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Preparation method of carbon-dot-assisted Zn-AgIn5S8/Co9S8 quantum dot and application of carbon-dot-assisted Zn-AgIn5S8/Co9S8 quantum dot in photohydrolysis hydrogen production

A technology of zn-agin5s8, quantum dots, applied in the direction of catalyst activation/preparation, chemical instruments and methods, nanotechnology for materials and surface science, etc., can solve the problems of limited photocatalytic performance, agglomeration and poor stability

Active Publication Date: 2021-09-10
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, traditional I-III-VI-based quantum dot photocatalysts limit their photocatalytic performance due to easy agglomeration and poor stability.

Method used

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  • Preparation method of carbon-dot-assisted Zn-AgIn5S8/Co9S8 quantum dot and application of carbon-dot-assisted Zn-AgIn5S8/Co9S8 quantum dot in photohydrolysis hydrogen production
  • Preparation method of carbon-dot-assisted Zn-AgIn5S8/Co9S8 quantum dot and application of carbon-dot-assisted Zn-AgIn5S8/Co9S8 quantum dot in photohydrolysis hydrogen production
  • Preparation method of carbon-dot-assisted Zn-AgIn5S8/Co9S8 quantum dot and application of carbon-dot-assisted Zn-AgIn5S8/Co9S8 quantum dot in photohydrolysis hydrogen production

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A carbon dot assisted Zn-AgIn 5 S 8 / Co 9 S 8 (ZAIS / Co 9 S 8 / CDs) preparation method of quantum dots, comprising the following steps:

[0025] (1) Add 50 mg ZAIS / Co 9 S 8 Dissolve the nanocomposite in 20 mL deionized water, add a certain amount (0.5-4.5 mg) of carbon dot solution and stir for 1 h until the solution is evenly dispersed;

[0026] (2) The mixed solution was kept at 110 °C for 4 h, washed three times with ethanol / water to prepare ZAIS / Co 9 S 8 / CDs are kept in water.

[0027] The prepared ZAIS / Co 9 S 8 / CDs, the maximum hydrogen production rate is 3.64 mmol g -1 h -1 .

[0028] Among them, the ZAIS / Co 9 S 8 Preparation of nanocomposites: 0.1 g Zn-AgIn 5 S 8 Quantum dots were dissolved in 15 mL deionized water, and a certain amount (1–16 mL) of Co at a concentration of 1 mg / mL was added. 9 S 8 solution and stirred until evenly dispersed, then freeze-dried at -30°C for 36 h to obtain ZAIS / Co 9 S 8 nanocomposites.

[0029] The Zn-AgIn ...

Embodiment 2

[0038] A carbon dot assisted Zn-AgIn 5 S 8 / Co 9 S 8 (ZAIS / Co 9 S 8 / CDs) preparation method of quantum dots, comprising the following steps:

[0039] (1) Add 50 mg ZAIS / Co 9 S 8 The nanocomposite was dissolved in 20 mL of deionized water, and 0.5 mg of carbon dot solution was added and stirred for 1 h until the solution was uniformly dispersed;

[0040] (2) The mixed solution was kept at 110 °C for 4 h, washed three times with ethanol / water to prepare ZAIS / Co 9 S 8 / CDs are kept in water.

[0041] The prepared ZAIS / Co 9 S 8 / CDs, the maximum hydrogen production rate is 2.9 mmol g -1 h -1 .

Embodiment 3

[0043] A carbon dot assisted Zn-AgIn 5 S 8 / Co 9 S 8 (ZAIS / Co 9 S 8 / CDs) preparation method of quantum dots, comprising the following steps:

[0044] (1) Add 50 mg ZAIS / Co 9 S 8 The nanocomposite was dissolved in 20 mL of deionized water, and 2 mg of carbon dot solution was added and stirred for 1 h until the solution was uniformly dispersed;

[0045] (2) The mixed solution was kept at 180 °C for 6 h, washed three times with ethanol / water to prepare ZAIS / Co 9 S 8 / CDs are kept in water.

[0046] The prepared ZAIS / Co 9 S 8 / CDs, the maximum hydrogen production rate is 3.06 mmol g -1 h -1 .

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Abstract

The invention belongs to the technical field of nano composite materials and environment, and relates to a photocatalyst, in particular to a preparation method of carbon dot-assisted Zn-AgIn5S8 / Co9S8 (ZAIS / Co9S8 / CDs) quantum dots, which comprises the following steps: dissolving a ZAIS / Co9S8 nano composite material in deionized water, adding carbon dots, uniformly stirring, placing in a reaction kettle at 110-180 DEG C, carrying out hydrothermal reaction for 4-10 hours, reacting for 4 hours preferably at 110 DEG C, cooling to room temperature, sequentially washing with ethanol and water for three times, and drying to obtain the carbon-dot-assisted Zn-AgIn5S8 / Co9S8 quantum dot. The solid-to-liquid ratio of the ZAIS / Co9S8 to the carbon dots to the deionized water is (10-100) mg: (0.1-10) mg: (5-50) mL. The prepared catalyst is applied to photohydrolysis hydrogen production. Zero-dimensional Zn-AgIn5S8 quantum dots and carbon dots are modified on the surface of a 3D hollow Co9S8 nanotube step by step to construct a ZAIS / Co9S8 / CDs heterojunction photocatalyst so as to enhance visible light hydrogen evolution. The preparation process is simple, low in cost, easy to obtain and short in reaction time, solar energy is converted into clean energy, energy consumption and reaction cost are reduced, batch production is facilitated, and the catalyst is non-toxic and harmless and meets the requirement of sustainable development.

Description

technical field [0001] The invention belongs to the field of nanocomposite materials and environmental technology, and relates to photocatalysts, in particular to a carbon point assisted Zn-AgIn 5 S 8 / Co 9 S 8 (ZAIS / Co 9 S 8 / CDs) quantum dot preparation method and its application to hydrogen production by photohydrolysis. Background technique [0002] Hydrogen energy, as a clean and renewable energy source, has the advantages of being green and non-polluting in solving the energy environment, and has attracted widespread attention. Photo-splitting water technology can convert solar energy into hydrogen, which is an ideal way to effectively use and store solar energy. In order to make better use of 43% of the visible light in the solar spectrum, research on narrow bandgap materials that respond to visible light has attracted widespread attention. Among them, I-III-VI group sulfide quantum dots are widely used in the field of photocatalysis due to their unique charact...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/043B01J37/10C09K11/62B82Y20/00B82Y30/00B82Y40/00C01B3/04
CPCB01J27/043B01J37/10C09K11/623B82Y20/00B82Y30/00B82Y40/00C01B3/042B01J35/39Y02P20/133Y02E60/36
Inventor 张栋琪毛宝东陈启涛张东旭姜天尧周春星邓邦亚刘艳红
Owner JIANGSU UNIV