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Molybdenum diselenide modified titanium dioxide nano photocatalyst and its preparation method and application

A nano-photocatalyst and titanium dioxide technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, separation methods, etc., can solve the problems of less environmentally friendly coatings, etc., achieve high product yield, effectively remove toxic and harmful gases, and cost-effective cheap effect

Active Publication Date: 2022-04-15
ZHENJIANG COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The layered MoSe 2 Nanomaterials have become a hot spot in the field of nanomaterials. Chinese invention patents 201510907556.3, 201810457292X, 201810241753X, etc. have reported their applications in the fields of lubrication and friction, lithium batteries and photocatalysis. However, there are few reports about their applications in environmentally friendly coatings.

Method used

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  • Molybdenum diselenide modified titanium dioxide nano photocatalyst and its preparation method and application
  • Molybdenum diselenide modified titanium dioxide nano photocatalyst and its preparation method and application
  • Molybdenum diselenide modified titanium dioxide nano photocatalyst and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] MoSe 2 / TiO 2 Synthesis of nanophotocatalysts (MoSe 2 content is 5wt%)

[0025] (1) 1.6452g sodium molybdate (Na 2 MoO 4 2H 2 O), 1.5492g selenium (Se) powder, 0.2595g sodium borohydride (NaBH 4 ) was dissolved in 50mL of ethanol aqueous solution (50wt%), magnetically stirred for 30min, then transferred to a 100mL stainless steel reaction kettle, placed in a vacuum oven, kept at 200°C for 6h, and then cooled to room temperature; the prepared black product was transferred to 60 ℃ NaOH solution (50mL, 2mol / L), magnetically stirred for 10min, then transferred to an oven at 80℃ for 2h to remove excess Se, then cooled to room temperature naturally, washed 2-3 times with deionized water and ethanol, respectively, Centrifuge (1600rpm / min), dry in a vacuum oven at 80°C for 24h to obtain MoSe 2 powder.

[0026] (2) According to MoSe 2 In MoSe 2 / TiO 2 In the theoretical value of 5wt%, the MoSe prepared in step (1) 2 Powder 0.02g was dispersed into 50mL of ammonium fl...

Embodiment 2

[0030] MoSe 2 / TiO 2 Synthesis of nanophotocatalysts (MoSe 2 content is 10wt%)

[0031] (1) 1.6452g sodium molybdate (Na 2 MoO 4 2H 2 O), 1.5492g selenium (Se) powder, 0.2595g sodium borohydride (NaBH 4 ) was dissolved in 50mL of ethanol aqueous solution (50wt%), transferred to a 100mL stainless steel reaction kettle after being magnetically stirred for 30min, placed in a vacuum drying oven, kept at 200°C for 6h, and then cooled to room temperature; the prepared black product was transferred to 80 ℃ NaOH solution (50mL, 3mol / ), magnetically stirred for 10min, then transferred to an oven at 80℃ for 2h to remove excess Se, then cooled to room temperature naturally, washed 2-3 times with deionized water and ethanol, and centrifuged Separation (1600rpm / min), drying in a vacuum oven at 80°C for 24h to obtain MoSe 2 powder.

[0032] (2) According to MoSe 2 In MoSe 2 / TiO 2 In the theoretical value of 10wt%, the MoSe prepared in step (1) 2 Powder 0.04g was dispersed into ...

Embodiment 3

[0036] MoSe 2 / TiO 2 Synthesis of nanophotocatalysts (MoSe 2 content is 20wt%)

[0037] (1) 1.6452g sodium molybdate (Na 2 MoO 4 2H 2 O), 1.5492g selenium (Se) powder, 0.2595g sodium borohydride (NaBH 4 ) was dissolved in 50mL of ethanol aqueous solution (50wt%), magnetically stirred for 30min, then transferred to a 100mL stainless steel reaction kettle, placed in a vacuum oven, kept at 200°C for 6h, and then cooled to room temperature; the prepared black product was transferred to NaOH solution (50mL, 2mol / L) at 70°C, magnetically stirred for 10min, then transferred to an oven at 80°C for 2h to remove excess Se, then cooled to room temperature naturally, washed with deionized water and ethanol for 2-3 times respectively , centrifuged (1600rpm / min), and dried in a vacuum oven at 80°C for 24h to obtain MoSe 2 powder.

[0038] (2) According to MoSe 2 In MoSe 2 / TiO 2 In the theoretical value of 20wt%, the MoSe prepared in step (1) 2 Powder 0.08g was dispersed into 50...

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Abstract

The invention relates to molybdenum diselenide modified titanium dioxide nano photocatalyst and its preparation method and application. The particle size of the nano photocatalyst is 100-200nm, and the main component is MoSe 2 with TiO 2 , where MoSe 2 The content is 5‑20wt%. The preparation method of the catalyst is: dissolving soluble molybdenum salt, selenium powder and reducing agent in ethanol aqueous solution, constant temperature hydrothermal reaction and filtering, washing and drying to obtain MoSe 2 powder; disperse the powder in ethanol or aqueous solution of soluble titanium salt, wash and dry after constant temperature hydrothermal reaction to obtain the nano photocatalyst, add it to film forming agent, dispersant, defoamer, whitening agent In the aqueous solution, stir, add stabilizer, leveling agent and antifungal agent, adjust the pH value to 7.0-8.0, and age, to obtain an environmentally friendly coating with formaldehyde degradation ability. The method of the invention has low cost, simple and easy-to-control production process, and is suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to the field of nanometer materials and environmental protection materials, in particular to a molybdenum diselenide modified titanium dioxide nanometer photocatalyst and its preparation method and application. Background technique [0002] Traditional photocatalytic materials represented by titanium dioxide have been widely used in photocatalytic purification of the environment due to their excellent physical and chemical properties, which is one of the important ways to solve the current increasingly serious environmental pollution problems. However, titanium dioxide can only absorb 4% to 5% of the ultraviolet light in the solar spectrum. Therefore, expanding the absorption spectrum of titanium dioxide and improving its photocatalytic efficiency are important research directions in the field of photocatalysis. In addition, traditional photocatalytic materials are also important additives or additives for current environmentally ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/057B01D53/86B01D53/72C09D133/00C09D175/04C09D5/14C09D7/61C09D7/63C09D7/65C09D7/47
CPCB01J27/0573B01J35/004B01J35/0013B01D53/007B01D53/8668C09D133/00C09D5/14C09D7/61C09D7/63C09D7/65C09D7/67C09D7/47B01D2257/704B01D2257/93B01D2258/06B01D2259/802C08K2003/3045C08K2003/2241C08K2201/011C08L2205/035C08L75/04C08L83/04C08L83/12C08K13/02C08K3/30C08K3/22C08K5/42C08K5/138
Inventor 张飞霞唐国钢
Owner ZHENJIANG COLLEGE
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