Abstract Layered double hydroxides (LDH) with the chemical composition [Mn6Al3(OH)18][(HPO42−)2A+].yH2O (A+ = Li, Na or K) were synthesized for the first time and characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Inductively coupled plasma optical emission spectrometry (ICP-OES) and Scanning electron microscopy coupled with Energy dispersive spectroscopy (SEM-EDS). The precursor materials [Mn2Al(OH)6]Cl.yH2O (basal distance of 7.76 A), [Mn2Al(OH)6]NO3.yH2O (basal distance of 8.88 A) or [Mn6Al3(OH)18][(SO42−)2A+].yH2O (A+ = Li, Na or K; basal distance close to 11 A) were synthesized by co-precipitation with increasing pH. In the topotactic exchange reactions, the precursor having chloride and nitrate incorporated alkali metal cations and hydrogen phosphate while the materials intercalated with sulfate and alkali metal cations showed the ability to exchange anions and cations, opening new opportunities for potential applications where these species need to be removed and reused.

中文翻译：

---

通过拓扑交换反应获得具有 [Mn6Al3(OH)18][(HPO42-)2A+].yH2O (A+ = Li、Na 或 K) 成分的层状双氢氧化物

摘要 首次合成了化学成分为 [Mn6Al3(OH)18][(HPO42−)2A+].yH2O (A+ = Li、Na 或 K) 的层状双氢氧化物 (LDH) 并通过 X 射线衍射表征 ( XRD)、傅里叶变换红外光谱 (FTIR)、电感耦合等离子体发射光谱 (ICP-OES) 和扫描电子显微镜与能量色散光谱 (SEM-EDS) 耦合。前体材料 [Mn2Al(OH)6]Cl.yH2O（7.76 A 的基础距离）、[Mn2Al(OH)6]NO3.yH2O（8.88 A 的基础距离）或 [Mn6Al3(OH)18][(SO42−) )2A+].yH2O（A+ = Li、Na 或 K；基础距离接近 11 A）通过共沉淀随 pH 值的增加而合成。在拓扑交换反应中，