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Synthetic method and application of rare-earth-doped SnO2/TS-1 nano photocatalytic material

A catalytic material and rare earth doping technology, applied in the field of photocatalytic materials, can solve problems such as few researches, and achieve the effects of good repeatability, good reusability, and simple synthesis method

Pending Publication Date: 2018-08-28
HUNAN INSTITUTE OF ENGINEERING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are not many studies on the modification of tin dioxide by doping with rare earth elements, especially the research on the photodegradation of practical industrial wastewater.

Method used

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  • Synthetic method and application of rare-earth-doped SnO2/TS-1 nano photocatalytic material
  • Synthetic method and application of rare-earth-doped SnO2/TS-1 nano photocatalytic material
  • Synthetic method and application of rare-earth-doped SnO2/TS-1 nano photocatalytic material

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Experimental program
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Effect test

Embodiment 1

[0038] The preparation of embodiment 1 photocatalyst LST

[0039] Weigh 3.0gSnCl 4 ·5H 2 O, add 20ml distilled water, 0.06g lanthanum nitrate and 0.1ml concentrated HCl, then add a certain amount of ammonia water, adjust the pH of the solution to 7.0–8.0, obtain a white sol after ultrasonic dispersion for 2 hours; add 3.0g titanium silicon molecular sieve to the sol TS-1, stirred for 2 hours, left to age for 15 hours, then washed and dried to obtain the precursor, the precursor was placed in a muffle furnace, and fired at 500 ° C for 2 hours to obtain lanthanum-doped supported nano-SnO 2 , named LST.

Embodiment 2

[0040] The preparation of embodiment 2 photocatalyst CST

[0041] Weigh 3.0gSnCl 4 ·5H 2 O, add 20ml distilled water, 0.06g cerium nitrate and 0.1ml concentrated HCl, then add a certain amount of ammonia water, adjust the pH of the solution to 7.0–8.0, obtain a white sol after ultrasonic dispersion for 2 hours; add 3.0g titanium silicon molecular sieve to the sol TS-1, stirred for 2 hours, left to age for 15 hours, then washed and dried to obtain the precursor, the precursor was placed in a muffle furnace, and fired at 500°C for 2 hours to obtain rare earth metal cerium-doped supported nano-SnO 2, named CST.

Embodiment 3

[0042] The preparation of embodiment 3 photocatalyst LCST

[0043] Weigh 3.0gSnCl 4 ·5H 2 O, add 20ml of distilled water, 0.06g of lanthanum nitrate and 0.1ml of concentrated HCl, stir until the solution is clear, then add a certain amount of ammonia water, adjust the pH of the solution to 7.0–8.0, obtain a white sol after ultrasonic dispersion for 2 hours; add 3.0g of titanium-silicon molecular sieve TS-1 and 0.03g of cerium nitrate were stirred for 2 hours, then left to age for 15 hours, then washed and dried to obtain a precursor, which was placed in a muffle furnace and calcined at 500°C for 2 hours to obtain Lanthanum and Ce-doped supported nano-SnO 2 , named LCST.

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Abstract

The invention discloses a synthetic method and application of a rare-earth-doped SnO2 / TS-1 nano photocatalytic material. The tin chloride pentahydrate and a titanium-silicon molecular sieve are used as main raw materials, lanthanum or / and cerium is used as a rare-earth doping element, and a sol-gel method is used for synthesizing the rare-earth-doped SnO2 / TS-1 nano photocatalytic material. The synthetic method disclosed by the invention is simple, easy in operation and good in repeatability; after the rare-earth doping, the photocatalytic performance of the photocatalytic material can be significantly improved; particularly after the co-doping of La and Ce, the photocatalytic performance is obviously improved, and the degradation rate of the pohtocatalyst LCST for rhodamine B in rhodamineB simulation waste water can reach 99.87 percent; and the degradation effect for the actual printing dye is good, the degradation effect of LCST for acidic blue, active black, RGFL yellow, acidic redA-2BF in the actual dye waste water can separately reach 99.85 percent, 99.78 percent, 96.15 percent and 94.6 percent, and the reusability is good.

Description

technical field [0001] The invention relates to photocatalytic materials, in particular to a rare earth-doped SnO 2 / TS-1 nano photocatalytic material synthesis method and application. Background technique [0002] With the increasingly serious environmental pollution, photocatalytic technology has the characteristics of fast degradation, complete degradation, and energy saving, making the use of photocatalytic degradation of organic pollutants to become one of the most popular research topics to deal with environmental pollution. Photocatalytic technology uses light as the energy source to excite electrons from the valence band in semiconductors to transition to the conduction band to generate electron-hole pairs, which in turn generate free radicals, and through a series of free radical reactions, the degradation of organic matter is achieved. n-type semiconductor material SnO 2 The bandgap width is 3.6eV, and it can only absorb about 5% of sunlight, which severely limit...

Claims

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Application Information

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IPC IPC(8): B01J29/89C02F1/30C02F101/30
CPCC02F1/30B01J29/89C02F2101/308C02F2305/10B01J35/39
Inventor 谭正德谭洋周新晨王娇玉湛日梦罗志
Owner HUNAN INSTITUTE OF ENGINEERING
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