A quaternary sulfide semiconductor photocatalytic material for antibacterial and anticorrosion of coastal concrete structures, its preparation method and application

A technology of concrete structure and photocatalytic materials, applied in semiconductor devices, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem of low ultraviolet light, achieve low raw material cost, mild reaction conditions, and simple and convenient operation process Effect

Active Publication Date: 2019-02-22
ZHEJIANG UNIV
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  • Description
  • Claims
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Problems solved by technology

But its bottleneck is that only under the irradiation of short-wave ultraviolet light, Ti0 2 In order to show photocatalytic properties, ultraviolet light only accounts for 3% to 4% of sunlight, of which Ti0 2 Absorbs less UV light for photocatalytic reactions

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  • A quaternary sulfide semiconductor photocatalytic material for antibacterial and anticorrosion of coastal concrete structures, its preparation method and application
  • A quaternary sulfide semiconductor photocatalytic material for antibacterial and anticorrosion of coastal concrete structures, its preparation method and application
  • A quaternary sulfide semiconductor photocatalytic material for antibacterial and anticorrosion of coastal concrete structures, its preparation method and application

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preparation example Construction

[0020] CsMnAs 3 S 6 The preparation method is: using cesium hydroxide monohydrate, metal manganese, binary solid solution arsenic trisulfide and elemental sulfur with a molar ratio of 1.0-2.0:1.0-2.0:0.5:2.0-3.5 as raw materials; 0.5-1.0: 2.0-3.5 85% hydrazine hydrate and oleic acid as solvents; add every 0.410-0.665 grams of raw materials into 2.5-4.5mL of the solvent in proportion, and react in an oven at 130-160°C for 4-7 Days, the quaternary sulfide semiconductor material CsMnAs was obtained after washing with deionized water and ethanol 3 S 6 .

[0021] In the following examples of the present invention, the binary solid solution arsenic trisulfide can be prepared by using existing materials or by the following method: As and S with a molar ratio of 2:3 are packed into a quartz tube to seal the tube, and then the sealed quartz tube Put it into a muffle furnace, slowly raise the temperature to 680°C, and keep it warm for 12 hours, then cool it down to room temperature ...

Embodiment 1

[0023] CsMnAs 3 S 6 crystals. Weigh the initial raw material CsOH·H 2 O 1.5mmol (0.252g), Mn 1.0mmol (0.055g), As 2 S 3 Put 0.5mmol (0.123g) and S 3.0mmol (0.096g) into a hydrothermal kettle, then add 0.5ml of 85% hydrazine hydrate and 2.0mL of oleic acid, and place the hydrothermal kettle at 140°C for 5 days. After the reaction was finished, the hydrothermal kettle was opened, the product was taken out, washed 2 times with distilled water and dehydrated alcohol respectively, to obtain orange blocky crystals, the productive rate was 90%, and the grain size was 150-300 μm (see figure 1 ). According to single crystal X-ray diffraction analysis, the crystal composition formula is CsMnAs 3 S 6 ,, R-3 space group, unit cell parameters α=90°, β=90°, γ=120°, Z=3, the crystal structure diagram is as follows image 3 shown. EDX elemental analysis showed that the crystal contained Cs, Mn, As, and S four elements, and the content ratio of each element was consistent with ...

Embodiment 2

[0026] CsMnAs 3 S 6 crystals. Weigh the initial raw material CsOH·H 2 O 2.0mmol (0.336g), Mn 1.0mmol (0.055g), As 2 S 3 Put 0.5mmol (0.123g) and S 2.5mmol (0.080g) into a hydrothermal kettle, then add hydrazine hydrate 0.5ml and oleic acid 2.0mL, and place the hydrothermal kettle at 140°C for 5 days. After the reaction, the hydrothermal kettle was opened, the product was taken out, and washed twice with distilled water and absolute ethanol respectively to obtain orange blocky crystals with a yield of 20%.

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Abstract

The invention discloses a bacteriostatic and preservative quaternary sulfide semiconductor photocatalytic material for a coastal concrete structure, the preparation method thereof and the application thereof. An alkali metal hydroxide compound (CsOH*H2O), a transition metal (Mn), a binary solid solution (As2S3) and the powdered sulfur (S) are adopted as raw materials, while oleic acid and hydrazine hydrate are adopted as solvents. The above materials are subjected to reaction at 130-160 DEG C for 4-7 days so as to obtain a quaternary sulfide semiconductor material. The chemical formula of the quaternary sulfide semiconductor material is CsMnAs3S6. The invention has the advantages of high synthesis yield, simple operation process, simple raw materials, low cost, mild reaction condition, low synthesis temperature and the like. Meanwhile, the yield of the obtained quaternary sulfide is up to over 90% and the quaternary sulfide is high in chemical purity. The quaternary sulfide can be applied to the fields of corrosion prevention, bacteriostasis, batteries, catalysis and the like.

Description

technical field [0001] The invention belongs to the field of inorganic semiconductor materials, and in particular relates to a quaternary sulfide semiconductor photocatalytic material used for antibacterial and anticorrosion of coastal concrete structures, a preparation method and application. Background technique [0002] Semiconductor photocatalytic materials have attracted the attention of researchers due to their unique functions in the fields of photoelectricity, air purification, sterilization and deodorization, and wastewater treatment. Photocatalytic technology is a new environmental protection technology gradually developed from the 1970s. It is based on the characteristics of semiconductor materials that can be activated on the surface of materials under light conditions, so as to oxidize and decompose organic matter, reduce heavy metal ions, kill bacteria and Eliminate odor and other effects. As an environmentally friendly new technology, semiconductor photocatal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/04C01G45/00H01L31/032C30B29/46C30B7/14C04B41/68
CPCB01J27/04B01J35/004C01G45/006C01P2002/77C01P2002/84C01P2002/85C04B41/5035C04B41/68C04B2103/69C04B2111/26C30B7/14C30B29/46H01L31/032C04B41/5032C04B41/5024C04B41/5014C04B41/4535
Inventor 刘毅侯佩佩闫东明张洛栋
Owner ZHEJIANG UNIV
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