Fabrication of Ag/ZnO/Bi2WO6 photocatalyst for boosting photocatalytic activities of cefuroxime sodium in wastewater

IF 5.5 3区材料科学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Carbon Letters Pub Date : 2024-07-19 DOI:10.1007/s42823-024-00777-3

Rui Liu, Xin Zhang, Chong Tan

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Abstract

Environmental-friendly photocatalytic technology is attracting considerable attentions in the filed of antibiotic degradation. In this work, an innovative Ag/ZnO/Bi₂WO₆ catalyst was fabricated using sol–gel and ultrasonic methods for the degradation cefuroxime sodium in wastewater. The optimized Ag/ZnO/Bi₂WO₆ photocatalyst demonstrated the a remarkable 77.0% photocatalytic efficiency within 180 min under simulated solar sunlight, with an apparent rate constant of 0.01085 min⁻¹. This efficiency is notably 6.02 and 1.41 times higher than that of pure ZnO and Ag/ZnO, respectively. The Ag/ZnO/Bi₂WO₆ photocatalyst achieved a degradation efficiency of up to 72.3% in tap water and polluted river water, while achieving 65.7% degradation in pulping wastewater and pharmaceutical wastewater. Experiments involving reactive species scavenging and electron paramagnetic resonance implied that hydroxide radicals were the predominant active species responsible for the degradation. The enhanced catalytic mechanism and degradation pathway were elucidated, providing valuable insights into the construction and development of high-performance catalysts based on zinc oxide.

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制备 Ag/ZnO/Bi2WO6 光催化剂以提高废水中头孢呋辛钠的光催化活性

环境友好型光催化技术在抗生素降解领域备受关注。本研究采用溶胶-凝胶法和超声波法制备了一种创新的 Ag/ZnO/Bi2WO6 催化剂，用于降解废水中的头孢呋辛钠。优化后的 Ag/ZnO/Bi2WO6 光催化剂在模拟太阳光下 180 分钟内的光催化效率达到 77.0%，表观速率常数为 0.01085 min-1。这一效率比纯 ZnO 和 Ag/ZnO 分别高出 6.02 倍和 1.41 倍。Ag/ZnO/Bi2WO6 光催化剂在自来水和污染河水中的降解效率高达 72.3%，而在制浆废水和制药废水中的降解效率为 65.7%。反应物清除和电子顺磁共振实验表明，氢氧自由基是降解的主要活性物质。阐明了增强催化机理和降解途径，为构建和开发基于氧化锌的高性能催化剂提供了宝贵的启示。

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来源期刊

Carbon Letters CHEMISTRY, MULTIDISCIPLINARY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

7.30

自引率

20.00%

发文量

118

期刊介绍： Carbon Letters aims to be a comprehensive journal with complete coverage of carbon materials and carbon-rich molecules. These materials range from, but are not limited to, diamond and graphite through chars, semicokes, mesophase substances, carbon fibers, carbon nanotubes, graphenes, carbon blacks, activated carbons, pyrolytic carbons, glass-like carbons, etc. Papers on the secondary production of new carbon and composite materials from the above mentioned various carbons are within the scope of the journal. Papers on organic substances, including coals, will be considered only if the research has close relation to the resulting carbon materials. Carbon Letters also seeks to keep abreast of new developments in their specialist fields and to unite in finding alternative energy solutions to current issues such as the greenhouse effect and the depletion of the ozone layer. The renewable energy basics, energy storage and conversion, solar energy, wind energy, water energy, nuclear energy, biomass energy, hydrogen production technology, and other clean energy technologies are also within the scope of the journal. Carbon Letters invites original reports of fundamental research in all branches of the theory and practice of carbon science and technology.