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a pt/g-c 3 n 4 Composite material, electrochemical sensor and preparation method and use thereof

A composite material, g-c3n4 technology, applied in the field of Pt/g-C3N4 composite material, electrochemical sensor and its preparation, can solve the problem of no electrochemical response of phenol, and achieve good selectivity, high-efficiency electrochemical detection, high ratio The effect of large surface area

Inactive Publication Date: 2020-07-21
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, unmodified carbon paper has little electrochemical response to phenol

Method used

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  • a pt/g-c <sub>3</sub> n <sub>4</sub> Composite material, electrochemical sensor and preparation method and use thereof
  • a pt/g-c <sub>3</sub> n <sub>4</sub> Composite material, electrochemical sensor and preparation method and use thereof
  • a pt/g-c <sub>3</sub> n <sub>4</sub> Composite material, electrochemical sensor and preparation method and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Example 1Pt / g-C 3 N 4 powder preparation

[0037] 1. Preparation of Carbon Nitride

[0038]Get 4g of melamine and put it into a mortar and grind it and put it into a crucible, ensure that there is a certain gap between the crucible and the lid, and then move it into the muffle furnace. Keep the temperature in the furnace at 520°C at a heating rate of 5°C / min, and calcinate for 4 hours. After the calcination is completed, it is naturally cooled to room temperature to obtain light yellow carbon nitride powder.

[0039] 2. Pt / g-C 3 N 4 Synthesis and powder preparation of

[0040] Get 50mg, the carbon nitride (g-C 3 N 4 ) powder was dissolved in 40mL of deionized water, ultrasonicated for 30min, and then within 15min, 0.3mL of chloroplatinic acid H 2 PtCl 6 ·6H 2 O (0.01M) was slowly added dropwise into the carbon nitride suspension, and continued to sonicate for 5 minutes to obtain a mixed suspension;

[0041] 0.0645g of anhydrous sodium citrate C 6 h 5 Na 3...

Embodiment 2

[0043] 1. Preparation of Carbon Nitride

[0044] Get 4g of melamine and put it into a mortar and grind it and put it into a crucible, ensure that there is a certain gap between the crucible and the lid, and then move it into the muffle furnace. Keep the temperature in the furnace at 520°C at a heating rate of 5°C / min, and calcinate for 4 hours. After the calcination is completed, it is naturally cooled to room temperature to obtain light yellow carbon nitride powder.

[0045] 2. Pt / g-C 3 N 4 Synthesis and powder preparation of

[0046] Get 0.2mol, carbon nitride (g-C 3 N 4 ) powder was dissolved in 50mL of deionized water, ultrasonic 25min, and then 0.5mL of chloroplatinic acid solution (1mmol H 2 PtC l6 ·6H 2 O configuration ) Slowly add it dropwise into the carbon nitride suspension, and continue to sonicate for 8 minutes to obtain a mixed suspension;

[0047] 0.2mol of anhydrous sodium citrate C 6 h 5 Na 3 o 7 Dissolve in 10mL of deionized water, then add it d...

Embodiment 3

[0049] 1. Preparation of Carbon Nitride

[0050] Get 4g of melamine and put it into a mortar and grind it and put it into a crucible, ensure that there is a certain gap between the crucible and the lid, and then move it into the muffle furnace. Keep the temperature in the furnace at 520°C at a heating rate of 5°C / min, and calcinate for 4 hours. After the calcination is completed, it is naturally cooled to room temperature to obtain light yellow carbon nitride powder.

[0051] 2. Pt / g-C 3 N 4 Synthesis and powder preparation of

[0052] Get 0.8mol, carbon nitride (g-C) of particle size 1-10 μm preparation 3 N 4 ) powder was dissolved in 100mL of deionized water, ultrasonic 35min, then 1mL chloroplatinic acid solution (5mmol H 2 PtC l6 ·6H 2 O configuration) is slowly added dropwise into the carbon nitride suspension, and continues to exceed 8min to obtain a mixed suspension; 0.5mol of anhydrous sodium citrate C 6 H5Na 3 o 7 Dissolve in 10mL of deionized water, then a...

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Abstract

The invention provides a Pt / g-C3N4 composite material, an electrochemical sensor and a preparation method and an application thereof. The inventor combines Pt with g-C3N4 to form a composite materialthrough a simple synthetic method and applies the composite material as an electrode substrate material to an electrochemical sensor. The constructed electrochemical sensor can achieve electrochemicaldetection of phenol quickly, sensitively and efficiently. The composite material Pt / g-C3N4 has electrocatalytic activity to noble metal Pt. As the g-C3N4 is large in specific surface area, the Pt / g-C3N4 compound can improve the electron transfer ability in a phenol oxidizing process. The detection sensitivity to phenol is obviously improved by an electrochemical signal by means of a synergic effect of Pt and g-C3N4. Meanwhile, the Pt / g-C3N4 electrochemical sensor has no obvious responding current to chaff interferents such as ethanol, ethylene glycol, methylbenzene, acetic acid and acetone, and has good selectivity.

Description

technical field [0001] The invention relates to the field of electrochemistry, in particular to a Pt / g-C 3 N 4 Composite material, electrochemical sensor and its preparation method and application. Background technique [0002] In recent years, nanotechnology has developed rapidly. Among them, nano-noble metal materials not only have the general properties of general nanomaterials (small size effect, macroscopic quantum size effect, surface effect), but also their unique catalytic activity and photoelectric properties that can be adjusted according to actual needs. Their electromagnetic properties make them ideal materials for multiplexing assays. Carbon Nitride (g-C 3 N 4 ) is a stable metal-free semiconductor material. Due to its low cost, simple synthesis, good catalytic performance, good biocompatibility, and large specific surface area, g-C 3 N 4 It also has a wide range of applications in the fields of biosensors, degradation of pollutants in water, and carbon di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/30G01N27/48
CPCG01N27/307G01N27/308G01N27/48
Inventor 胡玉花宋旭春宋冰冰蔡开聪
Owner FUJIAN NORMAL UNIV
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