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Methods for Improving Photocatalyst Activity

A technology of photocatalyst and activity, which is applied in the field of improving photocatalyst activity, can solve the problems of low catalytic efficiency of photocatalyst, restricting the development and promotion of nanophotocatalyst technology, etc.

Active Publication Date: 2018-10-16
SHENZHEN KITEWAY AUTOMATION ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, due to the low catalytic efficiency of photocatalysts, the development and promotion of nanophotocatalyst technology has been restricted.

Method used

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  • Methods for Improving Photocatalyst Activity
  • Methods for Improving Photocatalyst Activity
  • Methods for Improving Photocatalyst Activity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Such as figure 1 Shown, the first kind of method of improving photocatalyst activity of the present invention comprises the following steps:

[0040] S1, prepare copper ion solution and silver ion solution, the copper ion concentration in the copper ion solution is greater than 0.1ppm, and the silver ion concentration in the silver ion solution is greater than 0.1ppm, respectively placed in different containers;

[0041] S2. Put the photocatalyst into the copper ion solution first, and continuously irradiate it with an ultraviolet light source for 1h-24h;

[0042] S3, put the photocatalyst into the silver ion solution again, and continuously irradiate with an ultraviolet light source for 1h-24h;

[0043] S4. Take out the photocatalyst, wash it, and dry it.

[0044] In step S2, after the photocatalyst is solidified on the carrier, it is put into the copper ion solution and completely submerged.

[0045] In step S1, ultraviolet light is used to directly irradiate the c...

Embodiment 2

[0048] Such as figure 2 Shown, a preferred technical solution of the present invention is as follows:

[0049] A method for improving photocatalytic activity, comprising the steps of:

[0050] S1, prepare copper ion solution and silver ion solution, the copper ion concentration in the copper ion solution is 0.5ppm, and the silver ion concentration in the silver ion solution is 0.25ppm, respectively placed in different containers;

[0051] S2. Put the photocatalyst into the copper ion solution first, and continuously irradiate it with an ultraviolet light source with a wavelength of 185nm for 3h;

[0052] S3, put the photocatalyst into the silver ion solution again, and continuously irradiate it with an ultraviolet light source with a wavelength of 185nm for 3h;

[0053] S4. Take out the photocatalyst, wash it, and dry it.

[0054] In step S1, ultraviolet light is used to directly irradiate the copper body and silver body immersed in water to obtain copper ion solution and ...

Embodiment 3

[0055] Such as image 3 As shown, another preferred technical solution of the present invention is as follows:

[0056] A method for improving photocatalytic activity, comprising the steps of:

[0057] S1, prepare copper ion solution and silver ion solution, copper ion concentration in the copper ion solution is 1ppm, silver ion concentration in the silver ion solution is 0.5ppm, respectively placed in different containers;

[0058] S2. Put the photocatalyst into the copper ion solution first, and continuously irradiate it with an ultraviolet light source with a wavelength of 254nm for 3h;

[0059] S3, putting the photocatalyst into the silver ion solution again, and continuously irradiating it with an ultraviolet light source with a wavelength of 254nm for 3h;

[0060] S4. Take out the photocatalyst, wash it, and dry it.

[0061] In step S1, ultraviolet light is used to directly irradiate the copper body and silver body immersed in water to obtain copper ion solution and sil...

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Abstract

The invention discloses a method for improving activity of photocatalyst. The method comprises the following steps: (1) preparing a copper ion solution and a silver ion solution and respectively putting into different containers, wherein the copper ion concentration in the copper ion solution is more than 0.1ppm and the silver ion concentration in the silver ion solution is more than 0.1ppm; (2) putting the photocatalyst into the copper ion solution and continuously irradiating for 1h-24h with a ultraviolet source; (3) putting the photocatalyst into the silver ion solution and continuously irradiating for 1h-24h with the ultraviolet source; (4) taking the photocatalyst out, cleaning and airing. According to the method, the excitation electron is prevented from rebounding to valence band and the efficiency of the photocatalyst is increased.

Description

technical field [0001] The invention relates to the technical field of photocatalysts, in particular to a method for improving the activity of photocatalysts. Background technique [0002] Photocatalyst is a general term for chemical substances that can play a catalytic role under the excitation of photons. There are many materials that can be used as photocatalysts in the world, including titanium dioxide (TiO2), zinc oxide (ZnO), tin oxide (SnO2), zirconium dioxide (ZrO2), cadmium sulfide (CdS) and other oxide sulfide semiconductors, among which titanium dioxide (Titanium Dioxide) has become the most important nano-photocatalyst material in the world because of its strong oxidation ability, stable and non-toxic chemical properties. Photocatalysts have been widely studied and applied in the fields of water treatment and air purification. [0003] However, due to the low catalytic efficiency of photocatalysts, the development and promotion of nanophotocatalyst technology h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/89
CPCB01J23/8926B01J35/004
Inventor 张连峰张金松宛如意袁振杨照唐思明
Owner SHENZHEN KITEWAY AUTOMATION ENG
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