AI Article Synopsis
- The study outlines the synthesis of bismuth oxychloride/bismuth oxybromide/graphitic carbon nitride (BiOCl/BiOBr/g-CN) nano-composites using a controlled hydrothermal method, examining their structure and properties with various techniques.
- Under visible light, the photocatalyst effectively degraded pollutants like crystal violet and 2-hydroxybenzoic acid, achieving the best performance with a specific composite that showed a 1.5 times higher reaction rate constant compared to another sample.
- The research also identifies reactive hydroxyl radicals as the main contributors to the degradation process and suggests that these composite materials may have future applications in environmental pollution control.
Article Abstract
The first systematic synthesis of bismuth oxychloride/bismuth oxybromide/graphitic carbon nitride (BiOCl/BiOBr/g-CN) nano-composites used a controlled hydrothermal method. The structure, morphology and characteristic of BiOCl/BiOBr/g-CN photocatalyst were measured by XRD, UV-vis-DRS, FT-IR, FE-TEM, FE-SEM-EDS, PL, BET, HR-XPS and EPR. Under visible light irradiation, the photodegradation activity was evaluated for the decolorization of crystal violet (CV) and 2-hydroxybenzoic acid (2-HBA) in aqueous solution. The catalytic performance showed that, when using sample BB2C1-4-250-30 wt% g-CN composite as a photocatalyst, the best reaction-rate-constant (k) was 0.071 h. It was 1.5 times higher than the k value of BB2C1-4-250 as a photocatalyst. From the scavenging effect of various scavengers, the results of EPR showed that reactive OH was the main scavenger, while O, h and O were the second scavenger in CV degradation. In this study, a possible photodegradation mechanism was proposed and discussed. In this work, our method of BiOCl/BiOBr/g-CN preparation could be used for future mass production and the BiOCl/BiOBr/g-CN composite materials could be applied to the environmental pollution control in future.
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| http://dx.doi.org/10.1016/j.jenvman.2021.113256 | DOI Listing |
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