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Preparation method of barium titanate/iron oxyhydroxide photocatalyst

A technology of iron oxide light and barium titanate, which is applied in the field of photocatalysis, can solve the problems of waste of resources, narrow pH application range, etc., and achieve the effect of promoting separation, short time, and expanding the spectrum absorption range

Active Publication Date: 2021-09-28
SHAANXI UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In recent years, researchers have combined Fenton's reagent with UV technology to treat water pollution more effectively, but a large amount of H2O2, waste of resources, and the applicable range of pH is narrow

Method used

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  • Preparation method of barium titanate/iron oxyhydroxide photocatalyst
  • Preparation method of barium titanate/iron oxyhydroxide photocatalyst

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preparation example Construction

[0032] A kind of preparation method of barium titanate / iron oxyhydroxide photocatalyst, comprises the following steps:

[0033] Step 1: Add 18.3ml of N,N-dimethylacetamide (DMAC) to 58.4mL of isopropanol (IPA) and stir for a period of time, then add 2.5ml of tetrabutyl titanate (TBOT ), magnetically stirred evenly. Then pour the obtained suspension into a 100ml hydrothermal kettle, set the oven parameters to 200 ° C for 20 hours, and separate the suspension after the reaction is completed, wash it with absolute ethanol, and finally dry it in a 60 ° C oven to obtain H 2 Ti 2 o 5 Precursor;

[0034] Step 2: Pour 7ml of water into 28ml of absolute ethanol, and magnetically stir for 10min. Add 0.2g of H 2 Ti 2 o 5 Precursor, 0.3g of NaOH and 0.32g of Ba(OH) 2 ·8H 2 O was added to the above solution in turn, stirred by magnetic force for 30min, and then placed in a hydrothermal kettle for reaction. The temperature of the oven was set at 140°C, and the reaction time was set...

Embodiment 1

[0056] Step 1: Add 18.3ml of N,N-dimethylacetamide (DMAC) to 58.4mL of isopropanol (IPA) and stir for a period of time, then add 2.5ml of tetrabutyl titanate (TBOT ), magnetically stirred evenly. Then pour the obtained suspension into a 100ml hydrothermal kettle, set the oven parameters to 200 ° C for 20 hours, and separate the suspension after the reaction is completed, wash it with absolute ethanol, and finally dry it in a 60 ° C oven to obtain H 2 Ti 2 o 5 Precursor;

[0057] Step 2: Pour 7ml of water into 28ml of absolute ethanol, and magnetically stir for 10min. Add 0.2g of H 2 Ti 2 o 5 Precursor, 0.3g of NaOH and 0.32g of Ba(OH) 2 ·8H 2 O was added to the above solution in turn, stirred by magnetic force for 30min, and then placed in a hydrothermal kettle for reaction. The temperature of the oven was set at 140°C, and the reaction time was set at 8h. After the reaction, the precipitate was collected by centrifugation, washed with deionized water, and finally heat...

Embodiment 2

[0060] Step 1: Add 18.3ml of N,N-dimethylacetamide (DMAC) to 58.4mL of isopropanol (IPA) and stir for a period of time, then add 2.5ml of tetrabutyl titanate (TBOT ), magnetically stirred evenly. Then pour the obtained suspension into a 100ml hydrothermal kettle, set the oven parameters to 200 ° C for 20 hours, and separate the suspension after the reaction is completed, wash it with absolute ethanol, and finally dry it in a 60 ° C oven to obtain H 2 Ti 2 o 5 Precursor;

[0061] Step 2: Pour 7ml of water into 28ml of absolute ethanol, and magnetically stir for 10min. Add 0.2g of H 2 Ti 2 o 5 Precursor, 0.3g of NaOH and 0.32g of Ba(OH) 2 ·8H 2O was added to the above solution in turn, stirred by magnetic force for 30min, and then placed in a hydrothermal kettle for reaction. The temperature of the oven was set at 140°C, and the reaction time was set at 8h. After the reaction, the precipitate was collected by centrifugation, washed with deionized water, and finally heate...

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Abstract

The invention discloses a preparation method of a barium titanate / iron oxyhydroxide photocatalyst. The preparation method comprises the following steps: preparing an H2Ti2O5 precursor with a three-dimensional hierarchical structure by adopting a solvothermal method; by adopting a hydrothermal method and taking an H2Ti2O5 precursor as a template, carrying out topological conversion through ion exchange to prepare BaTiO3 powder; and dissolving FeCl3. 6H2O powder in absolute ethyl alcohol, adding the BaTiO3 powder obtained in the step 2 into the absolute ethyl alcohol, carrying out ultrasonic dispersion to obtain a suspension, adding NH4HCO3 into the suspension, carrying out a stirring reaction, and finally, washing and drying a reaction precipitate to obtain the BaTiO3 / FeOOH heterojunction photocatalyst. The preparation method is simple in process, low in reaction temperature, short in reaction time, low in material cost and suitable for industrial production; and the FeOOH / BaTiO3 heterogeneous photocatalyst obtained through the method is more in active sites, higher in sunlight utilization rate and higher in photon-generated carrier separation efficiency and has excellent photo-Fenton catalytic dye degradation performance.

Description

technical field [0001] The invention relates to the field of photocatalysis, in particular to a preparation method of barium titanate / iron oxyhydroxide photocatalyst. Background technique [0002] Photocatalytic technology has the advantages of mild operating conditions, economy, high efficiency and less secondary pollution, which has attracted widespread attention and developed rapidly. In 1972, Japanese research scholar Fujishima et al. discovered nano-TiO 2 The electrode material can decompose water to generate hydrogen under the irradiation of ultraviolet light, which opens the prelude to photocatalysis and the possibility of photocatalysis technology applied in energy. In recent years, semiconductor photocatalysis has been used in hydrogen energy production, air purification, antibacterial and antibacterial, and carbon dioxide reduction. Although photocatalytic technology has broad application prospects, there are still many problems in its large-scale industrial appl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/78B01J37/03B01J37/10C02F1/30C02F1/72C02F101/34C02F101/36C02F101/38
CPCB01J23/78B01J37/10B01J37/031C02F1/30C02F1/725C02F2305/10C02F2305/026C02F2101/308C02F2101/34C02F2101/36C02F2101/38B01J35/39Y02E60/36
Inventor 崔永飞孙欢欢郭鹏党培培
Owner SHAANXI UNIV OF SCI & TECH
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