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an au/ceo 2 /g-c 3 no 4 Composite material, electrochemical sensor, preparation method and application thereof

A composite material, g-c3n4 technology, applied in the field of electrochemical sensor and its preparation, Au/CeO2/g-C3N4 composite material, can solve ecological problems and other problems, achieve low cost, enhanced electrochemical signal, and simple preparation method Effect

Inactive Publication Date: 2020-08-18
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, phenol also has strong chemical stability and the ability to resist microbial degradation. Once discharged into the environment, it will cause serious ecological problems.

Method used

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  • an au/ceo <sub>2</sub> /g-c <sub>3</sub> no <sub>4</sub> Composite material, electrochemical sensor, preparation method and application thereof
  • an au/ceo <sub>2</sub> /g-c <sub>3</sub> no <sub>4</sub> Composite material, electrochemical sensor, preparation method and application thereof
  • an au/ceo <sub>2</sub> /g-c <sub>3</sub> no <sub>4</sub> Composite material, electrochemical sensor, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1 Au / CeO 2 / g -C 3 N 4 Composite material preparation

[0033] Preparation of the first suspension: 0.76 mmol of g-C 3 N 4 The powder was added to 20ml deionized water, and ultrasonicated for 60 minutes to obtain the first suspension;

[0034] Cerium nitrate solution preparation: 0.24mmol of Ce(NO 3 ) 3 6H 2 O is dissolved in the deionized water of 100ml, obtains cerium nitrate solution;

[0035] Au / CeO 2 / g -C 3 N 4 Suspension preparation: under continuous ultrasonic conditions, add cerium nitrate solution to the first suspension to obtain the second suspension; adjust the pH value of the second suspension to 9.0 with NaOH (0.1mol / L), continue Sonicate for 24 hours, then add 4 ml of 7.0 mmol / L HAuCl to the second suspension 4 solution, after stirring for 6 hours with a magnetic stirrer, Au / CeO 2 / g -C 3 N 4 The third suspension;

[0036] Separation and drying: The third suspension is subjected to solid-liquid separation, the precipitate is washe...

Embodiment 2

[0037] Example 2 Au / CeO 2 / g -C 3 N 4 Composite material preparation

[0038] Preparation of the first suspension: 0.65 mmol of g-C 3 N 4 The powder was added to 20ml deionized water, and ultrasonicated for 60 minutes to obtain the first suspension;

[0039] Cerium nitrate solution preparation: 0.2mmol of Ce(NO 3 ) 3 6H 2 O is dissolved in the deionized water of 100ml, obtains cerium nitrate solution;

[0040] Au / CeO 2 / g -C 3 N 4 Suspension preparation: under continuous ultrasonic conditions, add cerium nitrate solution to the first suspension to obtain the second suspension; adjust the pH value of the second suspension to 8.8 with NaOH (0.1mol / L), continue Sonicate for 22 hours, then add 4 ml of 6.0 mmol / L HAuCl to the second suspension 4 solution, after stirring for 5 hours with a magnetic stirrer, Au / CeO 2 / g -C 3 N 4 The third suspension;

[0041] Separation and drying: The third suspension is subjected to solid-liquid separation, the precipitate is washed...

Embodiment 3

[0042] Example 3 Au / CeO 2 / g -C 3 N 4 Composite material preparation

[0043] Preparation of the first suspension: 0.87 mmol of g-C 3 N 4 The powder was added to 20ml deionized water, and ultrasonicated for 60 minutes to obtain the first suspension;

[0044] Cerium nitrate solution preparation: 0.28mmol of Ce(NO 3 ) 3 6H 2 O is dissolved in the deionized water of 100ml, obtains cerium nitrate solution;

[0045] Au / CeO 2 / g -C 3 N 4 Suspension preparation: under continuous ultrasonic conditions, add cerium nitrate solution to the first suspension to obtain the second suspension; adjust the pH value of the second suspension to 9.2 with NaOH (0.1mol / L), continue Sonicate for 25 hours, then add 4 ml of 8.0 mmol / L HAuCl to the second suspension 4 solution, after stirring for 7 hours with a magnetic stirrer, Au / CeO 2 / g -C 3 N 4 The third suspension;

[0046] Separation and drying: The third suspension is subjected to solid-liquid separation, the precipitate is washe...

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Abstract

The inventor provides an Au / CeO2 / g-C3N4 composite material, an electrochemical sensor and a preparation method and an application thereof. A simple synthesis method includes combining Au and CeO2 withg-C3N4 to form the composite material, and taking the composite material as an electrode base bottom material to construct the electrochemical sensor. A synergistic effect of Au / CeO2 / g-C3N4 obviouslyenhances an electrochemical signal, and can realize rapid, sensitive and efficient electrochemical detection of phenol. The preparation method is simple, easy to operate and low in cost; and meanwhile, the method has no obvious response current to interferences of ethanol, ethylene glycol, toluene, acetic acid and acetone, and has good selectivity.

Description

technical field [0001] The present invention relates to the field of electrochemistry, in particular to a kind of Au / CeO 2 / g -C 3 N 4 Composite material, electrochemical sensor and its preparation method and application. Background technique [0002] With the rapid development of industrialization, global pollution problems have attracted the attention of people from all walks of life, especially some toxic and harmful organic pollutants. As an important industrial synthesis intermediate, phenol is widely used in many fields, such as petroleum, organic pesticides, etc. Phenol has a strong penetrating ability, even at a very low concentration level, it can quickly flow into the water environment. In addition, phenol also has strong chemical stability and the ability to resist microbial degradation. Once discharged into the environment, it will cause serious ecological problems. Through the food chain, most of the phenol will accumulate in the human body, and pose a cert...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/26G01N27/48
CPCG01N27/26G01N27/48
Inventor 宋旭春宋冰冰蔡开聪
Owner FUJIAN NORMAL UNIV
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