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A near-infrared photocatalytic electrode, preparation method and application

A catalytic electrode, near-infrared light technology, applied in photosensitive equipment, photovoltaic power generation, circuits, etc., can solve the problem that semiconductors are not easily excited by near-infrared light, and achieve the effect of broadening the absorption range, good response, and low photobleaching.

Active Publication Date: 2022-07-05
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] Aiming at the above defects or improvement needs of the prior art, the present invention provides a near-infrared photocatalytic electrode, a preparation method and an application thereof. photoexcitation problem

Method used

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  • A near-infrared photocatalytic electrode, preparation method and application
  • A near-infrared photocatalytic electrode, preparation method and application
  • A near-infrared photocatalytic electrode, preparation method and application

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preparation example Construction

[0032] An embodiment of the present invention also provides a method for preparing a near-infrared photocatalytic electrode, the method comprising: mixing a semiconductor material and a lanthanide upconversion nanomaterial according to a preset mass ratio and then ultrasonically treating to obtain a photosensitive material; adding the photosensitive material to The photosensitive material dispersion is obtained in deionized water, the dispersion is applied droplets on the surface of the conductive substrate, dried and rinsed to obtain a near-infrared photocatalytic electrode.

[0033] Wherein, the preset mass ratio is that the mass of the lanthanide up-conversion nanomaterial is 5%-30% of the mass of the semiconductor material.

[0034] Specifically, the lanthanide upconversion nanomaterials are prepared by the following steps: mixing the organic solution dissolved with lanthanide salt and the organic solution dissolved with ammonium fluoride and polyethyleneimine evenly, addin...

Embodiment 1

[0039] This embodiment provides a preparation method of a near-infrared photocatalytic electrode. specifically:

[0040] S1. Synthesis of photosensitive materials:

[0041] 2 mmol LnCl 3 (Ln is Y, Yb and Er, the molar ratio is Y / Yb / Er=78 / 20 / 2) and 4 mmol of NaCl were dissolved in 30 mL of ethylene glycol. 8mmol NH 4 F and 0.8 g polyethyleneimine were dissolved in 20 mL of ethylene glycol and added to the above solution. After being mixed evenly, it was transferred into a reactor, reacted at 200°C for 2 hours, and after natural cooling, the product NaYF was obtained by centrifugation, deionized water and deionized ethanol washing. 4 :Yb, Er.

[0042] 1.82g of bismuth nitrate pentahydrate, 1.35g of sodium sulfide and 1.92g of urea were dissolved in 75mL of ethylene glycol, the above mixed solution was transferred to a reactor, reacted at 180°C for 24 hours, and after natural cooling, the mixture was centrifuged, deionized water and absolute ethanol. Washing treatment to ob...

Embodiment 2-5

[0048] The preparation method of the present embodiment 2-5 is the same as that of the embodiment 1, the difference is that the ratio of the lanthanide upconversion nanomaterial m1 to the mass m2 of the semiconductor material in the photosensitive material is different. For m1=5%m2, m1=10%m2, m1=20%m2, m1=30%m2.

[0049] Compared with the semiconductor monomer, the near-infrared photocatalytic electrode prepared by Examples 2-5 has an improved response to near-infrared light.

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Abstract

The invention belongs to the field of photocatalytic electrodes, and more specifically, the invention discloses a near-infrared photocatalytic electrode, a preparation method and an application. The near-infrared photocatalytic electrode comprises: a conductive substrate and a photosensitive material capable of responding to near-infrared light coated on the surface of the conductive substrate; the photosensitive material includes semiconductor materials and lanthanide up-conversion nanomaterials. The preparation method includes: mixing semiconductor materials and lanthanide up-conversion nanomaterials according to a preset mass ratio and then ultrasonically treating them to obtain a photosensitive material; adding the photosensitive material into deionized water to obtain a photosensitive material dispersion liquid, and applying the dispersion droplets on conductive materials The surface of the substrate was dried and rinsed to obtain a near-infrared photocatalytic electrode. The invention solves the problem that conventional semiconductors are not easily excited by near-infrared light, widens the light absorption range of the semiconductors, and increases the utilization rate of sunlight.

Description

technical field [0001] The invention belongs to the field of photocatalytic electrodes, and more particularly, relates to a near-infrared photocatalytic electrode, a preparation method and an application. Background technique [0002] Self-powered electrochemical sensor is a sensor constructed by constructing a suitable battery system to provide energy for electrochemical sensing, and using the analyte to directly or indirectly participate in the electrode reaction to cause the change of the battery output signal. Different from traditional electrochemical sensors, this self-powered energy does not require an external power supply. By collecting energy in the environment, the self-powered sensor is realized, which greatly simplifies the preparation process of the sensor and is conducive to the miniaturization and integration of the sensor. [0003] Most of the existing self-powered sensors are based on enzyme-catalyzed fuel cells. However, biological enzymes are susceptible...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/20H01G9/042H01M14/00G01N27/30
CPCH01G9/20H01G9/2022H01M14/005G01N27/30Y02E10/542
Inventor 张敬东高洁闫凯
Owner HUAZHONG UNIV OF SCI & TECH
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