preparation and characterizations of cuo doped zno nano-structure for the photocatalytic degradation of 4-chlorophenol under visible light

Authors

mohsen mehdipour ghazi

faculty of chemical, petroleum, and gas engineering, semnan university, semnan, 35131-19111, iran afsaneh shokri

faculty of chemical, petroleum, and gas engineering, semnan university, semnan, 35131-19111, iran

abstract

in present investigation, zno nanostructure was synthesized by means of a precipitation and sonochemical methods. the x-ray diffraction (xrd) pattern is shown that the wurtzite structure of zno has the hexagonal symmetry and there is no impurity. the average zno particles crystallite size was calculated about 41 nm. the sem and tem images reveal nanostructure zno particles with a cauliflower-like and rod morphology with dimensions of 85, 79 and 117 nm. in order to increment of zno photoactivity under visible light, cuo doped zno nanostructures were fabricated by wet impregnation method using copper oxide as copper source and zno as the precursor. the xrd analysis confirms that cuo phase is present in the as-prepared sample and the average size of nano crystalline decreased to about 36nm. drs spectra indicated the extended absorption of cu-zno to the visible range as a result of band gap reduction to 2.9 ev (in comparison of 3.2 ev in zno). in order to investigate of photocatalytic activity of synthesized photocatalyst, degradation of 4-chlorophenol under visible light was done. sixteen experiments using full factorial were done by adjusting four parameters (amount of catalyst, initial concentration of 4-cp, ph, and time of irradiation). an empirical expression was proposed and successfully used to model the photocatalytic process with a high correlation, and an optimal experimental region was also obtained. from the developed model for degradation and subsequent anova test using design expert software, time of irradiation with 46.57% effect played the most important role in the photocatalytic activity, while the influences of parameters on each other were negligible. optimal experimental conditions for 4-chlorophenol concentration (0.01 g l−1) were found at initial ph =8 and catalyst loading of 0.07 g l−1. results showed that cu-zno can remove 95% of 4-chlorophenol from water in the optimal conditions.

Upgrade to premium to download articles

Sign up to access the full text

Already have an account?login

similar resources

Preparation and characterizations of CuO doped ZnO nano-structure for the photocatalytic degradation of 4-chlorophenol under visible light

In the present investigation, a ZnO nanostructure was synthesized by means of precipitation and sonochemical methods. The X-ray diffraction (XRD) pattern indicated that the wurtzite structure of ZnO had a hexagonal symmetry and there was no impurity. The average ZnO particles crystallite size was calculated at about 41 nm. The SEM and TEM images revealed nanostructure ZnO particles with a cauli...

full text

Enhancing Photocatalytic Activity of Nitrogen Doped TiO2 for Degradation of 4-Chlorophenol under Solar Light Irradiation

The nitrogen doped TiO2 as heterogeneous photocatalyst via sol-gel method were successfully synthesized. The physicochemical, morphological and textural characteristics of the obtained TiO2 samples were characterized by advanced analysis techniques. The photocatalytic activity of the samples were evaluated for degradation of 4-CP under solar irradiation. The as-synthesized photocatalysts were c...

full text

Nitrogen doped TiO2 for efficient visible light photocatalytic dye degradation

In this study, Nitrogen doped TiO2 photocatalysts were prepared by the sol gel method and physicochemical properties were characterized by X-ray diffraction (XRD), and scanning electron microscopy (SEM), photoluminescence, and energy dispersive X-ray spectroscopy (DRS) techniques. The XRD data indicated that the nanoparticles had the same crystals structures as the pure TiO2</su...

full text

Photocatalytic degradation of methylene blue by 2 wt.% Fe doped TiO2 nanopowder under visible light irradiation

In this paper, 2wt.% Fe doped TiO2 nanopowder was prepared by a combination of sol-gel and mechanical alloying methods. The mechanical alloying of Fe powder with Ti(OH)4 gel produced from the sol-gel method was used to produce Fe doped TiO2 nanopowder. The synthesized samples were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM) and diffuse reflectan...

full text

Synthesis of nanocomposite based on Semnan natural zeolite for photocatalytic degradation of tetracycline under visible light

This study investigated the photocatalytic behaviors for the nanocomposite of TiO2 P25 and Semnan natural zeolite in the decomposition of tetracycline under visible light in an aqueous solution. The structural features of the composite were investigated by a series of complementary techniques that included X-ray diffractometer (XRD), Fourier transform infrared spectroscopy (FTIR), scanning elec...

full text

My Resources

Save resource for easier access later


Journal title:
advances in environmental technology

جلد ۲، شماره ۱، صفحات ۱۱-۲۴

Keywords
[ ' c u o d o p e d z n o ' , ' p h o t o c a t a l y t i c d e g r a d a t i o n ' , ' v i s i b l e l i g h t ' , 4 , ' c h l o r o p h e n o l ' ]

Hosted on Doprax cloud platform doprax.com

copyright © 2015-2023