Visible light responded layered titanic acid photocatalyst as well as peroxidation modifying method and application of visible light responded layered titanic acid photocatalyst

A photocatalyst and visible light technology, applied in the field of photocatalytic materials, can solve problems such as not suitable for mass production, slow modification speed, complex process, etc., and achieve strong visible light catalytic activity, fast modification speed and simple process.

Inactive Publication Date: 2016-06-22
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods have slow modification speed, complex process, difficult control, and are not suitable for mass production.

Method used

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  • Visible light responded layered titanic acid photocatalyst as well as peroxidation modifying method and application of visible light responded layered titanic acid photocatalyst
  • Visible light responded layered titanic acid photocatalyst as well as peroxidation modifying method and application of visible light responded layered titanic acid photocatalyst
  • Visible light responded layered titanic acid photocatalyst as well as peroxidation modifying method and application of visible light responded layered titanic acid photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] According to layered titanic acid and H 2 o 2 The dosage of the aqueous solution is 0.5g: 200mL, the layered titanate H 1.07 Ti 1.73 o 4 The white powder is added to the concentration of 5% H 2 o 2 In the aqueous solution, after stirring for 1 min, filter, wash with deionized water, and dry at 40° C. for 1 h to obtain yellow peroxide layered titanic acid powder.

Embodiment 2

[0028] According to layered titanic acid and H 2 o 2 The dosage of the aqueous solution is 1g: 50mL, the layered titanic acid white powder H 1.07 Ti 1.73 o 4 added to a concentration of 30% H 2 o 2 In the aqueous solution, after stirring for 10 minutes, filter, wash with deionized water, and dry at 80° C. for 1 hour to obtain yellow peroxide layered titanic acid powder.

Embodiment 3

[0030] According to layered titanic acid and H 2 o 2 The dosage of the aqueous solution is 1g: 50mL, the layered titanic acid white powder H 1.07 Ti 1.73 o 4 added to a concentration of 30% H 2 o 2 In the aqueous solution, after stirring for 1 min, filter, wash with deionized water, and dry at 55° C. for 1 h to obtain yellow peroxide layered titanic acid powder.

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Abstract

The invention discloses a visible light responded layered titanic acid photocatalyst as well as a peroxidation modifying method and application of the visible light responded layered titanic acid photocatalyst, and belongs to the field of photocatalytic materials. The visible light responded layered titanic acid photocatalyst yellow powder is obtained by the following steps: adding layered titanic acid white powder into an H2O2 water solution; after stirring to react, filtering and washing with de-ionized water; drying. Ti-O-O- coordination bonds exist between TiO6 octahedral layers of the prepared visible light responded layered titanic acid photocatalyst. Compared with products of solid-phase high-temperature doping modification and heterogeneous semi-conductive compounding, H2O2 peroxidation modified layered titanic acid has the advantages of rapid modifying speed, simple technical process and easiness of controlling, is suitable for large-batch production and the like. The lot of Ti-O-O- coordination bonds exist between the TiO6 octaheadral layers of the prepared visible light responded layered titanic acid photocatalyst prepared by the method, and the forbidden bandwidth is 2.2eV to 2.5eV; the visible light catalytic activity is stronger than that of commercial titanium dioxide P25, so that the visible light responded layered titanic acid photocatalyst can be widely applied to the aspect of degrading environment pollutants or organic matters.

Description

technical field [0001] The invention belongs to the field of photocatalytic materials, and in particular relates to a visible light-responsive layered titanic acid photocatalyst and a peroxidation modification method and application thereof. Background technique [0002] Due to the layered structure of titanic acid (H 1.07 Ti 1.73 o 4 , H 2 Ti 4 o 9 , H 2 Ti 3 o 7 , H 2 Ti 5 o 11 , H 0.67 Ti 1.83 o 4 etc.) have an open structure. Scholars at home and abroad focus on exfoliating layered titanic acid to synthesize two-dimensional layered titanic acid nanosheets or two-dimensional nano-titanium dioxide derivative nanosheets. These two-dimensional materials have excellent performance. Due to the large band gap of layered titanic acid itself, it can only respond to ultraviolet light and cannot be well applied in the field of photocatalysis. Most scholars mainly use it to form heterojunctions with other semiconductors in photocatalysis. This also limits its applica...

Claims

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Application Information

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IPC IPC(8): B01J38/70B01J21/06C02F1/30B01D53/86B01D53/44C02F101/30
CPCB01D53/8687C02F1/30B01J21/063B01J38/70C02F2101/308B01D2255/20707B01D2255/802B01J35/39
Inventor 孔新刚曾超斌黄剑锋吴建鹏殷立雄欧阳海波
Owner SHAANXI UNIV OF SCI & TECH
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