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

Method for synthesizing meso-porous TiO2 by cellulose template in ionic liquid / water medium

An ionic liquid, water medium technology, applied in the direction of titanium oxide/hydroxide, bulk chemical production, titanium dioxide, etc., can solve the problems of unsatisfactory material performance, large environmental pollution, harsh synthesis conditions, etc., to improve the living environment and physical and mental health, reducing pollution emissions, and structurally controllable effects

Inactive Publication Date: 2011-06-01
FUJIAN AGRI & FORESTRY UNIV
View PDF4 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its synthesis conditions are also relatively harsh, causing great environmental pollution, and the properties of the prepared materials are not ideal.

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A Cellulose Template Synthesis of Mesoporous TiO in Ionic Liquid / Aqueous Medium 2 The specific steps of the method are:

[0031] a) Weigh 1.0 g of methylcellulose and 100 mL of ionic liquid / water mixed solvent, wherein the volume ratio of ionic liquid to water is: 8:1;

[0032] b) adding hydrochloric acid to adjust the pH of the solution to 3;

[0033] c) Add 5mL of TiCl dropwise under stirring 4 , react for 20min;

[0034] d) Warm up to 70°C, and use NH 4 OH adjusted the pH value of the solution to neutral, and reacted for 30 minutes;

[0035] e) aging the reaction material obtained in step d) for 8 hours, washing it twice with water, and then washing it once with ethanol; drying the washed material at 100° C., and grinding it;

[0036] f) The ground material is heated to 450°C at a rate of 10°C / min in an air atmosphere, kept for 2 hours, and naturally cooled to room temperature to obtain the mesoporous TiO 2 .

[0037] The ionic liquid is 1-butyl-3-methylimidaz...

Embodiment 2

[0039] A Cellulose Template Synthesis of Mesoporous TiO in Ionic Liquid / Aqueous Medium 2 The specific steps of the method are:

[0040] a) Weigh 8.0g of methylcellulose and 300mL of ionic liquid / water mixed solvent, the volume ratio of ionic liquid to water is: 3:1;

[0041] b) adding hydrochloric acid to adjust the pH of the solution to 5;

[0042] c) Add 15mL of TiCl dropwise under stirring 4 , react for 40min;

[0043] d) Warm up to 90°C, and use NH 4 OH adjusted the pH value of the solution to neutral, and reacted for 60 minutes;

[0044] e) Aging the reaction material obtained in step d) for 15 hours, washing it with water for 4 times, and then washing it with ethanol for 3 times; drying the cleaned material at 120° C., and grinding it;

[0045] f) The ground material is heated to 550°C at a rate of 10°C / min in an air atmosphere, kept for 2 hours, and naturally cooled to room temperature to obtain the mesoporous TiO 2 .

[0046] The ionic liquid is a mixed solution...

Embodiment 3

[0048] A Cellulose Template Synthesis of Mesoporous TiO in Ionic Liquid / Aqueous Medium 2 The specific steps of the method are:

[0049] a) Take by weighing 5.0g methylcellulose and 200mL of ionic liquid / water mixed solvent, the volume ratio of ionic liquid and water is: 5: 1;

[0050] b) adding hydrochloric acid to adjust the pH of the solution to 4;

[0051] c) Add 10 mL of TiCl dropwise under stirring 4 , react for 30min;

[0052] d) Warm up to 80°C, and use NH 4 OH adjusted the pH value of the solution to neutral, and reacted for 40 minutes;

[0053] e) Aging the reaction material obtained in step d) for 10 h, washing it with water for 3 times, and then washing it with ethanol for 2 times; drying the cleaned material at 110° C., and grinding it;

[0054] f) The ground material is heated to 750°C at a rate of 10°C / min in an air atmosphere, kept for 2 hours, and naturally cooled to room temperature to obtain the mesoporous TiO 2 .

[0055] The ionic liquid is 1-methyl-...

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

No PUM Login to View More

Abstract

The invention relates to a method for synthesizing meso-porous TiO2 by cellulose templates in an ionic liquid / water medium. According to the method, renewable resource cellulose is used as a template agent; green ionic liquid / water is used as a mixed solvent; titanium tetrachloride is used as a titanium source; a TiO2 / cellulose composite precursor is prepared by liquid-phase hydrolysis; and a meso-porous TiO2 photocatalyst is prepared by temperature programmed roasting process in air atmosphere. The material has higher UV catalytic activity than traditional TiO2 catalysts, and has good specific surface area and a good pore structure, and the porosity is adjustable and controllable. The successful development of the method provides a novel platform for the synthesis of meso-porous materials, and has certain theoretical and practical significance for the reduction of pollution discharge, the development of the application field of ionic liquid and TiO2, and the improvement of human living environment and physical and mental health.

Description

technical field [0001] The present invention specifically relates to a kind of cellulose template synthesis mesoporous TiO in ionic liquid / aqueous medium 2 Methods. Background technique [0002] Since 1995, the improved sol-gel method was used to synthesize mesoporous TiO 2 Since, mesoporous TiO 2 Due to its large specific surface area and pore volume, adjustable pore size, and modifiable surface properties, it has attracted extensive attention from researchers in the fields of heterogeneous catalysis, adsorption separation, and advanced inorganic materials. [0003] Most of the traditional methods for preparing mesoporous materials use various organic solvents and templates (surfactants, block copolymers, non-surfactant organic small molecules, microemulsion droplets and colloidal crystals formed by polymer microspheres, etc. templating agent). The synthesis conditions are relatively harsh, and the environmental pollution is relatively large, and the properties of the p...

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): C01G23/053
CPCY02P20/54
Inventor 陈孝云陈星陆东芳林金春
Owner FUJIAN AGRI & FORESTRY UNIV