Keywords: رسوبات شیمیایی فلزات فلزات; HTC; hydrothermal carbonization; NPs; nanoparticles; OMCVD; organometallic chemical vapor deposition; GC; gas chromatograph; TCD; thermal conductivity detector; ICP-AES; inductively coupled plasma atomic emission spectrometry; FE-SEM; field-emission scann