Hydrothermal method preparation technology for BiVO4 nanowires

A technology of preparation process and hydrothermal method, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of high cost, cumbersome process, complicated preparation equipment, etc., and achieve good shape characteristics , high photocatalytic activity and simple preparation process

Active Publication Date: 2017-05-31
NORTHWEST NORMAL UNIVERSITY
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  • Application Information

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Problems solved by technology

But the above method has the following disadvantages: 1, the preparation device is complicated, the process is loaded down with trivial details, and the cost is high; 2, the preparation process is carried out in the Erlenmeyer flask, it is inconvenient to take and place the FTO, and it is easy to damage the sample; 3, the maximum temperature of the water bath heating can only be Reaching 100°C, it is impossible to consider the effect of higher temperature on BiVO 4 Effects of nanowire growth

Method used

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  • Hydrothermal method preparation technology for BiVO4 nanowires
  • Hydrothermal method preparation technology for BiVO4 nanowires
  • Hydrothermal method preparation technology for BiVO4 nanowires

Examples

Experimental program
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Effect test

Embodiment 1

[0022] BiVO 4 The hydrothermal preparation process of nanowires is as follows:

[0023] Weigh 5 mmol of bismuth nitrate, 5 mmol of ammonium metavanadate and 10 mmol of citric acid and dissolve in 15 mL of 23.3% HNO 3 solution to form A solution; take 8mL A solution in a 50mL glass beaker, add 0.48g PVA and 2mL acetic acid, stir until completely dissolved, and obtain viscous BiVO 4 blue seed solution; step BiVO 4 The seed solution was spin-coated on clean FTO glass, placed in a muffle furnace, heated to 400 °C at a rate of 2 °C / min, and calcined for 5 h to obtain BiVO 4 Seed layer, placed in the Teflon liner of the reactor; in a 50mL glass beaker, add 16mL deionized water and 4mL HNO 3 , stir to make it evenly mixed, then add 1mmol of ammonium metavanadate and 1mmol of bismuth nitrate, after it is completely dissolved, add 5.7g of NaHCO 3 , after stirring for 30 minutes, transferred to the polytetrafluoroethylene lining of the above reaction kettle, reacted at 120 °C for 6 ...

Embodiment 2

[0027] BiVO 4 The hydrothermal preparation process of nanowires is as follows:

[0028] Weigh 3mmol of bismuth nitrate, 3mmol of ammonium metavanadate and 8mmol of citric acid dissolved in 18mL of 23.3% HNO 3 solution to form A solution; take 6mL A solution in a 50mL glass beaker, add 0.52g PVA and 1.5mL acetic acid, stir until completely dissolved, and obtain viscous BiVO4 Blue seed solution; the step BiVO was spin-coated 4 The seed solution was spin-coated on clean FTO glass, placed in a muffle furnace, heated to 400 °C at a rate of 2 °C / min, and calcined for 4 h to obtain BiVO 4 Seed layer, placed in the polytetrafluoroethylene liner of the reactor; in a 50mL glass beaker, add 18mL deionized water and 5mL HNO 3 , stir to make it evenly mixed, then add 0.5mmol of ammonium metavanadate and 0.5mmol of bismuth nitrate, and add 5.0g of NaHCO after it is completely dissolved 3 , after stirring for 20 min, transferred to the polytetrafluoroethylene lining of the above reaction ...

Embodiment 3

[0030] BiVO 4 The hydrothermal preparation process of nanowires is as follows:

[0031] Weigh 4mmol of bismuth nitrate, 4mmol of ammonium metavanadate and 9mmol of citric acid and dissolve them in 20mL of 23.3% HNO 3 solution to form A solution; take 7mL A solution in a 50mL glass beaker, add 0.64g PVA and 1.8mL acetic acid, stir until completely dissolved, and obtain viscous BiVO 4 Blue seed solution; the step BiVO was spin-coated 4 The seed solution was spin-coated on clean FTO glass, placed in a muffle furnace, heated to 400 °C at a rate of 2 °C / min, and calcined for 6 h to obtain BiVO 4 Seed layer, placed in the polytetrafluoroethylene liner of the reaction kettle; in a 50mL glass beaker, add 20mL deionized water and 6mL HNO 3 , stir to make it evenly mixed, then add 0.8mmol of ammonium metavanadate and 0.7mmol of bismuth nitrate, and add 5.3g of NaHCO after it is completely dissolved 3 , after stirring for 25min, transferred to the polytetrafluoroethylene lining of th...

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Abstract

The invention discloses a hydrothermal method preparation technology for BiVO4 nanowires and belongs to the technical field of semiconductor nanomaterial preparation. The hydrothermal method preparation technology comprises the steps: firstly, spin coating and calcining a BiVO4 seed solution on FTO glass to obtain a BiVO4 seed layer; then preparing BiVO4 nanowires in a reaction kettle through a hydrothermal method; finally, putting the prepared BiVO4 nanowires in a tube furnace to be annealed in high temperature. The hydrothermal method preparation technology disclosed by the invention is simple in preparation process, easy to operate, free of expensive equipment in the whole preparation process and low in cost; the prepared BiVO4 nanowires have good crystal form and high photocatalytic activity; the preparation process is performed in the reaction kettle, so that the FTO glass is convenient to take and put, and a sample is prevented from being damaged; furthermore, temperature in the reaction kettle can be very high, so that an effect of reaction temperature larger than 100 DEG C on growth of the BiVO4 nanowires can be explored. The hydrothermal method preparation technology disclosed by the invention has no toxic or harmful matter generation in the whole preparation process, has no pollution on environment, has no harm to human health and is safe and environment-friendly.

Description

technical field [0001] The invention belongs to the technical field of semiconductor nanomaterial preparation, in particular to a BiVO 4 Hydrothermal preparation process of nanowires. Background technique [0002] At present, environmental pollution and energy shortage are major challenges that people are facing, and they are also the priority problems to be solved in the implementation of development strategies in our country. Therefore, the importance of developing green, low-carbon and environmental protection technologies has become increasingly prominent. In recent years, photocatalysis has developed rapidly as a green and low-carbon technology. It can directly use sunlight to catalyze the degradation of organic pollutants in water and air, and can convert solar energy into chemical energy and utilize it. Therefore, in the control of environmental pollution and the development of new energy sources, photocatalytic technology has great potential. [0003] Among the rep...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G31/00B82Y30/00B82Y40/00B01J23/22
CPCB01J23/22C01G31/00C01P2002/80C01P2004/03C01P2004/16
Inventor 秦冬冬耿园园段世芳李洋王秋红贺彩花权晶晶
Owner NORTHWEST NORMAL UNIVERSITY
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