Method for synthesizing carbon-doped BiVO4 photocatalyst by using microwave hydrothermal method

A microwave hydrothermal method and photocatalyst technology, which is applied in chemical instruments and methods, catalyst activation/preparation, physical/chemical process catalysts, etc., can solve the problems of high carrier recombination rate, low quantum efficiency, and limited applications. Achieve the effect of low cost, simple operation and fast response

Active Publication Date: 2013-04-03
SHAANXI UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[Zhang Aiping, Zhang Jinzhi. Molecular Catalysis. 2010,51-56.] However, due to pure BiVO 4 The high carrier recombination rate and low quantum efficiency of the catalyst lead to its low photocatalytic activity, which greatly limits its application in the fields of photocatalytic oxidation of organic pollutants and photolysis of water.

Method used

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  • Method for synthesizing carbon-doped BiVO4 photocatalyst by using microwave hydrothermal method
  • Method for synthesizing carbon-doped BiVO4 photocatalyst by using microwave hydrothermal method
  • Method for synthesizing carbon-doped BiVO4 photocatalyst by using microwave hydrothermal method

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Embodiment 1

[0028] Synthesis of carbon-doped BiVO by a microwave hydrothermal method 4 A photocatalyst method comprising the steps of:

[0029] Step 1: Add 0.01mol Bi(NO 3 ) 3 ·5H 2 O was dissolved in 25ml deionized water, and stirred for 40min to obtain a bismuth salt solution, and 0.01mol NH 4 VO 3 Dissolve in 25ml of deionized water at 90°C, heat and stir for 30 minutes to obtain a vanadium salt solution, mix the bismuth salt solution and vanadium salt solution according to the molar ratio of Bi:V=1:1 to form a mixed solution;

[0030] Step 2: Dilute glucose according to C 6 h 12 o 6 : Bi(NO 3 ) 3 ·5H 2 Add the molar ratio of O=0.01:1 to the mixed solution prepared in step 1, and magnetically stir for 20 minutes to form a precursor;

[0031] Step 3: Put the precursor into a polytetrafluoroethylene-lined reaction kettle, put the reaction kettle into a microwave hydrothermal instrument, and select the microwave temperature control mode: from room temperature to 100°C, with a mic...

Embodiment 2

[0033] Synthesis of carbon-doped BiVO by a microwave hydrothermal method 4 A photocatalyst method comprising the steps of:

[0034] Step 1: Add 0.01mol Bi(NO 3 ) 3 ·5H 2 O was dissolved in 25ml deionized water, and stirred for 40min to obtain a bismuth salt solution, and 0.01mol NH 4 VO 3 Dissolve in 25ml of deionized water at 90°C, heat and stir for 30 minutes to obtain a vanadium salt solution, mix the bismuth salt solution and vanadium salt solution according to the molar ratio of Bi:V=1:1 to form a mixed solution;

[0035] Step 2: Dilute glucose according to C 6 h 12 o 6 : Bi(NO 3 ) 3 ·5H 2 The molar ratio of O=0.05:1 was added to the mixture, and magnetically stirred for 20 minutes to form a precursor;

[0036] Step 3: Put the precursor into a polytetrafluoroethylene-lined reaction kettle, put the reaction kettle into a microwave hydrothermal instrument, and select the microwave temperature control mode: from room temperature to 100°C, with a microwave power of...

Embodiment 3

[0038] Synthesis of carbon-doped BiVO by a microwave hydrothermal method 4 A photocatalyst method comprising the steps of:

[0039] Step 1: Add 0.01mol Bi(NO 3 ) 3 ·5H 2 O was dissolved in 25ml deionized water, and stirred for 40min to obtain a bismuth salt solution, and 0.01mol NH 4 VO 3 Dissolve in 25ml of deionized water at 90°C, heat and stir for 30 minutes to obtain a vanadium salt solution, mix the bismuth salt solution and vanadium salt solution according to the molar ratio of Bi:V=1:1 to form a mixed solution;

[0040] Step 2: Dilute glucose according to C 6 h 12 o 6 : Bi(NO 3 ) 3 ·5H 2 Add the molar ratio of O=0.10:1 into the mixture, and stir it magnetically for 20 minutes to form a precursor;

[0041] Step 3: Put the precursor into a polytetrafluoroethylene-lined reaction kettle, put the reaction kettle into a microwave hydrothermal instrument, and select the microwave temperature control mode: from room temperature to 100°C, with a microwave power of 300...

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Abstract

The invention relates to a method for synthesizing carbon-doped BiVO4 photocatalyst by using a microwave hydrothermal method. The method comprises the following steps: dissolving Bi(NO3)3.5H2O and NH4VO3 into deionized water respectively, and mixing according to the molar ratio of Bi:V=1:1 to obtain a mixed liquor; adding glucose into the mixed liquor according to the molar ratio of C6H12O6:Bi(NO3)3.5H2O=(0.01-0.15):1 and stirring uniformly to form a precursor; and placing the precursor into a reaction kettle, setting the reaction temperature to be 200 DEG C, insulating for 40 min, taking out generated sediment, washing and drying, so as to obtain the carbon-doped BiVO4 photocatalyst. According to the invention, the microwave hydrothermal method is adopted to synthesize the carbon-doped BiVO4 photocatalyst with one step, and calcination is not needed, so that the operation is simple, and the synthesized carbon-doped BiVO4 photocatalyst has favorable photocatalytic activity, as a result, the purpose of modifying BiVO4 is achieved.

Description

【Technical field】 [0001] The invention belongs to the field of functional materials, in particular to a microwave hydrothermal method for synthesizing carbon-doped BiVO 4 photocatalytic method. 【Background technique】 [0002] In recent years, with the rapid development of the global economy, the problem of global environmental pollution and sustainable energy shortage has become increasingly serious. Therefore, it has become an urgent problem to be solved in the world to find an effective way to govern the environment and solve energy problems. Many metal oxide semiconductor materials such as BiVO 4 、BiWO 6 、 Bi 2 o 3 、WO 3 , Fe 2 o 3 、Cu 2 O, etc. have attracted extensive attention because of their photocatalytic degradation of pollutants and photolysis of water to produce hydrogen and oxygen. Among them, BiVO 4 Because of its narrow band gap (about 2.4eV), high photochemical stability, strong redox ability, non-toxicity, and low cost, it has been increasingly use...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/22B01J37/34
Inventor 谈国强张丽丽任慧君
Owner SHAANXI UNIV OF SCI & TECH
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