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TiO2 nanomaterial with visible-light catalytic activity, and application and preparation method thereof

A nanomaterial and catalytic activity technology, applied in the field of nanomaterials, can solve the problems of increased cost, complicated preparation process, etc., and achieve the effects of convenient operation, simple preparation process and simple equipment

Inactive Publication Date: 2016-03-02
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But most of the modification methods usually need to add TiO 2 Other reagents besides make the preparation process complicated and the cost will increase accordingly

Method used

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  • TiO2 nanomaterial with visible-light catalytic activity, and application and preparation method thereof
  • TiO2 nanomaterial with visible-light catalytic activity, and application and preparation method thereof
  • TiO2 nanomaterial with visible-light catalytic activity, and application and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Example 1—TiO 2 Nanomaterials 1:

[0036] Its preparation process is as follows:

[0037] 1) Preparation of TiO 2 Suspension: 30mg of TiO 2 The powder was added into 0.8g of deionized water, and ultrasonicated for 1-30min.

[0038] 2) Laser treatment: use Nd:YAG laser with a wavelength of 355nm and a laser power of 0.1W to irradiate the TiO prepared in step 1) 2 Suspension 120min.

[0039] 3) Centrifugal drying: the TiO after laser treatment in step 2) 2 After the suspension is centrifuged, pour off the supernatant, put it in an oven at 60-160°C to dry for 5-24 hours, and finally obtain TiO with visible light catalytic activity. 2 nanomaterials.

[0040] figure 1 For the obtained TiO of embodiment 1 2 The photo of the scanning electron microscope (SEM) of the nanomaterial, as can be seen from the figure, the obtained TiO 2 The nanomaterial is a regular spherical structure, and the diameter of the ball is about 80-200nm. figure 2 Gained TiO for the embodim...

Embodiment 2

[0043] Example 2—TiO 2 Nanomaterials 2:

[0044] Its preparation process is as follows:

[0045] To test the addition of TiO 2 The amount of the resulting TiO 2 Influence of visible-light photocatalytic activity of nanomaterials, except TiO 2 Except that the addition amount is different, other reaction conditions are all identical with embodiment 1. The results show that when TiO 2 The TiO 2 The degradation degrees of photocatalytic degradation of rhodamine solution by nanomaterials were: 34%, 33%, 28%, 25%, 10% and 5%. The reason may be that when TiO 2 When the amount added is too much, the TiO irradiated by the laser 2 The proportion decreases, resulting in the resulting TiO 2 The proportion of laser treatment in the medium is reduced, so that the degree of degradation is reduced. Therefore, in TiO with visible light catalytic activity 2 During the preparation of nanomaterials, TiO 2 The added amount is preferably 10-50 mg, more preferably 10-30 mg.

[0046] ...

Embodiment 3

[0049] Example 3—TiO 2 Nanomaterials 3:

[0050] Its preparation process is as follows:

[0051] In order to check the effect of the amount of deionized water added on the obtained TiO 2 The effect of visible light catalytic activity of nanomaterials, except that the addition of deionized water is different, other reaction conditions are the same as in Example 1. The results showed that when the addition amount of deionized water was 0.1, 0.3, 0.5, 1.5, 3, 5g and 10g, the prepared TiO 2 Photocatalytic degradation of nanomaterials The degradation degrees of rhodamine solutions were 5%, 10%, 30%, 33%, 34%, 33%, and 25%, respectively; the reason may be that when the amount of deionized water is too small, laser irradiation to TiO 2 The proportion decreases, resulting in the resulting TiO 2 The proportion of laser treatment in the medium is reduced, so that the degree of degradation is reduced. Therefore, in TiO with visible light catalytic activity 2 During the preparat...

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Abstract

The invention discloses a nanomaterial with visible-light photocatalytic activity, and an application and a preparation method thereof, and particularly relates to a TiO2 nanomaterial with visible-light photocatalytic activity, and an application and a preparation method thereof. According to the TiO2 nanomaterial with visible-light photocatalytic activity, the particles of the nanomaterial are spherical and each has a diameter of 20-500 nm; and the surfaces of the particles are covered with Ti3+ and Ti-OH. The TiO2 nanomaterial disclosed by the invention can have a high light absorption property under the radiation of visible light, and meanwhile, the preparation technology of the TiO2 nanomaterial is simple. Only TiO2 and deionized water are used as raw materials, and no other reagents are used. Moreover, reaction devices for high temperature and high pressure are not needed. Therefore, the equipment is simple; the operation is convenient; the required time is short; and the process cost is reduced to a greater extent.

Description

technical field [0001] The invention relates to a nanometer material with visible light catalytic activity, application and preparation method thereof, in particular to a TiO with visible light catalytic activity 2 Nanomaterials, applications and methods of preparation. Background technique [0002] TiO 2 It is an important functional material with broad application prospects and has good photocatalytic activity. It has been widely used in water resource protection and other fields in recent years. TiO 2 As a photocatalyst for sewage treatment, it can degrade more than 3,000 refractory organic compounds under ultraviolet irradiation. Among various semiconductor photocatalytic materials, TiO 2 Biologically and chemically inert, highly resistant to light and chemical corrosion, best suited for a wide range of environmental applications. [0003] But TiO 2 Wide band gap, anatase TiO 2 The forbidden band width is 3.2eV, which is equivalent to the energy of photons with a ...

Claims

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Application Information

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IPC IPC(8): B01J21/06B01J35/08B01J37/34
Inventor 陈星刘雷赵东旭刘可为申德振
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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