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MnISCN nanocomposite with high visible-light activity, preparation method and application thereof

A nanocomposite material and visible light technology, applied in chemical instruments and methods, hydrogen production, hydrogen/synthesis gas production, etc., can solve problems such as enhancement and suppression of photocatalytic activity, achieve huge application potential, accelerate transfer and separation, The effect of efficient degradability

Active Publication Date: 2019-01-18
TAIZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, unfortunately, in g-C 3 N 4 The enhancement of the photocatalytic activity of these hybrid systems is still largely inhibited by the rapid recombination of photogenerated holes and electrons during the migration from the bulk to the surface.

Method used

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  • MnISCN nanocomposite with high visible-light activity, preparation method and application thereof
  • MnISCN nanocomposite with high visible-light activity, preparation method and application thereof
  • MnISCN nanocomposite with high visible-light activity, preparation method and application thereof

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Effect test

Embodiment

[0026] Put 5g of dicyandiamide in a porcelain boat, place the porcelain boat in the middle of a tubular atmosphere furnace and heat it to 350°C, stabilize for 10 minutes, then raise the temperature to 550°C, and react at this temperature for 4h. When the temperature drops to room temperature, it is finely ground in a quartz grinding bowl to obtain a blocky g-C with a yellow color. 3 N 4 powder. The block g-C prepared above 3 N 4 Disperse in hot water by ultrasonic, make it fully absorb water for a period of time, then separate and collect the swollen g-C 3 N 4 , And carry out low-temperature freezing treatment, and then heat treatment at 550℃ for 4h to prepare white mesoporous g-C 3 N 4 Nano layer.

[0027] Add a certain amount of the obtained CN nanosheets into deionized water, and form a uniform suspension through ultrasonic treatment for half an hour. Next, manganese chloride tetrahydrate (1 mmol, 0.198 g), indium chloride (2 mmol, 0.442 g) and thiourea (5 mmol, 0.381 g) were ...

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Abstract

The invention discloses an MnISCN nanocomposite with a high visible-light activity and a preparation method thereof. The preparation method comprises the steps of synthesizing a mesoporous g-C3N4 nanosheet without the use of a template by a synergistic approach of frozen expansion and thermal treatment, and then loading a mesoporous g-C3N4 nanolayer structure on the MnIn2S4 nanosheet to prepare MnIn2S4 / g-C3N4 nanocomposite with a high visible-light activity. Compared with individual MnIS nanosheets and mesoporous CN nanosheets, the MnISCN nanocomposite prepared by the invention establishes a close 2D / 2D heterogenous interface between the MnIS nanosheet and CN nanosheet, as a result, the transfer and separation speed of photoelectric charge carriers is effectively improved; the MnISCN nanocomposite has an efficiently photocatalytic degradation capability of pharmaceutical wastewater and an activity of photocracking water to produce hydrogen gas, and this system has great application potential in photocatalytic field.

Description

Technical field [0001] The invention belongs to the technical field of catalyst material preparation, relates to a composite material and a preparation method thereof, and in particular to a MnISCN (ie MnIn) with high visible light activity 2 S 4 / g-C 3 N 4 ) Nanocomposite materials and their preparation methods and applications. Background technique [0002] Since 1972, Professor Fujishima Showa Honda has used TiO 2 Since the pioneering work of successfully realizing water splitting hydrogen production as a photoelectrode through photoelectrochemistry, people have been taking photocatalysis, a new technology based on semiconductor light absorption to convert solar energy into chemical energy, as one of the strategies for controlling environmental pollution and energy production. One. However, although TiO 2 It shows great potential in photocatalytic applications, but due to its weak absorption capacity, it only corresponds to ultraviolet light absorption, which greatly limits Ti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J35/02C01B3/04C02F1/30C02F103/34B01J35/00
CPCC01B3/042C02F1/30B01J27/24C01B2203/0277C01B2203/1041C02F2103/343C02F2305/10B01J35/40B01J35/39Y02E60/36
Inventor 陈伟黄国波常玲
Owner TAIZHOU UNIV
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