The cobalt/cobalt oxide nanocomposites (Co/CoO NCs), NC‐1 and NC‐2 were synthesizedfrom our recently reported single‐source molecular precursors (SSMPs) [Co(hep‐H)(H₂O)₄]SO₄, (1) and [Co(hep‐H)₂(H₂O)₂](NO₃)₂, (2), [hep‐H= 2‐(2‐hydroxylethyl) pyridine], respectively, via wet‐chemical reduction method. Our purpose was to study the effect of different counter anions (i. e. SO₄²⁻ and NO₃⁻) of precursors on the surface properties of synthesized materials. Both the nanocomposites were characterized by Powder X‐ray diffraction (PXRD), Scanning electron microscopy (SEM), Energy‐dispersive X‐ray analysis (EDAX), Transmission electron microscopy (TEM), Fourier transform infrared (FTIR) spectroscopy and Brunauer–Emmett–Teller (BET) analysis. Two distinct morphological as well as surface features have been obtained using 1 and 2 viz. variable spheres (NC‐1) with low surface area and flakes (NC‐2) with high surface area. The adsorption behavior of these nanocomposites on industrial dyes and metals showed excellent dye adsorption (99.6% to 97.2%) and good to moderate metal adsorption efficiency of NC‐1. The NC‐1 could be recycled up to five times for dyes and three times for metals, advocating its practical applications in industry.

中文翻译：

---

单一来源分子前驱体产生的钴/氧化钴纳米复合材料对水系统中各种染料和金属污染物的诱人吸附

钴/钴氧化物纳米复合材料（Co / CoO NCs），  NC-1 和 NC-2是由我们最近报道的单源分子前体（SSMP）[Co（hep-H）（H ₂ O）₄ ] SO ₄合成的， （1）和[Co（hep-H）₂（H ₂ O）₂ ]（NO ₃）₂，（2），[hep-H = 2-（2-羟乙基）吡啶]，分别通过湿化学法还原法。我们的目的是研究不同抗衡阴离子（即SO ₄ ²⁻和NO ₃ ⁻）前体对合成材料的表面性能的影响。两种纳米复合材料均具有粉末X射线衍射（PXRD），扫描电子显微镜（SEM），能量色散X射线分析（EDAX），透射电子显微镜（TEM），傅里叶变换红外（FTIR）光谱和Brunauer–埃梅特-泰勒（BET）分析。使用1和2 即获得了两种不同的形态学和表面特征。低表面积的可变球体（NC-1）和高表面积的薄片（NC-2）。这些纳米复合材料在工业染料和金属上的吸附行为显示出极好的染料吸附（99.6％至97.2％）和良好的中度NC-1金属吸附效率。在NC-1可以回收起来用于染料五次，三次金属，倡导在行业中的实际应用。