Perovskite type composite photocatalyst and preparation method thereof, and special system and method

A perovskite-type, photocatalyst technology, applied in chemical instruments and methods, heterogeneous catalyst chemical elements, physical/chemical process catalysts, etc., can solve the problem of low utilization of photogenerated charge carriers, inability to absorb and utilize visible light, Reducing problems such as light utilization efficiency, to achieve the effect of improving photocatalytic performance, improving photocatalytic performance, and inhibiting recombination

Active Publication Date: 2021-11-19
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, widely used TiO 2 Due to its large bandgap width, photocatalysts only have spectral responses to ultraviolet and near-ultraviolet light, and cannot absorb and utilize visible light, which greatly reduces the utilization efficiency of light; secondly, the utilization rate of photogenerated charge carriers produced by pure photocatalysts is low, Photogenerated electron-hole pairs are extremely easy to recombine, resulting in low photocatalytic efficiency

Method used

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  • Perovskite type composite photocatalyst and preparation method thereof, and special system and method
  • Perovskite type composite photocatalyst and preparation method thereof, and special system and method
  • Perovskite type composite photocatalyst and preparation method thereof, and special system and method

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Experimental program
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Effect test

Embodiment 1

[0040] Such as figure 1 As shown, the special system for photocatalytic wastewater treatment of semiconductor organic wastewater includes a sedimentation module, a photocatalytic wastewater recycling treatment module, an exhaust gas absorption module and a wastewater storage module. The settling module includes a solid settling tank 1 , a three-way liquid inlet regulating valve 2 and a liquid inlet pump 3 . The photocatalytic wastewater circulation treatment module includes a photocatalytic reactor 4 and a COD online monitor 12. The top of the photocatalytic reactor 4 is respectively provided with a safety valve 5, an air intake regulating valve 7, a pressure gauge 11 and a liquid level gauge 24. The photocatalytic reaction The inside of device 4 is divided into a zone, b zone and c zone (such as figure 2 shown), each area is provided with a light source 6 from top to bottom, and each area is provided with alternately arranged fillers 9 and perovskite composite photocatalyst...

Embodiment 2

[0049] (1)LaNi 0.96 co 0.04 o 3 preparation of

[0050]According to cationic and anionic surfactant mol ratio is 1: 10, takes by weighing 3.645g cetyltrimethylammonium bromide and 57.650g fatty alcohol polyoxyethylene ether sodium sulfate, according to water and cationic surfactant mass ratio is 1: 0.024, add 150mL deionized water, stir well to get vesicle solution, according to the molar ratio of lanthanum nitrate hexahydrate, nickel nitrate hexahydrate and cobalt nitrate hexahydrate is 1:0.96:0.04, add 8.660g lanthanum nitrate hexahydrate, 5.583g Mix and dissolve nickel nitrate hexahydrate and 0.232g cobalt nitrate hexahydrate, add tetramethylammonium hydroxide to adjust pH=12, filter the obtained precipitate, wash with deionized water and absolute ethanol several times, centrifuge, and dry in an oven at 85°C 12h, calcined in a muffle furnace at 800°C for 4h to obtain LaNi 0.96 co 0.04 o 3 .

[0051] (2)LaNi 0.96 co 0.04 o 3 / CeO 2 preparation of

[0052] LaNi sy...

Embodiment 3

[0056] (1)LaNi 0.94 co 0.06 o 3 preparation of

[0057] According to cationic and anionic surfactant mol ratio is 1: 2.5, takes by weighing 3.645g cetyl trimethylammonium bromide and 14.580g fatty alcohol polyoxyethylene ether sodium sulfate, according to water and cationic surfactant mass ratio is 1: 0.03, add 120mL deionized water, stir well to obtain vesicle solution, according to the molar ratio of lanthanum nitrate hexahydrate, nickel nitrate hexahydrate and cobalt nitrate hexahydrate is 1:0.94:0.06, add 8.660g lanthanum nitrate hexahydrate, 5.467g Nickel nitrate hexahydrate and 0.349g cobalt nitrate hexahydrate were stirred and dissolved, and tetramethylammonium hydroxide was added to adjust the pH to 9. The resulting precipitate was filtered, washed with deionized water and absolute ethanol several times, centrifuged, and dried in an oven at 85°C 12h, calcined in a muffle furnace at 800°C for 4h to obtain LaNi 0.94 co 0.06 o 3 .

[0058] (2)LaNi 0.94 co 0.06 o ...

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Abstract

The invention discloses a perovskite type composite photocatalyst and a preparation method thereof, and a special system and method, wherein the perovskite type composite photocatalyst is LaNi[x]Co[1-x]O[3]/CeO[2], and x is 0.9-0.98. LaNi[x]Co[1-x]O[3] is obtained through modification by doping Co in LaNiO3 under the condition that anion and cation surfactants with different molar ratios are mixed, then LaNi[x]Co[1-x]O[3] and CeO2 are compounded under ultrasonic assistance, separation of charge carriers is effectively promoted, the specific surface area is increased, and the perovskite type composite photocatalyst which is environmentally friendly and high in photocatalytic capacity and adsorption performance is obtained. The integrated wastewater and tail gas treatment system is totally closed by adopting special equipment, semiconductor organic wastewater is efficiently treated by utilizing a perovskite type composite photocatalyst LaNi[x]Co[1-x]O[3]/CeO[2], and the system is automatic, intelligent, high in mass transfer efficiency, capable of fully utilizing visible light, environment-friendly and free of secondary pollution.

Description

technical field [0001] The invention relates to a catalyst, a preparation method and a special system and method, in particular to a perovskite-type composite photocatalyst with good adsorption performance and strong photocatalytic ability, which is applied to the degradation of organic wastewater in the semiconductor industry and its preparation method and wastewater treatment When the special supporting processing system and method. Background technique [0002] Due to the rapid development of modern society and information technology and other fields, the continuous increase of emerging demands such as big data computing, artificial intelligence, and the Internet of Things has promoted the development of the semiconductor industry. The development of the semiconductor industry has not only brought huge economic benefits and technological development. , also brought about the problem of environmental pollution. In the process of semiconductor production, a large amount of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83C02F1/30C02F101/30
CPCB01J23/83B01J23/002B01J35/004C02F1/30B01J2523/00C02F2101/30C02F2305/10B01J2523/3706B01J2523/3712B01J2523/845B01J2523/847
Inventor 吴敏亓会秀
Owner SOUTHEAST UNIV
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