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one for co 2 Photocathode material for reduction of formic acid and preparation method thereof

A photocathode, formic acid technology, applied in catalyst activation/preparation, chemical instruments and methods, inorganic raw material man-made filaments, etc., can solve the problems of decreased electron reduction ability, disadvantage, narrow scope of action, etc.

Active Publication Date: 2022-03-11
TAIZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the disadvantages of this type of modification are that the built-in electric field of the type II heterojunction has a narrow range of action, the separation efficiency of photogenerated charges is limited, and the electron reduction ability after separation is reduced, which is not conducive to reducing the overpotential of the reaction; in addition , due to the lack of reduced CO 2 catalytic sites, a single type II heterojunction is difficult to effectively activate CO 2 Molecules, non-selective for multiple reaction pathways at the interface

Method used

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  • one for co <sub>2</sub> Photocathode material for reduction of formic acid and preparation method thereof
  • one for co <sub>2</sub> Photocathode material for reduction of formic acid and preparation method thereof

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preparation example Construction

[0028] The present invention provides a method for CO 2 A method for preparing a photocathode material for reducing formic acid, comprising the following steps;

[0029] mixing bismuth nitrate, ferric nitrate, citric acid, water and polyvinylpyrrolidone to obtain a spinning solution;

[0030] The polyvinyl alcohol aqueous solution is spin-coated onto the FTO surface to obtain a spinning substrate;

[0031] performing electrospinning on the surface of the spinning substrate by using the spinning solution to obtain three-dimensional nanofibers;

[0032] The three-dimensional nanofibers were calcined to obtain BiFeO 3 Nanofiber photoelectrodes;

[0033] With the BiFeO 3 The nanofiber optoelectronic electrode is used as the substrate, and ZnTe is used as the evaporation source to conduct evaporation coating to obtain ZnTe-loaded BiFeO 3 electrode;

[0034] BiCl3 , thioacetamide and dimethylformamide were mixed, and the ZnTe-supported BiFeO 3 The electrode is subjected to hy...

Embodiment 1

[0056] Weigh 0.78g of bismuth nitrate, 0.48g of ferric nitrate and 0.1g of citric acid respectively, add them into 10mL of deionized water, and stir to dissolve. Then 0.6 g of polyvinylpyrrolidone was added and stirred overnight to obtain a spinning solution. The FTO glass was fixed on the drum of the electrospinning device, and the aqueous solution of polyvinyl alcohol was spin-coated on the FTO surface before spinning to enhance the adhesion of FTO. Pour the spinning solution into the syringe, and set the parameters of the electrospinning process: the spinning voltage is 20kV, the drum speed is 150r / min, and the propulsion speed is 2mm / h, and three-dimensional nanofibers are obtained. Subsequently, the fiber was taken out and placed in a muffle furnace at 700°C for calcination for 5 hours to obtain BiFeO 3 nanofiber photoelectrode; the above BiFeO 3 The nanofiber photoelectrode is fixed on the substrate of the thermal evaporation coating machine, with ZnTe as the evaporati...

Embodiment 2

[0062] Weigh 1.17g of bismuth nitrate, 0.72g of ferric nitrate and 0.2g of citric acid respectively, add them into 10mL of deionized water, and stir to dissolve. Then 0.8 g of polyvinylpyrrolidone was added and stirred overnight to obtain a spinning solution. The FTO glass was fixed on the drum of the electrospinning device, and the aqueous solution of polyvinyl alcohol was spin-coated on the FTO surface before spinning to enhance the adhesion of FTO. Pour the spinning solution into the syringe, and set the parameters of the electrospinning process: spinning voltage 18kV, drum speed 200r / min, and propulsion speed 2mm / h, to obtain three-dimensional nanofibers. Subsequently, the fiber was taken out and placed in a muffle furnace at 800°C for calcination for 3 hours to obtain BiFeO3 nanofiber photoelectrode; the above BiFeO 3 The nanofiber photoelectrode is fixed on the substrate of the thermal evaporation coating machine, with ZnTe as the evaporation source, the vacuum in the c...

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Abstract

The present invention provides a kind of CO 2 Restore the lighting pole material and its preparation methods, which belongs to the field of optical electrode material technology.The invention builds Bifeo through the dual modification strategy of "iron electrode" and "interface water activation" 3 / ZNTE / BItS composite light, via Bifeo 3 The charge driving force of the polarized electric field, H in the BI‑S interface 2 O, CO 2 Adsorbing activation ability and optoelectronic synergy to maximize the efficiency of ZNTE load separation and interface reaction efficiency, thereby effectively reducing the ZNTE response to the potential and increasing CO 2 Direction converts into selectivity of methic acid.

Description

technical field [0001] The invention relates to the technical field of photoelectrode materials, in particular to a CO 2 A photocathode material for the reduction of formic acid and a preparation method thereof. Background technique [0002] Extensive use of fossil energy causes CO 2 The massive emission and accumulation of greenhouse gases, the CO 2 Reducing it to carbon-based fuel or chemical raw material will help realize the sustainable development of human beings. Currently, artificial CO 2 The conversion methods mainly include high-temperature catalytic hydrogenation method, electrocatalytic reduction method, photocatalytic and photocatalytic conversion methods, etc., among which photocatalytic carrier separation efficiency is low, electrocatalytic overpotential is high, and photocatalytic combined photocatalytic The advantages of low energy consumption and high energy efficiency of electrocatalysis are beneficial to reduce the overpotential of the reaction and avo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B3/07C25B11/091B01J27/043B01J35/06B01J37/34B01J37/10D01F9/08D06M11/52D06M11/83
CPCB01J27/043B01J35/0033B01J35/004B01J35/06B01J35/023B01J37/342B01J37/10B01J37/348D01F9/08D06M11/52D06M11/83
Inventor 熊贤强张晓陈啸武承林薛红川范利亚张川群韩得满
Owner TAIZHOU UNIV
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