泡沫SiC基亚氧化钛电极的制备及电催化氧化酸性橙G的性能

doi:10.19976/j.cnki.43-1448/TF.2024030

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摘要采用溶胶-凝胶烧结法制备三维泡沫SiC基亚氧化钛(SiC/Ti_nO₂_n_-1)电极。采用扫描电子显微镜、X射线衍射仪和电化学工作站表征亚氧化钛电极的表面形貌、相组成和电化学性能,利用紫外-可见光分光光度计测试其对有机污染物的降解效果。结果表明：1 050 ℃/2 h烧结制备的泡沫SiC基亚氧化钛电极涂层质量较好,分布连续、均匀,且导电相Ti₄O₇的含量最高(质量分数为37.5%)、薄膜电荷转移电阻最低(16.75 Ω),对模拟污染物酸性橙G表现出更快的降解速率(反应速率常数为0.60 h^-1)和更低的能耗(11.63 (kW·h)/m³)。•OH和$ \mathrm{SO}_{4}^{.-}$均参与降解酸性橙G,且•OH和$ \mathrm{SO}_{4}^{.-}$对去除酸性橙G的贡献几乎相同。无机离子$ \mathrm{HCO}_{3}^{-}$、$ \mathrm{NO}_{3}^{-}$、$ \mathrm{H}_{2} \mathrm{PO}_{4}^{-}$的存在对酸性橙G的降解均具有抑制作用,而Cl^-会促进酸性橙G的降解。电极在多次降解中表现出较高的稳定性。

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	余章俊
	王项
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	魏秋平

关键词 ：亚氧化钛电极, 泡沫SiC基体, 电化学性能, 废水降解, 电化学氧化

Abstract：Three dimensional foam SiC based titanium suboxide (SiC/Ti_nO₂_n_-1) electrode was prepared by sol-gel sintering method. The surface morphology, phase composition, and electrochemical property of titanium suboxide electrodes were characterized by scanning electron microscopy, X-ray diffraction, and electrochemical workstation. The degradation effect of organic pollutants was tested using a ultraviolet-visible spectrophotometer. The results show that the coating of foam SiC based titanium suboxide electrode prepared at 1 050 ℃/2 h sintering condition has good quality, continuous and uniform distribution, and the content of conductive phase Ti₄O₇ is the highest (mass fraction is 37.5%), the film charge transfer resistance is the lowest (16.75 Ω). It shows a faster degradation rate (reaction rate constant is 0.60 h^-1) and lower energy consumption (11.63 (kW∙h)/m³) for simulated pollutant acid orange G. Both •OH and $ \mathrm{SO}_{4}^{.-}$ are involved in the degradation of acid orange G, and their contributions to the removal of acid orange G are almost the same. The presence of inorganic ions $ \mathrm{HCO}_{3}^{-}$, $ \mathrm{NO}_{3}^{-}$, $ \mathrm{H}_{2} \mathrm{PO}_{4}^{-}$ has an inhibitory effect on the degradation of acid orange G, while Cl^- promotes the degradation. The electrode exhibits high stability in multiple degradations.

Key words： titanium suboxide electrode foam SiC matrix electrochemical property wastewater degradation electrochemical oxidation

收稿日期: 2024-03-29 出版日期: 2024-08-12

ZTFLH:

TQ15

基金资助:国家“十四五”重点研究发展计划(2021YFB3701800); 国家自然科学基金资助项目(52202056,52274370,52071345,51874370); 广东省“十三五”重点研究开发项目(2020B01085001); 湖南省高新技术产业科技创新引领计划(2022GK4037,2022GK4047); 湖南省自然科学基金资助项目(2023JJ40722); 粉末冶金国家重点实验室自主课题(621022230)

通讯作者: 魏秋平,教授,博士。电话：13875848741;E-mail: qiupwei@csu.edu.cn

引用本文:

余章俊, 王项, 邓泽军, 马莉, 魏秋平. 泡沫SiC基亚氧化钛电极的制备及电催化氧化酸性橙G的性能[J]. 粉末冶金材料科学与工程, 2024, 29(3): 221-230.
YU Zhangjun, WANG Xiang, DENG Zejun, MA Li, WEI Qiuping. Preparation of foam SiC-based titanium suboxide electrode and the performance of electrocatalytic oxidation acid orange G. Materials Science and Engineering of Powder Metallurgy, 2024, 29(3): 221-230.

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http://pmbjb.csu.edu.cn/CN/10.19976/j.cnki.43-1448/TF.2024030 或 http://pmbjb.csu.edu.cn/CN/Y2024/V29/I3/221

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