AgI/BiOI/BiPO4 heterojunction photocatalyst synthesized via ion exchange method and application thereof

Abstract

The invention provides a preparation method and application of an AgI / BiOI / BiPO4 heterojunction photocatalyst. The preparation method includes: dissolving 1.46 g of Bi(NO3)3.5H2O in 30 mL of N,N-dimethylformamide (DMF) solvent, dissolving 0.5 g of KI in 30 mL of water, dropwise adding into bismuth nitrate solution, stirring for 4 h, washing obtained precipitate with ethanol and water, and drying at 60 DEG C to obtain BiOI; dissolving 0.5-2 mmol of a silver-source material in 20 mL of water, adding 0.5 g of BiOI, stirring for 1 h to obtain a suspension, dissolving 0.5-2 mmol of a phosphate in 10 mL of water, dropwise adding into the suspension, continuing to stir for 1 h to obtain a product, washing the product with ethanol and water, and drying at 60 DEG C to obtain the AgI / BiOI / BiPO4 heterojunction photocatalyst. When applied to the degradation of organic pollutants in water, the AgI / BiOI / BiPO4 heterojunction photocatalyst prepared herein has higher visible light catalytic activity than pure-phase AgI, BiPO4 and BiOI photocatalysts.

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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