MoO<3-x>/g-C<3>N<4> composite photocatalytic material, and preparation method and application thereof

A composite photocatalysis, g-c3n4 technology, applied in organic compound/hydride/coordination complex catalysts, chemical instruments and methods, physical/chemical process catalysts, etc. Separation of VOCs, reducing the energy utilization of surface water molecules, etc., to achieve the effects of increasing vaporization speed, high photothermal conversion efficiency, and high quantum efficiency

Inactive Publication Date: 2019-09-13
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, natural water bodies can only absorb the near-infrared part of sunlight (wavelength > 1400nm), while about 46% of visible light cannot be absorbed and utilized; and the absorption of sunlight energy by the lower water body reduces the utilization of energy by surface water molecules. As a result, the vaporization efficiency is greatly limited, and at the same time, VOCs will vaporize together with water, and the separation of pure water and VOCs (volatile organic compounds) cannot be achieved only by vaporization

Method used

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  • MoO&lt;3-x&gt;/g-C&lt;3&gt;N&lt;4&gt; composite photocatalytic material, and preparation method and application thereof
  • MoO&lt;3-x&gt;/g-C&lt;3&gt;N&lt;4&gt; composite photocatalytic material, and preparation method and application thereof
  • MoO&lt;3-x&gt;/g-C&lt;3&gt;N&lt;4&gt; composite photocatalytic material, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Preparation of loaded MoO 3-x Composite film:

[0034] Calcinate 10g of ammonium molybdate tetrahydrate at 500°C for 4h, wash and dry to obtain molybdenum trioxide MoO 3 , the 1g MoO 3 Disperse in 30mL of deionized water, add 4g of chitosan to the deionized water, stir for 30min and then ultrasonic for 30min, mix well, transfer the mixture to the reactor and react at 180°C for 8h; after the reaction, filter the reaction solution , to obtain a solid product, the solid product was washed and dried to obtain MoO 3-x ; Hydrophobic modification of cellulose acetate membrane (CA) was carried out with 300 μL fluorosilane, and dried at 80 ° C after modification; 20 mg MoO 3-x Dispersed in water, the MoO was filtered by suction 3-x Loaded on the hydrophobically modified CA, after drying, the loaded MoO 3-x composite film.

Embodiment 2

[0036] Preparation loaded with g-C 3 N 4 Composite film:

[0037] Put 10g of urea in a crucible with a lid, keep it warm in a muffle furnace at 550°C for 3 hours, wash and dry it repeatedly with distilled water to obtain light yellow g-C 3 N 4 ; Hydrophobic modification of cellulose acetate membrane was carried out with 300 μL fluorosilane, and dried at 80 °C after modification; 20 mg g-C 3 N 4 Dispersed in water, the g-C was vacuum filtered 3 N 4 Loaded on the hydrophobically modified CA, after drying, the g-C 3 N 4 composite film.

Embodiment 3

[0039] Preparation of MoO of the present invention 3-x / g -C 3 N 4 Composite photocatalytic materials:

[0040] Calcinate 10g of ammonium molybdate tetrahydrate at 500°C for 4h, wash and dry to obtain molybdenum trioxide MoO 3 , the 1g MoO 3 Disperse in 30mL of deionized water, add 4g of chitosan to the deionized water, stir for 30min and then ultrasonic for 30min, mix well, transfer the mixture to the reactor and react at 180°C for 8h; after the reaction, filter the reaction solution , to obtain a solid product, the solid product was washed and dried to obtain MoO 3-x ;Put 10g of urea in a crucible with a lid, keep it warm in a muffle furnace at 550°C for 3h, wash and dry it repeatedly with distilled water to obtain light yellow g-C 3 N 4 ;

[0041] 0.8g g-C 3 N 4 and 0.04g MoO 3-x Disperse in 50mL of ethanol and sonicate for 2 hours, then evaporate the mixed material at 75°C to remove ethanol by magnetic stirring, and then dry at 100°C for 12 hours to obtain the in...

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Abstract

The invention discloses a MoO<3-x>/g-C<3>N<4> composite photocatalytic material. The composite photocatalytic material is composed of a hydrophobically modified cellulose acetate membrane and a MoO<3-x>/g-C<3>N<4> compound supported on the cellulose acetate membrane, wherein the MoO<3-x>/g-C<3>N<4> compound is formed by connecting MoO<3-x> with g-C<3>N<4> via a Z-type heterojunction. The inventionalso discloses a preparation method for the above MoO<3-x>/g-C<3>N<4> composite photocatalytic material and the application of the composite photocatalytic material to degrading of VOCs in water bodies. The MoO<3-x>/g-C<3>N<4> composite photocatalytic material of the invention has high photothermal conversion efficiency and high quantum efficiency, and can improve the vaporization speed of waterand realize high-efficiency degradation of VOCs; and high-quality and high-efficiency production of clean water is successfully achieved through the synergistic effect of vaporization and degradation.

Description

technical field [0001] The present invention relates to a MoO that can be used to produce clean water 3-x / g -C 3 N 4 Composite photocatalytic materials, also involving the aforementioned MoO 3-x / g -C 3 N 4 The preparation method and application of a composite photocatalytic material belong to the technical field of clean water production. Background technique [0002] With the rapid development of the global economy and society, environmental pollution and its derivative problems have become increasingly prominent. The shortage of clean water caused by water pollution has become one of the most important factors restricting social development. The research and development of efficient clean water production technology has become a hot spot in the world. Traditional clean water production technologies generally include membrane filtration, reverse osmosis, and thermal distillation, etc., which generally have heavy pollution of membranes and their components, complex a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/34C02F1/30C02F101/32
CPCB01J31/34B01J35/004C02F1/30C02F2101/322C02F2305/10
Inventor 杨汉培任飞凡高照李京蔚朱一峰罗启巍邹媛卢柯任魏义婷
Owner HOHAI UNIV
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