{'fraction_non_alphanumeric': 0.04411764705882353, 'fraction_numerical': 0.031862745098039214, 'mean_word_length': 5.347150259067358, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Preparation and characterization FeS2 quantum dots -SnO2/MWCNTs nanocomposites for photocatalytic process with response surface methodology

Abstract Iron sulfide (FeS2) quantum dots (QDs) on tin dioxide (SnO2) anchored multi-walled carbon nanotubes (MWCNTs) as a new photocatalysts were prepared by simple precipitation method. The prepared catalyst was characterized by Dynamic light scattering (DLS), X-ray diffraction (XRD), UV–visible spectroscopy, and field emission scanning electron microscope (FESEM). The size of FeS2-SnO2 and FeS2-SnO2/MWCNTs was obtained 35.0 and 36.0 nm, respectively. The crystallite size of SnO2 and FeS2 QDs-SnO2 has been estimated as 20.2, and 22.1 nm, respectively. The photocatalytic efficiency of the FeS2 QDs, FeS2 QDs-SnO2 and FeS2 QDs-SnO2/MWCNTs nanocomposites were investigated by the decomposition of methyl orange (MO) as an organic dye under ultraviolet light irradiation. The FeS2 QDs, FeS2 QDs-SnO2 and FeS2 QDs-SnO2/MWCNTs nanocomposites indicated a high photocatalytic influence at pH 3.0 and within 60 min. The photocatalytic results represented that the photocatalytic efficiency of FeS2 QDs-SnO2/MWCNTs nanocomposites was higher than other the prepared nano-photocatalyst.