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an sr doping ratio 3 Preparation method of /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: 2021-03-16
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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  • an sr doping ratio <sub>3</sub> Preparation method of /znte photocathode material
  • an sr doping ratio <sub>3</sub> Preparation method of /znte photocathode material
  • an sr doping ratio <sub>3</sub> Preparation method of /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 polyvinylpyrrolidone, Stir for 24 hours to obtain the spinning solution; pipette 7ml of the spinning solution into a 10ml syringe, set the electrospinning process parameters: injector advance speed 3mm / h, spinning voltage 18kV, receiving distance 8cm, drum speed 200r / min, at a fixed Receive the cured composite fiber on the FTO glass on the drum, dry it in an oven at 150°C overnight, and place it in a muffle furnace at 600°C for calcination for 2 hours after drying. After thermal decomposition, Sr-doped BaTiO can be obtained 3 Thin film electrode; prepare 30ml of mixed water with a concentration of 5mmol / L...

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 polyvinylpyrrolidone, Stir for 24 hours to obtain the spinning solution; pipette 7ml of the 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, at a fixed Receive the cured composite fiber on the FTO glass on the drum, dry it in an oven at 150°C overnight, and place it in a muffle furnace at 650°C for calcination for 2 hours after drying. After thermal decomposition, Sr-doped BaTiO can be obtained 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 to...

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 polyvinylpyrrolidone, Stir for 24 hours to obtain the spinning solution; pipette 7ml of the spinning solution into a 10ml syringe, set the electrospinning process parameters: injector advance speed 3mm / h, spinning voltage 20kV, receiving distance 8cm, drum speed 200r / min, at a fixed Receive the cured composite fiber on the FTO glass on the drum, dry it in an oven at 150°C overnight, and place it in a muffle furnace at 550°C for calcination for 2 hours after drying. After thermal decomposition, Sr-doped BaTiO can be obtained 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, transfer to ...

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Abstract

The invention relates to a Sr-doped BaTiO 3 The invention relates to a preparation method of a ZnTe photocathode material, which belongs to the technical field of photoelectric catalysis. The Sr-doped BaTiO 3 / ZnTe photocatalyst composed of Sr-doped BaTiO 3 It consists of a nanofibrous core and a flaky ZnTe shell. Among them, Sr-doped BaTiO 3 It is a ferroelectric material synthesized by electrospinning technology. ZnTe, as a light absorber, is prepared by hydrothermal method. The ferroelectric material can be polarized by an external electric field, which can induce the selective separation of ZnTe photogenerated charges, enhance the aggregation of photogenerated electrons at the catalyst / solution interface, and effectively improve the photoelectrocatalytic CO2 performance of ZnTe. 2 Reducing activity. The material of the present invention has low production cost, and is effective for CO 2 Reduction has high activity and has good application prospects 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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Patent Type & Authority Patents(China)
IPC IPC(8): C25B1/55C25B1/23C25B3/26C25B3/21C25B11/091B01J27/057B01J23/02B01J35/06C25B3/25
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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