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Preparation method for titanium dioxide photocatalyst doped with metal ion

A technology of metal ions and photocatalysts, applied in the field of environmental technology and nanomaterials, can solve problems such as limited application range, complicated preparation equipment, and complicated operation, and achieve the effects of improving photocatalytic activity, expanding absorption range, and enhancing antibacterial effect

Inactive Publication Date: 2010-01-13
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As a photocatalyst, titanium dioxide has a solar energy utilization rate of only about 4%. As an antibacterial material, it can only function under light conditions, so its application range is limited.
Among them, the preparation equipment of the CVD method is complicated, consumes a lot of energy, and the cost is high; the hydrothermal synthesis method, the sol-gel method and the precipitation method in the liquid phase method also have the disadvantages of complicated operation and long preparation cycle.
Preparation of TiO Doped with Metal Ions by Homogeneous Thermal Hydrolysis 2 rarely reported

Method used

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  • Preparation method for titanium dioxide photocatalyst doped with metal ion

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1: At first, preparation concentration is the HNO of 1mol / L 3 solution, take 20ml of HNO 3 solution and add 0.0025g of AgNO to it 3 Obtain solution A; Next, place solution A on a magnetic stirrer and heat and stir, and when the solution is volatilized to 15ml, add 0.7ml of chemically pure tetra-n-butyl titanate (C 16 h 36 o 4 Ti) was dissolved in solution A, continued heating and stirring until Ag ion-doped TiO 2 crystal; finally, TiO was doped with Ag ions 2 The crystal is ground in a mortar, then sintered in a muffle furnace at 200°C for 2 hours, cooled naturally in the furnace, ground again in a mortar, and the obtained powder is placed in a muffle furnace and sintered at 550°C After 3 hours, the furnace was naturally cooled to room temperature to obtain an Ag ion-doped titania photocatalyst with an Ag doping mass of 1%. see figure 1 , the results show that the obtained sample is a mixed crystal of anatase and rutile crystals mainly composed of anat...

Embodiment 2

[0015] Embodiment 2: At first, preparation concentration is the HNO of 1.2mol / L 3 solution, take 20ml of HNO 3 solution and added 0.0072g of Fe(NO 3 ) 3 Obtain solution A; Next, place solution A on a magnetic stirrer and heat and stir, and when the solution is volatilized to 15ml, add 0.7ml of chemically pure tetra-n-butyl titanate (C 16 h 36 o 4 Ti) was dissolved in solution A, continued heating and stirring until Fe ion-doped TiO 2 crystal; finally, Fe ions doped TiO 2 The crystal is ground in a mortar, then sintered in a muffle furnace at 200°C for 2 hours, cooled naturally in the furnace, ground again in a mortar, and the obtained powder is placed in a muffle furnace and sintered at 550°C After 3 hours, the furnace was naturally cooled to room temperature to obtain a Fe ion-doped titania photocatalyst with a Fe doping mass of 1%-.

Embodiment 3

[0016] Embodiment 3: at first, preparation concentration is the HNO of 1.4mol / L 3 solution, take 20ml of HNO 3 solution and added 0.0049g of Cu(NO 3 ) 2 Obtain solution A; Next, place solution A on a magnetic stirrer and heat and stir, and when the solution is volatilized to 15ml, add 0.7ml of chemically pure tetra-n-butyl titanate (C 16 h 36 o 4 Ti) was dissolved in solution A, continued heating and stirring until Cu ion-doped TiO 2 crystal; finally, Cu ions doped TiO 2 The crystal is ground in a mortar, then sintered in a muffle furnace at 200°C for 2 hours, cooled naturally in the furnace, ground again in a mortar, and the obtained powder is placed in a muffle furnace and sintered at 550°C After 3 hours, the furnace was naturally cooled to room temperature to obtain a Cu ion-doped titania photocatalyst with a Cu doping mass of 1%.

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Abstract

The invention relates to a preparation method of a titanium dioxide photocatalyst doped with metal ions. The preparation method comprises the following steps of: firstly, taking 20ml HNO3 solution and adding metal nitrate into the solution to obtain solution A; secondarily, putting the solution A on a magnetic stirrer for heating and stirring, when the solution volatiles to 15ml, dissolving tetrabutyl titanate into the solution A, continuously heating, stirring till TiO2 crystal doped with metal ions is obtained; finally, putting the TiO2 crystal doped with metal ions into a mortar for porphyrization, then sintering in a muffle furnace, naturally cooling the furnace to room temperature and obtaining the titanium dioxide photocatalyst doped with metal ions. The invention utilizes a uniform pyrohydrolysis method to prepare TiO2 doped with metal ions and prepares the needed raw materials into solution, leads the raw materials to be mixed uniformly on ion; and the obtained titanium dioxide photocatalyst doped with metal ions expands the absorption range to sunlight, improves photocatalytic activity and simultaneously enhances antibacterial effect.

Description

technical field [0001] The invention belongs to the field of environmental technology and nanometer material technology, and in particular relates to a preparation method of a metal ion-doped titanium dioxide photocatalyst. Background technique [0002] Since Japan Fujishima (Fjishima A, Honda K. Electrochemical photolysis of water at a semiconductor electrode [J]. Nature, 1972, 238: 37-38.) found in 1972 that titanium dioxide can be used as an electrode for photolysis of water, it has caused There has been an upsurge of research on the use of semiconductor photocatalysts to convert light energy into electrical and chemical energy. TiO 2 Utilize light energy to drive oxidation-reduction reaction, release oxygen from water, and use its own strong oxidation ability to decompose organic matter, so it has photocatalytic activity and antibacterial property. The catalyst can be used for environmental protection, making key devices of clean energy, as well as in medicine and medi...

Claims

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Application Information

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IPC IPC(8): B01J37/10B01J23/50B01J23/745B01J23/72B01J23/06B01J21/06
Inventor 杨辉王栋蔡日强
Owner SHAANXI UNIV OF SCI & TECH
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