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Preparation method and application of novel perovskite photocatalyst containing bismuth

A perovskite type, photocatalyst technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., to achieve good photocatalytic activity, simple operation, and low cost

Inactive Publication Date: 2011-04-20
INNER MONGOLIA UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Many researchers have applied Bi-containing compounds to photocatalytic reactions, but there are few studies on the degradation of phenol-containing substances by Bi-containing perovskites. Therefore, this patent synthesizes A-site Bi-containing perovskite catalysts and investigates their visible light photocatalytic degradation. The activity of p-chlorophenol

Method used

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  • Preparation method and application of novel perovskite photocatalyst containing bismuth
  • Preparation method and application of novel perovskite photocatalyst containing bismuth
  • Preparation method and application of novel perovskite photocatalyst containing bismuth

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Experimental program
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Effect test

Embodiment 1

[0027] Embodiment 1: take by weighing 8.7313g Bi(NO 3 ) 3 ·5H 2 O, 0.6498g La(NO 3 ) 3 ·nH 2 O and 8.08g Fe(NO 3 ) 3 9H 2 O was dissolved in 200mL 2mol / L nitric acid solution to obtain a transparent solution; 16.8112g of citric acid was weighed and dissolved in 160mL deionized water, dissolved and added to the transparent solution, and stirred in a constant temperature water bath at 70°C to evaporate the water to obtain a transparent solution Viscous colloid. The obtained colloid was dried in an oven at 100°C in an air atmosphere for 24 hours to obtain a xerogel, then calcined in a muffle furnace at 500°C for 3 hours to obtain an oxide powder, and then calcined in an air atmosphere at 700°C for 3 hours to obtain Bi 0.9 La 0.1 FeO 3 Catalyst, the catalyst prepared in this example degrades 20mg / L p-chlorophenol simulated wastewater under visible light, and the catalyst dosage is 1g / L, the photocatalytic degradation rate at different times is shown in the following tabl...

Embodiment 2

[0030] Embodiment 2: implementation condition is the same as embodiment 1, and difference is to take by weighing 9.2163g Bi(NO 3 ) 3 ·5H 2 O, 0.3249gLa(NO 3 ) 3 ·nH 2 O and 8.08g Fe(NO 3 ) 3 9H 2 O was dissolved in 200mL 2mol / L nitric acid solution to obtain a transparent solution; finally Bi 0.95 La 0.05 FeO 3 Catalyst, the catalyst prepared in this example degrades 20mg / L p-chlorophenol simulated wastewater under visible light, and the catalyst dosage is 1g / L, the photocatalytic degradation rate at different times is shown in the following table:

[0031] time / h

Embodiment 3

[0032] Embodiment 3: implementation condition is the same as embodiment 1, and difference is to take by weighing 4.8507g Bi(NO 3 ) 3 ·5H 2 O, 3.2492gLa(NO 3 ) 3 ·nH 2 O and 8.08g Fe(NO 3 ) 3 9H 2 O was dissolved in 200mL 2mol / L nitric acid solution to obtain a transparent solution; finally Bi 0.5 La 0.5 FeO 3 Catalyst, the catalyst prepared in this example degrades 20mg / L p-chlorophenol simulated wastewater under visible light, and the catalyst dosage is 1g / L, the photocatalytic degradation rate at different times is shown in the following table:

[0033] time / h

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Abstract

The invention discloses a preparation method and an application of a degradation phenolic wastewater perovskite photocatalyst containing bismuth. The main preparation technology comprises the following steps: dissolving Bi(NO3)3.5H2O, La(NO3)3.nH2O and Fe(NO3)3.9H2O in nitric acid, then adding citric acid to fully mix, performing thermostatic stirring to obtain transparent viscous gel, placing the transparent viscous gel in a drying oven to dry and obtain dried gel; decomposing the dried gel in a muffle furnace, and roasting with a high temperature furnace to obtain Bi1-xLaxFeO3 catalyst. The preparation method has simple technology and low cost. The catalyst is used in the photocatalytic reaction and is characterized in that the degradation activity of the catalyst to parachlorophenol is high under visible-light irradiation.

Description

technical field [0001] The invention relates to a preparation method of a catalyst, in particular to a preparation method of a bismuth-containing perovskite photocatalyst and its application in photocatalytic degradation of phenol-containing wastewater. Background technique [0002] Coal is the main fossil energy in China, and it is also the main raw material for many important chemical products. With the continuous and rapid development of social economy, the demand for energy and chemical products in China has also shown a relatively high growth rate in recent years. It has occupied an important position in the field of production. As the country's control over pollutant discharge is increasingly strengthened, and my country's large-scale coal chemical industry bases are generally located in water-scarce areas, strengthening sewage treatment, realizing recycling and zero discharge of wastewater, and saving water resources have become the technological development of coal c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/843B01J37/00C02F1/30C02F101/34
CPCY02W10/37
Inventor 胡瑞生贾海霞徐娜白雅琴
Owner INNER MONGOLIA UNIVERSITY
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