Abstract

AgCl/Ag composite nanoparticles have been synthesized by mechanical activation of reaction NH₄Cl + AgNO₃ + zNH₄NO₃ = (z + 1)NH₄NO₃ + AgCl using an untargeted reaction product (NH₄NO₃) as a diluent, where z = 7.22 is the dilution parameter, followed by partial photoreduction of AgCl to Ag (Ag⁺ to Ag⁰). Formation of Ag nanocrystals (about 7 nm in size) on the surface of 40-nm AgCl nanoparticles has been confirmed by X-ray diffraction analysis, transmission electron microscopy, and absorption spectrophotometry in a wavelength range of 200‒1000 nm. Such AgCl/Ag composite particles exhibit high catalytic activity upon the photodegradation of methylene blue dye in aqueous solutions.

中文翻译：

---

氯化银/银复合胶体颗粒的合成及光催化性能

摘要

通过使用非目标反应产物（NH ₄ NO ₃）作为机械活化反应NH ₄ Cl + AgNO ₃ + z NH ₄ NO ₃ =（z + 1）NH ₄ NO ₃ + AgCl来合成AgCl / Ag复合纳米颗粒。稀释剂，其中z = 7.22是稀释参数，然后将AgCl部分光还原为Ag（从Ag ⁺到Ag ⁰）。通过X射线衍射分析，透射电子显微镜和吸收分光光度法在200‒1000 nm的波长范围内证实了在40 nm AgCl纳米颗粒表面上形成了Ag纳米晶体（尺寸约7 nm）。这种AgCl / Ag复合颗粒在亚甲基蓝染料在水溶液中光降解时表现出高催化活性。