Method for preparing nitrogen-doped bismuth tungstate powder photocatalyst through microwave hydrothermal method

A microwave hydrothermal method and photocatalyst technology, applied in chemical instruments and methods, catalyst activation/preparation, physical/chemical process catalysts, etc., can solve the problem of low utilization of sunlight, low photocatalytic activity, small specific surface area, etc. problem, to achieve the effect of no hysteresis effect, high photocatalytic activity, and large specific surface area
CN102553569AInactive Publication Date: 2012-07-11SHAANXI UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHAANXI UNIV OF SCI & TECH
Publication Date
2012-07-11
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a method for preparing a nitrogen-doped bismuth tungstate powder photocatalyst through a microwave hydrothermal method. The method comprises the following steps of: adding de-ionized water into bismuth nitrate pentahydrate and sodium tungstate dihydrate serving as raw materials and urea serving as an N source, stirring to uniformly mix the raw materials, stopping the stirring and producing white precipitate; placing in an ultrasonic instrument to perform ultrasonic treatment for 10-30 minutes; performing complete precipitation reaction to obtain precursor of microwave hydrothermal reaction; transferring the precursor into a reaction kettle; reacting by using the microwave hydrothermal method for 30-90 minutes at 160-200 DEG C; and taking out of the reaction kettle, collecting the precipitate, cleaning and drying. The method has the advantages of low reaction temperature of about 180 DEG C and short reaction time of probability 50-60 minutes; and the prepared powder has high reaction activity and low energy consumption and is environmentally-friendly.
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Description

technical field

[0001] The invention belongs to the field of functional materials, and relates to a method for preparing a nitrogen-doped bismuth tungstate powder photocatalyst by a microwave hydrothermal method. Background technique

[0002] Photocatalysis is one of the unique properties of semiconductors. The use of semiconductor photocatalysts can photolyze water to produce hydrogen, purify indoor air, photocatalytic self-cleaning, anti-mildew, photocatalytic antibacterial, photocatalytic sewage treatment, etc. Photocatalytic technology plays an important role in pollution control It has broad application prospects in protecting the environment, developing new energy sources and changing the energy structure.

[0003] The traditional photocatalyst titanium dioxide (TiO 2 ) has the advantages of low cost, non-toxicity, high stability, and easy preparation. 2 The forbidden band width is large, and it has photocatalytic activity only under the irradiation of ultraviolet li...

Claims

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