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Research on Preparation of Bamboo Charcoal Doped Bismuth-based Photocatalysts and Their Degradation of Organic Pollutants |
Received:May 13, 2024 |
DOI:10.11980/j.issn.0254-508X.2024.07.023 |
Key Words:bamboo residues bamboo charcoal photocatalysis BiOCl high-value utilization |
Fund Project:国家重点研发计划(2022YFC2105505);宜宾市竹产业“揭榜挂帅”项目“竹基浆精深加工技术研究与开发”(2022JB009);郴州国家可持续发展议程创新示范区省级专项“揭榜挂帅”项目课题(2022sfq56)。 |
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Abstract:In this study, bamboo charcoal was prepared from waste generated during bamboo pulp preparation by phosphoric acid activation method, and then bamboo charcoal/BiOCl composite catalysts were subsequently synthesized via hydrothermal method, and the effects of dosage of bamboo charcoal and hydrothermal temperature on the photocatalytic properties of the composite catalysts were systematically investigated. The results showed that the bamboo charcoal retained the inherent pore structure of bamboo, and changing the dosage of bamboo charcoal could achieve the modulation of the morphology of the bamboo charcoal/BiOCl composite catalyst, which provided a good condition for pollutant adsorption. The pronounced interactions occurring between bamboo charcoal and BiOCl significantly improved the adsorption-photocatalytic performance and oxygen vacancy content of BiOCl, so that the efficiency of photogenerated electron transfer was enhanced and the photocatalytic degradation of the composite catalyst was optimised. The composite catalyst 5BC-140 observed at the hydrothermal temperature of 140 ℃ and bamboo charcoal dosage of 5% showed the optimal visible photocatalytic properties, with the removal rate of rhodamine B reaching 86.5% within 30 min, the one-mediated kinetic constant k being 4.2 times that of BiOCl, and excellent stability and recyclability. |
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