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A Visible Light Excited Nano-Cds/Tio2 Enhanced Ascorbic Acid/Glucose Fuel Cell

A fuel cell and ascorbic acid technology, applied in biochemical fuel cells, battery electrodes, circuits, etc., can solve the problems of being easily poisoned, expensive, and difficult to achieve large-scale commercial applications, and achieve high photocatalytic activity and simple production.

Inactive Publication Date: 2018-07-31
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the commonly used noble metal catalysts have high catalytic activity for glucose, they are expensive and easily poisoned, so it is difficult to achieve large-scale commercial application
Titanium dioxide (TiO 2 ) has strong catalytic activity to glucose under alkaline conditions, but it is difficult to realize the catalytic oxidation of glucose under neutral conditions, and because nano-TiO 2 Its forbidden band width is large, and it mainly absorbs ultraviolet light, and ultraviolet light only accounts for about 3% of sunlight. Therefore, it is necessary to widen the wavelength range of its light absorption, and it is hoped that it can catalyze glucose under visible light radiation in a neutral environment. oxidation

Method used

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  • A Visible Light Excited Nano-Cds/Tio2 Enhanced Ascorbic Acid/Glucose Fuel Cell
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  • A Visible Light Excited Nano-Cds/Tio2 Enhanced Ascorbic Acid/Glucose Fuel Cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1 Construction of visible light excited nanometer CdS / TiO 2 Enhanced ascorbic acid / glucose fuel cell

[0024] The CdS / TiO of this embodiment 2 The electrode is prepared by the following method:

[0025] (1) Immerse the indium tin oxide conductive glass (substrate) into the prepared TiO 2 After the sol is pulled at a certain speed, the sol is attached to the substrate, and then the electrode is placed in an oven and dried at a constant temperature for 12 hours to obtain TiO 2 electrode.

[0026] (2) Using cyclic voltammetry electrodeposition technology, in the three-electrode system, the working electrode is TiO 2 Electrode, counter electrode is titanium electrode, reference electrode is saturated calomel electrode, electrolyte is 0.01mol / L cadmium chloride, 0.01mol / L sodium thiosulfate solution with pH=2.0, the potential range of deposition is -0.3V ~-0.9V, the number of scanning circles is 100 circles, and the scanning speed is 0.05V s -1 ;

[0027] (3) ...

Embodiment 2

[0030] Example 2 Photocatalytic oxidation of glucose and ascorbic acid

[0031] CdS / TiO in the photocatalytic fuel cell constructed in Example 1 2 Electrode ascorbic acid and ascorbic acid promote the photocatalysis of glucose, the specific operation steps are as follows:

[0032] CdS / TiO made with embodiment 1 2 The electrode is used as the photoanode, and the carbon felt is used as the cathode. A resistance box and a voltmeter are connected between the anode and the cathode of the photocatalytic fuel cell, and the measurement and calculation of sodium sulfite / sodium sulfide (1) and glucose (2) under light / dark conditions within 300s , ascorbic acid (3) and glucose / ascorbic acid (4) as a function of time for elucidating the CdS / TiO 2 Electrode ascorbic acid and ascorbic acid promotes the photocatalysis of glucose while turning the photoanode into TiO 2 Electrode, measure and calculate the current change curve (5) in glucose / ascorbic acid under light / dark conditions within ...

Embodiment 3

[0034] Example 3 Visible light excited nanometer CdS / TiO 2 Enhancing Ascorbic Acid / Glucose Fuel Cell Performance

[0035] To the test of the photocatalytic fuel cell performance that embodiment 1 builds, concrete operation steps are as follows:

[0036] Adjust the resistance value of the resistance box connected between the anode and the cathode of the photocatalytic fuel cell, measure and calculate the current density of the photocatalytic fuel cell ( figure 2 ) and power density ( image 3 ) as a function of voltage.

[0037] At 0.18mW·cm -2 Under visible light radiation, the short-circuit current shown in curve 1 is 7.4μA·cm -2 , with an open circuit potential of 0.4V and a maximum power of 1.6μW cm at 0.3V -2 ; After adding the sacrificial agent, the short-circuit current shown in curve 2 is 34.1μA·cm -2 , with an open circuit potential of 0.5V and a maximum power of 4.0 μW cm at 0.3V -2 , the addition of the sacrificial agent increases the maximum power of the bat...

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Abstract

The invention belongs to the field of a photocatalysis fuel cell, and discloses a visible-light-excited nano CdS / TiO<2> enhanced ascorbic acid / glucose fuel cell. The nano CdS modified TiO<2> electrode is used as the photo-anode; the ascorbic acid is enhanced by the CdS / TiO<2> electrode under the visible light to promote the photocatalysis and oxidization of glucose, so that photocatalysis and oxidization for the glucose is realized by a low-cost non-enzyme catalyst under visible light radiation in a neutral environment; and the photocatalysis fuel cell is developed on the basis; and under the visible light excitation, the highest power of the cell can reach 35.6[mu]W.cm<-2>, the short-circuit current reaches 568.2[mu]A.cm<-2>, and the photoelectric conversion efficiency is 10.3%. The method disclosed by the invention has the advantages of low cost, capability of taking materials in a biological body as the fuel, high power of the cell, and the like.

Description

technical field [0001] The invention belongs to the field of photocatalytic fuel cells, in particular to a visible light excited nanometer CdS / TiO 2 Enhanced ascorbic acid / glucose fuel cells. Background technique [0002] Glucose is an important carbohydrate in animals and plants, an energy source for living cells and an intermediate product of metabolism. However, the oxidation ability of glucose is weak, and it is often necessary to use a certain catalyst to catalyze its oxidation. The substances currently used for the catalytic oxidation of glucose mainly include enzymes and non-enzyme catalysts. [0003] The glucose oxidase catalytic oxidation method has the advantages of high selectivity and mild reaction conditions, but the enzyme catalyst is easily deactivated and the production cost is high. It is hoped to realize the catalytic oxidation of glucose by non-enzymatic catalysts. Non-enzymatic catalysts mainly include metals, metal oxides and metal complexes. Althoug...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/86H01M8/16
CPCH01M4/8647H01M8/16Y02E60/50
Inventor 梁兴煇刘俊辰李红
Owner SOUTH CHINA NORMAL UNIVERSITY