Efficient Photocatalytic Degradation of Sulfamethazine by Carboxylic CNT-decorated Bi2O3/Bi2WO6 Heterojunction Catalysts
Jialiu Sun , Yi Ren , Meng Dai , Hongsheng Li , Huijun Yu , Sen Wang , Zuoli He , Shuguang Wang
Chemical Research in Chinese Universities ›› : 1 -11.
Efficient Photocatalytic Degradation of Sulfamethazine by Carboxylic CNT-decorated Bi2O3/Bi2WO6 Heterojunction Catalysts
The persistent contamination of aquatic ecosystems by sulfonamide antibiotics, such as sulfamethazine (SMZ), poses critical challenges to environmental sustainability and human health, demanding innovative solutions for efficient pollutant removal. In this paper, we synthesized a carboxylic carbon nanotube (CNT)-decorated Bi2O3/Bi2WO6 (CNT-BO/BWO) heterojunction using the solvothermal approach, resulting in a remarkable enhancement in photocatalytic performance. The incorporation of CNT-COOH not only increased the specific surface area to 82.99 m2/g and enhanced the adsorption efficiency of sulfamethazine (SMZ) but also improved the carrier separation efficiency through the conductive network. The CNT-BO/BWO catalyst achieved 99% degradation of SMZ within 40 min (with a rate constant of 0.1238 min−1), demonstrating the effectiveness of the interface engineering and conductivity enhancement strategies. Through systematic mechanism analysis, we elucidated the adsorption-catalysis synergy where CNTs simultaneously concentrate pollutant molecules and accelerate interfacial electron transfer, establishing a new representative for designing Z-scheme heterojunction systems. This work provides fundamental insights into multifunctional catalyst engineering for addressing emerging contaminants while advancing sustainable water remediation technologies.
Photocatalyst / Bi2WO6 / Sulfamethazine / Carbon nanotube (CNT) / Heterojunction
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Jilin University, The Editorial Department of Chemical Research in Chinese Universities and Springer-Verlag GmbH
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