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Preparation method and application of visible-light-responsive Bi3O4Cl/g-C3N4 heterojunction material

A visible light, heterojunction technology, applied in chemical instruments and methods, light water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem of low photocatalytic activity, limited absorption range, unsatisfactory photocatalytic activity, etc. problem, to achieve the effect of simple process, easy mass production and excellent photocatalytic activity

Inactive Publication Date: 2017-10-20
HOHAI UNIV
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Problems solved by technology

However, a single g-C 3 N 4 The photocatalytic activity under available light is not ideal, which may be due to the g-C 3 N 4 The absorption range of visible light is limited, and photogenerated carriers are relatively easy to recombine, resulting in low photocatalytic activity
On the other hand, bismuth oxychloride (Bi 3 o 4 Cl), as an important metal oxide, a small amount of Bi 3 o 4 The combination of Cl and semiconductor to form a heterojunction can significantly enhance the photocatalytic performance, such as: Bi 3 o 4 Cl / AgCl, Bi 3 o 4 Cl / BiOCl and WO 3 / Bi 3 o 4 Cl et al., however, so far no Bi 3 o 4 Cl and g-C 3 N 4 Preparation and photocatalytic application of composite heterojunction

Method used

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  • Preparation method and application of visible-light-responsive Bi3O4Cl/g-C3N4 heterojunction material
  • Preparation method and application of visible-light-responsive Bi3O4Cl/g-C3N4 heterojunction material
  • Preparation method and application of visible-light-responsive Bi3O4Cl/g-C3N4 heterojunction material

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preparation example Construction

[0023] A visible light responsive Bi 3 o 4 Cl / g-C 3 N 4 A method for preparing a heterojunction material, comprising the following steps:

[0024] Step 1) Dry the urea in an oven, put it into a crucible after grinding, heat up for the first time and calcine, put it into a nitric acid solution after calcination, wash and dry it with water after stirring, put it into the crucible again after grinding, and heat up for the second time Calcined to finally get flake g-C 3 N 4 ;

[0025] Step 2) Bi(NO 3 ) 3 ·5H 2 O is ultrasonically dispersed in ethylene glycol, and solution A is obtained after stirring ultrasonically; the NH4 Cl was dissolved in deionized water to obtain solution B, and solution B was slowly added to the above solution A to form a white turbid liquid, which was transferred to the reaction kettle for hydrothermal reaction, and the reaction kettle was cooled to room temperature, washed with water and ethanol, and dried to obtain Solid powder C; finally, put t...

Embodiment 1

[0031] Step 1: Put 10g of urea in an oven at 80°C to dry for 24 hours, put it into a crucible after grinding, and calcinate at 550°C for 4 hours with a heating rate of 2°C / min. After calcination, put it into 1mol / L nitric acid solution, stir for 24h, wash and dry with water, grind again and put it into a crucible, and calcinate at 500°C for 4h with a heating rate of 5°C / min. End up with flaky g-C 3 N 4 .

[0032] Step 2: First, 0.485g Bi(NO 3 ) 3 ·5H 2 O was ultrasonically dispersed in 10 mL of ethylene glycol and stirred for 10 min to obtain solution A.

[0033] Next, add 0.018g NH 4 Dissolve Cl in 25mL deionized water to obtain solution B. Slowly add solution B to the above solution A to form a white turbid solution, transfer it to a 50mL reaction kettle, and heat at 160°C for 12h. After the reactor was cooled to room temperature, the sample was washed with water and ethanol, and dried to obtain solid powder C.

[0034] Finally, the solid powder C was calcined in a m...

Embodiment 2

[0037] Step 1: Put 10g of urea in an oven at 80°C to dry for 24 hours, put it into a crucible after grinding, and calcinate at 550°C for 4 hours with a heating rate of 2°C / min. After calcination, put it into 1mol / L nitric acid solution, stir for 24h, wash and dry with water, grind again and put it into a crucible, and calcinate at 500°C for 4h with a heating rate of 5°C / min. End up with flaky g-C 3 N 4 .

[0038] Step 2: First, 0.485g Bi(NO 3 ) 3 ·5H 2 O was ultrasonically dispersed in 10 mL of ethylene glycol and stirred for 10 min to obtain solution A.

[0039] Next, add 0.018g NH 4 Dissolve Cl in 25mL deionized water to obtain solution B. Slowly add solution B to the above solution A to form a white turbid solution, transfer it to a 50mL reaction kettle, and heat at 160°C for 12h. After the reactor was cooled to room temperature, the sample was washed with water and ethanol, and dried to obtain solid powder C.

[0040] Finally, the solid powder C was calcined in a m...

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Abstract

The invention discloses a preparation method of a visible-light-responsive Bi3O4Cl / g-C3N4 heterojunction material, and belongs to the technical field of a semiconductor material. The method comprises the following steps: step 1) preparing sheet g-C3N4; step 2) preparing Bi3O4Cl nanosheets; and step 3) taking Bi3O4Cl nanosheets and sheet g-C3N4, fully grinding the obtained product in a mortar, and performing calcination to finally obtain Bi3O4Cl / g-C3N4. According to the preparation method, a bismuth oxychloride (Bi3O4Cl) and carbon nitride (g-C3N4) heterojunction photocatalyst is synthesized through a grinding calcination method. The method is simple in process, low in reaction cost and convenient for massive production, is non-toxic and harmless, and meets the eco-friendly requirement. Another object of the invention is to provide an application of the visible-light-responsive Bi3O4Cl / g-C3N4 heterojunction material. The material is used for degrading tetracycline in visible light and shows excellent photocatalytic activity during tetracycline degradation in visible light.

Description

technical field [0001] The invention belongs to the technical field of semiconductor materials, in particular to a visible light responsive Bi 3 o 4 Cl / g-C 3 N 4 Preparation methods and applications of heterojunction materials. Background technique [0002] In recent years, with the continuous development of the economy, energy and environmental problems around the world have become more and more serious. In particular, the large-scale application of antibiotics in pharmaceutical personal care products and animal husbandry has made the pollution of antibiotics in the water environment a hot issue in current research. At present, photocatalytic technology is an emerging pollution control technology, which has the advantages of high efficiency and mild reaction conditions. [0003] As early as 1972, Japanese scholars Fujishima and Honda studied TiO 2 The discovery that electrodes cause water splitting to produce hydrogen has led to the rapid development of basic research...

Claims

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Application Information

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IPC IPC(8): B01J27/24C02F1/30C02F101/34C02F101/36C02F101/38
CPCC02F1/30B01J27/24C02F2305/10C02F2101/34C02F2101/38C02F2101/36B01J35/39Y02W10/37
Inventor 陆光华江润仁闫振华孙红伟周冉冉董慧科沈杰
Owner HOHAI UNIV
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