Preparation method of photocatalyst for removing phenols incretion interferent in water

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

technical field [0001] The invention relates to a preparation method of a photocatalyst that can be used for removing phenolic endocrine disruptors in water, and belongs to the fields of water treatment technology and environmental functional materials. Background technique [0002] Phenolic endocrine disruptors, represented by nonylphenol, are widely found in air, water, soil, food, and living organisms, and can be ingested by the human body through various channels, seriously interfering with the normal function of hormones (hormones) in the body, causing metabolic disorders , birth defects, growth and development disorders and other serious hazards, and cause a series of negative effects on future generations. Conventional sewage treatment processes cannot effectively remove such endocrine disruptors. At the same time, many phenolic endocrine disruptors (such as nonylphenol) are easily adsorbed in sludge due to their strong lipophilicity and hygroscopicity, resulting in s...

AI Technical Summary

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 key scientific issue in the field of photocatalysis

However, the synthesis method of the above method is relatively complicated, and external equipment (such as hydrothermal high-pressure reactor, ultrasonic machine, etc.) is required, and the preparation cycle is long, so it is difficult to achieve a large amount of preparation in a short time.

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