Institutional Repository of Chinese Acad Sci, Inst Solid State Phys， Hefei 230031, Anhui, Peoples R China
| Comparative study on arsenate removal mechanism of MgO and MgO/TiO2 composites: FTIR and XPS analysis | |
Wu, Pei-Yun1; Jiang, Yin-Ping1; Zhang, Qun-Ying1; Jia, Yong1; Peng, Dai-Yin1; Xu, Wei2
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| 2016 | |
| 发表期刊 | NEW JOURNAL OF CHEMISTRY
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| 摘要 | The adsorption of arsenate (As(V)) ions onto magnesium oxide (MgO) and magnesium oxide/titanium oxide (MgO/TiO2) adsorbents was investigated by X-ray powder diffraction (XRD), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and zeta potential analysis to reveal the molecular mechanism. Water and carbon dioxide molecules in air changed the surface structures of MgO and TiO2, which resulted in Mg(OH)(2) formation and surface carbonate-like species. On the surface of MgO, unidentate carbonate, bicarbonate and bidentate carbonate were formed, which did not contribute to As(V) removal. The formed Mg(OH)(2) directly reacted with As(V) to form magnesium arsenate, which was confirmed by XRD and FTIR. On the TiO2 surface monodentate carbonate, bicarbonate and CO2- species were confirmed by FTIR. Among them, the surface monodentate carbonate species participated in the ion exchange process towards As(V) ions, which was determined by FTIR and quantified by calculation from the XPS C 1s spectra. The occurrence of FTIR bands at 844 cm(-1) (As-O bond) and 808 cm(-1) (As-OTi bond) suggested that the protonated bidentate binuclear complex, (TiO)(2)AsO(OH) was possibly the dominant species on the TiO2 surface. |
| 文章类型 | Article |
| WOS标题词 | Science & Technology ; Physical Sciences |
| DOI | 10.1039/c5nj02358k |
| 关键词[WOS] | NANOCRYSTALLINE TIO2 FILMS ; CARBON-DIOXIDE ; ADSORPTION MECHANISM ; OXIDE ADSORBENT ; AQUEOUS-SOLUTIONS ; TITANIUM-DIOXIDE ; AS(V) REMOVAL ; DOPED TIO2 ; MAGNESIUM ; SURFACE |
| 收录类别 | SCI |
| 语种 | 英语 |
| 项目资助者 | Natural Science Foundation of Education Committee of Anhui Province(KJ2014A135) ; Natural Science Foundation of Education Committee of Anhui Province(KJ2014A135) ; Natural Science Foundation of Education Committee of Anhui Province(KJ2014A135) ; Natural Science Foundation of Education Committee of Anhui Province(KJ2014A135) ; Natural Science Foundation of Education Committee of Anhui Province(KJ2014A135) ; Natural Science Foundation of Education Committee of Anhui Province(KJ2014A135) ; Natural Science Foundation of Education Committee of Anhui Province(KJ2014A135) ; Natural Science Foundation of Education Committee of Anhui Province(KJ2014A135) ; National Natural Science Foundation of China(51301162) ; National Natural Science Foundation of China(51301162) ; National Natural Science Foundation of China(51301162) ; National Natural Science Foundation of China(51301162) ; National Natural Science Foundation of China(51301162) ; National Natural Science Foundation of China(51301162) ; National Natural Science Foundation of China(51301162) ; National Natural Science Foundation of China(51301162) |
| WOS研究方向 | Chemistry |
| WOS类目 | Chemistry, Multidisciplinary |
| WOS记录号 | WOS:000372425600117 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.hfcas.ac.cn:8080/handle/334002/22028 |
| 专题 | 中科院固体物理研究所 |
| 作者单位 | 1.Anhui Univ Chinese Med, Inst Pharmaceut Chem, Dept Pharm, Hefei 230012, Peoples R China 2.Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wu, Pei-Yun,Jiang, Yin-Ping,Zhang, Qun-Ying,et al. Comparative study on arsenate removal mechanism of MgO and MgO/TiO2 composites: FTIR and XPS analysis[J]. NEW JOURNAL OF CHEMISTRY,2016,40(3):2878-2885. |
| APA | Wu, Pei-Yun,Jiang, Yin-Ping,Zhang, Qun-Ying,Jia, Yong,Peng, Dai-Yin,&Xu, Wei.(2016).Comparative study on arsenate removal mechanism of MgO and MgO/TiO2 composites: FTIR and XPS analysis.NEW JOURNAL OF CHEMISTRY,40(3),2878-2885. |
| MLA | Wu, Pei-Yun,et al."Comparative study on arsenate removal mechanism of MgO and MgO/TiO2 composites: FTIR and XPS analysis".NEW JOURNAL OF CHEMISTRY 40.3(2016):2878-2885. |
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