Solar Light Photocatalytic Degradation of Malachite Green by Hydrothermally Synthesized Strontium Arsenate Nanomaterial through Response Surface Methodology

Abstract

Nanostructured Sr 2 As 2 O 7 samples were synthesized by hydrothermal crystal growth reactions between Sr(NO 3 ) 2 and As 2 O 3 with different stoichiometric Sr:As molar ratios as 1:1 (S 1 ), 1:2 (S 2 ), and 2:1 (S 3 ). The synthesized nanomaterials were characterized by powder X-ray diffraction (PXRD) technique and fourier-transform infrared (FT-IR) spectroscopy. Rietveld analysis showed that the obtained materials were crystallized well in the monoclinic crystal structure with the space group P2 1 . The morphologies of the synthesized materials were studied by field emission scanning electron microscopy (FESEM) technique. TEM images verified formation of the particles with nanometer size. Ultraviolet-visible spectra analysis showed that the synthe-* Dr. S. Khademinia 226S 2 was synthesized following a similar procedure as described for S 1 except 0.30 g (1.4 mmol) of Sr(NO 3 ) 2 ·5H 2 O and 0.28 g (1.4 mmol) of As 2 O 3 were used and the yield was 88 %. S 3 was also prepared similarly using 1.20 g (5.6 mmol) of Sr(NO 3 ) 2 ·5H 2 O and 0.29 g (1.4 mmol) of As 2 O 3 and the yield was 92 %. Supporting Information (see footnote on the first page of this article):The supplementary file describes the experimental design details, proposed mechanism and the photocorrosion study performed in the present work.

Synthesis, Crystal Structure, and Photocatalytic Properties of a Zinc(II) Coordination Polymer Based on 3‐Hydroxy‐2‐pyridinecarboxylic Acid

“…Besides, MOFs can occur various types of ligand‐to‐metal charge‐transfer (LMCT) transitions related to tunable photocatalyst . Compared with other photocatalysts, MOFs not only have the advantages of structural designability, adjustable channels and functional modification, but also easy to reuse owing to their inherent heterogeneous property . In this work, we synthesized and characterized a new coordination polymer denoted as [Zn 3 (HL) 6 ] n ( 1 ) (HL = 3‐hydroxy‐2‐pyridinecarboxylate ions) through solvothermal reaction.…”