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A preparation method of oxygen-deficient oxidized VIB group element quantum dots and the prepared quantum dots and applications thereof

A technology of group elements and oxygen defects, applied in the field of oxygen-deficient oxide VIB group element quantum dots and their preparation, can solve the problem of few synthesis methods of tungsten oxide and molybdenum oxide quantum dots, harsh synthesis conditions, and difficulty in mass production of VIB group element quantum dots and other problems, to achieve the effects of excellent performance, simple preparation process and novel synthesis method

Active Publication Date: 2022-06-03
SOUTHEAST UNIV
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  • 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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  • A preparation method of oxygen-deficient oxidized VIB group element quantum dots and the prepared quantum dots and applications thereof
  • A preparation method of oxygen-deficient oxidized VIB group element quantum dots and the prepared quantum dots and applications thereof
  • A preparation method of oxygen-deficient oxidized VIB group element quantum dots and the prepared quantum dots and applications thereof

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Embodiment 1

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

[0041] S1. Mix 10 mg of tungsten disulfide powder with 50 mL of dimethylformamide to form a mixed solution; S2. Ultrasonic 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 under conditions for 2 hours to obtain a reflux solution; S4, centrifuge the reflux solution at 1000rpm for 30min 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), comprising the following steps: S1, mixing 20mg tungsten disulfide powder with 50mL dimethylformamide to form a mixed solution; S2, ultrasonicating the mixed solution for 120 minutes under the condition of power 240W to obtain a black solution; S3 , 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 30min to obtain a supernatant; S5, heat the supernatant at 70°C under vacuum conditions For 2 hours, the precipitate was washed with ultrapure water; S6, the precipitate was dried by rotary evaporation at 80°C to obtain an oxygen-deficient tungsten oxide quantum dot solid; S7, the solid was dispersed 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), comprising the following steps: S1, mixing 30mg tungsten disulfide powder with 50mL dimethylformamide to form a mixed solution; S2, superimposing the mixed solution under the condition of power 240W for 160 minutes to obtain a black solution; S3 , reflux the black solution at 140 ° C and 700 rpm stirring for 4 hours to obtain a reflux solution; S4, centrifuge the reflux solution for 30 min at 3000 rpm to obtain a supernatant; S5, heat the supernatant at 60 ° C under vacuum conditions For 3 hours, the precipitate was washed with ultrapure water; S6, the precipitate was dried by rotary evaporation at 60°C to obtain an oxygen-deficient tungsten oxide quantum dot solid; S7, the solid was dispersed in ultrapure water to obtain an oxygen-deficient tungsten oxide quantum dot solution.

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Abstract

The invention provides a method for preparing oxygen-deficient oxidized VIB group element quantum dots and the prepared quantum dots and applications, comprising the following steps: mixing VIB group element sulfide powder with dimethylformamide to form a mixed solution; Ultrasonic the mixed solution to obtain a black solution; stir the black solution to reflux to obtain a reflux solution; centrifuge the reflux solution to obtain the supernatant, heat the supernatant, and wash the precipitate; dry the precipitate to obtain an oxygen-deficient oxidized VIB group element quantum dot solid ; The solid is dispersed in ultrapure water to obtain an oxygen-deficient type oxidation VIB group element quantum dot solution. The preparation method of the oxygen-deficient type oxidized VIB group element quantum dots of the present invention has the advantages of simple preparation process and can be produced in large quantities. The prepared oxygen-deficient type oxidized VIB group element quantum dots are a new type of nanometer material, which can be applied in Photocatalysis, supercapacitors, lithium battery information storage materials and biomedicine.

Description

technical field [0001] The invention belongs to the technical field of preparation of novel nanomaterials, relates to the preparation of tungsten oxide and molybdenum oxide quantum dots, and in particular relates to an oxygen-deficient type VIB group element oxide quantum dot and a preparation method and application thereof. Background technique [0002] Tungsten oxide, molybdenum oxide and other materials are a new type of transition metal oxide material with unique physical properties, such as photochromic, electrochromic, 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 and development and utilization have attracted much attention. The particle size and aggregate structure of materials can often control the properties of materials. Compared with bulk raw materials, molybdenum oxide quantum dots have novel optical properties, good water dis...

Claims

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Application Information

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Patent Type & Authority Patents(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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