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Bi5O7I/Bi2MoO6 composite photocatalyst as well as preparation method and application thereof

A photocatalyst and catalyst technology, applied in the field of photocatalysis, can solve the problems of short lifespan of photogenerated carriers, influence of photocatalytic activity, easy recombination of photogenerated carriers, etc., achieving good stability and reusability, easy control, simple craftsmanship

Active Publication Date: 2021-07-13
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, Bi 2 MoO 6 The lifetime of photogenerated carriers in Bi is relatively short, and the photogenerated carriers are easy to recombine. 2 MoO 6 The photocatalytic activity of the
In the prior art, there is no Bi 5 o 7 I and Bi 2 MoO 6 Records related to composite structures

Method used

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  • Bi5O7I/Bi2MoO6 composite photocatalyst as well as preparation method and application thereof
  • Bi5O7I/Bi2MoO6 composite photocatalyst as well as preparation method and application thereof
  • Bi5O7I/Bi2MoO6 composite photocatalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Bi 5 o 7 Preparation of I nanofibers: 2.8mmol Bi(NO 3 ) 3 • 5H 2 O was dispersed in 80mL KI solution (0.035mol / L), ultrasonically dispersed for 2min, then 6mL of NaOH solution with a concentration of 2mol / L was added, then magnetically stirred at room temperature for 3h, the resulting product was centrifuged, deionized water and ethanol washed, After drying at 60 °C for 8 h, Bi 5 o 7 I nanofibers.

[0034] (2) Bi 5 o 7 I / Bi 2 MoO 6 The preparation of composite photocatalyst: the Bi prepared in 0.2mmol step (1) 5 o 7 The I fiber is first dispersed in 10 milliliters of ethylene glycol solution to obtain dispersion A; simultaneously take 0.05 mmol of Bi(NO 3 ) 3 • 5H 2 O was dissolved in 10 ml of ethylene glycol solution to obtain solution B; and 0.05 mmol of Na 2 MoO 4 • 2H 2 O was added to 40 ml of deionized water and magnetically stirred until completely dissolved to obtain solution C; then solution B was added dropwise to dispersion A, and magnetic...

Embodiment 2

[0036] (1) Bi 5 o 7 Preparation of I nanofibers: 2.8mmol Bi(NO 3 ) 3 • 5H 2 O was dispersed in 80mL KI solution (0.035mol / L), ultrasonically dispersed for 2min, then 6mL of NaOH solution with a concentration of 2mol / L was added, then magnetically stirred at room temperature for 3h, the resulting product was centrifuged, deionized water and ethanol washed, After drying at 60 °C for 8 h, Bi 5 o 7 I nanofibers.

[0037] (2) Bi 5 o 7 I / Bi 2 MoO 6 The preparation of composite photocatalyst: the Bi prepared in 0.2mmol step (1) 5 o 7 I was first dispersed in 10 milliliters of ethylene glycol solution to obtain dispersion A; meanwhile, 0.1 mmol of Bi(NO 3 ) 3 • 5H 2 O was dissolved in 10 ml of ethylene glycol solution to obtain solution B; and 0.1 mmol of Na 2 MoO 4 • 2H 2 O was added to 40 ml of deionized water and magnetically stirred until completely dissolved to obtain solution C; then solution B was added dropwise to dispersion A, and magnetically stirred for 5 m...

Embodiment 3

[0039] (1) Bi 5 o 7 Preparation of I nanofibers: 2.8mmol Bi(NO 3 ) 3 • 5H 2 O was dispersed in 80mL KI solution (0.035mol / L), ultrasonically dispersed for 2min, then 6mL of NaOH solution with a concentration of 2mol / L was added, then magnetically stirred at room temperature for 3h, the resulting product was centrifuged, deionized water and ethanol washed, After drying at 60 °C for 8 h, Bi 5 o 7 I nanofibers.

[0040] (2) Bi 5 o 7 I / Bi 2 MoO 6 The preparation of composite photocatalyst: the Bi prepared in 0.2mmol step (1) 5 o 7 I was first dispersed in 10 milliliters of ethylene glycol solution to obtain dispersion A; meanwhile, 0.125 mmol of Bi(NO 3 ) 3 • 5H 2 O was dissolved in 10 ml of ethylene glycol solution to obtain solution B; and 0.125 mmol of Na 2 MoO 4 • 2H 2 O was added to 40 ml of deionized water and magnetically stirred until completely dissolved to obtain solution C; then solution B was added dropwise to dispersion A, and magnetically stirred for...

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Abstract

The invention belongs to the technical field of photocatalysis, and particularly relates to a Bi5O7I / Bi2MoO6 composite photocatalyst as well as a preparation method and application thereof. According to the photocatalyst prepared through the method, Bi5O7I nanofibers serve as a substrate, Bi2MoO6 nanosheets vertically grow on the Bi5O7I nanofibers, the length of the Bi5O7I fibers is 0.5-10 microns, the width of the Bi5O7I fibers is 50-1000 nm, the thickness of the Bi5O7I fibers is 10-600 nm, the size of the Bi2MoO6 nanosheets is 20-1000 nm, and the thickness of the Bi2MoO6 nanosheets is 2-150 nm. The method is simple in process, easy to control and low in cost; The Bi5O7I / Bi2MoO6 heterojunction composite nano photocatalyst prepared by the preparation method disclosed by the invention has efficient visible light photocatalytic activity, good stability and reusability, and can still keep high catalytic activity after being cyclically catalyzed and used for multiple times.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, in particular to a Bi 5 o 7 I / Bi 2 MoO 6 Composite photocatalyst and its preparation method and application. Background technique [0002] With the rapid development of industrialization, sewage treatment has become an urgent problem to be solved. Semiconductor photocatalysis technology can convert solar energy into chemical energy, and then decompose organic pollutants, so it is considered to be a promising environmental pollution control technology. Since visible light components account for nearly half of sunlight, the development of photocatalysts with visible light response is one of the research hotspots in the field of photocatalysis. [0003] In recent years, bismuth-based semiconductor compound photocatalysts have emerged in the field of photocatalytic research, and have shown good photocatalytic performance. Bi 5 o 7 I is Bi x o y x z It is an important photocatalyst i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/132B01J35/02C02F1/30C02F101/34C02F101/38C02F101/30B01J35/00
CPCB01J27/132C02F1/30C02F2305/10C02F2101/345C02F2101/38C02F2101/30B01J35/40Y02W10/37
Inventor 曹永强张鑫张浩楠张兆泽杨萍
Owner UNIV OF JINAN