A kind of tantalum disulfide/titanium dioxide composite material and its preparation method and application

A composite material and electrostatic combination technology, applied in chemical instruments and methods, separation methods, chemical/physical processes, etc., to achieve the effect of less energy consumption and lower energy consumption

Active Publication Date: 2021-08-06
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But most current metal / TiO 2 Photocatalytic materials can only improve their photocatalytic performance by reducing the recombination probability of electron-hole pairs.

Method used

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  • A kind of tantalum disulfide/titanium dioxide composite material and its preparation method and application
  • A kind of tantalum disulfide/titanium dioxide composite material and its preparation method and application
  • A kind of tantalum disulfide/titanium dioxide composite material and its preparation method and application

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preparation example Construction

[0053] TiO 2 Preparation of Particle Dispersions. TiO 2 The particles were dispersed in deionized water to obtain TiO 2 particle dispersion, and use an acidic solution to adjust the pH to 2-5, preferably 3-4, to make the surface positively charged. Among them, TiO 2 The concentration of the particle dispersion is 4-10 mg / ml, preferably 7 mg / ml. The acidic solution can be hydrochloric acid or sulfuric acid.

[0054] TaS adjusted to pH 2-5 2 Add (drop in) an appropriate amount of positively charged TiO with a pH of 2 to 5 into the nanosheet dispersion 2 Particle dispersion, and then under continuous stirring, mix the two evenly, and fully and continuously stir for 20 minutes to obtain a suspension. Among them, the control TaS 2 Nanosheets and TiO 2 The mass ratio of the composite material is (0.005-0.1):1, preferably (0.01-0.04):1. The rate of dripping can be 3~6ml / min, do not add too fast, otherwise TiO 2 Particles are not uniformly dispersed in TaS 2 nanosheet surf...

Embodiment 1

[0063] 1.75 mg of TaS 2 The nanosheets were dispersed in 50ml deionized water for 30 minutes by ultrasonic dispersion to obtain uniform, stable and well-dispersed TaS 2 nanosheet dispersion, and then adjust its pH to about 3 with dilute hydrochloric acid. Similarly, disperse 0.35g of P25 in 50ml of deionized water for ultrasonic dispersion for 30 minutes to obtain uniform, stable and well-dispersed P25 nanoparticles, and then adjust its pH to about 3 with dilute hydrochloric acid. Under the action of magnetic stirring, the P25 nanoparticle dispersion was added dropwise to TaS at a rate of 3-6ml / min. 2 In the nanosheet dispersion, stir for 20 minutes, perform suction filtration, wash three times with deionized water and absolute ethanol, and then place in an oven at 50°C for drying to obtain TaS with uniform and stable morphology 2 / TiO 2 Composite material powder, where TaS 2 The weight ratio of nanosheets is 0.5%. see figure 2 , when the pH is around 3, TaS 2 The surf...

Embodiment 2

[0067] 3.5mg of TaS 2 The nanosheets were dispersed in 50ml deionized water for 30 minutes by ultrasonic dispersion to obtain uniform, stable and well-dispersed TaS 2 nanosheet dispersion, and then adjust its pH to about 3 with dilute hydrochloric acid. Similarly, disperse 0.35g of P25 in 50ml of deionized water for ultrasonic dispersion for 30 minutes to obtain uniform, stable and well-dispersed P25 nanoparticles, and then adjust its pH to about 3 with dilute hydrochloric acid. Under the action of magnetic stirring, the P25 nanoparticle dispersion was added dropwise to TaS at a rate of 3-6ml / min. 2 In the nanosheet dispersion, stir for 20 minutes, perform suction filtration, wash three times with deionized water and absolute ethanol, and then place in an oven at 50°C for drying to obtain TaS 2 / TiO 2 Composite material powder, where TaS 2 The weight ratio of the nanosheets was 1%. see figure 2 , when the pH is around 3, TaS 2 The surface carries a negative charge, whi...

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Abstract

The invention relates to a tantalum disulfide / titanium dioxide composite material and its preparation method and application, the tantalum disulfide / titanium dioxide composite material includes TaS 2 nanosheets, and electrostatically bonded to the TaS 2 TiO on the surface of nanosheets 2 particles, the TaS 2 and TiO 2 The mass ratio of the particles is (0.005-0.1):1, preferably (0.01-0.04):1.

Description

technical field [0001] The invention relates to a tantalum disulfide / titanium dioxide composite material and its preparation method and application, in particular to a TaS 2 / TiO 2 The composite material, its preparation method and its application in gas-phase acetaldehyde degradation belong to the field of photocatalytic material preparation and degradation of gas-phase pollutants. Background technique [0002] Titanium dioxide (TiO 2 ) is widely used in solar cells, photocatalytic hydrogen production, and photocatalytic degradation of organic and inorganic pollutants as an ideal semiconductor material due to its stable physical and chemical properties, chemical and photocorrosion resistance, non-toxicity, and low cost. But although TiO 2 With so many advantages, its photocatalytic efficiency has not been ideal. The photocatalytic performance is mainly affected by three factors: light absorption, electron-hole recombination rate, and adsorption capacity for pollutants. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/04B01D53/86B01D53/72
CPCB01D53/8668B01J27/04B01J35/004
Inventor 孙静曾庆龙谢晓峰王焱王晓陆冠宏饶泽鹏代雪萍
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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