Synthesis of agi/bioi/bipo by ion exchange 4 Heterojunction photocatalyst and its use

Abstract

The invention provides a AgI / BiOI / BiPO 4 Preparation method and application of heterojunction photocatalyst. First, 1.46 g of Bi(NO 3 ) 3 .5H 2 O was dissolved in 30 mL of N,N-dimethylformamide (DMF) solvent, and then 0.5 g of KI was dissolved in 30 mL of water and dropped into the bismuth nitrate solution. After stirring for 4 h, the obtained precipitate was used Washed with ethanol and water, and dried at 60 °C to obtain BiOI. Dissolve 0.5‑2 mmol of silver source in 20 mL of water, add 0.5 g of BiOI, stir for 1 h to obtain a suspension, dissolve 0.5‑2 mmol of phosphate in 10 mL of water and drop into the suspension , continue stirring for 1 h, the obtained product was washed with ethanol and water, and dried at 60°C to obtain AgI / BiOI / BiPO 4 heterojunction photocatalysts. The AgI / BiOI / BiPO prepared by the present invention 4 Phase-heterojunction photocatalysts are used to degrade organic pollutants in water. Compared with pure-phase AgI, BiPO 4 And BiOI photocatalysts have higher visible light catalytic activity.

Description

technical field [0001] The invention belongs to the field of photocatalysis, and in particular relates to a preparation method and application of a heterojunction photocatalyst. Background technique [0002] Endocrine disruptors (EDCs) can affect the reproduction of organisms or humans by interfering with the synthesis, secretion, transport, binding, reaction and metabolism of natural hormones produced in the body to maintain their own balance and regulate developmental processes. Exogenous chemicals that affect the functions of the nervous system, nervous system, and immune system. Studies have shown that EDCs can have adverse effects on the human body, including endocrine toxicity, reproductive toxicity, neurotoxicity, immunotoxicity, ecotoxicity, and genotoxicity. According to the source classification of EDCs, they can be divided into two categories: natural and synthetic compounds, including estradiol, estrone, estriol, and testosterone. These substances are currently...

AI Technical Summary

Problems solved by technology

[0011] 1. The synthesis method is complex and the production cost is high;

[0012] 2. The temperature required in the reaction process or calcination process is high, the synthesis time is long, the energy consumption is high, and the synthesis cost is also increased;

[0013] 3. For BiPO 4 The modification still stays in the ultraviolet region, and the utilization of the light source is still not sufficient, and there are limitations;

[0014] 4. Even for BiPO 4 The modification can be extended to visible light, but the activity of the catalyst is still very low, and the efficient and rapid removal of organic pollutants cannot be achieved.

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