Novel Fabrication of Photoactive CuO/HY Zeolite as an Efficient Catalyst for Photodecolorization of Malachite Green
- PDF / 2,046,428 Bytes
- 12 Pages / 595.276 x 790.866 pts Page_size
- 65 Downloads / 209 Views
ORIGINAL PAPER
Novel Fabrication of Photoactive CuO/HY Zeolite as an Efficient Catalyst for Photodecolorization of Malachite Green N. S. Hassan1 · A. A. Jalil1,2 · M. A. H. Satar1 · C. N. C. Hitam1 · F. F. A. Aziz1 · A. A. Fauzi1 · M. A. A. Aziz1 · H. Bahruji3
© Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract Copper oxide loaded on HY zeolite (CuO/HY) catalyst was prepared via a facile electrochemical method, and its photoactivity was evaluated by the decolorization of malachite green (MG) under fluorescent light irradiation. The physicochemical properties of catalysts were characterized by X-ray diffraction (XRD), nitrogen (N2) adsorption–desorption, 27Al and 29Si magic-angle-spinning nuclear magnetic (MAS NMR), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS) and ultraviolet–visible diffuse reflectance spectroscopy (UV–Vis DRS). The results showed that CuO nanoparticles are well-distributed on HY support. Besides, the isomorphous substitution of A l3+ with Cu2+ was occurred to form Si–O–Cu bond, as confirmed by the 27Al and 29Si MAS NMR, FTIR and XPS analysis. The catalyst activity towards on decolorization of MG was ranked in the following order: 3 wt% CuO/ HY (99%) > 5 wt% CuO/HY (86%) > 1 wt% CuO/HY (80%) > HY (41%) > CuO (17%). The highest decolorization by 3 wt% CuO/HY is due to the well distribution of CuO nanoparticles on the HY surface of as well as the Cu incorporated into HY frameworks. In terms of turnover frequency, the 1 wt% CuO/HY showed a higher value (7.95 × 10−4 min−1) compared to the 3 wt% CuO/HY (3.13 × 10−4 min−1) and 5 wt% CuO/HY (1.64 × 10−4 min−1). The decreased of chemical oxygen demand demonstrated that the relationship between decolorization and degradability exists. A kinetic study indicated that the photocatalytic process follows a pseudo-first-order kinetics represented by the Langmuir–Hinshelwood model with the rate determining step as a surface reaction. Graphic Abstract
Keywords Metal–support interaction · CuO/HY · Electrochemical method · Isomorphous substitution · Photodecolorization
* A. A. Jalil [email protected] Extended author information available on the last page of the article
13
Vol.:(0123456789)
1 Introduction Synthetic dyes are used extensively in many fields especially in various branches of the textile industry [1]. For instance, triphenylmethane dye (MG) is frequently used next to azo group dyes because of its high tinctorial strength and its brightness on fabric [2]. It is estimated that approximately 1–15% of the dye is lost during the dyeing process and is released as an effluent [3]. The discharge of these dyes as effluent into the environment can causes serious harm to human health and aquatic life because they are carcinogenic, mutagenic, and photosynthesis inhibitors [4]. In particular, MG dye has been emphasized as one of the sources of headache, high heartbeat, and eyes irritation [5]. Recently, advanced oxidation processes (AOPs) have bee
Data Loading...
