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a c 3 no 4 Preparation method of nanowire

A C3N4 and nanowire technology, applied in the field of preparation of C3N4 nanowires, can solve problems such as weak oxidation ability, and achieve the effects of short reaction time, improved yield, and ideal spacing.

Active Publication Date: 2019-08-23
JIANGSU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But its oxidizing ability is better than that of TiO 2 Weak, in addition, the electron-hole pair separation rate in the photocatalytic process needs to be further improved

Method used

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  • a c <sub>3</sub> no <sub>4</sub> Preparation method of nanowire
  • a c <sub>3</sub> no <sub>4</sub> Preparation method of nanowire

Examples

Experimental program
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Effect test

Embodiment 1

[0017] Grind and mix 5 g of melamine precursor and 1 g of sodium hydroxide in a crucible, place in a muffle furnace and heat up to 500 °C for 2 h at 5 °C / min, add 10 mL of deionized water after cooling down, filter, wash with water, and dry. i.e. get C 3 N 4 Nanowires.

[0018] In order to test the C prepared in this example 3 N 4 The photocatalytic properties of nanowires were tested for photocatalytic degradation of methylene blue: the photocatalytic reaction was carried out in a cylindrical glass reactor, with a 300W xenon lamp as the light source, and the light source was 20cm away from the liquid surface; magnetic stirring was added below the reaction vessel to make The solution is fully mixed to keep the concentration and temperature uniform. Catalyst C 3 N 4 The amount of nanowires was 1g / L, and the initial concentration of methylene blue was 20mg / L. After 1h, the photocatalytic degradation rate of methylene blue reached 84.56%.

Embodiment 2

[0020] Grind and mix 5g of melamine precursor and 5g of potassium hydroxide in a crucible, place it in a muffle furnace and heat up to 520°C at 10°C / min for 2.5h, then add 10mL of deionized water after cooling down, then filter, wash with water, and dry , that is, get C 3 N 4 Nanowires, the photocatalytic degradation rate of methylene blue reached 85.67%.

Embodiment 3

[0022] Mix 5g of melamine precursor and 2g of sodium oxide in a crucible, place it in a muffle furnace and heat up to 500°C at 4°C / min for 2.5h, then add 10mL of deionized water after cooling down, then filter, wash with water, and dry. get C 3 N 4 Nanowires, the photocatalytic degradation rate of methylene blue reached 86.56%.

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Abstract

The invention discloses a C 3 N 4 The preparation method of nanowires is to mix the nitrogen-rich precursor with salt or sodium oxide and calcinate at high temperature, then wash with water, filter and dry to obtain C 3 N 4 Nanowires. It is also possible to add photosensitizer and graphene powder to the water during washing, avoid light and ultrasonically shake for 30min-90min, and then centrifuge at 2000-2800rpm for 12-20min; Through high temperature calcination and washing method, C 3 N 4 nanowires, the preparation process is simple, the reaction time is short, the process is environmentally friendly, the repeatability is good, and it is easy for industrial production. The prepared C 3 N 4 Nanowires have a large specific surface area, photocatalytic activity as high as 86.56%, and C 3 N 4 The shape and size of the nanowires are uniform and repeatable.

Description

technical field [0001] The invention belongs to the technical field of material preparation and photocatalysis, and specifically relates to a C 3 N 4 Methods of preparing nanowires. Background technique [0002] Semiconductor photocatalysts have attracted much attention in the past few decades. Because it is widely used in direct hydrolysis to obtain renewable energy hydrogen and environmental protection of organic polluted wastewater. [0003] Among many semiconductors, TiO 2 Due to its non-toxicity, low cost, high stability and excellent photocatalytic ability, it has become the most researched and most promising semiconductor material. However, due to its large energy gap (such as anatase TiO 2 3.2eV), can only use the ultraviolet (UV) part that accounts for 3% to 4% of sunlight, and the quantum efficiency is low, thus limiting the TiO 2 Applications. Therefore, methods such as doping, metal deposition, and preparation of composite materials have been applied to T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B21/082
Inventor 张春勇文颖频程洁红赵德建舒莉秦恒飞刘维桥周月郑纯智张国华周全法
Owner JIANGSU UNIV OF TECH
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