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A simultaneous preparation of c 3 no 4 and tio x no 2-x Visible light catalyst method

A technology of C3N4 and catalysts, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, catalyst activation/preparation, etc., can solve environmental pollution and other problems, and achieve the effect of reducing environmental pollution, reducing impact, and reducing pollution

Active Publication Date: 2022-03-25
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently, C 3 N 4 Most of them are prepared by calcination of precursors containing nitrogen and carbon at high temperature. However, some harmful gases such as CO and NH will be produced during the process of calcination and decomposition. 3 , will also cause environmental pollution to a certain extent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) 1 g of TiO was added at room temperature 2 The powder and 1 g of metal Zn powder were fully ground in a mortar and uniform, and then the uniformly ground mixture was transferred to a vacuum heating furnace, heated at 910 °C for 1 hour under vacuum conditions, and then naturally cooled to room temperature.

[0019] (2) The cooled TiO 2 Add to 0.15M hydrochloric acid solution, stir well for 5 hours, completely dissolve ZnO and unreacted Zn powder in the sample, then wash the product to neutrality, and dry to obtain the desired oxygen-deficient TiO 2 .

[0020] (3) The mixture of 3g urea and 2g melamine nitrogen-containing carbon precursor is fully ground in a mortar and uniform, and then mixed with oxygen-deficient TiO 2 They were transferred to a tube furnace together, and nitrogen gas was introduced, the nitrogen flow rate was 40ml / min, and the nitrogen gas flow was blown from the nitrogen-containing carbon precursor to the oxygen-deficient TiO 2 , heated to 550°...

Embodiment 2

[0022] (1) 1.5g of TiO at room temperature 2 The powder and 1 g of metal Zn powder were fully ground in a mortar and uniform, and then the uniformly ground mixture was transferred to a vacuum heating furnace, heated at 910 °C for 5 hours under vacuum conditions, and then cooled to room temperature naturally.

[0023] (2) The cooled TiO 2 Add to 0.15M nitric acid solution, stir well for 1 hour, completely dissolve ZnO and unreacted Zn powder in the sample, then wash the product to neutrality, and dry to obtain the desired oxygen-deficient TiO 2 .

[0024] (3) The mixture of 2.5g urea and 2.5g tripolyhydroxylamine nitrogen-containing carbon precursor was fully ground in a mortar and uniform, and then mixed with oxygen-deficient TiO 2 They were transferred to a tube furnace together, and nitrogen was introduced at a flow rate of 30 ml / min. The nitrogen flow was blown from the nitrogen-containing carbon precursor to the oxygen-deficient TiO. 2 , heated to 600°C at a heating rat...

Embodiment 3

[0026] (1) 0.8g TiO was added at room temperature 2 The powder and 1 g of metal Zn powder were fully ground in a mortar and uniform, and then the uniformly ground mixture was transferred to a vacuum heating furnace, heated at 910 °C for 3 hours under vacuum conditions, and then cooled to room temperature naturally.

[0027] (2) The cooled TiO 2Add to 0.15M nitric acid solution, stir well for 3 hours, completely dissolve ZnO and unreacted Zn powder in the sample, then wash the product to neutrality, and dry to obtain the desired oxygen-deficient TiO 2 .

[0028] (3) The mixture of 4g urea and 1g tripolyhydroxylamine nitrogen-containing carbon precursor was fully ground in a mortar and uniform, and then mixed with oxygen-deficient TiO 2 They were transferred to a tube furnace together, and nitrogen was introduced at a flow rate of 50 ml / min. The nitrogen flow was blown from the nitrogen-containing carbon precursor to the oxygen-deficient TiO. 2 , heated to 400°C at a heating ...

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Abstract

The present invention relates to a kind of synchronous preparation C 3 N 4 and TiO x N 2‑x Visible light catalyst method. In the present invention, TiO 2 Grind and mix well with the reducing agent, and then put the fully mixed TiO 2 And reducing agent vacuum high-temperature roasting treatment, cooled to room temperature and acidified to obtain oxygen-deficient TiO 2 . Finally, the nitrogen-containing carbon precursor and the oxygen-deficient TiO 2 Calcining at a certain temperature under a nitrogen atmosphere can simultaneously obtain C 3 N 4 and TiO x N 2‑x visible light catalyst. C prepared by the present invention 3 N 4 and TiO x N 2‑x The catalyst has high visible light catalytic activity, and at the same time, the preparation method can reduce the pollution to the environment during the catalyst preparation process.

Description

technical field [0001] The invention belongs to the fields of inorganic chemical industry and energy environment, in particular to the technical field of photocatalytic materials in the aspects of environmental treatment and energy production, and specifically relates to the photocatalytic degradation of pollutants and the C 3 N 4 and TiO x N 2-x Synchronous preparation method of visible light catalyst. Background technique [0002] Energy and environmental issues have gradually become important issues restricting the development of contemporary society, and semiconductor photocatalysis technology is considered to be one of the effective ways to solve energy and environmental issues at the same time. Semiconductor photocatalytic technology can not only effectively degrade harmful pollutants in the environment, but also realize hydrogen production from water splitting, thereby achieving zero emission to the environment and effective utilization of clean solar energy. Howe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01J37/08C01B3/04
CPCB01J35/004B01J27/24C01B3/042B01J37/08C01B2203/0277Y02E60/36
Inventor 汪玲李雪章世深
Owner ZHEJIANG SCI-TECH UNIV