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Broad spectral response g-C3N4/Ta3N5 composite photocatalytic material and preparation method and application thereof

A composite photocatalysis, g-c3n4 technology, applied in chemical instruments and methods, physical/chemical process catalysts, light water/sewage treatment, etc., can solve the problems of wide band gap and limited application, and achieve oxidation inhibition and excellent treatment , the effect of loose preparation conditions

Inactive Publication Date: 2018-05-18
ZHEJIANG RUISHENG ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although TiO 2 The photocatalytic activity is high, but its band gap is wide (about 3.2eV), and it must be excited by ultraviolet light to have catalytic activity, and ultraviolet light only accounts for about 5% of the solar spectrum, which greatly limits its practical application. Applications

Method used

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  • Broad spectral response g-C3N4/Ta3N5 composite photocatalytic material and preparation method and application thereof
  • Broad spectral response g-C3N4/Ta3N5 composite photocatalytic material and preparation method and application thereof
  • Broad spectral response g-C3N4/Ta3N5 composite photocatalytic material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A broad spectral response g-C 3 N 4 / Ta3 N 5 The preparation method of composite photocatalytic material comprises the following steps:

[0028] (1) Preparation of g-C by thermal polymerization 3 N 4

[0029] Weigh 1g of melamine into an alumina crucible and cover it, place it in a muffle furnace and heat it at a heating rate of 3°C / min, the calcination temperature is 550°C, the calcination time is 4h in air atmosphere, and naturally cool to room temperature to obtain yellow g-C 3 N 4 powder;

[0030] (2), using NH 3 Preparation of Ta by Direct Nitriding 3 N 5

[0031] Weigh 1g Ta 2 o 5 , put it into an alumina crucible, place it in a tube furnace, and continuously feed NH at a flow rate of 500mL / min 3 , heated at a heating rate of 10°C / min, the nitriding temperature was 850°C, the nitriding time was 10h, and naturally cooled to room temperature to obtain brown-red Ta 3 N 5 ;

[0032] (3), using ball milling method and in NH 3 Preparation of g-C by anne...

Embodiment 2

[0036] A broad spectral response g-C 3 N 4 / Ta 3 N 5 The preparation method of composite photocatalytic material comprises the following steps:

[0037] (1) Preparation of g-C by thermal polymerization 3 N 4

[0038] Operation process is with embodiment 1;

[0039] (2), using NH 3 Preparation of Ta by Direct Nitriding 3 N 5

[0040] Operation process is with embodiment 1;

[0041] (3), using ball milling method and in NH 3 Preparation of g-C by annealing in atmosphere 3 N 4 / Ta 3 N 5 composite photocatalytic material

[0042] Weigh the prepared 0.02g g-C 3 N 4 and 0.98g Ta 3 N 5 , add an appropriate amount of absolute ethanol, fully grind the grinding time for 1h, put the ground composite material into an alumina crucible, place it in a tube furnace, and continuously feed NH at a flow rate of 80mL / min 3 , heated at a heating rate of 10°C / min, the annealing temperature was 400°C, annealed for 2 hours, and naturally cooled to room temperature to obtain 2% g-...

Embodiment 3

[0045] A broad spectral response g-C 3 N 4 / Ta 3 N 5 The preparation method of composite photocatalytic material comprises the following steps:

[0046] (1) Preparation of g-C by thermal polymerization 3 N 4

[0047] Operation process is with embodiment 1;

[0048] (2), using NH 3 Preparation of Ta by Direct Nitriding 3 N 5

[0049] Operation process is with embodiment 1;

[0050] (3), using ball milling method and in NH 3 Preparation of g-C by annealing in atmosphere 3 N 4 / Ta 3 N 5 composite photocatalytic material

[0051] Weigh the prepared 0.03g g-C 3 N 4 and 0.97g Ta 3 N 5 , add an appropriate amount of absolute ethanol, fully grind the grinding time for 1h, put the ground composite material into an alumina crucible, place it in a tube furnace, and continuously feed NH at a flow rate of 80mL / min 3 , heated at a heating rate of 10°C / min, the annealing temperature was 400°C, annealed for 2 hours, and naturally cooled to room temperature to obtain 3% g-...

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Abstract

The invention discloses a broad spectral response g-C3N4 / Ta3N5 composite photocatalytic material and a preparation method and application thereof. Melamine and tantalum pentoxide are used as raw materials, and a novel broad spectral response g-C3N4 / Ta3N5 composite photocatalyst is obtained by combination of thermopolymerization, NH3 direct nitridation and a ball-milling method. A preparation process is simple, operation conditions are loose, repeatability is good, the prepared 2% g-C3N4 / Ta3N5 composite photocatalyst has excellent photocatalysis property, and the activity of degradation to organic pollutants in water is high.

Description

technical field [0001] The invention relates to the field of photocatalytic materials synthesized by inorganic materials, especially a wide spectral response g-C 3 N 4 / Ta 3 N 5 Composite photocatalytic material and its preparation method and application. Background technique [0002] The rapid development of organic synthesis industry has led to increasingly serious organic pollution in water bodies. Traditional adsorption, chemical oxidation, biodegradation and other methods to treat organic pollutants in water often face problems such as short regeneration cycle of adsorbent, secondary pollution of chemical agents, and large amount of microbial sludge in production. The use of photocatalytic technology to degrade organic pollutants in wastewater has attracted the attention of researchers due to the potential use of solar energy, mild reaction conditions, deep decomposition of organic matter, and low secondary pollution. The development of high-efficiency photocatalyt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C02F1/30C02F101/30
CPCC02F1/30B01J27/24C02F2101/30C02F2305/10B01J35/39
Inventor 沈娟
Owner ZHEJIANG RUISHENG ENVIRONMENTAL PROTECTION TECH CO LTD
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