Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for preparing anatase porous TiO2 spheres, core-shell structure and hollow spheres

A core-shell structure, anatase technology, applied in the field of photocatalytic materials, to achieve the effect of easy control, controllable shape, and simple control method

Inactive Publication Date: 2014-07-23
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
View PDF4 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This limits and hinders the development and industrial application of this template-free preparation method

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
  • Method for preparing anatase porous TiO2 spheres, core-shell structure and hollow spheres
  • Method for preparing anatase porous TiO2 spheres, core-shell structure and hollow spheres
  • Method for preparing anatase porous TiO2 spheres, core-shell structure and hollow spheres

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] At room temperature, under the action of magnetic stirring, 2.0g (8mmol) Ti(SO 4 ) 2 Dissolve in deionized water to form a 60mL solution, add a certain amount of commercial analytical pure HNO to it 3 And dilute to 80mL with deionized water, so that the HNO 3 with Ti(SO 4 ) 2 The molar concentration ratio is 2:1. The above mixed solution was introduced into a polytetrafluoroethylene-lined reaction kettle with a capacity of 100 mL, and kept at 140° C. for 48 hours to obtain a deposit. Then, the resulting sediment was washed with deionized water to neutral pH and dried at 90 °C to obtain TiO 2 Powder, the sample is marked as A.

[0048] The surface morphology and structural characteristics of the sample were observed by using a S-4800 scanning electron microscope from Hitachi, Japan and a 2100 transmission electron microscope from JEOL. The results are as follows: figure 1 (a) and figure 1 As shown in (b), the results show that the obtained TiO 2 It is a solid ...

Embodiment 2

[0052] At room temperature, under the action of magnetic stirring, 1.0g (4mmol) Ti(SO 4 ) 2 Dissolve in deionized water to form a 60mL solution, add a certain amount of commercial analytical pure HNO to it 3 And dilute to 80mL with deionized water, so that the HNO 3 with Ti(SO 4 ) 2 The molar concentration ratio was 30:1. The above mixed solution was introduced into a polytetrafluoroethylene-lined reaction kettle with a capacity of 100 mL, and kept at 180° C. for 2 hours to obtain a deposit. Then, the resulting sediment was washed with deionized water to neutral pH, and dried at 90 °C to obtain TiO 2 Powder, the sample is marked as B.

[0053] The surface morphology and structural characteristics of the sample: such as figure 2 (a) and (b) are the SEM and TEM images of sample B, respectively, and the obtained TiO 2 It is a core-shell structure, the shell is relatively thin, and the core is relatively large. The XRD analysis results show that all the diffraction peaks...

Embodiment 3

[0055] The difference from the preparation method of Example 2 is that the holding time is 5 hours, and the obtained sample is marked as C.

[0056] The surface morphology and structural characteristics of the sample: such as figure 2 (c) and (d) are the SEM and TEM images of sample C, respectively, and the obtained TiO 2 It is also a core-shell structure, and the difference from sample B obtained in Example 2 is that the shell is relatively thick and the core is relatively small. The size range of the core-shell structure of samples B and C is between 0.5-2 μm. The XRD analysis results show that all the diffraction peaks of the obtained samples belong to the anatase phase, and the grain size of the samples calculated by the Scherrer formula is shown in Table 1. The specific surface area and pore volume data of the samples are shown in Table 1.

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
sizeaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the field of photocatalytic materials, specifically a method for preparing anatase porous TiO2 core-shell structure and hollow spheres, specifically dissolving titanium salt in water, adding HNO3 solution, and reacting at a constant temperature in a reactor to obtain a precipitate ; Wash with deionized water until the pH is neutral, and dry to obtain TiO2 powder; through the present invention, HNO3 is used instead of HF as a corrosive agent, which is a fluorine-free preparation process, and solid spheres, core-shell structures and hollow spheres can be prepared by controlling the reaction conditions TiO2 greatly reduces the risk of the preparation process and improves the operability, making the method suitable for large-scale production and industrial application, and has a good application prospect.

Description

technical field [0001] The invention belongs to the field of photocatalytic materials, in particular to a method for preparing anatase porous titanium oxide core-shell structure and hollow spheres. Background technique [0002] TiO 2 It is a photocatalytic material that has been widely studied and applied. It is non-toxic, harmless, and has very stable chemical properties. It has very good application prospects in the fields of photocatalytic degradation of organic matter, photocatalytic sterilization, water splitting to hydrogen production, and dye-sensitized solar cells. TiO 2 The morphology and structure are important factors affecting its photocatalytic performance. Among many different shapes and structures, the hollow sphere and core-shell structure are due to their unique properties (such as: low density, high surface / volume ratio, good Permeability, high light-harvesting ability) has attracted much attention. [0003] Common methods for preparing hollow structur...

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 Patents(China)
IPC IPC(8): C01G23/053B01J21/06
Inventor 刘扬李琦高世安尚建库
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com