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Preparation method of oxygen-deficient VIB group element oxide quantum dots, prepared quantum dots and application

A family element and oxygen-deficient technology, which is applied in the field of oxygen-deficient oxidized VIB group element quantum dots and its preparation, can solve the problem of few synthesis methods of tungsten oxide and molybdenum oxide quantum dots, difficulties in mass production of VIB group element quantum dots, and harsh synthesis conditions and other problems, to achieve the effect of excellent performance, novel synthesis method and simple preparation process

Active Publication Date: 2020-09-15
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Although tungsten oxide and molybdenum oxide quantum dots have good application prospects in many fields, there are few synthesis methods for tungsten oxide and molybdenum oxide quantum dots, and the synthesis conditions are harsh, which makes mass production of quantum dots of VIB group elements such as tungsten oxide and molybdenum oxide difficult difficulty

Method used

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  • Preparation method of oxygen-deficient VIB group element oxide quantum dots, prepared quantum dots and application
  • Preparation method of oxygen-deficient VIB group element oxide quantum dots, prepared quantum dots and application
  • Preparation method of oxygen-deficient VIB group element oxide quantum dots, prepared quantum dots and application

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Embodiment 1

[0040] An oxygen-deficient tungsten oxide quantum dot (WO 3-x QDs) preparation method, comprising the following steps:

[0041] S1. Mix 10 mg of tungsten disulfide powder with 50 mL of dimethylformamide to form a mixed solution; S2. Sonicate the mixed solution for 80 minutes at a power of 240W to obtain a black solution; S3. Stir the black solution at 160°C and 700rpm Reflux for 2 hours under conditions to obtain a reflux solution; S4, centrifuge the reflux solution at 1000 rpm for 30 minutes to obtain a supernatant; S5, heat the supernatant at 60° C. for 5 hours under vacuum conditions, and wash the precipitate with ultrapure water; S6, drying the precipitate by rotary evaporation at 60°C to obtain an oxygen-deficient tungsten oxide quantum dot solid; S7, dispersing the solid in ultrapure water to obtain an oxygen-deficient tungsten oxide quantum dot solution.

Embodiment 2

[0043] An oxygen-deficient tungsten oxide quantum dot (WO 3-xThe preparation method of QDs) comprises the following steps: S1, mixing 20 mg of tungsten disulfide powder with 50 mL of dimethylformamide to form a mixed solution; S2, ultrasonicating the mixed solution for 120 minutes at a power of 240W to obtain a black solution; S3 1. Reflux the black solution at 140°C and 700rpm for 3 hours to obtain a reflux solution; S4. Centrifuge the reflux solution at 2000rpm for 30 minutes to obtain a supernatant; S5. Heat the supernatant at 70°C under vacuum 2 hours, and wash the precipitate with ultrapure water; S6, dry the precipitate by rotary evaporation at 80°C to obtain an oxygen-deficient tungsten oxide quantum dot solid; S7, disperse the solid in ultrapure water to obtain an oxygen-deficient tungsten oxide quantum dot solution.

Embodiment 3

[0045] An oxygen-deficient tungsten oxide quantum dot (WO 3-x The preparation method of QDs) comprises the following steps: S1, mixing 30 mg of tungsten disulfide powder with 50 mL of dimethylformamide to form a mixed solution; S2, supercharging the mixed solution for 160 minutes at a power of 240W to obtain a black solution; S3 1. Reflux the black solution for 4 hours at 140°C and 700rpm stirring to obtain a reflux solution; S4. Centrifuge the reflux solution at 3000rpm for 30min to obtain a supernatant; S5. Heat the supernatant at 60°C under vacuum 3 hours, and wash the precipitate with ultrapure water; S6, dry the precipitate by rotary evaporation at 60°C to obtain an oxygen-deficient tungsten oxide quantum dot solid; S7, disperse the solid in ultrapure water to obtain an oxygen-deficient tungsten oxide quantum dot solution.

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Abstract

The invention provides a preparation method of oxygen-deficient VIB group element oxide quantum dots and the prepared quantum dots and application thereof, and the preparation method comprises the following steps: mixing VIB group element sulfide powder with dimethylformamide to form a mixed solution; carrying out ultrasonic treatment on the mixed solution to obtain a black solution; stirring andrefluxing the black solution to obtain a reflux solution; centrifuging the reflux solution to obtain a supernatant, heating the supernatant, and washing the precipitate; drying the precipitate to obtain an oxygen-deficient VIB group element oxide quantum dot solid; and dispersing the solid in ultrapure water to obtain an oxygen-deficient VIB group element oxide quantum dot solution. The preparation method of the oxygen-deficient VIB group oxide element quantum dot has the advantages that the preparation process is simple, large-scale preparation can be realized, and the prepared oxygen-deficient VIB group oxide element quantum dot is a novel nanometer material and can be applied to photocatalysis, supercapacitors, lithium battery information storage materials and biological medicines.

Description

technical field [0001] The invention belongs to the technical field of preparation of new nanometer materials, and relates to the preparation of tungsten oxide and molybdenum oxide quantum dots, in particular to an oxygen-deficient oxidized VIB group element quantum dot and its preparation method and application. Background technique [0002] Materials such as tungsten oxide and molybdenum oxide are new transition metal oxide materials with unique physical properties, such as photochromism, electrochromism, gas sensitivity, etc. Therefore, transition metal molybdenum oxide can be used in various Sensors, electronic devices and other fields. Due to its excellent properties, its research, development and utilization have attracted much attention. The particle size and aggregate structure of materials can often regulate the properties of materials. Compared with bulk raw materials, molybdenum oxide quantum dots have novel optical properties, good water dispersibility, excelle...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G39/02C01G41/02C09K11/68B82Y20/00B82Y40/00
CPCC01G39/02C01G41/02C09K11/681B82Y20/00B82Y40/00C01P2004/04C01P2002/72Y02E60/36
Inventor 沈艳飞杨二利潘登
Owner SOUTHEAST UNIV
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