A kind of preparation method of sulfur-doped oxygen-deficiency tio2 photocatalyst

A photocatalyst, sulfur-doped technology, applied in the field of photocatalytic materials

Active Publication Date: 2018-08-28
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in practice, few people have been found to be engaged in research in this area

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  • A kind of preparation method of sulfur-doped oxygen-deficiency tio2 photocatalyst
  • A kind of preparation method of sulfur-doped oxygen-deficiency tio2 photocatalyst

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[0034] A kind of sulfur-doped oxygen-deficient TiO 2 The preparation method of photocatalyst comprises the following steps:

[0035] (1) According to the fixed ratio of molar ratio n(Ti):n(Si)=1:2, Ti(SO 4 ) 2 and Na 2 SiO 3 9H 2 The amount of O, and then according to the molar ratio n(TiO 2 ): n(TiS 2 )=1:(0.03~0.1) ratio to determine Na 2 The amount of S and Ti(SO 4 ) 2 Supplementary dosage, thus determined Ti(SO 4 ) 2 total usage. Then based on the total molar amount of Ti and the molar ratio n(Ti):n(SO 4 )=1:(0.02~0.06) to determine doping (NH 4 ) 2 SO 4 the amount of introduction. Thereafter, the corresponding chemical reagents were weighed, and the Na 2 S, Ti(SO 4 ) 2 and (NH 4 ) 2 SO 4 dissolve into an aqueous solution;

[0036] (2) Na 2 SiO 3 9H 2 O Use deionized water to prepare an aqueous solution with a concentration of 0.60-0.65 mol / L, place it in a digitally controlled temperature-adjusted ultrasonic instrument, and first dissolve Ti(SO ...

Embodiment 1

[0042] (1) According to the fixed ratio of molar ratio n(Ti):n(Si)=1:2, Ti(SO 4 ) 2 and Na 2 SiO 3 9H 2 The amount of O, and then according to the molar ratio n(TiO 2 ): n(TiS 2 )=1:0.06 to determine Na 2 The amount of S and Ti(SO 4 ) 2 Supplementary dosage, thus determined Ti(SO 4 ) 2 total usage. Then based on the total molar amount of Ti and the molar ratio n(Ti):n(SO 4 )=1:0.04 to determine doping (NH 4 ) 2 SO 4 the amount of introduction. Thereafter, the corresponding chemical reagents were weighed, and the Na 2 S, Ti(SO 4 ) 2 and (NH 4 ) 2 SO 4 dissolve into an aqueous solution;

[0043] (2) Na 2 SiO 3 9H 2 O Use deionized water to prepare an aqueous solution with a concentration of 0.65 mol / L, place it in a digitally controlled temperature-adjusting ultrasonic instrument, and under the action of continuous stirring and ultrasonic waves at 50°C, Ti(SO 4 ) 2 Add the solution slowly, and continue adding Na slowly after 10 min 2 S solution. Conti...

Embodiment 2

[0050] (1) According to the fixed ratio of molar ratio n(Ti):n(Si)=1:2, Ti(SO 4 ) 2 and Na 2 SiO 3 9H 2 The amount of O, and then according to the molar ratio n(TiO 2 ): n(TiS 2 )=1:0.03 ratio to determine Na 2 The amount of S and Ti(SO 4 ) 2 Supplementary dosage, thus determined Ti(SO 4 ) 2 total usage. Then based on the total molar amount of Ti and the molar ratio n(Ti):n(SO 4 )=1:0.06 to determine doping (NH 4 ) 2 SO 4 the amount of introduction. Thereafter, the corresponding chemical reagents were weighed, and the Na 2 S, Ti(SO 4 ) 2 and (NH 4 ) 2 SO 4 dissolve into an aqueous solution;

[0051] (2) Na 2 SiO 3 9H 2 O Use deionized water to prepare an aqueous solution with a concentration of 0.60 mol / L, place it in a digitally controlled temperature-adjusted ultrasonic instrument, and firstly dissolve Ti(SO 4 ) 2 Add the solution slowly, and continue to add Na slowly after 5min 2 S solution. Continue ultrasonic stirring for 25 minutes to form a w...

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Abstract

The invention discloses a method for preparing a sulfur-doped hypoxia type TiO2 photocatalyst. Sodium silicate serves as a silicon source, titanium sulfate serves as a titanium source, sulfate radicals serve as a doped sulfur source, sodium sulfide serves as a reducing agent, first a silica gel immobilized TiO2 / TiS2 copolymer is prepared through an ultrasound copolymerization method, the mixing amount of the sulfate radicals is changed, a product precursor is synthesized by in-situ symbiosis at 140-160 DEG C, and finally a silica gel immobilized sulfur-doped hypoxia type TiO2 photocatalyst (S / hypoxia type TiO2) material is prepared through sintering at 650-800 DEG C under the protective atmosphere of N2. Obtained results indicate that the goals of O vacancy defect and S effective doping are achieved successfully, and good conditions are created for photocatalysis red shift of the TiO2 photocatalyst and efficient utilization of solar light. Besides, the product is high in purity and good in crystal condition.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic materials, in particular to a sulfur-doped oxygen-deficient TiO 2 Preparation method of photocatalyst. Background technique [0002] TiO 2 It is a semiconductor material with a variety of functional properties, and has always had important application value in the fields of chemical industry, electronics, energy, and environmental protection. Anatase TiO 2 It has non-toxic, high-efficiency photocatalytic performance, can effectively degrade organic pollutants in air and water, and is an ideal clean catalytic material for sewage treatment and air purification; similarly, TiO 2 As a semiconductor material, the photogenerated electron-hole effect can make CO 2 Photocatalytic conversion into renewable energy such as methanol and methane. Therefore, TiO 2 Photocatalytic materials play a very important role in the field of environmental protection and renewable energy. [0003] However, Ti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/04B01J37/10
CPCB01J27/04B01J35/004B01J37/10
Inventor 张超武王夏云张利娜张楠王芬
Owner SHAANXI UNIV OF SCI & TECH
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