油茶壳基多孔炭负载铋系催化剂的制备及有机污染物降解性能研究
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聂佳磊
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江苏海洋大学，江苏连云港，222005
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摘要:在最优制备工艺下，油茶壳基多孔炭具备发达的孔隙结构，可有效分散铋系活性组分、抑制颗粒团聚，同时提升光生载流子分离效率；在可见光照射条件下，复合催化剂对罗丹明B有机污染物的降解率显著优于纯铋系催化剂与未负载多孔炭材料，且具备良好的重复使用稳定性。本研究实现了农业固废资源化利用，制备的复合催化剂绿色高效、成本低廉，为有机化工废水处理提供了新型环保材料与技术参考，具备良好的应用前景与生态价值。
关健词：油茶壳；多孔炭；铋系催化剂；负载改性；有机污染物；光催化降解
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Preparation of Bismuth-Based Catalysts Supported on Camellia Oleifera Shell-Derived Porous Carbon and Its Degradation Performance for Organic Pollutants
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Jialei Nie
Jiangsu Ocean University, Lianyungang Jiangsu 222005, China
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Abstract：Aiming at the problems of high cost, easy agglomeration, difficult recovery and limited degradation efficiency of organic wastewater of traditional photocatalysts, this paper uses agricultural waste oil tea shell as biomass raw material to prepare oil tea shell-based porous carbon (OSPC) through high-temperature carbonization and activation process. Bismuth-based composite catalysts supported by oil tea shell-based porous carbon were prepared by loading bismuth-based semiconductor active components on the carrier. Rhodamine B was used to simulate printing and dyeing wastewater with typical organic pollutants. The effects of process parameters such as carbonization temperature, activator dosage, bismuth source loading capacity and illumination time on the degradation performance of the catalyst were systematically explored. The microscopic morphology, pore structure and optical properties of the catalyst were analyzed by characterization, and the optimal preparation and degradation process conditions were optimized. The experimental results show that under the optimal preparation process, the oil tea shell-based porous carbon has a developed pore structure, which can effectively disperse bismuth-based active components, inhibit particle agglomeration, and improve the separation efficiency of photogenerated carriers. Under visible light irradiation, the degradation rate of composite catalyst for rhodamine B organic pollutants is significantly better than that of pure bismuth-based catalyst and unsupported porous carbon materials, and has good reuse stability. This study realizes the resource utilization of agricultural solid waste. The prepared composite catalyst is green, efficient and low-cost, which provides new environmental protection materials and technical references for the treatment of organic chemical wastewater, and has good application prospects and ecological value.
Keywords : oil tea shell; porous carbon; bismuth-based catalyst; load modification; organic pollutants; photocatalytic
degradation
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