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Method for synthesizing rutile phase titania photocatalyst containing electron-trapped oxygen vacancies

A technology of rutile phase and titanium dioxide, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of constraints, complicated preparation process, high equipment cost and production cost, and achieve uniform size and high production cost. Simple process and good reproducibility

Inactive Publication Date: 2017-04-26
HENAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the preparation process of the above-mentioned traditional synthesis method is too complicated and the equipment cost and production cost are too high, which seriously restricts its industrialization.

Method used

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  • Method for synthesizing rutile phase titania photocatalyst containing electron-trapped oxygen vacancies
  • Method for synthesizing rutile phase titania photocatalyst containing electron-trapped oxygen vacancies
  • Method for synthesizing rutile phase titania photocatalyst containing electron-trapped oxygen vacancies

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Dissolve 0.2 g of polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer P123 and 2.3 g of titanium tetraisopropoxide TTIP in 0.7 mL of concentrated hydrochloric acid, 2.35 mL of isopropanol, and 0.15 mL of deionized After the mixed solution was evaporated in an evaporating dish at room temperature for 12 hours, it was transferred to a hydrothermal reaction kettle and crystallized at 180°C for 12 hours. After the reaction was completed, the crystallized product was suction-filtered and dried naturally to obtain the target product.

[0027] According to attached figure 1 In the X-ray (XRD) spectrum of titanium dioxide photocatalyst, it can be seen that the diffraction peaks belong to the crystal structure of rutile phase titanium dioxide (JCPDS card number: 21-1276).

Embodiment 2

[0029] Dissolve 0.2 g of polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer P123 and 2.3 g of titanium tetraisopropoxide TTIP in 0.7 mL of concentrated hydrochloric acid, 2.35 mL of isopropanol, and 0.15 mL of deionized Then the mixed solution was evaporated in an evaporating dish at room temperature for 24 hours, then transferred to a hydrothermal reaction kettle for crystallization at 180°C for 24 hours, after the reaction was completed, the crystallized product was suction filtered and dried naturally to obtain the target product.

[0030] According to attached figure 2 The scanning electron microscope (SEM) of the titanium dioxide photocatalyst shows that the morphology of the prepared sample is very regular nanorods, about 200-250nm in length.

Embodiment 3

[0032] Dissolve 0.2 g of polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer P123 and 2.3 g of titanium tetraisopropoxide TTIP in 0.7 mL of concentrated hydrochloric acid, 2.35 mL of isopropanol, and 0.15 mL of deionized After the mixed solution was evaporated in an evaporating dish at room temperature for 24 hours, it was transferred to a hydrothermal reaction kettle and crystallized at 180°C for 48 hours. After the reaction was completed, the crystallized product was suction-filtered and dried naturally to obtain the target product. product.

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Abstract

The invention discloses a method for synthesizing a rutile phase titania photocatalyst containing electron-trapped oxygen vacancies and belongs to the technical field of synthesis of titania photocatalysts. According to key points of the technical scheme, the method disclosed by the invention comprises the following steps: dissolving a polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer P123 and titanium tetraisopropoxide TTIP in a mixed solution of concentrated hydrochloric acid, isopropanol and deionized water; evaporating the obtained mixed solution at room temperature in an evaporating dish, transferring into a hydrothermal reactor, and crystallizing at the temperature of 180-230 DEG C for 12-48 hours; and performing suction filtration on the crystallized product, naturally airing, thereby obtaining the rutile phase titania photocatalyst containing electron-trapped oxygen vacancies. The method disclosed by the invention is simple in preparation process, readily available in raw materials and high in reaction condition controllability, and the prepared material has high practical values and application prospects in the aspects such as environmental management, photocatalytic hydrogen production, dye-sensitized solar cells, photoelectric materials and the like.

Description

technical field [0001] The invention belongs to the technical field of synthesis of titanium dioxide photocatalysts, and in particular relates to a synthesis method of a rutile phase titanium dioxide photocatalyst containing bound electron oxygen vacancies. Background technique [0002] The semiconductor titanium dioxide material has the characteristics of high photocatalytic efficiency, stable structure, low price and non-toxicity, and has become one of the most attractive materials among many photocatalysts. However, due to TiO 2 The band gap is wide (the band gap energy is 3.0-3.2ev), and the light absorption wavelength is mainly limited to the ultraviolet region, which cannot be directly excited by visible light, and ultraviolet light only accounts for 4% of the sunlight reaching the earth's surface. Therefore, in order to make more use of the visible light in sunlight, how to prepare titanium dioxide with visible light response has become a major research hotspot in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06
CPCB01J21/063B01J35/39
Inventor 张朋玲刘统信
Owner HENAN NORMAL UNIV
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