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Composite photocatalytic material of carbon nitride and bismuth oxyhalide and preparation method of composite photocatalytic material

A composite photocatalysis, bismuth oxyhalide technology, applied in chemical instruments and methods, physical/chemical process catalysts, special compound water treatment, etc., can solve the problems that have not been reported in the literature, and achieve easy operation, environmental friendliness, The effect of simple process

Inactive Publication Date: 2019-01-08
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far, the use of surfactants to achieve high-performance, g-C with abundant oxygen vacancies 3 N 4 with BiOX a Y b The preparation of composite materials has not been reported in the literature

Method used

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  • Composite photocatalytic material of carbon nitride and bismuth oxyhalide and preparation method of composite photocatalytic material
  • Composite photocatalytic material of carbon nitride and bismuth oxyhalide and preparation method of composite photocatalytic material
  • Composite photocatalytic material of carbon nitride and bismuth oxyhalide and preparation method of composite photocatalytic material

Examples

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Embodiment 1

[0033] g-C of the present invention 3 N 4 with BiOX a Y b The preparation method of composite photocatalytic material comprises the following steps:

[0034] 2gg-C 3 N 4 The precursor melamine was put in a covered crucible and calcined at 550 °C for 2 h in a muffle furnace. 0.3 g g-C 3 N 4 After mixing with 25 mL of deionized water, sonicate for 30 min, and transfer to g-C at 80°C 3 N 4 Add 5.8gBi(NO 3 ) 3 ·5H 2 O, 0.5g PVP and 25mL glycerin were mixed for 30min, then 100mL mixed solution of 0.67gKCl and 0.50g KI (KCl and KI total 12mmol) was added dropwise, the pH was adjusted to 9.0 with ammonia water, and the reaction was continued at 80°C for 1h . The reacted sample was filtered and washed 3 times, then dried and ground to obtain g-C 3 N 4 with BiOX a Y b Composite photocatalytic material ( figure 1 , figure 2 and image 3 ).

[0035] The composite photocatalytic material was used to degrade 10 mg / L bisphenol A (BPA) solution, and the degradation rate...

Embodiment 2

[0037] In this embodiment, g-C in step (2) 3 N 4 The mass is 0.2 g, and other steps are the same as in Example 1.

[0038] The composite photocatalytic material was used to degrade 10 mg / LBPA solution, and the degradation rate of BPA was 96.8 % under visible light for 30 min ( Figure 5 ).

Embodiment 3

[0040] In this embodiment, g-C in step (2) 3 N 4 The mass is 0.4 g, and other steps are the same as in Example 1.

[0041] The composite photocatalytic material was used to degrade 10 mg / LBPA solution, and the degradation rate of BPA was 93.6% under visible light for 30 min ( Figure 6 ).

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Abstract

The invention belongs to the technical field of photocatalysts, and in particular relates to a composite photocatalytic material of carbon nitride and bismuth oxyhalide and a preparation method of thecomposite photocatalytic material. The composite photocatalytic material provided by the invention is provided with a layered structure in which carbon nitride is denoted as g-C3N4, bismuth oxyhalideis denoted as BiOXaYb, wherein X and Y represent Cl, Br or I, X is not equal to Y, and the sum of a and b is 1; according to the preparation method, a precursor of g-C3N4 is placed in a muffle furnace to be calcined to obtain g-C3N4, then g-C3N4 is mixed with bismuth nitrate pentahydrate, a surfactant and polyols; two of potassium chloride, potassium bromide and potassium iodide solutions are added; the pH value of the mixed solution is adjusted; an obtained sample is subjected to suction filtration or centrifugation, washed to neutrality, dried, and ground to prepare the composite photocatalytic material of g-C3N4 and BiOXaYb. The composite material has the characteristic of high-efficiency visible light response, and can efficiently catalyze the degradation of emerging organic pollutants represented by bisphenol A in sewage (waste) water under visible light conditions. The preparation method provided by the invention is simple in process, easy to operate, high in output, low in energy consumption, mild in preparation conditions and environmentally-friendly.

Description

technical field [0001] The invention belongs to the technical field of photocatalysts, in particular to a photocatalyst and a preparation method thereof, in particular to a carbon nitride (g-C 3 N 4 ) with bismuth oxyhalide (BiOX a Y b ) composite photocatalytic material and its preparation method. Background technique [0002] As a typical representative of bismuth oxyhalide materials, bismuth oxychloride (BiOCl) is widely used in the field of photocatalysis due to its stable chemical properties, non-toxicity, corrosion resistance, excellent photochemical properties and layered structure. However, BiOCl only responds to ultraviolet light due to its wide energy bandgap, which greatly limits its practical application value. The introduction of halogen atoms (such as Br, I, etc.) can further improve the response to visible light. At the same time, the graphite-phase non-metallic semiconductor carbon nitride (g-C 3 N 4 ) exhibits a response to visible light due to its na...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C02F1/30C02F101/34
CPCC02F1/30B01J27/24C02F2305/10C02F2101/345B01J35/39
Inventor 李洪静胡晓楠
Owner FUDAN UNIV
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