Abstract In the present manuscript, Co3O4NPs were synthesized via liquid based chemical process and the obtained NPs were well characterized through various techniques such as SEM, TEM, XRD, FTIR and TGA. The synthesized NPs were employed for chemisorption studies and photocatalytic dye degradation under the UV–visible light irradiation. The Co3O4NPs nanoadsorbent displayed good feasibility, greater adsorption capacity (43.327 mg g−1), more sensitive and highly convenient for the degradation of Safranine dye (SA, efficiency 81.40%). The statistical optimization and validations methods were opted to analyze the kinetic pseudo second order (R2 = 0.999) and equilibrium Langmuir isotherm model (R2 = 0.999). The thermodynamic parameters were also countable heat change, which encourages the adsorption maximum, increases rapidly at temperature 308 K. Overall in sorption process, the Co3O4NPs exhibit good affinity with reliable quantity for the degradation of SA dye and it reveals that reaction was spontaneous and endothermic in nature. The BET surface analysis supports the sorption process, which states that smaller particle size facilitates, grater surface area (Langmuir ~72.7 m2/g) of the product. The analysis provides stability and reusability of photocatalytic nanoadsorbent after four successive cycle experiments in degradation process.

中文翻译：

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通过 Co3O4 纳米吸附剂评估光催化染料降解和吸附模型研究的统计应用

摘要 在本手稿中，Co3O4NPs 是通过液体化学方法合成的，获得的 NPs 通过各种技术，如 SEM、TEM、XRD、FTIR 和 TGA 进行了很好的表征。合成的纳米颗粒用于化学吸附研究和紫外-可见光照射下的光催化染料降解。Co3O4NPs纳米吸附剂表现出良好的可行性，更大的吸附容量（43.327 mg g-1），对Safranine染料的降解更敏感且更方便（SA，效率81.40％）。选择统计优化和验证方法来分析动力学伪二级 (R2 = 0.999) 和平衡 Langmuir 等温线模型 (R2 = 0.999)。热力学参数也是可计数的热变化，这促进了吸附最大值，在 308 K 温度下迅速增加。总的来说，在吸附过程中，Co3O4NPs 对 SA 染料的降解表现出良好的亲和力和可靠的数量，这表明反应本质上是自发和吸热的。BET 表面分析支持吸附过程，该过程表明较小的粒径有利于产品的磨碎表面积 (Langmuir ~72.7 m2/g)。在降解过程中经过四次连续循环实验后，该分析提供了光催化纳米吸附剂的稳定性和可重复使用性。