具有三维花球状结构的钼酸铋在模拟太阳光照射下降解双氯芬酸钠

doi:10.11896/cldb.23050078

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Abstract Bismuth molybdate (Bi₂MoO₆, BMO), as a good visible light responsive photocatalyst in bismuth based photocatalysts, has attracted widespread attention due to its non-toxic, low-cost, rich morphology, and excellent optical and chemical properties. Notably, the photocatalytic performance of bismuth molybdate is strongly influenced by its morphology and structure. Up to now, researchers have used different methods to synthesize bismuth molybdate under different pH, temperature, solvent, reaction time and surfactant conditions, in order to obtain various sizes and morphology of bismuth molybdate, including zero-dimensional, one-dimensional, two-dimensional and three-dimensional structures. Among them, the three-dimensional structure of BMO possesses better photodegradation activity for pollutants, as they provide good light capture, short photocarriers diffusion path route and rich active site. Herein, our study, here, use a simple solvothermal reaction to synthesize different time series of Bi₂MoO₆. Firstly, the experimental results show that BMO-24 (solvothermal time of 24 h) exhibits good carrier mobility, which possesses the best visible light driven photocatalytic efficiency. And after visible-light illumination for 300 min, 80% of diclofenac sodium (DCF) had been degraded. Furthermore, we analyze the phase composition, microstructure morphology, optical properties and electrochemical performance of Bi₂MoO₆. The results show that the change of solvothermal time has an important effect on the surface morphology, pore structure, active site and photocatalytic performance of Bi₂MoO₆. Finally, we conducted free radical capture experiments in order to further determine the involvement of active radical. On this basis, we found that ·O₂^- and h⁺ radicals are the main active species, playing a decisive role in the degradation react. In addition, after four cycles, Bi₂MoO₆ still exhibits excellent stability performance. This work provides a more reasonable design and guidance for the high-performance photocatalytic degradation of pollutants in water using photocatalysts.

Key words： bismuth molybdate diciofenac sodium (DCF) photocatalysis 3D flower-ball-like solvothermal method

Published: 25 October 2024 Online: 2024-11-05

CLC number:

O643

Fund:Liaoning Revitalization Talents Program (XLYC1907173), the Science and Technology General Project of Liaoning Provincial Education Department (LJKMZ20221835).

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	CHEN Junlin
	CHANG Chun

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CHEN Junlin,CHANG Chun. 3D Flower-ball-like Bismuth Molybdate Photocatalytic Degradation Diclofenac Sodium Under Simulate Visible-light[J]. Materials Reports, 2024, 38(20): 23050078-9.

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http://www.mater-rep.com/EN/10.11896/cldb.23050078 OR http://www.mater-rep.com/EN/Y2024/V38/I20/23050078

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