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Method for preparing SnO2 PC/CdS QDs composite photocatalyst with high-stability visible-light catalytic activity

A catalytic activity, visible light technology, applied in the field of material chemistry, can solve problems such as low utilization of visible light, and achieve the effect of improving migration and separation efficiency and improving efficiency

Inactive Publication Date: 2014-02-26
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the SnO 2 Wide bandgap (3.7eV) results in low utilization of visible light (43% of solar energy)

Method used

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  • Method for preparing SnO2 PC/CdS QDs composite photocatalyst with high-stability visible-light catalytic activity
  • Method for preparing SnO2 PC/CdS QDs composite photocatalyst with high-stability visible-light catalytic activity
  • Method for preparing SnO2 PC/CdS QDs composite photocatalyst with high-stability visible-light catalytic activity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) FTO conductive glass with a thickness of 1.1 mm and a surface resistance of 15 Ω / sq was ultrasonically cleaned with acetone, absolute ethanol and pure water in turn, and dried with a hair dryer for use;

[0034] (2) SnCl 2 (10g), SbCl 3 (0.5g) Prepared as tin dioxide sol, the solvent is 100mL absolute ethanol, and a little concentrated hydrochloric acid is added dropwise until it is clear. SnCl in the sol 2 / SbCl 3 Mass ratio = 20:1, and keep magnetic stirring for later use;

[0035] (3) Insert the clean FTO conductive glass vertically into the sol of step (2) and soak for 5 minutes, slowly remove the infiltrated microsphere template at a certain pulling speed and dry it at room temperature. Repeat the above process 10 times to ensure that the tin dioxide sol fully infiltrates the FTO glass to obtain a SnO2 sol film;

[0036] (4) The SnO prepared in step (3) 2 The sol film was calcined in a tube furnace at 450°C for 2h, and the heating rate during the calcining process wa...

Embodiment 2

[0039] A Highly Stable Visible Light Catalytic Activity SnO 2 The preparation method of PC / CdS photonic crystal structure composite photocatalyst, this method is to prepare SnO2 photonic crystal on FTO substrate by liquid deposition method, and then use continuous chemical water bath deposition method assisted by sonic digestion, and use CdS quantum dots for sensitivity And prepared a new type of SnO 2 PC / CdS photonic crystal structure. The method specifically includes the following steps:

[0040] (1) FTO conductive glass with a thickness of 1.1 mm and a surface resistance of 15 Ω / sq was ultrasonically cleaned with acetone, absolute ethanol and pure water in turn, and dried with a hair dryer for use;

[0041] (2) The suspension of polystyrene microspheres with a size of 190nm and 5%wt is diluted with deionized water to 0.05wt%, and ultrasonically shaken for 60min to make it uniformly dispersed. Put the conductive glass prepared in step (1) vertically into a uniformly dispersed ...

Embodiment 3

[0050] A Highly Stable Visible Light Catalytic Activity SnO 2 The preparation method of PC / CdS photonic crystal structure composite photocatalyst, the method is to prepare SnO on FTO substrate by liquid deposition method 2 Photonic crystals were then sensitized with CdS quantum dots using continuous chemical water bath deposition assisted by sonic digestion to prepare a new type of SnO 2 PC / CdS photonic crystal structure. The method specifically includes the following steps:

[0051] (1) FTO conductive glass with a thickness of 1.1 mm and a surface resistance of 15 Ω / sq was ultrasonically cleaned with acetone, absolute ethanol and pure water in turn, and dried with a hair dryer for use;

[0052] (2) Dilute the 5%wt polystyrene microsphere suspension with a size of 240nm to 0.05wt% with deionized water, and ultrasonically shake for 60min to make it uniformly dispersed. Put the conductive glass prepared in step (1) vertically into a uniformly dispersed polystyrene microsphere suspe...

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Abstract

The invention relates to a method for preparing a SnO2 PC / CdS photonic-crystal-structure composite photocatalyst with high-stability visible-light catalytic activity. According to the method, SnO2 photonic crystal is prepared on an FTO (Fluorine Doped Tin Oxide) substrate by using a liquid phase deposition method, and subsequently sensibilization is performed through CdS quantum dots by using a continuous chemical water bath deposition method under the sound wave decomposition assistance, so as to prepare a novel SnO2PC / CdS photonic crystal structure. As far as we know, a photonic crystal composite sensitizer is firstly utilized to improve the SnO2 photocatalytic activity.

Description

Technical field [0001] The invention relates to the field of material chemistry and the technical field of photoelectrochemical methods, and relates to a SnO with high stable visible light catalytic activity 2 The preparation method of PC / CdS QDs composite photocatalyst material. Background technique [0002] As a pollution control technology with low energy consumption, environmental friendliness, and thorough degradation, photocatalytic technology has received widespread attention in recent years. However, the commonly used semiconductor catalysts have become a bottleneck restricting their development due to their low quantum efficiency and the inability to use visible light. At present, scientists have devised a variety of new semiconductor photocatalysts to improve the utilization of light. According to these designs, the modification and modification of the photocatalyst can be divided into two aspects: on the one hand, the light response range of the catalyst is expanded ...

Claims

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Application Information

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IPC IPC(8): B01J27/04
Inventor 张亚雷张永刚郭肃晋周雪飞李德毅
Owner TONGJI UNIV
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