Morphology regulation, structural, and photocatalytic properties of ZnO hierarchical microstructures synthesized by a simple hydrothermal method

Abstract

Zinc Oxide (ZnO) hierarchical microstructures with diverse morphologies were prepared through a simple one-step hydrothermal method with zinc chloride and sodium hydroxide as source materials, and citric acid as the modifying agent. The structure and morphology of the samples were studied through X-ray diffraction, field emission scanning electron microscopy, transmission electron microscopy, and Brunauer-Emmett-Teller specific surface area determination. The morphology of the samples was easily regulated by changing the concentration of citric acid. Branchy structures, porous flowers, porous microspheres, solid flowers, solid flower spheres, and solid spheres of ZnO were obtained. The porous structures obtained with 150-200 mmol Á L À1 citric acid showed excellent photocatalytic activities for the degradation of methylene blue under UV irradiation. A possible regulation mechanism of citric acid in ZnO crystals was proposed based on the experimental results.

Synergistic Effect of Zinc Oxide Nanoparticles and Moringa oleifera Leaf Extract Alleviates Cadmium Toxicity in Linum usitatissimum: Antioxidants and Physiochemical Studies

“…Figure 2D shows the XRD pattern of M. oleifera -stabilized ZnO NPs, where the diffraction peaks are obvious to locate at 2θ values of 31.852, 34.511, 36.331, 47.62, 56.66, 62.917, 66.435, 67.99, and 69.175° corresponding to (100), (002), (101), (102), (110), (103), (200), (112), and (201) crystalline planes, respectively. This is in agreement with the previously reported literature being indexed to the hexagonal wurtzite type of ZnO material (JCPDS 36-1451) (Wang et al, 2017 ). The perception of the XRD pattern reflects the crystalline quality of M. oleifera -stabilized ZnO NPs.…”

Coating effect of renatured triple-helix lentinan on the morphology and antimicrobial activity of ZnO synthesized by hydrothermal method

“…The {10 10} crystal plane family of ZnO crystals is non-polar. 30,31 Cyclic r-LNT can encapsulate the {10 10} crystal planes through hydrogen bonds and hydrophobic interactions, further inhibiting crystal growth and resulting in spherical ZnO nanoparticles with smaller particle sizes. 15,32 This is consistent with the results of the XRD pattern.…”

Investigating the formation of diverse ZnO nanostructures based on solvent, temperature, and pH as adjustable parameters

“…[Zn(OH) 4 ] 2acts as the growth unit for the formation of ZnO nanorods where a number of dissolution-nucleation cycles evolves the nanorods. [44][45][46] The different growth rate of planes are: V 0001 >…”