Preparation method of photocatalyst for removing phenols incretion interferent in water

A technology of endocrine disruptors and photocatalysts, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, water pollutants, etc., can solve the problems of complex synthesis methods, high cost, poor stability, etc., achieve wide sources and reduce preparation The effect of simple cost and materials

Active Publication Date: 2009-06-17
TSINGHUA UNIV
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Problems solved by technology

Since only less than 4% of the light energy in sunlight is ultraviolet light, and artificial ultraviolet light sources have high energy consumption, high cost, and poor stability, a new visible light-responsive photocatalyst is developed, and oxygen in the air is used as an oxidant to effectively degrade toxic Organic pollutants become a ke

Method used

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  • Preparation method of photocatalyst for removing phenols incretion interferent in water
  • Preparation method of photocatalyst for removing phenols incretion interferent in water
  • Preparation method of photocatalyst for removing phenols incretion interferent in water

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Example Embodiment

[0020] Example 1

[0021] 1) At room temperature, immerse 1 g of sodium bismuth into a mixed solution of 20 ml of water and 20 ml of ethanol;

[0022] 2) under the condition of continuous stirring, add 8ml of hydrochloric acid (37wt%), hydrobromic acid (40wt%) or hydroiodic acid (45wt%) dropwise, continue stirring for 0.5h, and filter;

[0023] 3) The filtered product is placed in the air and dried at 50° C. for 4 hours to obtain BiOX (wherein X is Cl, Br or I) photocatalyst.

[0024] from figure 1 (a), figure 1 (b) and figure 1 In (c), it can be seen that the BiOX (X=Cl, Br or I) type catalysts have a sheet-like micromorphology, the thicknesses are concentrated at 87±20, 35±6 and 68±15 nm, and the grain sizes are concentrated at 690±110, 600±100 and 150±60nm.

[0025] In addition, X-ray polycrystalline diffraction analysis showed that the crystals of BiOX (X is Cl, Br or I) belong to the tetragonal system, and the space group is p4 / nmm (129). 2.75 and 1.76eV.

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Abstract

The invention discloses a method for preparing photocatalysts capable of removing oxygen bismuth halide BiOX (X is Cl, Br or I) of endocrine disruptors in a water body in the field of water treatment technology and environmental functional materials. The method comprises the steps of taking NaBiO3 as oxidant, taking hydrogen halide aqueous solution as a reducing agent and obtaining the BiOX photocatalysts with a flaky microstructure through simple impregnation, solid-liquid separation, drying and other steps. Photocatalysis experiment shows that the photocatalysts all show certain photo-catalytic activity under the irradiation of a xenon-lamp light source, and have the removing effects superior to the prior commercialized photocatalyst P25 under the same reaction conditions, wherein because a BiOI photocatalyst has a narrow forbidden band, the energy of visible light can be fully utilized, and after reaction is carried out for 3 hours, the rate of removing four phenols endocrine disruptors, namely 4-tert-octylphenol, 4-nonyl phenol, sodium pentachlorophenate and bisphenol A, is over 50 percent, and the rate of removing the sodium pentachlorophenate is over 95 percent.

Description

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Claims

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Application Information

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Owner TSINGHUA UNIV
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