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Preparation method for co-modified copper bismuthate nanorod photocathodes

A photocathode and nanorod technology, which is applied in the manufacture of light-emitting cathodes, nanotechnology, nanotechnology, etc., can solve problems such as incomparability, and achieve good photocatalytic activity, visible light response characteristics, and improved stability.

Active Publication Date: 2019-02-05
WENZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • Preparation method for co-modified copper bismuthate nanorod photocathodes
  • Preparation method for co-modified copper bismuthate nanorod photocathodes
  • Preparation method for co-modified copper bismuthate nanorod photocathodes

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Embodiment 1

[0034] This embodiment provides a method for preparing a co-modified copper bismuthate nanorod photocathode, comprising the following steps:

[0035] Step S1, 2.42g Bi(NO 3 ) 3 ·5H 2 O, 0.6g Cu(NO 3 ) 3 ·5H 2 O and 0.87g NaOH were added to 40mL deionized water successively, stirred for 3 hours and dissolved to obtain a solution;

[0036] Step S2, transfer the solution obtained in step S1 to a polytetrafluoroethylene-lined autoclave, and react at 180°C for 24 hours. After the reaction, the autoclave is cooled to room temperature, and the solid product in the solution is centrifuged , washed alternately with absolute ethanol and high-purity water three times each, and then dried in a drying oven at 60°C to obtain CuBi 2 o 4 Nano stave;

[0037] Step S3, weighing 30mg of CuBi prepared in step S2 2 o 4 Nanorods were added to 10 mL of absolute ethanol, followed by different volumes of 0.05M AgNO 3 solution, stirred for 3 hours to adsorption equilibrium, and dried in a dr...

Embodiment 2

[0055] In this embodiment, nitrogen-doped carbon quantum dots prepared in Example 1 and silver co-modify CuBi 2 o 4 The nanorod photocathode was tested for photocatalytic performance, and the test conditions were as follows: a standard three-electrode system was used, and a saturated calomel electrode and a Pt wire electrode were used as the reference electrode and the counter electrode, respectively. AM 1.5 solar simulator (100mW / cm 2 ) as the lighting source. Take 85mL of 0.5ML phosphate buffer solution in the photoelectric reaction cell, the distance between the light source and the reaction system is 10cm, and the irradiation distance from the front is 0.5cm 2 of the electrolyte exposed area of ​​the working electrode. The potential range is -0.6-0.5V, and the scanning speed is 10mV˙s -1 . Electrode potential adopts RHE standard, E (RHE) =E (SCE) +0.059*6.6+0.242.

[0056] From Figure 8 Analysis of the photoelectric performance graph results shown, compared with ...

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Abstract

The invention discloses a preparation method for co-modified copper bismuthate nanorod photocathodes. The preparation method includes the following steps: (1) performing hydro-thermal synthesis of a CuBi2O4 nanorod under an alkaline condition by utilizing abundant and cheap bismuth sources and copper sources; (2) loading silver ions on the CuBi2O4 nanorod by adopting an ion alternating physical adsorption method; (3) taking FTO conductive glass as a substrate, forming a CuBi2O4 / Ag film by adopting a drop-coating method, and performing annealing processing through a CVD method; and (4) peelinga material by adopting a particle transfer technology to transfer to second FTO glass, performing ultrasonic processing, and preparing a nitrogen doped carbon quantum dot and sliver co-modified CuBi2O4 nanorod photocathode through the physical adsorption of nitrogen-doped carbon quantum dots. The photocathode prepared through the method can show good photo-electrocatalytic activity and visible light response characteristics under visible light, and stability can be improved, so that the preparation method can be effectively applied to the field of photo-electrocatalytic water decomposition forhydrogen production.

Description

technical field [0001] The invention relates to the technical field of photoelectric materials, in particular to a nitrogen-doped carbon quantum dot and silver co-modified CuBi 2 o 4 Preparation method of nanorod photocathode. Background technique [0002] Environmental pollution and energy crisis have become inevitable threats to human development, and there is an urgent need to find green and sustainable alternative energy sources. Titanium dioxide (TiO2) was discovered by Honda and Fujishima in 1972 2 ) photoelectrode for hydrogen production in photoelectrochemical cells (PEC), the use of water as a source of hydrogen generation through decomposition makes it a focus material for energy sustainability, especially photo-PEC water splitting can efficiently convert solar energy into sustainable Green energy - hydrogen, has been recognized as an effective way to solve environmental pollution and crises. Nevertheless, TiO 2 The wide energy gap (3.2eV) of the solar cell al...

Claims

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Application Information

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IPC IPC(8): H01J9/12C01G29/00B82Y30/00
CPCB82Y30/00C01G29/00C01P2002/72C01P2002/82C01P2002/84C01P2004/03C01P2004/10C01P2004/61C01P2004/62C01P2006/40H01J9/12
Inventor 马德琨马春艳余文缘黄少铭
Owner WENZHOU UNIVERSITY
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