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Production method and application of molybdenum disulfide quantum dot/titanium dioxide nanosheet compound photocatalyst

A nanosheet and catalyst technology, applied in the field of photocatalytic material preparation, can solve problems such as high price

Pending Publication Date: 2019-08-16
QUANZHOU NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most co-catalysts are still based on noble metals, but their high price is prohibitive, which limits their application.

Method used

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  • Production method and application of molybdenum disulfide quantum dot/titanium dioxide nanosheet compound photocatalyst
  • Production method and application of molybdenum disulfide quantum dot/titanium dioxide nanosheet compound photocatalyst
  • Production method and application of molybdenum disulfide quantum dot/titanium dioxide nanosheet compound photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Two-dimensional (001) TiO 2 Preparation of nanosheets

[0023] Add 0.07 mol of tetrabutyl titanate and 3.525 mL of hydrofluoric acid (40 wt%, 0.07 mol) into a 100 mL reaction vessel, continue stirring for one hour, then place the reaction vessel in an oven and keep it at 180 ℃ for continuous React for 24 hours; after the reaction is over, wash with ethanol and then with deionized water, and then place it in an oven at 60 ℃ to dry for 12 hours to obtain (001) TiO 2 Nanosheet, sample number is 1.

Embodiment 2

[0025] 1) Two-dimensional (001) TiO 2 Preparation of nanosheets

[0026] Add 0.07 mol of tetrabutyl titanate and 3.525 mL of hydrofluoric acid (40 wt%, 0.07 mol) into a 100 mL reaction vessel, continue stirring for one hour, then place the reaction vessel in an oven and keep it at 180 ℃ for continuous React for 24 hours; after the reaction is over, wash with ethanol and then with deionized water, and then place it in an oven at 60 ℃ to dry for 12 hours to obtain (001) TiO 2 Nanosheets.

[0027] 2) MoS 2 Preparation of quantum dots

[0028] 1mmol (NH 4 ) 6 Mo 7 O 24 ·4H 2 O (ammonium molybdate) and 30 mmol thiourea were added to 40 mL of deionized water and kept stirring for 1 h, then the uniformly mixed solution was transferred to a 50 mL reactor and placed in an oven at 200 ℃ to react for 20 h. After the reaction is over, it is centrifuged and then dried in vacuum to obtain MoS 2 ; Weigh 1 g of MoS prepared above 2 , Dispersed in 100ml DMF, ultrasonic treatment for 30 min, then tra...

Embodiment 3

[0032] 1) MoS 2 Preparation of quantum dots

[0033] 1mmol (NH 4 ) 6 Mo 7 O 24 ·4H 2 O (ammonium molybdate) and 30 mmol thiourea were added to 40 mL of deionized water and kept stirring for 1 h, then the uniformly mixed solution was transferred to a 50 mL reactor and placed in an oven at 200 ℃ to react for 20 h. After the reaction is over, it is centrifuged and then dried in vacuum to obtain MoS 2 ; Weigh 1 g of MoS prepared above 2 , Dispersed in 100ml DMF, ultrasonic treatment for 30 min, then transferred to a 250ml round bottom flask, reacted for 6 h under 140 ℃ oil bath conditions, after the reaction, suction filtration, the yellow solution after suction filtration is MoS 2 Quantum dot solution;

[0034] 2) MoS 2 QDs / (101)TiO 2 Preparation of nanosheet composite

[0035] MoS 2 QDs and commercial TiO 2 Prepared by electrostatic self-assembly, that is, 0.7g (101)TiO 2 Disperse in deionized water, then add 8mL MoS 2 Quantum dot solution, stirring continuously for 24 hours, centrifug...

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Abstract

The invention discloses a production method of a MoS2 QDs / (001)TiO2 nanosheet compound photocatalyst of a two-dimensional structure and application of the MoS2 QDs / (001)TiO2 nanosheet compound photocatalyst of the two-dimensional structure. According to the compound photocatalyst, a hydrothermal synthesis method is used for producing two-dimensional (001)TiO2 nanosheets and MoS2 quantum dots, andthen through a self-assembly method, the MoS2 quantum dots are introduced into the two-dimensional (001)TiO2 nanosheets, so that the MoS2 QDs / (001)TiO2 nanosheet compound photocatalyst of the two-dimensional structure is built. The obtained compound photocatalyst shows excellent performance of degrading an organic pollutant rhodamine B (RhB) under the action of simulated sunlight, and the production method of the compound photocatalyst is simple, easy to operate and suitable for application and popularization.

Description

Technical field [0001] The invention belongs to the technical field of photocatalytic material preparation, and specifically relates to a MoS 2 QDs / (001)TiO 2 Preparation method and application of nanosheet composite photocatalyst. Background technique [0002] Energy and environmental issues are two major issues that people all over the world urgently need to solve. Nowadays, semiconductor photocatalysis technology is considered to be one of the most promising technologies for solving energy and environmental crises. Semiconductor photocatalysis technology mainly uses solar energy to convert into chemical energy. The main reactions involved are photocatalytic decomposition of water to produce hydrogen and oxygen, reduction of greenhouse gas carbon dioxide and decomposition of organic pollutants. It is a green, safe and pollution-free technology. Semiconductor TiO was first discovered since 1972 2 Since the single-crystal photoelectrode decomposes water into hydrogen and oxygen ...

Claims

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Application Information

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IPC IPC(8): B01J27/051C02F1/30C02F101/38
CPCB01J27/051C02F1/30C02F2101/38C02F2305/10B01J35/39
Inventor 庄华强刘晓彬徐文涛卓东贤吴平辉
Owner QUANZHOU NORMAL UNIV
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