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a g-c 3 n 4 Quantum dots and their preparation methods and applications

A technology of g-c3n4 and quantum dots, which is applied in the field of g-C3N4 quantum dots and its preparation, can solve the problems of cumbersome and difficult quantum dot methods and low yield, and achieve the effect of simple and fast method, stable performance and high yield

Active Publication Date: 2022-07-19
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is in order to overcome preparation g-C in the prior art 3 N 4 The quantum dot method is cumbersome and difficult, and the yield is not high, and a g-C 3 N 4 Quantum dots and preparation methods thereof, the preparation method of the present invention is simple and quick, and the yield is high, and the prepared g-C is further 3 N 4 Quantum dots applied to Fe 3+ testing

Method used

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  • a g-c <sub>3</sub> n <sub>4</sub> Quantum dots and their preparation methods and applications
  • a g-c <sub>3</sub> n <sub>4</sub> Quantum dots and their preparation methods and applications
  • a g-c <sub>3</sub> n <sub>4</sub> Quantum dots and their preparation methods and applications

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preparation example Construction

[0032] Embodiments of the present invention also provide the above-mentioned g-C 3 N 4 The preparation method of quantum dots, the principle is as follows figure 1 shown, including the following steps:

[0033] 1) The bulk phase g-C 3 N 4 Put it into the quartz crucible, and then put the quartz crucible into the middle of the tube furnace;

[0034] 2) Put the quartz glass beads into the second quartz crucible and place the second quartz crucible in the bulk phase g-C 3 N 4 downwind; alternatively, put the quartz glass beads into two second quartz crucibles and place the two quartz crucibles in the bulk phase g-C 3 N 4 After the upper tuyere and the lower tuyere are installed, the tube furnace is installed;

[0035] In the present invention, the quartz glass beads are placed in the bulk phase g-C 3 N 4 On both sides of the high-temperature calcination and decomposition, the small-sized g-C 3 N 4 Quantum dots are deposited on quartz glass beads for subsequent collec...

Embodiment 1

[0047] A high yield g-C 3 N 4 A rapid preparation method of quantum dots, the preparation method comprises the following steps:

[0048] 1 Preparation of bulk g-C 3 N 4 :

[0049] Weigh 20g of melamine, put it into a quartz crucible, heat it up to 550°C in a muffle furnace for 2h, keep it warm for 2h, take it out after cooling, it is the bulk phase g-C 3 N 4 .

[0050] 2. Preparation of g-C 3 N 4 Quantum dots:

[0051] 1) Weigh 15g bulk phase g-C 3 N 4 Put into the first quartz crucible, and then put the first quartz crucible into the middle of the tube furnace;

[0052] 2) Select spherical quartz glass beads with a diameter of 2-10 mm, put the quartz glass beads into two second quartz crucibles on average, and then place the two second quartz crucibles on both sides of the tube furnace respectively (that is, the body Phase g-C 3 N 4 On both sides of the tube furnace, corresponding to the upper tuyere and the lower tuyere of the tube furnace), install the tube fu...

Embodiment 2

[0056] A high yield g-C 3 N 4 A rapid preparation method of quantum dots, the preparation method comprises the following steps:

[0057] 1 Preparation of bulk g-C 3 N 4 :

[0058] Weigh 20g of melamine, put it into a quartz crucible, heat it up to 500°C within 2h in a muffle furnace, keep it warm for 4h, take it out after cooling, it is the bulk phase g-C 3 N 4 .

[0059] 2. Preparation of g-C 3 N 4 Quantum dots:

[0060] 1) Weigh 15g bulk phase g-C 3 N 4 Put into the first quartz crucible, and then put the first quartz crucible into the middle of the tube furnace;

[0061] 2) Select spherical quartz glass beads with a diameter of 2-10 mm, put the quartz glass beads into the second quartz crucible on average, and then place the two second quartz crucibles on both sides of the tube furnace respectively (i.e. the bulk phase g-C 3 N 4 On both sides of the tube furnace, corresponding to the upper and lower tuyere vents of the tube furnace), install the tube furnace; ...

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Abstract

The present invention proposes a g-C 3 N 4 Quantum dot and preparation method thereof, comprising: 1) changing bulk phase g-C 3 N 4 Put into the first quartz crucible, and then put the first quartz crucible into the middle of the tube furnace; 2) Put the quartz glass beads into the second quartz crucible and place the second quartz crucible at the downwind or upwind of the tube furnace 3) In a flowing inert gas atmosphere, the tube furnace is heated to 620-680°C at a heating rate of 3-5°C / min for 10-20min, and then lowered at a cooling rate of 3-5°C / min To 500-550 ℃, repeat this step several times; 4) collect the attachments on the surface of the quartz glass beads, that is, get. The preparation method of the present invention is simple and quick, and has high yield, and the prepared quantum dots are further applied to Fe 3+ under detection.

Description

technical field [0001] The invention belongs to the technical field of carbon nitride materials, in particular to a g-C 3 N 4 Quantum dots and preparation methods and applications thereof. Background technique [0002] Graphitized Carbon Nitride g-C 3 N 4 Both photocatalytically produce H 2 It can also photocatalytically degrade organic pollutants, which is an ideal choice for solving energy shortage and pollution control. g-C 3 N 4 It is a stable polymer with a graphene-like layered structure, which has received extensive attention. In addition, g-C 3 N 4 The in-plane interactions between the layers in the medium are stronger than those of graphite, illustrating the g-C 3 N 4 Good chemical stability in most solvents and good visible light responsiveness under visible light radiation. Despite the above advantages, bulk g-C 3 N 4 Some disadvantages are still encountered, including low specific surface area and poor quantum yield, which are not conducive to its p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B21/082G01N21/64B82Y40/00B82Y30/00
CPCC01B21/0605G01N21/6428B82Y40/00B82Y30/00C01P2002/72C01P2004/04C01P2006/60C01P2004/64
Inventor 关荣锋池宪虎杨秀丽江楠邵荣
Owner YANCHENG INST OF TECH
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