Na < + > doped g-C3N4 composite material, electrochemical sensor as well as preparation method and application of same

A composite material, g-c3n4 technology, applied in the field of electrochemical sensors and its preparation, Na+ doped g-C3N4 composite materials, can solve the problems of inability to store charges on the hydrophobic surface and low surface utilization, and achieve high-efficiency electrochemical detection , Easy to operate, the effect of electrochemical signal enhancement

Active Publication Date: 2019-10-18
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the low surface utilization of carbon paper and the inability to store charges on the hydrophobic surface, carbon paper itself cannot be directly used as a sensor material, so it is necessary to improve the three-dimensional structure of carbon paper, or Introduce suitable materials on the surface

Method used

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  • Na &lt; + &gt; doped g-C3N4 composite material, electrochemical sensor as well as preparation method and application of same
  • Na &lt; + &gt; doped g-C3N4 composite material, electrochemical sensor as well as preparation method and application of same
  • Na &lt; + &gt; doped g-C3N4 composite material, electrochemical sensor as well as preparation method and application of same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Weigh 60mg of g-C 3 N 4 The powder was dispersed in 80 mL of deionized water, 15 mL of 4M NaOH solution was added dropwise thereto, and the resulting mixture was kept stirring at room temperature for 24 h. After the reaction, wash with deionized water and collect Na + doped g-C 3 N 4 product, and finally put the product into an electric blast drying oven to dry to obtain Na + doped g-C 3 N 4 Powder, recorded as NC-15.

Embodiment 2

[0029] Weigh 60mg of g-C 3 N 4 The powder was dispersed in 80 mL of deionized water, then 20 mL of 4M NaOH solution was added dropwise thereto, and the resulting mixture was placed at room temperature and stirred continuously for 24 h. After the reaction, wash with deionized water and collect Na + doped g-C 3 N 4 product, and finally put the product into an electric blast drying oven to dry to obtain Na + doped g-C 3 N 4 Powder, recorded as NC-20.

Embodiment 3

[0031]Weigh 60mg of g-C 3 N 4 The powder was dispersed in 80 mL of deionized water, and then 25 mL of 4M NaOH solution was added dropwise thereto, and the resulting mixture was placed at room temperature and stirred continuously for 24 h. After the reaction, wash with deionized water and collect Na + doped g-C 3 N 4 product, and finally put the product into an electric blast drying oven to dry to obtain Na + doped g-C 3 N 4 Powder, recorded as NC-25.

[0032] Na + doped g-C 3 N 4 Performance Testing:

[0033] 1. Analysis of Na + doped g-C 3 N 4 Morphological characteristics of composite materials:

[0034] figure 1 for Na + doped g-C 3 N 4 Scanning transmission electron microscope (SEM) image; From the morphology and structure of SEM, it can be clearly seen that Na + doped g-C 3 N 4 The powder presents an irregular massive structure, about 2–6 μm.

[0035] figure 2 for Na + doped g-C 3 N 4 The transmission electron microscope (TEM) picture; It can be...

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Abstract

The inventor provides a Na < + > doped g-C3N4 composite material, a chemical sensor as well as a preparation method and application of the same. The preparation method comprises the following steps: adding g-c3N4 powder into deionized water, carrying out ultrasonic treatment for 50-70 min, and obtaining a first turbid liquid; adding a NaOH solution into the first turbid liquid, and continuously stirring for 22-25 hours at room temperature, thus obtaining a second turbid liquid; carrying out solid-liquid separation on the second turbid liquid, washing precipitate with the deionized water, and drying the precipitate to obtain Na < + > doped g- C3N4 powder. In the invention, the N<+> doped g-C3N4 electrochemical sensor is formed; under the optimal experiment condition, the range of the detectable phenol concentration of the electrochemical sensor is 1-110 [mu] M, the lowest detection limit concentration is 0.03 [mu] M (S / N = 3), and the sensitivity is 1.029 [mu] A [mu] M <-1>.

Description

technical field [0001] The invention relates to the field of electrochemistry, in particular to a Na + doped g-C 3 N 4 Composite material, electrochemical sensor and its preparation method and application. Background technique [0002] In recent years, phenolic substances are often used as fungicides, insecticides, herbicides and synthetic intermediates of dyes, etc., and are widely used in many fields. Although it has a wide range of uses, phenol is toxic, and when discharged into the environment, this toxicity is difficult to be degraded by microorganisms, which will bring certain harm to the ecosystem and eventually pose a threat to people's health. Therefore, the quantitative detection of phenol is particularly important. So far, many analytical methods, such as gas chromatography, high performance liquid chromatography, spectrophotometry and capillary electrophoresis, have been used to detect phenol. Among the many methods for detecting phenol, the electrochemical ...

Claims

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Application Information

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IPC IPC(8): G01N27/30G01N27/48C01B21/082
CPCC01B21/0605G01N27/308G01N27/48
Inventor 宋旭春宋冰冰黄宗益杨唐
Owner FUJIAN NORMAL UNIV
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