Synthesis of ZnO nanorods modified with TPP, TPPS and Cu-TPPS for photodegradation of MB

Abstract

In this study, ZnO nanorods have been synthesized by a simple precipitation technique with zinc nitrate as starting material in the presence of ammonium hydroxide followed by calcination at 450 ˚C. Then meso-tetrakis(4-phenyl) porphyrin (TPP), meso-tetrakis(4-sulfonatophenyl) porphyrin (TPPS), and Copper meso-tetrakis(4-sulfonatophenyl) porphyrin (Cu-TPPS) have been immobilized on the ZnO nanorods and the potential of the obtained photocatalysts in degradation of methylene blue dye was studied under UV and visible irradiation. The photocatalysts were characterized by various techniques such as XRD, SEM and FT-IR. The influence of experimental parameters on the dye photodecolorization process was studied. The role of porphyrins as sentisizers was also investigated on decolorization rate. Under these optimum conditions, the obtained decolorization efficiency for MB dye was more than 90% under visible light. The reusability of the intended catalyst was also investigated.ZnO nanorod

MICROWAVE ASSISTED SYNTHESIS, CHARACTERIZATION AND PHOTO-CATALYTIC STUDY OF Cu/ZnO NANOCOMPOSITE

“…Both the spectrum shows a characteristic peak of ZnO at 360 nm. 18,27 The incorporation of copper into zinc oxide is indicated by a shoulder peak at 450 nm in Fig. -1b.…”

“…-1b. 27 Anotherband at 619 cm -1 is assigned to the interaction between copper and oxide ion indicating the formation of Cu/ZnO nanocomposite. 200), (112), and (201) reflection planes of hexagonal ZnO respectively.…”

Effect of Solvents on Cadmium-Doped Zinc Oxide Nanoparticles Synthesised by Sol-Gel Technique

“…The crystal structure of theZnO powders is shown in Figure 2. In the XRD patterns, a single phase of the zinc hexagonal wurtzite type was detected in the pure ZnO and cadmium doped ZnO samples, and the (101) peak was found to be the most prevalent in all patterns [11]. It was also observed that the peaks of the ZnO powder synthesized using methanol were more intense than those of the ZnO powder synthesized using ethanol [17].…”

“…Past studies have reported various techniques for modifying ZnO by doping, which resulted in products with enhanced properties and expanded applications. Rahimi et al and Lavand et al improved the optical properties of ZnO by doping with various transition metals, producing nanostructures that were suitable for photocatalysis [11,12]. Doping ZnO with narrow band-gap transition metals and non-metals is believed to be beneficial as it results in band-gap narrowing.…”