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In2O3 photocatalyst for degrading perfluorooctanoic acid and preparation method thereof

A photocatalyst, perfluorooctanoic acid technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc. Inhibit the catalytic degradation activity and other problems, and achieve the effect of favorable surface interaction strength and high catalytic degradation activity

Pending Publication Date: 2022-03-01
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If the surface interaction is too strong, it will be difficult for the degradation intermediate to desorb from the catalyst surface, which will easily cause the deactivation of the catalyst. However, if the surface interaction is too weak, it will not be able to induce the rapid transfer of photogenerated holes to PFOA, which will inhibit the catalytic degradation activity.

Method used

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  • In2O3 photocatalyst for degrading perfluorooctanoic acid and preparation method thereof
  • In2O3 photocatalyst for degrading perfluorooctanoic acid and preparation method thereof
  • In2O3 photocatalyst for degrading perfluorooctanoic acid and preparation method thereof

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Embodiment 1

[0037] This embodiment provides in 2 O 3 The preparation method of photocatalysts, including the following steps:

[0038] S1, massage 1: 5 with indium hydrate and urea, dissolve in 50 ml of water, and finally mixed with 600 r / min at a rate of 2 h, resulting in a precursor solution;

[0039] S2, the above precursor solution was transferred to 100 mL of the polytetrafluorine liner, sealed in a stainless steel autoclave of 0.02 to 0.3 GPa, and was placed in an oven at 120 ° C for 17 h;

[0040] After the hydrothermal reaction is completed, the hydrothermal kettle is removed, and the heat product is centrifuged at 8000 r / min, remove the supernatant, remove the supernatant, repeat the supernatant, and then repeated 3 times, placed in a vacuum drying box at 50 ° C Dry 24h to get in (OH) 3 powder;

[0041] S3, IN (OH) obtained by S2 3 Powder is placed in a ceramic crucible, placed in the tube furnace at a tube furnace to be raised to 350 ° C for 5 h after heating rate of 5 ° C / min...

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Abstract

The invention relates to the technical field of photocatalysts, and particularly discloses an In2O3 photocatalyst for degrading perfluorooctanoic acid and a preparation method of the In2O3 photocatalyst. The preparation method comprises the following steps: S1, dissolving indium salt and urea in water to form a precursor solution; s2, heating and reacting the precursor solution, and separating to obtain a solid; and S3, taking the solid, and calcining to obtain the In2O3 photocatalyst. The invention also discloses an application of the In2O3 photocatalyst in the treatment of refractory organic pollutants. The space group of the In2O3 photocatalyst provided by the invention is Ia-3, the exposed crystal faces comprise {110} Ia-3 and {111} Ia-3, and the In2O3 photocatalyst provided by the invention has more suitable surface interaction strength and higher catalytic degradation activity under the combined action of the two exposed crystal faces, and can be used for strengthening treatment of nondegradable organic matters such as perfluorooctanoic acid.

Description

Technical field [0001] The present invention relates to the field of photocatalytic water treatment, and in particular, there is an ink. 2 O 3 Photocatalyst and its preparation method thereof. Background technique [0002] Per-AND Polyfluoroalkyl Substances, PFAS was born in the 1930s, mainly including perfluorocarboxylic acid acids, pfcas, PFSAS, PFSAS, polyol (Fluorotelomer Alcohols) , FTOHS, etc., due to its stable and hydrophobic oil, it is widely used in industrial production, surfactant, fire-resistant coatings and food packaging from the 1940s. [0003] Many studies have shown that the compounds have environmental persistence and biological accumulation and have a large amount in the environment. Among them, PFOA and perfluoroalkylsulfonate (PFOS) are two PFAss that are most often detected in the environment. In addition, the perfluorocomposite represented by PFOA and PFOS also has a reproductive toxicity, mutagenic toxicity, developmental toxicity, neurotoxicity, immunoto...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/08C02F1/32C02F101/34C02F101/36
CPCB01J23/08C02F1/32C02F2305/10C02F2101/34C02F2101/36B01J35/23B01J35/39
Inventor 黄宇雄丁文慧谭贤军
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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