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Method for synthesizing molybdenum disulfide by aid of quantum dots

A molybdenum disulfide, quantum dot technology, applied in chemical instruments and methods, chemical/physical processes, special compound water treatment, etc., can solve problems such as environmental damage, human health and even life threats, to improve energy level structure, degradation Effect of rate increase, spectral absorption characteristic change

Inactive Publication Date: 2017-06-13
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The present invention aims to solve the technical problem that volatile organic compounds (VOC) not only cause serious damage to the environment, but also seriously threaten human health and life, and provide a method for the synthesis of molybdenum disulfide assisted by quantum dots

Method used

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  • Method for synthesizing molybdenum disulfide by aid of quantum dots
  • Method for synthesizing molybdenum disulfide by aid of quantum dots

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specific Embodiment approach 1

[0018] Specific embodiment one: the method for the synthesis of molybdenum disulfide assisted by quantum dots in this embodiment is carried out according to the following steps:

[0019] 1. Hydrothermal synthesis of silicon quantum dots:

[0020] Dissolve 0.040g-0.060g of sodium ascorbate in 10ml of deionized water and place it for 20 minutes to obtain a mixed solution. Dissolve 1.25ml of the mixed solution in 1ml of trimethoxysilane, add deionized water to make a concentration of 20g / l solution, and pour the solution into a hydrothermal reactor and heat it to 200°C for 24 hours to obtain silicon quantum dots;

[0021] 2. Silicon quantum dots assisted synthesis of molybdenum disulfide:

[0022] Dissolve 5mmol-7mmol ammonium molybdate and 17mmol-19mmol thiourea in 20ml deionized water, add 0.025mmol purified silicon quantum dots, then pour the mixed mixture into a hydrothermal reaction kettle, and react at 150°C Cool naturally for 12 hours, collect black deposits, wash with e...

specific Embodiment approach 2

[0023] Embodiment 2: This embodiment differs from Embodiment 1 in that in step 1, 0.0594 g of sodium ascorbate is dissolved in 10 ml of deionized water and left for 20 minutes. Others are the same as the first embodiment.

specific Embodiment approach 3

[0024] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that in step two, 5 mmol ammonium molybdate and 17 mmol thiourea are dissolved in 20 ml deionized water. Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention relates to a method for preparing a photocatalyst, in particular to a method for synthesizing molybdenum disulfide by aid of quantum dots. The invention is intended to solve the technical problem that VOCs (volatile organic compounds) cause severe destruction to the environment and poses a great threat on the health and even life of human itself. The method comprises: I, hydrothermally synthesizing silicon quantum dots; II, synthesizing molybdenum disulfide by the aid of the quantum dots. A novel mixture structure is constructed with the silicon quantum dots and the molybdenum disulfide; spectral absorption characteristics of the structure are improved greatly; total spectral absorption reaches 95%, and solar energy can be absorbed effectively; the mixture structure of the silicon quantum dots and molybdenum disulfide brings a great increase in the degrading rate of methyl orange organic dyes. Compared with existing shortest degrading time of 150 min in visible light, the method may increase the gradating time of the silicon quantum dot and molybdenum disulfide structure to 90 min. The method belongs to the field of preparation of photocatalyst.

Description

technical field [0001] The invention relates to a preparation method of a photocatalyst. Background technique [0002] Van der Waals crystals are a class of materials with a layered structure, including graphene, metal oxides, chalcogenides, and phosphates. Their different chemical compositions and crystal structures lead to different properties. For example, there are both conductors and insulator. Although there are differences among the materials, these materials all exhibit a common feature—large van der Waals interlayer spacing and weak interaction force. The interlayer spacing of Van der Waals crystal is about a few nanometers, providing certain reaction conditions, which can overcome the weak interlayer interaction force and reversibly insert some functional molecules, ions and atoms into the interlayer gap to form a layer-like columnar structure. . Among them, graphene, as the most concerned van der Waals material, has been widely used in industries such as pencil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/051C02F1/30C02F1/32C02F101/30
CPCC02F1/30C02F1/32B01J27/051C02F2305/10C02F2101/308B01J35/39Y02W10/37
Inventor 吴金珠刘悦丁璈璐陈旭毅任志恒冯雅秀
Owner HARBIN INST OF TECH
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