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A novel photocatalytic material and its preparation method and application

A photocatalytic material, a new type of technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., to achieve the effects of mild preparation conditions, phase transfer promotion, and simple preparation process

Active Publication Date: 2021-04-06
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Tetragonal ZrO prepared by one-step calcination 2 Nanoparticle-regulated layered g-C 3 N 4 Photocatalyst materials and photocatalytic degradation of organic matter and water splitting to produce hydrogen have not been reported so far

Method used

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  • A novel photocatalytic material and its preparation method and application
  • A novel photocatalytic material and its preparation method and application
  • A novel photocatalytic material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Weigh 5g of melamine and place it in a crucible, cover tightly and place it in a muffle furnace for calcination. The calcination temperature is 550°C, and the calcination time is 5h. Take it out at room temperature to obtain the pure phase g-C 3 N 4 .

[0032] Such as figure 1 Shown in c, g-C prepared for the implementation of the present invention 3 N 4 physical map.

[0033] Such as figure 2 Shown in the line a in the middle, g-C prepared for the implementation of the present invention 3 N 4 The XRD picture, shows that the prepared g-C 3 N 4 With graphite phase crystal.

[0034] Such as image 3 Shown in the b line in the middle, it is the layered g-C prepared by the implementation of the present invention 3 N 4 The UV-Vis absorption spectrum of the prepared layered g-C 3 N 4 It can absorb visible light, and has a certain absorption capacity in the range of 600-800nm.

Embodiment 2

[0036] Weigh 5g of zirconium nitrate and place it in a crucible, cover tightly and place it in a muffle furnace for calcination. The calcination temperature is 550°C, the calcination time is 5h, and the pure phase ZrO is obtained by taking it out at room temperature. 2 .

[0037] Such as figure 1 Shown in a, is the ZrO prepared by the implementation of the present invention 2 physical map of

[0038] Such as figure 2 Shown in line c in the middle, it is the ZrO prepared by the implementation of the present invention 2 The XRD picture shows that the ZrO prepared by direct calcination of zirconium nitrate 2 It has the characteristics of co-existence of monoclinic phase and tetragonal phase.

[0039] Such as image 3 Shown in line c in the middle, it is the ZrO prepared by the implementation of the present invention 2 The UV-Vis absorption spectrum of the prepared ZrO 2 It hardly absorbs visible light, and only has certain absorption ability in the ultraviolet range.

Embodiment 3

[0041] Weigh 5g of melamine and 2.5g of zirconium nitrate (mass ratio, melamine: zirconium nitrate = 2:1) and place in a crucible, cover tightly and place in a muffle furnace for calcination, the calcination temperature is 550°C, the calcination time is 5h, room temperature Take out to get the initial tetragonal ZrO 2 Nanoparticle-regulated layered g-C 3 N 4 , and then, the sample was fully washed with deionized water, centrifuged, and dried to obtain the tetragonal ZrO 2 Nanoparticle-regulated layered g-C 3 N 4 Final sample of photocatalyst material.

[0042] Such as figure 2 Shown in the b line in the middle, it is the tetragonal phase ZrO prepared by the implementation of the present invention 2 Nanoparticle-modified layered g-C 3 N 4 The XRD picture shows that the directly obtained sample contains layered g-C 3 N 4 and ZrO 2 nanoparticles, and basically only tetragonal ZrO 2 .

[0043] Such as image 3 Shown in a line in the middle, prepare tetragonal phase ...

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Abstract

The invention discloses a novel photocatalytic material, its preparation method and application. The material is tetragonal ZrO 2 Nanoparticle-modified g‑C 3 N 4 The organic photocatalyst is synthesized by one-step calcination in air with melamine and zirconium nitrate as raw materials. The tetragonal ZrO attached to the surface of the catalyst 2 The nanoparticles significantly changed their electronic structure and photocatalytic activity, making the attachment of tetragonal ZrO 2 Layered g‑C after nanoparticles 3 N 4 The photocatalytic activity of the material for degrading rhodamine B and splitting water is greatly enhanced under visible light irradiation. Compared to pure phase g‑C 3 N 4 As for the photocatalyst, the visible light degradation efficiency of rhodamine B of the catalyst of the present invention is increased by 1.5 to 14.4 times, and the efficiency of visible light water splitting is increased by 1.14 to 2.53 times. Compared with tetragonal ZrO with zero catalytic efficiency 2 , the performance of the catalyst is significantly improved. In addition, the method of the invention has mild conditions, simple operation and is beneficial to large-scale production.

Description

technical field [0001] The invention belongs to the technical field of catalyst materials, and relates to a novel photocatalytic material and its preparation method and application, in particular to a tetragonal phase ZrO 2 Nanoparticle-modified layered g-C 3 N 4 Photocatalyst and its preparation method and application. Background technique [0002] A photocatalyst is a material that can absorb sunlight by itself and play a catalytic role under the excitation of photons. So far, various catalysts have been widely used in the treatment of air pollutants, sewage, photocatalytic water splitting, hydrogen production, and energy storage due to their excellent characteristics. In recent years, with the development of the global industrial field and the extensive use of fossil fuels in daily life, air and water pollution has become increasingly serious, and energy issues have become increasingly tense, which will inevitably affect the sustainable development of human society. I...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24C02F1/30C02F101/30
CPCB01J27/24B01J35/004C02F1/30C02F2101/308C02F2305/10
Inventor 吴永李灿李环环宫银燕牛棱渊刘心娟
Owner CHINA JILIANG UNIV
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