Doping Induced Tailoring in the Morphology, Band-Gap and Ferromagnetic Properties of Biocompatible ZnO Nanowires, Nanorods and Nanoparticles

Abstract

Abstract:The modification of nanostructured materials is of great interest due to controllable and unusual inherent properties in such materials. Single phase Fe doped ZnO nanostructures have been fabricated through simple, versatile and quick low temperature solution route with reproducible results. The amount of Fe dopant is found to play a significant role for the growth of crystal dimension. The effect of changes in the morphology can be obviously observed in the structural and micro-structural investigations, which may be due to a driving force induced by dipole-dipole interaction. The band gap of ZnO nanostructures is highly shifted towards the visible range with increase of Fe contents, while ferromagnetic properties have been significantly improved. The prepared nanostructures have been found to be nontoxic to SH-SY5Y Cells. The present study clearly indicates that the Fe doping provides an effective way of tailoring the crystal dimension, optical band-gap and ferromagnetic properties of ZnO nanostructure-materials with nontoxic nature, which make them potential for visible light activated photocatalyst to overcome environmental pollution, fabricate spintronics devices and biosafe drug delivery agent.

Fe3+ @ ZnO/polyester based solar photocatalytic membrane reactor for abatement of RB5 dye

“…The enhanced roughness of Fe 3+ @ ZnO discs is also evident from 3D view of tapping mode.This decrease in thickness of discs is concurrent with results of XRD and value of shape factor. The similar results were observed by other research groups (Iqbal et al, 2014). Both PMR have exhibited a significant roughness (Table S2) that obviously explains the strong adsorption abilities (Ahmad et al, 2017b).…”

“…3h). The average particle size of the rectangular disc was 88×123 nm according to TEM Concurring reports also revealed through TEM and HRTEM study that the morphology is dependent on dopant content since it causes the reduction in c-axis lattice constant and change in the spacing between planes (Iqbal et al, 2014). Poly-crystalline nature of Fe 3+ @ ZnO has also been indicated by HRTEM (Fig.…”

“…Semiconductor metal oxides like ZnO, are of great importance as efficient in-situ generation of hydroxyl free radical on irradiation at neutral pH and can be utilized for the degradation of organic pollutants (Alaraby et al, 2015;Zheng et al, 2007). Nanostructures of ZnO are considered as the most competent candidate for wastewater treatment (Kołodziejczak-Radzimska and Jesionowski, 2014).The photocatalytic activity (PCA) of metal oxides greatly depends on morphology, surface area and bandgap (Long et al, 2017;Park et al, 2013).Doping of metal oxides with cations and/or anions increase the surface defects, decrease band gap and enhance PCA (Iqbal et al, 2014;Li et al, 2018;Park et al, 2009;Zheng et al, 2009). Over the years, various methods have been adapted for the synthesis of one dimensional nanostructures of ZnO such as nanowires, nanobelts, nanorods, and nanowhiskers (Ashar et al, 2016;Tabata et al, 2010).…”

Single-Doped and Multidoped Transition-Metal (Mn, Fe, Co, and Ni) ZnO and Their Electrocatalytic Activities for Oxygen Reduction Reaction

“…Variation of the morphology with the incorporation of dopants may be due to the change of the growth mechanism in the presence of dopants. 28 The dopants and Zn ion have different electronegativities, which may play a crucial role in changing the growth mechanism of the crystals. 29 The BET surface areas of the synthesized ZnO materials are altered with the incorporation of dopants.…”

ZnO Metal Oxide Semiconductor in Surface Acoustic Wave Sensors: A Review

“…Operation at RT is the biggest challenge for sensors based on metal oxide semiconductors, and this had led to the development of ways to overcome this inconvenience. These approaches include doping [ 92 , 93 , 94 ], obtaining heterojunctions from p and n-type semiconductors [ 95 , 96 ], developing special microstructures [ 97 , 98 ], and inducing oxygen vacancies or the use of composite materials [ 86 , 99 , 100 ]. Among the most used and known methods of synthesis of doped materials are chemical vapor deposition, the hydrothermal method, the sol-gel method, and thermal annealing [ 101 ].…”