Flower-like NiO microspheres with an average size of ⁓ 3 μm and nanoflakes size ⁓ 10–100 nm were synthesized by surfactant-assisted chemical precipitation method, using Ni(CH₃CO₂)₂·4 H₂O as a nickel source, diethanolamine as a complexing agent, and cetyltrimethylammonium bromide as a surfactant. The obtain material was characterized by SEM, EDX, HR-TEM, XRD, and TGA. The obtained results confirmed the formation of highly ordered flower-like NiO nanoparticles. The catalytic activity of the obtained material was evaluated in the epoxidation reaction of styrene under ambient conditions, using meta-chloroperoxybenzoic acid (m-CPBA) as an oxidant. The obtained results revealed an immediate conversion of styrene to styrene oxide, with high conversion (87%), medium selectivity (65%), and high turnover-frequency (TOF) (243 s⁻¹). However, when bulk NiO was applied only 62% conversion with 68% selectivity and TOF = 174 s⁻¹ were obtained. Furthermore, this catalyst is was easily separable and recyclable. Moreover, a possible reaction mechanism is also proposed.

以表面活性剂辅助化学沉淀法，以Ni（CH ₃ CO ₂）₂ ·4 H ₂ O为镍源，合成了平均粒径为⁓3μm的花状NiO微球和粒径为⁓10-100 nm的纳米薄片。二乙醇胺作为络合剂，十六烷基三甲基溴化铵作为表面活性剂。通过SEM，EDX，HR-TEM，XRD和TGA对获得的材料进行表征。获得的结果证实了高度有序的花状NiO纳米颗粒的形成。在室温下，使用间氯过氧苯甲酸（m-氯苯甲酸）在苯乙烯的环氧化反应中评估了所得材料的催化活性。CPBA）作为氧化剂。获得的结果表明，苯乙烯立即转化为苯乙烯氧化物，具有高转化率（87％），中等选择性（65％）和高周转频率（TOF）（243 s ^-1）。然而，当施加块状NiO时，仅获得62％的转化率和68％的选择性，并且TOF ＝ 174s ^-1。此外，该催化剂易于分离和回收。此外，还提出了可能的反应机理。