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Quaternary sulfide semiconductor photocatalytic material used for concrete bacteriostasis and corrosion prevention as well as preparation method and application

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

Active Publication Date: 2017-01-04
ZHEJIANG UNIV
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  • Abstract
  • 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, which can be Ti0 2 Absorption of the part of UV light used for photocatalytic reactions is also lower

Method used

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  • Quaternary sulfide semiconductor photocatalytic material used for concrete bacteriostasis and corrosion prevention as well as preparation method and application
  • Quaternary sulfide semiconductor photocatalytic material used for concrete bacteriostasis and corrosion prevention as well as preparation method and application
  • Quaternary sulfide semiconductor photocatalytic material used for concrete bacteriostasis and corrosion prevention as well as preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0024] KM 2 Sb 3 S 7 crystals. Weigh the initial raw material K 2 CO 3 1.0mmol (0.138g), Mn 2.0mmol (0.11g), Sb 2 S 3 Put 0.5mmol (0.170g) and S 2.0mmol (0.064g) into a hydrothermal kettle, then add 0.3ml of ammonia water, 1.5mL of 85wt% hydrazine hydrate and 2.0ml of polyethylene glycol 400, and place the hydrothermal kettle at 140°C Under the reaction for 7 days. After the reaction finished, open the hydrothermal kettle, take out the product, wash 2 times with distilled water and dehydrated alcohol respectively, obtain the dark red rod-shaped crystal, productive rate is 40%, grain size 100-360 μ m (see figure 1 a). According to single crystal X-ray diffraction analysis, the crystal composition formula is KMn 2 Sb 3 S 7 , belonging to the tetragonal crystal system, I-42m space group, unit cell parameters α=90°, β=90°, γ=90°, Z=1, the crystal structure diagram is as follows Figure 5 shown. EDX element analysis shows that the crystal contains K, Mn, Sb, and S...

Embodiment 2

[0027] RbMn 2 Sb 3 S 7 crystals. Weigh the initial raw material Rb 2 CO 3 1.0mmol (0.231g), Mn 2.0mmol (0.11g), Sb 2 S 3 Put 0.5mmol (0.170g) and S 2.0mmol (0.064g) into a hydrothermal kettle, then add 0.3ml of ammonia water, 1.5mL of 85wt% hydrazine hydrate and 2.0ml of polyethylene glycol 400, and place the hydrothermal kettle at 140°C Under the reaction for 7 days. After the reaction finishes, open the hydrothermal kettle, take out the product, wash 2 times with distilled water and dehydrated alcohol respectively, obtain the dark red rod-shaped crystal, productive rate is 45%, grain size 60-150 μ m (see figure 1 b). According to single crystal X-ray diffraction analysis, the crystal composition formula is RbMn 2 Sb 3 S 7 , belonging to the tetragonal crystal system, I-4 2m space group, unit cell parameters α=90°, β=90°, γ=90°, Z=1, the crystal structure diagram is as follows Figure 5 shown. EDX elemental analysis shows that the crystal contains four elem...

Embodiment 3

[0029] With the quaternary sulfide semiconductor material AMn obtained in embodiment 1~2 2 Sb 3 S 7 (A=K, Rb), prepare photocatalytic material, as concrete anti-corrosion coating, specifically as follows:

[0030] Pretreatment: Sand passes through a 80-mesh sieve, and the concrete test block is wetted with water.

[0031] Dry mixing: weigh 5 parts of AMn 2 Sb 3 S 7 (A=K, Rb), 20 parts of tricalcium aluminate and 45 parts of tricalcium silicate are poured into the container, placed in a mixer and fully stirred evenly.

[0032] Wet mixing: add 5 parts of water to the above-mentioned dry mixture that has been stirred evenly, and place it in a mixer to mix well; after 10 minutes of mechanical stirring, while stirring, add 15 parts of sand and 10 parts of water Pour all together into a blender and continue blending for 10 minutes to finally form a well-dispersed coating.

[0033] Application: Dip the paint prepared above with a roller brush, and apply it evenly on the surfac...

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Abstract

The invention discloses a quaternary sulfide semiconductor photocatalytic material used for concrete bacteriostasis and corrosion prevention as well as a preparation method and application. The quaternary sulfide semiconductor material is obtained by using alkali carbonate, a transition metal (Mn), a binary solid solution (Sb2S3) and powdered sulfur (S) as raw materials and ammonia water, hydrazine hydrate and polyethylene glycol 400 as solvents to react in an environment at 120-180 DEG C for 5-8 days. The chemical composition formula of the quaternary sulfide semiconductor photocatalytic material is AMn2Sb3S7 (A=K, Rb). The preparation method has the advantages of high synthetic yield, simple operation process, low raw material cost, mild reaction conditions, low synthesis temperature, and the like. Quaternary sulfides obtained by adopting the preparation method have yield of more than 40% and high chemical purity and can be used in 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 concrete, a preparation method and an application. Background technique [0002] Chalcogenide crystal materials are recognized as a class of excellent semiconductor materials, and due to their different compositions and structures, these compounds can have important uses in many aspects such as light, electricity, and magnetism. This type of compound has a special structure, ionic bonds and covalent bonds are mixed, and can form various one-dimensional chains, two-dimensional layers or three-dimensional skeleton structures. The unique bonding characteristics of chalcogenides make them have rich structures. Depending on the structure and composition, this compound can be an insulator, semiconductor, electronic conductor or even a superconductor, and ha...

Claims

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Application Information

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IPC IPC(8): B01J27/04C01G45/00H01L31/032C30B29/46C30B7/14C04B41/50
CPCH01L31/032C30B7/14C30B29/46C01G45/006C04B41/009C04B41/5024B01J27/04C01P2002/77C01P2002/85C01P2002/84C04B2103/69C04B2111/26B01J35/39C04B41/5014C04B41/5007C04B41/50C04B41/4539
Inventor 刘毅闫东明侯佩佩沈亚英张洛栋
Owner ZHEJIANG UNIV
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