Abstract

Delafossite AgFeO₂ nanoparticles were synthesized by the modified hydrothermal procedure for excellent photochemical performances for the removal of organic dye from neutral and alkaline aqueous medium. The structure, morphology, and elemental studies of the delafossite AgFeO₂ nanoparticles were done by analytical methods. AgFeO₂ nanoparticles show the refined lattice parameters of “a” = 3.033(2) Å and “c” = 18.591(3) Å of R3m phase. The excellent photocatalytic performance of delafossite AgFeO₂ nanoparticles was observed under the full sunlight irradiations, which resulted ~92% degradation of methylene blue (MB) dye in 40 min using alkaline medium. The kinetic studies confirm the pseudo-first-order reactions of MB dye degradation in presence of photocatalysts. The fragmentations of organic dye molecules in presence of delafossite AgFeO₂ photocatalysts under sunlight irradiations were also studied using the GC–MS technique. The delafossite AgFeO₂ nanoparticles show excellent photocatalytic regeneration efficiency.

中文翻译：

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铜铁矿AgFeO 2纳米粒子的合成，表征和重要的光化学性能

摘要

通过改进的水热程序合成了Delafossite AgFeO ₂纳米粒子，该纳米粒子具有出色的光化学性能，可从中性和碱性水性介质中去除有机染料。铜铁矿AgFeO ₂纳米颗粒的结构，形态和元素研究都是通过分析方法完成的。AgFeO ₂纳米颗粒显示出R3m相的“ a ” = 3.033（2）Å和“ c ” = 18.591（3）Å的精确晶格参数。铜铁矿AgFeO ₂的优异光催化性能在完全阳光照射下观察到纳米颗粒，使用碱性介质在40分钟内导致约92％的亚甲基蓝（MB）染料降解。动力学研究证实了在光催化剂的存在下MB染料降解的拟一级反应。还使用GC-MS技术研究了铜铁矿AgFeO ₂光催化剂在阳光照射下有机染料分子的碎片化。铜铁矿AgFeO ₂纳米颗粒显示出优异的光催化再生效率。