基于水滑石的 CeNiAl 混合氧化物用于 SO 吸附和氧化。

Hydrotalcite-based CeNiAl mixed oxides for SO adsorption and oxidation.

机构信息

School of Ecology and Environment, Inner Mongolia University, Hohhot, People's Republic of China.

Center for Environmental and Human Toxicology, Department of Physiological Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL, USA.

出版信息

Environ Technol. 2019 Dec;40(28):3678-3688. doi: 10.1080/09593330.2018.1485749. Epub 2018 Jun 13.

DOI:10.1080/09593330.2018.1485749

PMID:29869948

Abstract

The impact of Ce on SO adsoption and oxidation was studied over a series of flower-like hydrotalcite-based CeNiAl mixed oxides. Combined with XRD, BET, pyridine chemisorption, CO-TPD, XPS and H-TPR results, it revealed that introduction of Ce into NiAlO generates new centres for oxygen storage and release, promotes the enhancement of Lewis acid strength, increases weakly and strongly alkaline sites, and increases ability for SO adsorption and oxidation. Furthermore, Fourier transform infrared spectroscopy revealed that adsorbed SO molecules formed surface bidentate binuclear sulfate. Taken together, we propose that the addition of Ce to NiAlO acts to improve this compound as major adsorbent for SO.

摘要

研究了一系列花状水滑石基 CeNiAl 混合氧化物上 Ce 对 SO 吸附和氧化的影响。结合 XRD、BET、吡啶吸附、CO-TPD、XPS 和 H-TPR 结果表明，Ce 的引入在 NiAlO 中产生了新的储氧和释放中心，促进了 Lewis 酸强度的增强，增加了弱碱和强碱位，并提高了 SO 的吸附和氧化能力。此外，傅里叶变换红外光谱表明，吸附的 SO 分子形成了表面双齿双核硫酸盐。综上所述，我们提出在 NiAlO 中添加 Ce 可以改善这种化合物作为 SO 的主要吸附剂。