标题: Boosting toluene destruction by engineering surface acidity-alkalinity in defective cobalt oxide catalyst

作者: Wang, DT (Wang, Dengtai); Yuan, C (Yuan, Chang); Jiang, LX (Jiang, Luxiang); Wang, ZW (Wang, Zuwu); Lei, ZG (Lei, Zhuge); Wang, K (Wang, Kun)

来源出版物: JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING 卷: 12 期: 5 文献号: 113983 DOI: 10.1016/j.jece.2024.113983 Early Access Date: AUG 2024 Published Date: 2024 OCT

摘要: The surface acidity and alkalinity of catalysts played a decisive role in the destruction of Volatile organic compounds (VOCs). In this study, a series of Co3O4 catalysts were synthesized under different temperatures by calcining metal organic frameworks (MOFs). By controlling the temperature, the organic linkers were effectively eliminated, resulting in catalysts with a high specific surface area due to the preservation of the parent structure of the MOFs. Among the catalysts tested, Co3O4-350 (calcined at 350 degrees C) demonstrated the highest catalytic activity for toluene oxidation (T90 =231 degree celsius) and reliable water resistance (3 vol.% water vapor). The efficacy was attributed to the high ratio of reactive oxygen species and high valence Co species, weaken Co-O bond strength as well as high concentration of oxygen vacancies. In situ diffuse reflectance infrared Fourier transform spectroscopy (in situ DRIFTS) demonstrate that acidity-alkalinity is crucial in the adsorption and activation, while oxygen vacancies were found to be essential for deep oxidation.

作者关键词: Calcination temperatures; Acidity-alkalinity; Toluene oxidation; Metal organic frameworks

地址: [Wang, Dengtai; Jiang, Luxiang; Wang, Zuwu] Wuhan Univ, Sch Resources & Environm Sci, 299 Bayi Rd, Wuhan 430072, Peoples R China.

[Yuan, Chang] Wuhan Business Univ, Sch Mech & Elect Engn, 816 Dongfeng Ave, Wuhan 430056, Peoples R China.

[Lei, Zhuge; Wang, Kun] Shandong Bur Coal Geol, Prospecting Team 2, Jining 272007, Peoples R China.

通讯作者地址: Wang, ZW (通讯作者)，Wuhan Univ, Sch Resources & Environm Sci, 299 Bayi Rd, Wuhan 430072, Peoples R China.

电子邮件地址: hjgcapc@163.com

影响因子：7.4