Magnetic Calcium Silicate Heavy Metal Ion Adsorbents for Photocatalytic CO2 Reduction

被引：0

作者：

Li Q. ^{[1
]}

Chen Y. ^{[1
]}

Chen L. ^{[1
]}

Chen F. ^{[1
]}

Yu Y. ^{[1
]}

机构：

[1] Key Laboratory of Advanced Materials Technologies, College of Materials Science and Engineering, Fuzhou University, Fuzhou

来源：

Kuei Suan Jen Hsueh Pao/Journal of the Chinese Ceramic Society | 2021年 / 49卷 / 10期

关键词：

Adsorbents; Calcium silicate hydrate; Carbon dioxide reduction; Ferroferric oxide; Heavy metal ions; Photocatalysis;

D O I：

10.14062/j.issn.0454-5648.20210264

中图分类号：

学科分类号：

摘要：

Fe3O4@calcium silicate hydrate (CSH) nanosheets composite adsorbents were obtained through electrostatic interaction. And an "adsorbent-to-photocatalyst" transformation strategy was proposed: the harmful heavy metal ions from the polluted water were removed by Fe3O4@CSH adsorbents, after which they were recycled and reused as photocatalysts for CO2 reduction. The results demonstrated that: benefiting from ultrahigh surface area and strong ion exchange ability of CSH nanosheets, heavy metal ions including Zn2+, Cu2+, Co2+, Ni2+, and Pb2+ could be efficiently removed by Fe3O4@CSH adsorbents. The maximal adsorption capacities were 83, 142, 150, 179, 343 mg/g, respectively. Fe3O4@CSH adsorbents containing heavy metal ions could efficiently reduce CO2 to CO under visible light. Particularly, Fe3O4@CSH-Ni after adsorption of Ni2+ showed the best catalytic activity. The CO generation rate was up to 3 310 μmol/(g∙h) with a high selectivity of 99.3%. Besides, the magnetic property of Fe3O4 enabled the rapid recovery of Fe3O4@CSH during the adsorption and photocatalysis processes. © 2021, Editorial Department of Journal of the Chinese Ceramic Society. All right reserved.

引用

页码：2045 / 2052

页数：7

共 28 条

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