Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation method of titanium dioxide nanosphere

A technology of titanium dioxide and nanospheres, which is applied in the field of nanomaterials, can solve the problems of long reaction time and high energy consumption of nanospheres, and achieve the effects of shortening synthesis time, improving reaction selectivity, and accelerating reaction rate

Inactive Publication Date: 2013-04-17
CHINESE ACAD OF INSPECTION & QUARANTINE
View PDF3 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Preparation of TiO by Conventional Hydrothermal Reaction Method 2 The reaction time of nanospheres is long and consumes a lot of energy, which brings many disadvantages to the actual production and application. 2 The nanosphere approach is of great importance

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 of titanium dioxide nanosphere
  • Preparation method of titanium dioxide nanosphere

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A method for preparing titanium dioxide nanospheres by high-pressure microwave method, the specific steps are as follows:

[0017] 1) Preparation of precursor solution

[0018] In a fume hood, mix 45ml of absolute ethanol with 45ml of deionized water in beaker A (ethanol acts to inhibit TiCl 4 rapid hydrolysis). Place beaker A in an ice-water bath, stir and gradually add TiCl dropwise at the same time 4 Liquid 10ml. Thus configuring 10% TiCl 4 Precursor B.

[0019] 2) Microwave reaction program setting

[0020] A fully automatic microwave reactor (CEM, Explorer, USA) was preheated for 30 minutes, and the temperature control mode was selected, the power was set at 70-90W, the reaction time was 4-30 minutes, and the temperature range was 100-200°C.

[0021] 3) Fully automatic microwave synthesis

[0022] Take different volumes of precursor solution B and dilute to 50ml with deionized water respectively to obtain solutions C with different concentrations. Pour solut...

Embodiment 2

[0026] A method for preparing titanium dioxide nanospheres by high-pressure microwave method, the specific steps are as follows:

[0027] 1) Preparation of precursor solution

[0028] Mix 80% absolute ethanol with 80% deionized water in beaker A in a fume hood. Place beaker A in an ice-water bath, stir and gradually add TiCl dropwise at the same time 4 Liquid, the configuration mass percent content is 10% TiCl 4 Precursor B.

[0029] 2) Microwave reaction program setting

[0030] A fully automatic microwave reactor (CEM, Explorer, USA) was preheated for 30 minutes, and the temperature control mode was selected, the power was set at 70-90W, the reaction time was 4-30 minutes, and the temperature range was 100-200°C.

[0031] 3) Fully automatic microwave synthesis

[0032] Take different volumes of precursor solution B and dilute to 50ml with deionized water respectively to obtain solutions C with different concentrations. Pour solution C into a polytetrafluoroethylene tank...

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
Particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method of a titanium dioxide nanosphere, which comprises the following steps of (1) uniformly mixing dehydrated alcohol and deionized water in an isovolumetric manner, placing in an ice-water bath, stirring and gradually dropwise adding TiCl4 simultaneously, obtaining precursor liquid of TiCl4 with the mass content of 10%, and (2) taking 3mL of precursor liquid in Step (1), adding deionized water to 50mL, reacting at 100-250 DEG C for 4-30min in microwave with power of 70-90W, conducting natural cooling, washing a reaction product by high-speed centrifugation till no Cl anions, conducting centrifugal washing with dehydrated alcohol, and drying in a vacuum drying oven at 60DEG C-80 DEG C to obtain white powder. With the adoption of a microwave heating method, the synthesis time of nanometer TiO2 is shortened greatly; the energy consumption is low; a technology is simple; and a synthesis condition is easy to control. The conventional hydrothermal reaction method for preparing the TiO2 nanosphere is long in reaction time and high in energy consumption, and brings a great number of disadvantages to practical production and application.

Description

technical field [0001] The invention relates to the technical field of nanomaterials, in particular to a method for preparing titanium dioxide nanospheres. Background technique [0002] Nano-titanium dioxide has small particles, large specific surface area, strong magnetism, good photocatalysis and absorption performance, strong ultraviolet absorption ability, high surface activity, good thermal conductivity, good dispersion, and the prepared suspension is stable and harmless to the human body. Therefore, it has broad and potential application prospects in the fields of photocatalysis, air purification, ultraviolet absorbers, high-efficiency photocatalysts, sunscreen skin care cosmetics, solar cells, fine ceramics, and gas sensor components. [0003] Titanium dioxide chemical formula TiO 2 , the molecular weight is 79.9, the melting point is 1830-1850°C, and the boiling point is 2500-3000°C. There are three crystal forms of titanium dioxide in nature: rutile is a tetragona...

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
IPC IPC(8): C01G23/053B82Y30/00
Inventor 慈颖张晓龙王林李金有
Owner CHINESE ACAD OF INSPECTION & QUARANTINE