Visible-light-induced g-C3N4/Ni-Al LDH nanocomposites with enhanced photocatalytic activity
Publish Year: 1396
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:
CHCONF05_153
تاریخ نمایه سازی: 2 تیر 1397
Abstract:
Through a green protocol, Ni-Al layered double hydroxides (Ni-Al LDHs) with malar ratio of 1:1, 2:1, and 3:1 were prepared in ultrasonic bath at a low temperature using hexamethylenetetramine as template. Effects of the initial reagent concentration, ultrasound illumination power, and reaction time on the shape and size of the nanostructured Ni- Al LDHs were investigated. Under ultrasonic irradiation, the synthesized nanostructures were combined with graphitic carbon nitride (g-C3N4) as a new nanocomposite for photocatalytic degradation of methyl orange (MO) dye as a pollutant model. Field emission scanning electron microscopy (FE-SEM), powder XRD, and FT-IR spectroscopy were employed to characterize the g-C3N4/Ni-Al LDH nanocomposites. Besides, thermal gravimetric analysis (TGA) was used to investigate the thermal stability of this compound. g-C3N4/Ni-Al LDH nanocomposites demonstrated a more advanced photocatalytic behavior under visible light, which can be explained by the increased specific surficial area and decreased rate of the electron-hole recombination. The optimal percentage of weight for g-C3N4 was 20%. Our synthesized g-C3N4/Ni-Al LDH seem to be highly promising for future applications in different commercial fields and industries. Moreover, they are applicable for photodegradation of other organic pollutants.
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Authors
Ghazal Salehi
Department of Chemistry, Tarbiat Modares University, Tehran, Iran
Ali Reza Mahjoub
Department of Chemistry, Tarbiat Modares University, Tehran, Iran
Reza Abazari
Department of Chemistry, Tarbiat Modares University, Tehran, Iran