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Visible-light response Ag/Bi3O4Cl composite material as well as preparation method and application thereof

A composite material and visible light technology, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, light water/sewage treatment, etc., can solve the problem of poor separation efficiency of photogenerated electrons and holes, unsatisfactory photocatalytic activity and visible light utilization efficiency. Degradability and other issues

Inactive Publication Date: 2018-10-09
JIANGSU UNIV
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Problems solved by technology

[0003] Recently, a green semiconductor bismuth oxychloride (Bi 3 o 4 Cl), due to its good chemical and thermal stability, low cost, safety and non-toxicity, has gradually attracted the attention of researchers in the field of photocatalysis; bismuth oxychloride (Bi 3 o 4 Cl) is an important metal oxide with a bandgap width of about 2.7eV, and is a good visible light responsive material. At present, bismuth oxychloride (Bi 3 o 4 Cl) has been reported in the photocatalytic degradation of pollutants; however, a single bismuth oxychloride (Bi 3 o 4 Cl) materials have unsatisfactory photocatalytic activity and visible light utilization efficiency due to their poor degradation performance and poor separation efficiency of photogenerated electrons and holes. In recent years, bismuth oxychloride (Bi 3 o 4 Cl) composite system is an effective strategy to improve its photocatalytic performance, because it can effectively improve the separation of photogenerated electron-hole pairs
On the other hand, silver (Ag), as an important noble metal, has been found that a small amount of Ag combined with semiconductors can significantly enhance the photocatalytic performance, such as: Ag / AgCl, Ag / Bi 2 WO 6 , Ag / TiO 2 and Ag / Bi 3 TaO 7 etc., however, so far no Ag and Bi 3 o 4 Preparation of heterojunction formed by Cl recombination and report on its photocatalytic application

Method used

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  • Visible-light response Ag/Bi3O4Cl composite material as well as preparation method and application thereof
  • Visible-light response Ag/Bi3O4Cl composite material as well as preparation method and application thereof
  • Visible-light response Ag/Bi3O4Cl composite material as well as preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Step 1: Bi 3 o 4 Preparation of Cl nanosheets

[0021] 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. 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. Finally, the solid powder C was calcined in a muffle furnace at 500°C for 5h at a heating rate of 5°C / min. Finally got Bi 3 o 4 Cl nanosheets.

[0022] Step 2: Ag / Bi 3 o 4 Preparation of Cl composites

[0023] Bi 3 o 4 Cl dissolved in AgNO 3 After stirring evenly in the solution, irradiate with 250W xenon lamp for 60min, wash with water and dry to obtain Ag / Bi 3 o 4 Cl composites.

[0024] Further, Bi 3 o 4 Cl a...

Embodiment 2

[0029] Step 1: Bi 3 o 4 Preparation of Cl nanosheets

[0030] 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. 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. Finally, the solid powder C was calcined in a muffle furnace at 500°C for 5h at a heating rate of 5°C / min. Finally got Bi 3 o 4 Cl nanosheets.

[0031] Step 2: Ag / Bi 3 o 4 Preparation of Cl composites

[0032] Bi 3 o 4 Cl dissolved in AgNO 3 After stirring evenly in the solution, irradiate with 250W xenon lamp for 60min, wash with water and dry to obtain Ag / Bi 3 o 4 Cl composites.

[0033] Further, Bi 3 o 4 Cl a...

Embodiment 3

[0038] Step 1: Bi 3 o 4 Preparation of Cl nanosheets

[0039] 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. 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. Finally, the solid powder C was calcined in a muffle furnace at 500°C for 5h at a heating rate of 5°C / min. Finally got Bi 3 o 4 Cl nanosheets.

[0040] Step 2: Ag / Bi 3 o 4 Preparation of Cl composites

[0041] Bi 3 o 4 Cl dissolved in AgNO 3 After stirring evenly in the solution, irradiate with 250W xenon lamp for 60min, wash with water and dry to obtain Ag / Bi 3 o 4 Cl composites.

[0042] Further, Bi 3 o 4 Cl a...

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Abstract

The invention belongs to the technical field of semiconductor material preparation and specifically relates to a visible-light response Ag / Bi3O4Cl composite material as well as a preparation method and application thereof. The preparation method comprises the steps of dissolving Bi3O4Cl into an AgNO3 solution, evenly stirring, utilizing 250W xenon lamp to irradiate for 60min and washing and dryingto obtain the Ag / Bi3O4Cl composite material. By means of a surface Plasmon resonance effect of precious metal Ag, a separation efficiency between light-induced electrons and holes is effectively improved, and photocatalytic degradation capacity is further improved; the preparation method has the advantages of simple technology, low reaction cost, convenience in batch production and ability in meeting an environment-friendly requirement.

Description

technical field [0001] The invention belongs to the technical field of semiconductor material preparation, and utilizes a photodeposition synthesis method and a hydrothermal method to synthesize Ag / Bi in two steps 3 o 4 Cl photocatalyst for degradation of tetracycline hydrochloride under visible light. 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. The current development and utilization of solar energy is one of the important challenges to solve the current environmental crisis. In recent years, photocatalytic degradation of organic pollutants has been generally considered to be the solution to the current problem of organic com...

Claims

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Application Information

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IPC IPC(8): B01J27/06B01J37/10B01J37/34C02F1/30C02F101/34C02F101/36C02F101/38
CPCC02F1/30B01J27/06B01J37/10B01J37/344C02F2101/38C02F2101/34C02F2101/36C02F2305/10B01J35/39B01J35/23
Inventor 蒋恩慧刘春波车慧楠宋宁阮晓文
Owner JIANGSU UNIV
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