
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Problems solved by technology

These methods focus on improving the catalytic activity through interface design or surface defect treatment, which require the use of noble metal catalysts such as Au and the preparation process is complicated, and also require special equipment and instruments, which makes the reaction cost high and is not conducive to large-scale preparation. The regulatory effect is limited, and it is necessary to find a regulatory method to precisely regulate the components
[0005] So far, there has been no literature report on the rapid and large-scale preparation of two-dimensional In with precise and controllable composition, good electronic structure and excellent catalytic activity under simple conditions. 2 S 3 Nanosheet structure method

Method used

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  • Metal-doped indium sulfide nanosheets and preparation method and application thereof
  • Metal-doped indium sulfide nanosheets and preparation method and application thereof
  • Metal-doped indium sulfide nanosheets and preparation method and application thereof

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preparation example Construction

[0036] The invention provides a method for preparing metal-doped indium sulfide nanosheets, comprising: S1) mixing and reacting indium salt, doped metal salt and dialkyldithiocarbamate in an organic solvent to obtain a precursor body complexes; S2) heating the precursor complexes in an amine solvent to obtain metal-doped indium sulfide nanosheets.

[0037] In this application, there is no special limitation on the sources of all raw materials, as long as they are commercially available.

[0038] Wherein, the indium salt is preferably one or more of indium chloride, indium nitrate, indium sulfate and indium acetate; A salt compound of a heterometal, preferably one or more of ferrous salt, cobalt salt, nickel salt and manganese salt, more preferably nickel chloride, cobalt chloride, ferrous chloride, nickel nitrate, cobalt nitrate, One or more of ferrous nitrate, nickel acetate, cobalt acetate, ferrous acetate, nickel sulfate, cobalt sulfate, ferrous sulfate, manganese chloride...

Embodiment 1

[0050] Dissolve 3mmol of sodium diethyldithiocarbamate in 10mL of methanol, add 5mL of methanol solution containing 1mmol of indium chloride and 0.03mmol of manganese chloride, stir well and place it at room temperature at 25°C for 120 minutes, then wash with ethanol , centrifuged, and dried to obtain the InMn-DDTC precursor.

[0051] Add 0.112g of InMn-DDTC precursor to 4g of dodecylamine, keep it airtight after blowing nitrogen for 15 minutes, heat to 200°C and keep it for 30 minutes, then rise to 300°C and keep it for 2 hours. After that, it was washed with acetone and chloroform, centrifuged, and dried to obtain Mn-In 2 S 3 ultrathin nanosheets.

[0052] The Mn-In that utilizes transmission electron microscope to obtain in embodiment 1 2 S 3 The ultra-thin nanosheets were detected, and the transmission electron microscope pictures were obtained as follows: figure 1 shown by figure 1 It can be seen that the Mn-In obtained in Example 1 2 S 3 The average size of the u...

Embodiment 2

[0055] Mn-In 2 S 3 Electrocatalyst and Electroreduction of Carbon Dioxide Test Conditions Using Ultrathin Nanosheets as Active Components.

[0056] 0.2mg Mn-In 2 S 3 Ultrathin nanosheets, 0.8 mg of activated carbon, and 15 μL of 5% Nafion solution were dispersed in 1 mL of ethanol, and ultrasonicated for 1 h to obtain a uniform solution. Then, take the above solution and brush evenly on 1cm×0.5cm carbon paper. The carbon paper was used as the working electrode, the silver / silver chloride electrode was used as the reference electrode, and the graphite rod was used as the counter electrode. The electrolytic solution for electroreduction of carbon dioxide reaction is 40mL potassium bicarbonate aqueous solution with a concentration of 0.1mol / L. Before the reaction, it is necessary to pass carbon dioxide for at least 30 minutes to drive away other gases. The catalytic reaction is carried out in an H-type electrolytic cell, which is separated by a Nafion 115 proton exchange mem...

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Abstract

The invention provides a preparation method of metal-doped indium sulfide nanosheets. The preparation method comprises the steps that S1, indium salt, metal-doped salt and dialkyldithiocarbamate saltare mixed and reacted in an organic solvent to obtain a precursor complex; S2, the precursor complex is heated and reacted in an amine solvent to obtain the metal-doped indium sulfide nanosheets. Compared with the prior art, metal doping is introduced into the indium sulfide nanosheets by controlling synthesis and thermal decomposition of a precursor, the preparation process is simple and easy, massive nanosheets can be prepared, the precursor ratio can be controlled, and the concentration of doped ions can be precisely adjusted. The introduced ions have universality, the nanosheets are uniform in thickness and high in dispersibility, and the catalytic activity of the nanosheets in electroreduction of carbon dioxide is improved. By means of the method, the manganese-doped nanosheets are prepared, and moreover, the nanosheets doped with other ions can be massively prepared, and the preparation method is wide in application prospect.

Description

technical field [0001] The invention belongs to the technical field of two-dimensional nanomaterials, and in particular relates to a metal-doped indium sulfide nanosheet, its preparation method and application. Background technique [0002] The modern global energy economy relies heavily on fossil resources, and the burning of fossil resources will cause environmental problems such as carbon dioxide emissions and greenhouse effects. In order to meet the energy demand of long-term economic growth while reducing environmental pollution, we urgently need to develop a sustainable alternative energy sources. Considering the conversion of renewable electricity such as wind and solar into the global energy supply is one promising approach, however, the inherently intermittent nature of these resources makes storing the generated electricity costly. Electrically reducing carbon dioxide to carbon-based chemicals is the most likely to allay this concern, while at the same time mitiga...

Claims

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Application Information

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IPC IPC(8): B01J27/04B01J35/02C25B3/04C25B11/04B01D53/62B01D53/86C25B3/25
CPCB01J27/04C25B11/04B01D53/8671B01D2257/504B01D2255/806C25B3/25B01J35/33B01J35/40
Inventor 张安杜旭涛曾杰
Owner UNIV OF SCI & TECH OF CHINA
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