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Preparation of high-efficiency TiO2 photocatalyst and application of high-efficiency TiO2 photocatalyst in degradation of water pollutants

A photocatalyst and high-efficiency technology, applied in water pollutants, physical/chemical process catalysts, chemical/physical processes, etc., can solve problems such as large band gap, unreported photocatalytic degradation performance, and low solar energy utilization rate

Pending Publication Date: 2020-07-31
FUYANG NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, due to the large band gap of titanium dioxide (E g =3.0~3.2eV), it is only limited to absorbing ultraviolet light, and ultraviolet light only accounts for less than 5% of sunlight, and the utilization rate of solar energy is very low. In addition, its photogenerated electrons-holes are easy to recombine, which is very Largely inhibited the application of titanium dioxide
[0007] These studies have made some progress, but there are still no reports on the photocatalytic degradation performance of titanium dioxide on rhodamine B and / or nitrobenzene in water.

Method used

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  • Preparation of high-efficiency TiO2 photocatalyst and application of high-efficiency TiO2 photocatalyst in degradation of water pollutants
  • Preparation of high-efficiency TiO2 photocatalyst and application of high-efficiency TiO2 photocatalyst in degradation of water pollutants
  • Preparation of high-efficiency TiO2 photocatalyst and application of high-efficiency TiO2 photocatalyst in degradation of water pollutants

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preparation example Construction

[0031] According to a first aspect of the present invention, a kind of efficient TiO is provided 2 The preparation method of photocatalyst, described preparation method comprises the following steps:

[0032] Step 1, preparing carbon nanospheres;

[0033] Step 2, prepare TiO 2 catalyst of light.

[0034] In one embodiment, step 1 Include the following steps:

[0035] Step 1-1, dissolving hydrocarbons in solvent I and mixing uniformly;

[0036] Step 1-2, heating reaction;

[0037] Steps 1-3, post-processing, to obtain carbon nanospheres.

[0038] In a preferred embodiment, in step 1-1, the hydrocarbon is selected from sucrose, glucose, maltose, maltotriose;

[0039] The solvent I is selected from distilled water, deionized water, purified water, preferably distilled water;

[0040] In step 1-2, the heating temperature is 140-180°C;

[0041] In steps 1-3, the post-treatment includes centrifugation, washing and drying.

[0042] In a further preferred embodiment, in ste...

Embodiment 1

[0097] Add 12mL of absolute ethanol to a 50mL small beaker, then add 6mL of tetra-n-butyl titanate, then add 2mL of glacial acetic acid and 1mL of distilled water, stir well; stir on a magnetic stirrer for 12h;

[0098] Then add 0.3g of carbon nanospheres prepared by the present invention to the above system, and react in a constant temperature water bath at 40°C for 24h;

[0099] Cool to room temperature, dry in an oven, grind and roast in a muffle furnace at a rate of 5.5 °C / min, 300 °C for 2 h; 500 °C for 3 h to obtain TiO 2 Photocatalyst, denoted as TiO 2 (A-1).

Embodiment 2

[0101] The present embodiment is the same as the method used in embodiment 1, the only difference is that the titanium source is tetraisopropyl titanate, and the obtained TiO 2 Photocatalyst, denoted as TiO 2 (A-2).

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Abstract

The invention provides preparation of an efficient TiO2 photocatalyst and application of the efficient TiO2 photocatalyst in the degradation of water pollutants. The efficient TiO2 photocatalyst is prepared by taking carbon nano spheres as a template and taking tetra-n-butyl titanate and tetra-isopropyl titanate as titanium sources respectively; and X-ray powder diffraction (XRD), photoluminescence spectrum (PL), ultraviolet-visible diffuse reflection spectrum (UV-Vis DRS) and other means are adopted to characterize the sample. The photocatalytic degradation performance of a photocatalytic reaction system device on two representative pollutants, namely rhodamine B and nitrobenzene, in a water body is explored, and the degradation rates can reach 91.7% and 83.4% respectively.

Description

technical field [0001] The invention relates to the field of photocatalysts, in particular to a novel photocatalyst for treating wastewater pollution and a preparation method thereof. Background technique [0002] At present, water pollution control is mainly carried out by sedimentation method, adsorption method, microbial method, filtration method and so on. However, these treatment methods have problems such as high cost, long reaction time, and easy generation of secondary pollution. [0003] It can be seen that looking for a simple, efficient, fast, low-cost, and environmentally friendly water pollution control method has become a research hotspot at present. [0004] Photocatalytic technology has aroused extensive interest of researchers in recent years. A new method of using light energy to achieve environmental purification and generate clean energy is called photocatalytic technology. Because titanium dioxide (TiO 2 ) has the characteristics of photocatalytic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/18C02F1/30C02F1/32C02F101/30C02F101/38
CPCB01J21/18C02F1/30C02F1/32C02F2101/38C02F2101/308B01J35/39
Inventor 李慧泉金晓艳管清梅郝扶影柴兰兰崔玉民王洪刚
Owner FUYANG NORMAL UNIVERSITY
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