Synthesis of Zn₂TiO₄@CdS Core‐shell Heteronanostructures by Novel Thermal Decomposition Approach for Photocatalytic Application

Abstract

Zn2TiO4@CdS core‐shell heteronanostructures with Zn2TiO4 as core and CdS nanoparticles as shell have been synthesized for the first time by a novel thermal decomposition approach. The size of CdS nanoparticles in the shell can be easily tuned by varying the amount of single molecular precursor (bis(thiourea)cadmium acetate, [Cd(CS(NH2)2)2]⋅(CH3COO)2). Various state‐of‐art analytical techniques prove the formation of Zn2TiO4@CdS core‐shell heteronanostructures. Powder XRD results confirm the presence of cubic Zn2TiO4 and hexagonal CdS in the core‐shell heteronanostructures. SEM and TEM studies indicate spherical morphology for pure Zn2TiO4 and formation of core‐shell structure in Zn2TiO4@CdS with Zn2TiO4 as core and CdS nanoparticles as shell. XPS measurements prove the presence of Zn2+, Ti4+, Cd2+ and S2− in the Zn2TiO4@CdS core‐shell heteronanostructures. The synthesized Zn2TiO4@CdS core‐shell heteronanostructures were explored for photocatalytic degradation of crystal violet in an aqueous solution. The core‐shell heteronanostructures exhibit better photocatalytic activity as compared to their parent materials.

Surface Modification of ZnO Nanorods using Stearic Acid and their Self‐cleaning and Photocatalytic Applications

“…Similarly, in the Zn 2p spectrum of ZnO(SA2), the peaks at 1018.8 eV and 1041.9 eV correspond to Zn 2p 3/2 and Zn 2p 1/2 , respectively (Figure 7(b)) [66,67] . The difference between the binding energy of 2p 3/2 and 2p 1/2 in stearic acid modified ZnO and unmodified ZnO NRs is 23.0 eV, and 23.1 eV respectively, which proves the +2 oxidation state of zinc in these samples [68,69] …”

“…[66,67] The difference between the binding energy of 2p 3/2 and 2p 1/2 in stearic acid modified ZnO and unmodified ZnO NRs is 23.0 eV, and 23.1 eV respectively, which proves the + 2 oxidation state of zinc in these samples. [68,69] The O 1s spectra of both the samples were deconvoluted. In the O 1s spectrum of ZnO (Figure 7(c)), two peaks are observed.…”

Aero-ZnS prepared by physical vapor transport on three-dimensional networks of sacrificial ZnO microtetrapods

“…The formation of the SnO 2 phase in the prepared aero-ZnS materials revealed by XRD and PL spectral analyses (Figure 7) may be beneficial from the point of view of preparing various nanocomposites in a controlled manner, providing opportunities for bandgap engineering. This approach is interesting for the alignment of the conduction and valence bands of the nanocomposite components with respect to the HOMO and LUMO molecular orbitals of organic compounds subjected to photocatalytic degradation [18,44]. Specific photocatalytic properties of the aero-ZnS materials prepared by physical vapor transport have not been investigated in this paper.…”

A Facile Synthetic Approach for Zn2TiO4@NiCo2O4 Core‐Shell Nanoparticles Using Layered Double Hydroxide Precursors and Studies on Their Peroxidase‐Like Activity

“…[3][4][5] In literature, many authors have reported zinc titanate-based core-shell nanoparticles for different applications. For example, Zn 2 TiO 4 @carbon core/shell nanofibers, ZnO/zinc titanate core-shell nanorods, and Zn 2 TiO 4 @CdS nanoparticles as photocatalyst, [6][7][8] CoFe 2 O 4 -BaTiO 3 core-shell nanoparticles for biological applications, [9] α-Fe 2 O 3 @Li 4 Ti 5 O 12 nanocomposite useful in lithium-ion batteries [10] and Fe 2 O 3 / Fe 2 TiO 5 core-shell nanorods for photoelectrochemical water oxidation. [11] NiCo 2 O 4 is a bimetallic oxide with spinel structure and it shows high electrical conductivity, good intrinsic redox chemistry and tunable physicochemical properties.…”

“…The PL intensity of each solution was compared with that of solution-I. FigureS12displays PL spectra for the decomposition of H 2 O 2 during the peroxidaselike activity with varying amount of catalyst dispersion (10 μL to 100 μL) and at different pH(2)(3)(4)(5)(6)(7)(8)(9)(10). TableS3shows the % decomposition of H 2 O 2 during the peroxidase-like activity.…”