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A kind of bi-bioi/tna composite material and its application

A composite material, reactor technology, applied in the direction of electrolytic coating, surface reaction electrolytic coating, energy input, etc., can solve the problems affecting the chemical stability of BiOI, instability limit, poor conductivity, etc., and achieve good photoelectrochemical performance. , avoid exchange, high stability effect

Active Publication Date: 2020-05-01
JIANGXI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, due to the poor conductivity of BiOI and the release of I in aqueous solution - The resulting instability greatly limits the stability and application of BiOI / TNA
In order to improve its conductivity, the method of noble metal deposition is commonly used, which shows good results, but the cost is high
In addition, Cl present in seawater - Isoanions can be compared with I - The exchange will also affect the chemical stability of BiOI

Method used

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  • A kind of bi-bioi/tna composite material and its application
  • A kind of bi-bioi/tna composite material and its application
  • A kind of bi-bioi/tna composite material and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Preparation of S1 and TNA

[0040] The preparation of TNA adopts two-step anodic oxidation method, and the specific steps are as follows:

[0041] 1. Pretreatment: Cut the 0.1mm titanium sheet into small pieces of 50mm×30mm, polish it with sandpaper until there are no obvious scratches on the surface, ultrasonically clean it in ethanol, acetone and distilled water for 10 minutes each, and HF, concentrated HNO 3 Prepare a chemical polishing solution with distilled water at a volume ratio of 1:4:5, soak the titanium sheet in the polishing solution until no obvious bubbles are produced, and finally wash it with deionized water and dry it for later use;

[0042] 2. Preparation of TNA by two-step anodic oxidation method: prepare NH with a mass fraction of 0.5% 4The ethylene glycol-water solution of F is used as the electrolyte, the volume ratio of ethylene glycol and water is 49:1, the titanium sheet is used as the anode, and the platinum sheet is used as the cathode for an...

Embodiment 2

[0048] The difference with embodiment 1 is:

[0049] S3. Preparation of Bi-BiOI / TNA

[0050] Dissolve 8 mmol of glucose in 40 mL of ethylene glycol and transfer it to a 50 mL autoclave with a polytetrafluoroethylene liner. The BiOI / TNA sample is leaned against the inner wall of the autoclave at a certain angle, and the 2 / 3 of it was submerged in the glucose solution, heated at 140°C for 1 hour, and cooled naturally to room temperature after completion. The prepared BiOI / TNA samples were taken out and washed alternately with ethanol and water three times respectively, and dried overnight in an oven at 80°C.

Embodiment 3

[0052] The difference with embodiment 1 is:

[0053] S3. Preparation of Bi-BiOI / TNA

[0054] Dissolve 8 mmol of glucose in 40 mL of ethylene glycol and transfer it to a 50 mL autoclave with a polytetrafluoroethylene liner. The BiOI / TNA sample is leaned against the inner wall of the autoclave at a certain angle, and the 2 / 3 of it was submerged in the glucose solution, heated at 180°C for 1 hour, and naturally cooled to room temperature after completion. The prepared BiOI / TNA samples were taken out and washed alternately with ethanol and water three times respectively, and dried overnight in an oven at 80°C.

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Abstract

The invention discloses a Bi-BiOI / TNA composite material and an application thereof. BiOI microspheres are settled on anodized TNA through a solvothermal method, and in-situ reduction by using a secondary solvothermal method with glucose as a reducing agent is carried out to obtain a Bi-BiOI shell-core structure; the composite material, serving as a photoanode, shows high photoelectrochemical performance and good stability, and shows superior performance to BiOI / TNA and TNA in studies of PEC seawater decomposition hydrogen production under simulated sunlight in an H-type reactor.

Description

technical field [0001] The invention relates to a Bi-BiOI / TNA composite material and its application, belonging to the field of composite photoanode materials. Background technique [0002] Hydrogen production by photoelectrochemical (PEC) hydrolysis of seawater plays a very important role in energy regeneration and environmental protection. Seawater is the most abundant water resource in the world. If it can be used as the PEC electrolyte, the problem of insufficient raw materials for pure water electrolysis caused by the uneven distribution of water resources can be alleviated to a certain extent. However, the local corrosion of photoelectrode in chlorinated seawater seriously affects its engineering strength and service life. Therefore, the development of a seawater corrosion-resistant, stable and efficient photoanode material for PEC seawater hydrogen production is a topic worthy of research. [0003] Currently, TiO 2 Nanotube array (TNA) is one of the most widely use...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B11/06C25B1/04C25D11/26
CPCC25B1/04C25D11/26C25B1/55C25B11/091Y02E60/36Y02P20/133
Inventor 董博李飞
Owner JIANGXI UNIV OF TECH
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