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Preparation method of Sr-doped BaTiO3/ZnTe photocathode material

A photocathode and photoelectrode technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, electrodes, etc., can solve problems such as limiting the selection of semiconductor materials, and achieve strong spontaneous polarization ability and preparation The process is simple and the effect of reducing the composite speed

Active Publication Date: 2020-06-19
TAIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Thus, the choice of semiconductor materials is greatly limited

Method used

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  • Preparation method of Sr-doped BaTiO3/ZnTe photocathode material
  • Preparation method of Sr-doped BaTiO3/ZnTe photocathode material
  • Preparation method of Sr-doped BaTiO3/ZnTe photocathode material

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Experimental program
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Effect test

Embodiment 1

[0024] A Sr-doped BaTiO 3 The preparation method of / ZnTe photocathode material, concrete steps are as follows:

[0025] Weigh 0.13g of barium acetate, 0.05g of strontium acetate and 0.17g of tetrabutyl titanate, add 2ml of acetic acid, 6ml of ethanol and 6ml of water in sequence, and stir for a certain period of time to completely dissolve the solid powder; then, add 0.4g of polyvinylpyrrolate Alkanone, stirred for 24 hours to obtain a spinning solution; pipette 7ml of spinning solution into a 10ml syringe, and set the electrospinning process parameters: syringe advancing speed 3mm / h, spinning voltage 18kV, receiving distance 8cm, drum speed 200r / min , the solidified composite fiber was received on the FTO glass fixed on the drum, dried in an oven at 150 °C overnight, and then placed in a muffle furnace at 600 °C for calcination for 2 hours, and Sr-doped BaTiO could be obtained after thermal decomposition 3 Thin film electrode; prepare 30ml of mixed water with a concentration...

Embodiment 2

[0028]Weigh 0.13g of barium acetate, 0.02g of strontium acetate and 0.17g of tetrabutyl titanate, add 2ml of acetic acid, 6ml of ethanol and 6ml of water in sequence, and stir for a certain period of time to completely dissolve the solid powder; then, add 0.35g of polyvinylpyrrolate Alkanone, stirred for 24 hours to obtain a spinning solution; pipette 7ml spinning solution into a 10ml syringe, set the electrospinning process parameters: injector advance speed 3mm / h, spinning voltage 12kV, receiving distance 10cm, drum speed 300r / min , the solidified composite fiber was received on the FTO glass fixed on the drum, dried in an oven at 150°C overnight, and then placed in a muffle furnace at 650°C for calcination for 2 hours, and Sr-doped BaTiO could be obtained after thermal decomposition 3 Thin film electrode; prepare 30ml of mixed water with a concentration of 4mmol / L zinc nitrate, 4mmol / L sodium tellurate and 0.5mmol / L sodium borohydride to dissolve, stir evenly, and transfer t...

Embodiment 3

[0031] Weigh 0.13g of barium acetate, 0.08g of strontium acetate and 0.17g of tetrabutyl titanate, add 2ml of acetic acid, 8ml of ethanol and 8ml of water in sequence, and stir for a certain period of time to completely dissolve the solid powder; then, add 0.5g of polyvinyl pyrrole Alkanone, stirred for 24 hours to obtain a spinning solution; pipette 7ml of spinning solution into a 10ml syringe, and set the electrospinning process parameters: syringe advancing speed 3mm / h, spinning voltage 20kV, receiving distance 8cm, drum speed 200r / min , the solidified composite fiber was received on the FTO glass fixed on the drum, dried in an oven at 150°C overnight, and then placed in a muffle furnace at 550°C for calcination for 2 hours, and Sr-doped BaTiO could be obtained after thermal decomposition 3 Thin film electrode; prepare 30ml of mixed water with a concentration of 3.5mmol / L zinc nitrate, 3.5mmol / L sodium tellurate and 0.3mmol / L sodium borohydride to dissolve, stir evenly, tran...

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Abstract

The invention relates to a preparation method of a Sr-doped BaTiO3 / ZnTe photocathode material, and belongs to the technical field of photoelectrocatalysis. The Sr-doped BaTiO3 / ZnTe photocatalyst is composed of a Sr-doped BaTiO3 nanometer fiber core and a sheet-shaped ZnTe shell. The Sr-doped BaTiO3 is a ferroelectric material, and is synthesized through an electrostatic spinning technology. ZnTe is used as a light absorber and is prepared by a hydrothermal method. The ZnTe photo-induced charges can be induced to be selectively separated by externally applying the electric field polarized ferroelectric material, so that the aggregation of photo-induced electrons on a catalyst / solution interface is enhanced, and the photoelectrocatalytic CO2 reduction activity of ZnTe is effectively improved. The material disclosed by the invention is low in preparation cost, has relatively high activity on CO2 reduction, and has a relatively good application prospect in the field of photoelectrocatalysis.

Description

technical field [0001] The invention belongs to the technical field of photoelectric catalysis, in particular to a Sr-doped BaTiO 3 / ZnTe photocathode material preparation method, which can realize the directional separation of ZnTe photogenerated carriers and accelerate the interfacial CO 2 Reduction activity. Background technique [0002] The energy crisis and the greenhouse effect are the key scientific problems that human beings need to solve urgently. The CO2 driven by solar energy 2 Reduction provides an ideal way to solve these problems. The reaction is green, environmentally friendly and mild, and has attracted the attention of many governments and researchers. Photocatalytic reaction technology integrates the advantages of photocatalysis and electrocatalysis technology, so as to realize the reduction of CO 2 Reduction with higher efficiency and better selectivity. Currently, photocatalytic CO 2 The reduction efficiency is still very low, and the conversion effi...

Claims

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Application Information

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IPC IPC(8): C25B1/00C25B3/04C25B11/06B01J27/057B01J23/02B01J35/06C25B3/25
CPCB01J27/0576B01J23/02B01J23/002B01J2523/00C25B3/25C25B1/55C25B11/091B01J35/23B01J35/33B01J35/58B01J35/39B01J2523/23B01J2523/24B01J2523/47
Inventor 熊贤强张晓王勇武承林李江山李天丁付帅
Owner TAIZHOU UNIV
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