1. Simple Preparation of Waste Boron Nitride/C3N4 Composites and Simulated Solar Photocatalytic Performance.
- Author
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Cui, Liang, Zhang, Wangxi, Zheng, Xinyang, Zhao, Shikai, Liang, Baoyan, and Jiao, Mingli
- Subjects
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BORON nitride , *RAW materials , *PHOTOCATALYSTS , *CYANIDES , *RADICALS (Chemistry) - Abstract
In industrial production, the preparation of cubic boron nitride (cBN) under high temperature and pressure wastes a large amount of unreacted hexagonal boron nitride (hBN). This study aims to use this BN waste (wBN) as a raw material, composite it with g-C3N4 to construct wBN/g-C3N4 composites, and apply the composites in the field of photocatalysis. wBN/g-C3N4 composites were prepared by simple calcination using wBN and ammonium cyanide as raw materials. Results showed that a heterogeneous structure was formed in the composite photocatalyst, with a decrease in its bandgap width and a significant increase in its ability to absorb light. The simulated sunlight photocatalytic activity of composite photocatalysts was significantly better than that of single wBN or g-C3N4. The photocatalytic performance of B2 sample, composed of a 4:3 ratio of wBN and melamine in the raw materials, demonstrated the highest efficiency. Under simulated solar illumination, it was capable of degrading 99.3% of MB within 60 min. The experimental results with additional capture agents indicated that the main reactive species of the composite photocatalyst were superoxide radicals (·O2−) and holes (h+). [ABSTRACT FROM AUTHOR]
- Published
- 2024
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