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A kind of preparation method of nano-titanium dioxide/molybdenum disulfide composite film

A nano-titanium dioxide, composite material thin film technology, applied in catalyst activation/preparation, chemical instruments and methods, chemical/physical processes, etc., can solve problems such as unfavorable catalyst recovery and reuse, secondary environmental pollution, poor chemical stability, etc. Achieve the effect of improving the photon quantum efficiency and photocatalytic activity, increasing the absorption rate, and reducing the generation of recombination centers

Inactive Publication Date: 2019-02-15
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, molybdenum disulfide nanosheets are mainly composited with titanium dioxide. Since the edge layer of molybdenum disulfide in the molybdenum disulfide nanosheet / titanium dioxide composite material is relatively active, it has high reactivity and poor chemical stability. In the process of pollutant treatment, it is easy to Self-decomposition occurs, resulting in secondary pollution of the environment, and is not conducive to the recovery and reuse of catalysts

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Measure 5ml of titanium isopropoxide and dilute it with 45ml of 2-propanol to obtain solution A. Add solution A dropwise to a mixed solution of 26ml of 2-propanol and 26ml of water and leave it for 12 hours to obtain solution B; mix solution B with 2wt% molybdenum disulfide is mixed in 20 milliliters of 2-propanol aqueous solution with a volume ratio of 1:1, stirred for 5 hours at a speed of 3000r / min to obtain solution C, and then put solution C into the reaction kettle, at 200°C React for 24 hours, wash 3 times with deionized water 3, and dry at 105°C for 24 hours to obtain substance D; add substance D to deionized water, and use 750 watts of ultrasonic to mix uniformly to obtain colloid E; spray colloid E on the roughened A nano-titanium dioxide / molybdenum disulfide composite film is formed on a stainless steel net, wherein the spraying power is 100w, the spraying pressure is 0.6kg / cm2, and the air is dried for 30min. This process is repeated 4 times, and the film thi...

Embodiment 2

[0037] Measure 5ml of titanium isopropoxide and dilute it with 45ml of 2-propanol to obtain solution A. Add solution A dropwise to a mixed solution of 26ml of 2-propanol and 26ml of water and leave it for 12 hours to obtain solution B; mix solution B with 4wt% molybdenum disulfide was mixed in 20ml of 2-propanol aqueous solution with a volume ratio of 1:1, stirred at a speed of 3000r / min for 5h to obtain solution C, and then put solution C into the reactor and reacted at 200°C 24h, wash 3 times with deionized water 3, dry at 105°C for 24h to obtain substance D; add substance D to deionized water, and use 750w ultrasonic to mix uniformly to obtain colloid E; spray colloid E on a roughened stainless steel mesh Form a nano-titanium dioxide / molybdenum disulfide composite film, wherein the spraying power is 100w, the spraying pressure is 0.8kg / cm2, and the air is dried for 30min. This process is repeated 4 times, and the film thickness is 500nm; silver nitrate solution is used as th...

Embodiment 3

[0039]Measure 5ml of titanium isopropoxide and dilute it with 45ml of 2-propanol to obtain solution A. Add solution A dropwise to a mixed solution of 26ml of 2-propanol and 26ml of water and leave it for 12 hours to obtain solution B; mix solution B with Mix 6wt% molybdenum disulfide in 20ml of 2-propanol aqueous solution with a volume ratio of 1:1, stir at a speed of 3000r / min for 5h to obtain solution C, then put solution C into the reactor, and react at 200°C 24h, wash 3 times with deionized water 3, dry at 105°C for 24h to obtain substance D; add substance D to deionized water, and use 750w ultrasonic to mix uniformly to obtain colloid E; spray colloid E on a roughened stainless steel mesh Form a nano-titanium dioxide / molybdenum disulfide composite film, wherein the spraying power is 100w, the spraying pressure is 1.1kg / cm2, and the air is dried for 30min. This process is repeated 4 times, and the film thickness is 500nm; silver nitrate solution is used as the electrochemic...

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Abstract

The invention relates to a preparation method of a nanometer titania / molybdenum disulfide composite film. The preparation method includes: respectively preparing nanometer titania solution and molybdenum disulfide of a spherical structure, subjecting the nanometer titania solution and molybdenum disulfide to polytetrafluoroethylene reaction kettle and ultrasonic treatment to obtain colloid of nanometer titania / molybdenum disulfide composite, spraying the colloid onto a roughened stainless steel wire mesh to form the nanometer titania / molybdenum disulfide composite film, and taking silver nitrate solution as electrochemical deposition electrolyte, the stainless steel wire mesh as a cathode and graphite as an anode to deposit silver nanoparticles onto the nanometer titania / molybdenum disulfide composite film to obtain the nanometer titania / molybdenum disulfide composite with the silver nanoparticles in inverse point array. The prepared nanometer titania / molybdenum disulfide composite film can be widely applied to environmental pollution treatment.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a method for preparing a nano-titanium dioxide / molybdenum disulfide composite film. Background technique [0002] Photocatalytic reactions using semiconductors as catalysts are considered to be a green pollution control technology. Among many semiconductor materials, titanium dioxide is the most potential photocatalyst, but because titanium dioxide is a wide bandgap semiconductor (~3.2eV), it can only absorb 3 ~5% sunlight; at the same time, the photogenerated electrons and holes in titanium dioxide are very easy to recombine, so that the utilization rate of solar energy for titanium dioxide photocatalyst is low. [0003] In view of this, people use many methods to modify titanium dioxide and improve its performance, among which there are three most. , by sol doping (Nakata K, 2009Mater.Lett 631628), metal ion implantation (Zheng S K.2002Vacuum65 155), co-sputte...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/051
CPCB01J27/051B01J35/004B01J35/08B01J37/348
Inventor 梁培曹艳亭吴燕雄白阳舒海波黄杰
Owner CHINA JILIANG UNIV
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