Method for preparing porous nano TiO2

A nano-template technology, applied in the field of photocatalytic materials, to achieve the effect of no collapse of pores, no defects on the surface, and no residual specific surface area

Inactive Publication Date: 2012-06-20
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, regarding the preparation of porous nano-TiO by using sublimable compounds as templates 2 The method of semiconductor photocatalyst

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Porous Nano TiO 2 Preparation of semiconductor photocatalyst:

[0022] Tetramethyl titanate: 14.0%

[0023] Tetrabutyl titanate: 15.0%

[0024] Melamine: 0.5%

[0025] Camphor: 2.5%

[0026] Ethanol: 49.0%

[0027] Acetone: 5.0%

[0028] Nitric acid: 1.0%

[0029] Acetic acid: 3.0%

[0030] Deionized water: 10.0%

[0031] Porous Nano TiO 2 Preparation of semiconductor photocatalyst: According to the above mass percentage, mix tetramethyl titanate, tetrabutyl titanate, melamine, camphor, ethanol, acetone, nitric acid and acetic acid, stir until completely dissolved, add deionized water, use frequency Ultrasonic dispersion at 28KHz and power of 1KW for 1h, reaction at 75°C for 10h under stirring, aging at room temperature for 24h to obtain TiO containing sublimation template 2 The sol was distilled under reduced pressure to remove the solvent, dried at 100°C, calcined at 180°C for 2h, 240°C for 2h, 300°C for 2h, 400°C for 3h, and 450°C for 5h, and ground to obta...

Embodiment 2

[0033] Porous Nano TiO 2 Preparation of semiconductor photocatalyst:

[0034] Tetraethyl titanate: 15.0%

[0035] Tetraisopropyl titanate: 7.0%

[0036] Benzoic acid: 1.5%

[0037] Anthracene: 1.5%

[0038] Isopropanol: 40.0%

[0039] Toluene: 18.0%

[0040] Hydrochloric acid: 3.0%

[0041] Formic acid: 2.0%

[0042] Deionized water: 12.0%

[0043] Porous Nano TiO 2 Preparation of semiconductor photocatalyst: According to the above mass percentage, mix tetraethyl titanate, tetraisopropyl titanate, benzoic acid, anthracene, isopropanol, toluene, hydrochloric acid and formic acid, stir until completely dissolved, then add deionized Water, disperse with ultrasonic waves with a frequency of 30KHz and a power of 1.5KW for 0.5h, react at 70°C for 15h under stirring, and age at room temperature for 20h to obtain TiO containing a sublimation template. 2 The sol was distilled under reduced pressure to remove the solvent, dried at 120°C, calcined at 160°C for 1 hour, 250°C for...

Embodiment 3

[0045] Porous Nano TiO 2 Preparation of semiconductor photocatalyst:

[0046] Tetra-n-propyl titanate: 10.0%

[0047] Tetra-n-butyl titanate: 20.0%

[0048] Camphor: 3.5%

[0049] 2-Hydroxybenzoic acid: 1.5%

[0050] Methanol: 5.0%

[0051] Cyclohexanone: 5.0%

[0052] Ethanol: 42.0%

[0053] Chloroacetic acid: 1.0%

[0054] Hydrochloric acid: 3.0%

[0055] Deionized water: 9.0%

[0056] porous nano Ti0 2 Preparation of semiconductor photocatalyst: According to the above mass percentage, tetra-n-propyl titanate, tetra-n-butyl titanate, camphor, 2-hydroxybenzoic acid, methanol, cyclohexanone, ethanol, chloroacetic acid and hydrochloric acid were mixed and stirred until After completely dissolving, add deionized water, disperse for 2 hours with an ultrasonic wave with a frequency of 40KHz and a power of 1.5KW, react at 70°C for 15 hours under stirring, and age at room temperature for 30 hours to obtain TiO containing a sublimation template. 2 The sol was distilled und...

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Abstract

The invention discloses a method for preparing porous nano TiO2. The method includes steps: according to the weight ratio of titanic acid ester, sublimable compound template, organic solvent, acid and deionized water, (0.001%-80%):(0.00001%-50%):(0.001%-95%):(0.001%-90%):(0.001%-95%), mixing the titanic acid ester, the sublimable compound, the organic solvent and the acid till completely dissolved, adding the deionized water, scattering with ultrasonic for 0.1-20 hours, reacting under stirring at 25-85 DEG C for 0.1-50 hours, ageing for 1-48 hours at room temperature to obtain TiO2 sol containing the sublimate template, removing solvent by means of reduced pressure distillation, drying at 60-130 DEG C, roasting at 150-240 DEG C for 0.1-20 hours, roasting at 250-340 DEG C for 0.1-20 hours, roasting at 350-440 DEG C for 0.1-20 hours, roasting at 450 DEG C for 0.1-20 hours, cooling naturally and grinding to obtain porous nano TiO2 solid powder. The porous nano TiO2 solid powder can be applied to photocatalytic hydrogen production by water decomposition, photocatalytic organic pollutant degradation, ultrasonic absorbing materials, textiles, self-cleaning glass, sunscreen cream, paint, printing ink, food packaging materials, paper industry, space industry and lithium batteries and has wide application prospect. The method is simple and feasible in process, low in investment and beneficial to popularization and application.

Description

technical field [0001] The invention relates to a kind of porous nano TiO 2 The preparation method belongs to the field of photocatalytic materials. Background technique [0002] With the acceleration of industrialization and the sharp increase of energy consumption, environmental pollution is becoming more and more serious. In environmental pollution, chemical pollution accounts for 80% to 90% of all kinds of pollution. The main cause of pollution is waste gas, waste water and waste residue discharged from chemical industry production. According to the data released by the National Bureau of Statistics, my country is currently the world's largest emitter of sulfur dioxide and the second largest emitter of carbon dioxide. The discharge of industrial wastewater has also increased significantly, causing 30% of the drinking water sources in key cities to fail to meet Class III standards, 90% of the rivers flowing through the cities are polluted to varying degrees, and the deg...

Claims

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Application Information

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IPC IPC(8): C01G23/053C01G23/08B82Y40/00
Inventor 刘福生李玲方婷朱涛卢南刘恋恋黄华王文韬
Owner NANJING FORESTRY UNIV
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