Quaternary sulfide semiconductor photocatalytic material for bacteriostasis and corrosion prevention of concrete surface and preparation method
A photocatalytic material, concrete surface technology, applied in anti-corrosion coatings, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem of low photocatalytic reaction, achieve high chemical purity, mild reaction conditions, simple operation process handy effect
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[0018] CsMnAsS 3 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 diethyltriamine and oleic acid are solvents; add every 0.410-0.665 grams of raw materials into 2.5-4.5mL of the solvent in proportion, and react 4- in an oven at 130-160°C After 7 days, the quaternary sulfide semiconductor material CsMnAsS was obtained after washing with deionized water and ethanol 3 .
[0019] The binary solid solution arsenic trisulfide can be prepared by using existing materials or by the following method: put As and S with a molar ratio of 2:3 into a quartz tube to seal the tube, and then put the sealed quartz tube into the muffle In the furnace, the temperature was slowly raised to 680°C, and kept for 12 hours, then naturally cooled to room temperature, and the quartz tube was opened to grind the bulk raw material...
Embodiment 1
[0021] CsMnAsS 3 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 diethyltriamine and 2.0mL of oleic acid, and place the hydrothermal kettle at 140°C for 5 days. After the reaction finishes, open the hydrothermal kettle, take out the product, wash 2 times with distilled water and dehydrated alcohol respectively, obtain red blocky crystal, productive rate is 90%, grain size 150-260 μ m (see figure 1 ). According to single crystal X-ray diffraction analysis, the crystal composition formula is CsMnAsS 3 , belonging to the monoclinic system, space group P2(1) / n, unit cell parameters α=90°, β=95.675(4)°, γ=90°, Z=4, 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 the results...
Embodiment 2
[0024] CsMnAsS 3 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 1.0ml of diethyltriamine and 2.0mL of oleic acid, 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 30%.
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