Indium phosphide-indium oxide p-n junction porous microsphere composite material as well as preparation method and application thereof

A technology of porous microspheres and composite materials, applied in the direction of carbon monoxide, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of low activity, application limitations, and difficulty in separating and transferring photogenerated electrons and holes, and achieve High selectivity, accelerated transfer and transport, good carbon dioxide reduction performance

Active Publication Date: 2020-09-08
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the usual sense of In 2 o 3 The activity is low, and the photogenerated electrons and holes are difficult to be effectively separated and transferred, which makes it very limited in application
Therefore, it is still a great challenge to develop efficient and low-energy methods to synthesize highly stable and highly active multilayer, porous heterogeneous photocatalysts for efficient emission reduction.

Method used

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  • Indium phosphide-indium oxide p-n junction porous microsphere composite material as well as preparation method and application thereof
  • Indium phosphide-indium oxide p-n junction porous microsphere composite material as well as preparation method and application thereof
  • Indium phosphide-indium oxide p-n junction porous microsphere composite material as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Step 1, add tartaric acid (2mmol), indium chloride (1mmol) and L-cysteine ​​(6mmol) separately into a 50mL Teflon-lined stainless steel autoclave for a total volume of 18mL (V 去离子水 :V 三乙烯四胺 =2:1) ​​in a mixed solvent of deionized water and triethylenetetramine (TETA), after stirring evenly, the autoclave was sealed, and treated at 160°C in an air atmosphere for 24h, and naturally cooled to room temperature, the white precipitates were respectively Wash with deionized water and absolute ethanol, and dry in a vacuum oven to obtain InS-TETA;

[0026] Step 2: Weigh 10 mg of InS-TETA obtained in Step 1 into a 20 mL Teflon-lined stainless steel autoclave, add 12 mL of deionized water as a solvent, and keep stirring to form a uniform solution. Seal the autoclave and react at 180 °C for 10 hours in an air atmosphere to obtain a yellow precipitate, wash the precipitate with deionized water and absolute ethanol, and dry the precipitate in a vacuum oven to obtain a layered porous...

Embodiment 2

[0030] In step 1, tartaric acid (1 mmol), indium chloride (0.5 mmol) and L-cysteine ​​(5 mmol) were added separately into a 50 mL Teflon-lined stainless steel autoclave for a total volume of 15 mL (V 去离子水 :V 三乙烯四胺 =1:1) in a mixed solvent of deionized water and triethylenetetramine (TETA), after stirring evenly, the autoclave was sealed, and treated at 140°C for 30h in an air atmosphere, and naturally cooled to room temperature, the white precipitates were respectively Wash with deionized water and absolute ethanol, and dry in a vacuum oven to obtain InS-TETA;

[0031] Step 2: Weigh 8 mg of InS-TETA obtained in Step 1 into a 20 mL Teflon-lined stainless steel autoclave, add 10 mL of deionized water as a solvent, and keep stirring to form a uniform solution. Seal the autoclave and react at 160 °C for 12 hours in an air atmosphere to obtain a yellow precipitate, wash the precipitate with deionized water and absolute ethanol, and dry the precipitate in a vacuum oven to obtain a ...

Embodiment 3

[0035] Step 1, add tartaric acid (3mmol), indium chloride (2mmol) and L-cysteine ​​(8mmol) separately into a 50mL Teflon-lined stainless steel autoclave for a total volume of 20mL (V 去离子水 :V 三乙烯四胺 =3:2) in a mixed solvent of deionized water and triethylenetetramine (TETA), after stirring evenly, the autoclave was sealed, and treated at 180°C in an air atmosphere for 20h, and naturally cooled to room temperature, the white precipitates were respectively Wash with deionized water and absolute ethanol, and dry in a vacuum oven to obtain InS-TETA;

[0036] Step 2: Weigh 12 mg of InS-TETA obtained in Step 1 into a 20 mL Teflon-lined stainless steel autoclave, add 15 mL of deionized water as a solvent, and keep stirring to form a uniform solution. Seal the autoclave and react at 200 °C for 8 hours in an air atmosphere to obtain a yellow precipitate, wash the precipitate with deionized water and absolute ethanol, and dry the precipitate in a vacuum oven to obtain a layered porous In...

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Abstract

The invention provides an indium phosphide-indium oxide p-n junction porous microsphere composite material as well as a preparation method and application thereof. The preparation method comprises thesteps: performing air oxidation on a corresponding In2S3 precursor through a simple hydrothermal reaction technology to synthesize nano-scale porous layered In2O3 microspheres, and performing partialphosphorization by taking sodium hypophosphite as a phosphorus source and adopting a gas-solid reaction to prepare the indium phosphide-indium oxide p-n junction porous microsphere composite material. The indium phosphide-indium oxide p-n junction porous microsphere composite material has more active sites and is stable in structure, the porous p-n junction can accelerate transfer and transmission of photo-generated carriers, and the indium phosphide-indium oxide p-n junction porous microsphere composite material has obvious advantages in photocatalytic carbon dioxide reduction.

Description

technical field [0001] The invention relates to the technical field of semiconductor nanomaterials, in particular to an indium phosphide-indium oxide p-n junction porous microsphere composite material and its preparation method and application. Background technique [0002] In recent years, with the outbreak of the energy crisis, the development of new energy is an urgent problem in today's society. The use of sunlight to produce hydrogen by photolysis of water under the action of catalysts has very important research value and application prospects for alleviating the energy shortage and environmental pollution problems faced by today's society. Since 1979, Inoue et al. of the University of Tokyo successfully used WO 3 、TiO 2 , CdS and other inorganic semiconductor materials, CO 2 Since the reduction of aqueous solutions to various hydrocarbon fuels, people have invested a lot of energy in studying the photocatalytic carbon dioxide reduction performance of various semico...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/14C01B32/40
CPCB01J27/14B01J35/004C01B32/40
Inventor 张兵王蕾赵博航刘大李黄义
Owner TIANJIN UNIV
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