Preparation method for catalyst efficiently catalyzing hydrogenation reduction of 4-nitrophenol

A technology of p-nitrophenol and catalyst, applied in the field of cobalt selenide nanocomposite materials, can solve the problems of restricting the wide application of composite materials, not suitable for industrial production and use, and not suitable for industrial production, and achieve good potential application value and good repeatability Exploitable, easy-to-control effects

Inactive Publication Date: 2015-03-04
ANHUI UNIVERSITY
View PDF3 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Such as the above examples, many of the reported composite materials that can catalyze the reduction of p-nitrophenol have the participation of noble metals. This is because of the unique chemical properties of noble metals, and the materials obtained by compounding them often have better results, but noble metals The use of its composite materials limits its wide application, so it is not suitable for industrial production
Non-integer ratio cobalt selenide (Co 0.85 Se), as a stable hexagonal material, was first reported by us in the Netherlands "Applied Catalysis, Series B" (Applied Catalysis B: Environmental, 2012, Volume 119-120, Page 139-145), through The one-step hydrothermally synthesized material has a graphene-like structure with a thickness of no more than 10 nanometers; graphene, as a material with excellent physical and chemical properties, is widely used in the preparation of composite materials, but the current method for preparing graphene It is still relatively complicated, still in the stage of laboratory synthesis, and not suitable for industrial production

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method for catalyst efficiently catalyzing hydrogenation reduction of 4-nitrophenol
  • Preparation method for catalyst efficiently catalyzing hydrogenation reduction of 4-nitrophenol
  • Preparation method for catalyst efficiently catalyzing hydrogenation reduction of 4-nitrophenol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1: Preparation of Titanium Dioxide-Loaded Cobalt Selenide Nanocomposite:

[0031] ① Prepare Co according to the technical scheme reported in Experimental detail of Applied Catalysis B: Environmental 2012, 119-120, 139-145 0.85 Se, the specific steps are: weigh 0.5 mmol Co(NO 3 ) 2 ·6H 2 O and 0.5 mmol Na 2 SeO 3 , add 18 ml of distilled water, then slowly dropwise add 2 ml of 85% hydrazine hydrate aqueous solution under the condition of magnetic stirring, continue stirring for 20 minutes and transfer the resulting solution to a 25 ml high-pressure reactor, at 140 degrees Celsius After standing for 24 hours, it was taken out, and after being naturally cooled to room temperature, the obtained product was washed alternately with ethanol and distilled water three times, and dried in an oven at 60 degrees Celsius for 6 hours to obtain cobalt selenide nanosheets.

[0032] ②Aspirate 25 μl of n-tetrabutyl titanate (TBOT) with a pipette, inject 20 ml of anhydrous et...

Embodiment 2

[0039] Example 2: Catalytic reduction of p-nitrophenol:

[0040] Mix 2 ml of distilled water, 0.1 ml of 5.0 × 10 -3 The p-nitrophenol aqueous solution of M was added to the quartz cuvette in turn, and an absorption peak was measured at 317 nm with an ultraviolet-visible spectrophotometer; There is an absorption peak at 400 nm for measurement by UV-visible spectrophotometer, and the concentration corresponding to this absorption peak is set as the initial concentration; finally, 1 mg of titanium dioxide-loaded cobalt selenide nanocomposite is added, and UV-visible nanocomposites are added every 1 minute. Spectrophotometer measurements were taken until the peak around 400 nm no longer changed significantly.

[0041] The catalytic properties of the samples for p-nitrophenol were tested using a Shimadzu UV-3600 UV spectrophotometer.

[0042] Figure 7 , Figure 8 For the ultraviolet-visible absorption curve of the composite material at room temperature for the reduction of cat...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
particle diameteraaaaaaaaaa
Login to view more

Abstract

The invention discloses a preparation method for a catalyst efficiently catalyzing hydrogenation reduction of 4-nitrophenol, and belongs to the technical field of nanometer material preparation and application. Employed graphene-shaped non-integer-ratio cobaltous selenide (Co[0.85]Se) has the thickness not larger than 10 nanometer, and titanium dioxide supported by the cobaltous selenide (Co[0.85]Se) has the particle size of about 10 nanometer. The catalyst is large in specific surface area, has high catalytic efficiency on hydrogenation reduction of 4-nitrophenol, does not employ noble metals and is low in cost. The preparation method is simple, easy to operate, free of organic templates and surfactants, and suitable for industrial production. The prepared titanium dioxide / cobaltous selenide (Co[0.85]Se) is pure in phase, large in specific surface area, good in catalytic reduction effect on 4-nitrophenol and high in repeated utilization value, and has potential utilization value on the aspect of sewage processing.

Description

Technical field: [0001] The invention belongs to the technical field of nanomaterial preparation and application, in particular to the preparation of a titanium dioxide-loaded cobalt selenide nanocomposite material by a hydrothermal method, and the material has the property of efficiently catalyzing and reducing p-nitrophenol. Background technique: [0002] Titanium dioxide (TiO 2 ), as one of the most common catalysts, has been used in air purification, sterilization and sewage treatment. However, due to the shortcomings of titanium dioxide itself, such as wide band gap and easy recombination of electron-hole pairs, the catalytic activity of single titanium dioxide is often limited. Due to the existence of different electron energy levels in the composite material, the driving force of charge separation can be provided by the electric field generated by it, avoiding the recombination of electron-hole pairs, and related studies have been reported. For example, the composit...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/057B82Y30/00B82Y40/00C07C213/02C07C215/76C02F1/70C02F1/58
CPCY02W10/37
Inventor 宋吉明左永张胜义牛和林毛昌杰沈玉华
Owner ANHUI UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap