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Photocatalyst responsive to ultraviolet light and visible light and preparation method thereof

A photocatalyst and visible light technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of low photon quantum efficiency, refractory quantity, and sunlight utilization rate Low-level problems, to achieve the effect of strong photocatalytic activity, environmental friendliness, and cheap raw materials

Active Publication Date: 2017-12-15
徐州博创建设发展集团有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Semiconductor photocatalysts widely used today are mainly transition metal oxides, such as TiO 2 , ZnO, WO 3 , Fe 2 o 3 etc., where TiO 2 It has been widely studied for its excellent photoelectric properties, but several defects limit its practical application: one is TiO 2 The band gap is wide (3.2eV), and it can only absorb light in the ultraviolet region, and the utilization rate of sunlight is low; the second is that the electrons and holes generated by photoexcitation are easy to recombine, and the photon quantum efficiency is extremely low (less than 4%). Difficult to treat industrial waste gas and wastewater with large quantity and high concentration

Method used

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  • Photocatalyst responsive to ultraviolet light and visible light and preparation method thereof
  • Photocatalyst responsive to ultraviolet light and visible light and preparation method thereof
  • Photocatalyst responsive to ultraviolet light and visible light and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0050] Preparation of Nd 5 FeTi 4 o 17 , according to the chemical formula Nd 5 FeTi 4 o 17 , respectively weigh neodymium oxide Nd 2 o 3 : 3.365 g, Fe2O3 2 o 3 : 0.320 g, titanium dioxide TiO 2 : 1.278g, after grinding and mixing the raw materials in an agate mortar, calcining for the first time in air atmosphere, the temperature of the first calcining is 400°C, the calcining time is 15 hours, after natural cooling, take out the sample, grind and mix uniformly Carry out the second calcination in the air atmosphere, the second calcination temperature is 900 ℃, the calcination time is 15 hours, after natural cooling, take out the sample, grind and mix evenly; carry out the final calcination under the air atmosphere, the final calcination temperature is 1250 ℃, the calcination time is 15 hours, and the photocatalyst powder is obtained.

[0051] See attached figure 1 , it is the X-ray powder diffraction spectrum of the sample prepared according to the technical scheme ...

Embodiment 2

[0057] Preparation of Nd 5 FeTi 4 o 17 , according to the chemical formula Nd 5 FeTi 4 o 17 , respectively weigh neodymium carbonate Nd 2 (CO 3 )·H 2 O: 4.865 grams, ferric oxide Fe 3 o 4 : 0.309 g, titanium dioxide TiO 2 : 1.278g, after grinding and mixing the raw materials in an agate mortar, select the air atmosphere for the first calcination, the temperature for the first calcination is 300°C, and the calcination time is 16 hours. Carry out the second calcination in the air atmosphere, the second calcination temperature is 800 ℃, the calcination time is 16 hours, after natural cooling, take out the sample, grind and mix evenly; carry out the final calcination in the air atmosphere, the final calcination temperature is 1200 ℃, the calcination time is 16 hours, and the photocatalyst Nd is obtained 5 FeTi 4 o 17 powder.

[0058] The sample prepared in this embodiment, its main structural morphology, ultraviolet-visible diffuse reflectance spectrum, degradation r...

Embodiment 3

[0060] Preparation of Nd 5 FeTi 4 o 17 , according to the chemical formula Nd 5 FeTi 4 o 17 , respectively weigh neodymium chloride NdCl 3 : 5.012 g, iron hydroxide Fe(OH) 3 : 0.427 g, titanium dioxide TiO 2 : 1.278g, after grinding and mixing the raw materials in an agate mortar, select the air atmosphere for the first calcination, the first calcination temperature is 800°C, the calcination time is 3 hours, after natural cooling, take out the sample, grind and mix evenly Carry out the second calcination under the air atmosphere, the second calcination temperature is 1100 ℃, the calcination time is 6 hours, after natural cooling, take out the sample, grind and mix evenly; carry out the final calcination under the air atmosphere, the final calcination temperature is 1300 ℃, The calcination time is 6 hours, and the photocatalyst Nd is obtained 5 FeTi 4 o 17 powder.

[0061] The sample prepared in this embodiment, its main structural morphology, ultraviolet-visible dif...

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Abstract

The invention discloses a photocatalyst responsive to ultraviolet light and visible light and a preparation method thereof. The chemical formula of the photocatalyst is Nd5FeTi4O17. The photocatalyst of the present invention has a high utilization rate of sunlight, a wide range of light absorption wavelengths, can decompose harmful chemical substances under the irradiation of ultraviolet light and visible light, has strong photocatalytic activity, is non-toxic and tasteless, and can be used in different environment applications. The Nd5FeTi4O17 of the present invention can be prepared by a variety of methods, the preparation method is flexible, simple and easy, the cost is low, the source of raw materials is abundant, the photocatalyst particles prepared are uniform, and the stability is good, and it has higher photocatalytic activity than commercial TiO2 , economical and practical, and has potential application value in wastewater treatment, environmental protection, hydrogen energy and other fields.

Description

technical field [0001] The invention relates to a photocatalyst and a preparation method thereof, in particular to a photocatalyst responsive to ultraviolet light and visible light and a preparation method thereof, and belongs to the technical field of inorganic photocatalytic materials. Background technique [0002] Since the 20th century, while enjoying the comfort and convenience brought by the rapid development of science and technology, human beings have also tasted the bitter fruit of the deteriorating living environment caused by blindness and short-sightedness. Controlling pollution, protecting the environment, and realizing sustainable development are the urgent desire and common aspiration of all mankind. Photocatalytic technology is a new environmental protection technology gradually developed from the 1970s under such a background. [0003] Photocatalysis refers to the process of using photocatalysts to absorb light to decompose organic matter or decompose water....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/83C02F1/32
CPCY02W10/37
Inventor 乔学斌
Owner 徐州博创建设发展集团有限公司
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