PVA/Co₃O₄ beads-free nanofibers were prepared with PVA (polyvinyl alcohol) and cobalt(II) chloride hexahydrate (CoCl₂⋅6H₂O) as precursor solution by the electrospinning method. Structural studies of Co₃O₄ nanoparticles were analyzed with X-ray diffraction (XRD) studies and proved crystalline. Morphological studies were performed with a field emission scanning electron microscope (FESEM) characterization, which revealed that electrospun nanofibers were smoothly edged and randomly distributed along the substrate. The PVA/Co₃O₄ nanofibers were calcined to obtain nanoparticles in the one-dimension-like arrangement. Vapour sensing studies of Co₃O₄ nanoparticles were performed towards the detection of the pulmonary disease biomarkers. The sensing characteristics were analyzed at various temperatures ranging from room temperature to 350 °C and it was observed that Co₃O₄ nanoparticles showed a better response to methanol at 350 °C. At the operating temperature of 350 °C, Co₃O₄ nanoparticle sensing studies were performed towards 21–2094 ppm of methanol. Co₃O₄ nanoparticles showed good sensing characteristics with quick response and recovery time towards methanol vapour, which helps in the detection of pulmonary disease through an exhaled breath.

PVA / Co的₃ ö _4名用PVA（聚乙烯醇）和钴制备珠-自由纳米纤维（II）六水合物（氯化钴₂ ⋅6H ₂ O），通过静电纺丝法的前体溶液。通过X射线衍射（XRD）研究分析了Co ₃ O ₄纳米颗粒的结构，并证明了其结晶性。用场发射扫描电子显微镜（FESEM）表征进行了形态学研究，结果表明电纺纳米纤维边缘光滑且沿基材随机分布。PVA / Co ₃ O ₄将纳米纤维煅烧以获得一维状排列的纳米颗粒。进行了Co ₃ O ₄纳米颗粒的蒸气感测研究，以检测肺部疾病的生物标志物。在从室温到350°C的各种温度下分析了感测特性，观察到Co ₃ O ₄纳米颗粒在350°C下对甲醇表现出更好的响应。在350°C的工作温度下，对甲醇21–2094 ppm进行了Co ₃ O ₄纳米颗粒感测研究。钴₃ O ₄ 纳米颗粒显示出良好的传感特性，对甲醇蒸气的响应迅速，恢复时间短，有助于通过呼气来检测肺部疾病。