首页|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

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

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采用溶胶-凝胶烧结法制备三维泡沫SiC基亚氧化钛(SiC/TinO2n-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℃/2h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SO4·-均参与降解酸性橙G,且·OH和SO4·-对去除酸性橙G的贡献几乎相同.无机离子HCO3-、NO3-、H2PO4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.
Preparation of foam SiC-based titanium suboxide electrode and the performance of electrocatalytic oxidation acid orange G
Three dimensional foam SiC based titanium suboxide(SiC/TinO2n-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 SO4-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 HCO3-,NO3-,H2PO4-has an inhibitory effect on the degradation of acid orange G,while Cl-promotes the degradation.The electrode exhibits high stability in multiple degradations.

titanium suboxide electrodefoam SiC matrixelectrochemical propertywastewater degradationelectrochemical oxidation

余章俊、王项、邓泽军、马莉、魏秋平

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中南大学材料科学与工程学院,长沙 410083

中南大学粉末冶金国家重点实验室,长沙 410083

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

国家"十四五"重点研究发展计划国家自然科学基金资助项目国家自然科学基金资助项目国家自然科学基金资助项目国家自然科学基金资助项目广东省"十三五"重点研究开发项目湖南省高新技术产业科技创新引领计划湖南省高新技术产业科技创新引领计划湖南省自然科学基金资助项目粉末冶金国家重点实验室自主课题

2021YFB3701800522020565227437052071345518743702020B010850012022GK40372022GK40472023JJ40722621022230

2024

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

粉末冶金材料科学与工程
中南大学

粉末冶金材料科学与工程

影响因子：0.578
ISSN：1673-0224
年,卷(期)：2024.29(3)
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