Novel photo-catalytic material as well as preparation method and application thereof

A photocatalytic material and photocatalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., to achieve the effects of mild preparation conditions, enhanced separation rate, and improved activity

Active Publication Date: 2018-10-16
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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  • Novel photo-catalytic material as well as preparation method and application thereof
  • Novel photo-catalytic material as well as preparation method and application thereof
  • Novel photo-catalytic material as well as preparation method and application thereof

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 photo-catalytic material as well as a preparation method and application thereof. The material is a tetragonal ZrO2 nanoparticle-modified g-C3N4 organic photocatalyst and is prepared and synthesized by melamine and zirconium nitrate as raw materials in air through a one-step calcination method. The electronic structures and the photocatalytic activities of tetragonal ZrO2 nanoparticles attached onto the surface of the catalyst are significantly changed, so that the photocatalytic activity of a laminar g-C3N4 material with the attached tetragonal ZrO2 nanoparticles for Rhodamine B degradation and water decomposition under visible light irradiation is greatly enhanced. Compared with a pure phase g-C3N4 photocatalyst, the catalyst is improved by 1.5-14.4 timesin the efficiency of the Rhodamine B degradation under visible light. Compared with tetragonal ZrO2 with zero catalytic efficiency, the catalyst is significantly improved in performance. In addition,the preparation method disclosed by the invention is mild in conditions, convenient to operate and conducive 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 Applications(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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