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A self-assembled solar photocatalyst for efficiently transferring electrons and its preparation method and application

A photocatalyst, sunlight technology, applied in the field of photocatalysis, can solve the problem of low photocatalytic conversion efficiency, and achieve the effect of improving efficiency, improving efficiency and stable properties

Active Publication Date: 2019-07-05
LIAONING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But for pure NiGa 2 o 4 and Bi 2 sn 2 o 7 The photocatalytic conversion efficiency is also low due to the easy recombination of their photogenerated electron and hole pairs

Method used

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  • A self-assembled solar photocatalyst for efficiently transferring electrons and its preparation method and application
  • A self-assembled solar photocatalyst for efficiently transferring electrons and its preparation method and application
  • A self-assembled solar photocatalyst for efficiently transferring electrons and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Example 1 Preparation and detection of a novel self-assembled solar photocatalyst capable of efficiently transferring electrons

[0041] (1) Preparation of NiGa 2 o 4 nano powder

[0042] 0.376g Ga 2 o 3 The powder was added to 50 mL of 1mol / L nickel nitrate solution, and the resulting mixture was adjusted to pH 12 with sodium hydroxide (stirring for 30 min while adjusting), and the resulting suspension solution was transferred to a reactor at 180°C for 48 h, cooled to room temperature, A light blue precipitate was obtained, washed several times with deionized water, and then dried at 60°C for 8 hours to obtain NiGa 2 o 4 Powder. Grind the powder finely, bake it in a muffle furnace at 500°C for 2 hours, take it out, and then grind it to get NiGa 2 o 4 Nano powder.

[0043] (2) Preparation of MoS 2 nano powder

[0044] 2.42g Na 2 MoO 4 and 1.94g of thioacetamide were dissolved in 30mL of deionized water, ultrasonicated for 30 minutes, the obtained suspension...

Embodiment 2

[0066] Example 2Er 3+ :Y 3 al 5 o 12 @NiGa 2 o 4 / MoS 2 / Bi 2 sn 2 o 7 Application in photocatalytic conversion of nitrite and sulfite

[0067] (1) Effect of simulated sunlight irradiation time and corresponding reaction kinetics on the photocatalytic conversion rate of nitrite and sulfite

[0068] Perform Er under simulated sunlight 3+ :Y 3 al 5 o 12 @NiGa 2 o 4 / MoS 2 / Bi 2 sn 2 o 7 Photocatalytic conversion of nitrite and sulfite by photocatalysts. Before light exposure, will contain NO 2 - and SO 3 2- The solution was stirred for 30 min in the dark and reached adsorption-desorption equilibrium. Then, solution samples were taken every 1.0 hour, and the conversion of nitrite and sulfite was checked by ion chromatography. From Figure 5a-1 It can be seen that with the increase of the simulated sunlight irradiation time, the photocatalytic conversion rate shows an upward trend. Under 4.00 hours of sunlight irradiation, for NO 2 - and SO 3 2- , an...

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Abstract

The invention relates to a self-assembled solar photocatalyst that efficiently transfers electrons and its preparation method and application. Through sol hydrothermal and calcination methods, in Er 3+ :Y 3 Al 5 O 12 @NiGa 2 O 4 and Bi 2 Sn 2 O 7 Insert MoS between 2 As a conductive channel, a new Z-shaped photocatalytic system is formed. The prepared Er 3+ :Y 3 Al 5 O 12 @NiGa 2 O 4 / MoS 2 / Bi 2 Sn 2 O 7 The composite material shows efficient and stable photocatalytic activity in the conversion process of nitrite and sulfite, and has broad application prospects in nitrite and sulfite wastewater treatment.

Description

technical field [0001] The invention belongs to the field of photocatalysis, in particular to a self-assembled solar photocatalyst Er that can efficiently transfer electrons 3+ :Y 3 al 5 o 12 @NiGa 2 o 4 / MoS 2 / Bi 2 sn 2 o 7 Its preparation method and application in photocatalytic conversion of nitrite and sulfite. Background technique [0002] Recently, the global water pollution problem has seriously endangered human life, among which nitrite and sulfite pollution is particularly serious. Nitrite is a strong oxidant. After entering the blood, it combines with hemoglobin to make oxyhemoglobin into methemoglobin, thereby losing its oxygen-carrying capacity, resulting in tissue hypoxia, cyanosis and poisoning, and has a dilating effect on peripheral blood vessels. Sulfites are a type of food preservative that can cause allergies and other health problems. Common symptoms most commonly caused by ingestion of sulfite-containing foods or beverages include difficulty ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/051C02F1/30C01C1/24C02F101/16
CPCC01C1/24C02F1/30B01J23/002B01J27/0515C02F2101/101C02F2101/166C02F2305/10B01J35/39
Inventor 宋有涛马雪王国伟王春权王君
Owner LIAONING UNIVERSITY
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