Hydrolysis of Zn Ions: Controllable Synthesis of Zn_xCo_1–x(OH)F Nanostructures with Their Electrochemical and Optical Properties

Abstract

Recently, the synthesis and properties of metal hydroxide fluorides have attracted more attention. In this paper, a series of bimetallic hydroxyl fluorides, Zn x Co1–x (OH)­F, were grown on a functionalized carbon fiber paper via a template-/binder-free hydrothermal method, whose nanostructures can be controlled only by adjusting the addition of Zn2+. On the basis of a series of experiments, the mechanism of morphology evolution is proposed first, in which Zn2+ hydrolyzes under hydrothermal conditions to form colloidal micelles, flocculate, and adsorb with other ions. The mechanism of Zn hydrolysis has been verified in other substrates, providing a novel thinking of the design of nanostructure. What is more, the electrochemical properties of the obtained Zn x Co1–x (OH)­F have been studied, illustrating that it processes redox reactions and ion adsorption/desorption simultaneously as a quasi-pseudocapacitance material. On the other hand, the optical properties have been analyzed by the UV–visible absorption spectrum, in which the absorption peaks can be observed around 494, 526, and 628 nm in the visible light region. The above properties illustrate that the obtained Zn x Co1–x (OH)F have potentials in various fields as a novel material, such as electrochemical, physical, or optical fields.

Efficient CdS Nanoparticle/Zn(OH)F Heterojunction Catalysts for Hydrogen Evolution

“…The obtained sample was flower-like Ni x Zn 1−x (OH)F (hereinafter referred to as NZF). 45 2.2.2. Synthesis of CdS/RZF, CdS NP/FZF, and CdS NP/NZF Catalysts.…”

“…The synthesized CdS nanoparticle/Zn­(OH)F (CdS NP/FZF) exhibited superior photocatalytic activity to CdS/Zn­(OH)­F (CdS/RZF). In order to further improve the hydrogen production rate by ameliorating the visible-light response of FZF, Ni 2+ doping was chosen to change the conduction band of the photocatalyst to enhance the reduction ability of H + . − (Scheme ). As expected, flower-like CdS nanoparticle/FZF heterojunction materials show an excellent H 2 production rate as 1100 μmol·g –1 ·h –1 over 58.8 times higher than that of pure CdS.…”

Bimetallic hydroxyl fluoride with high‐rate lithium storage performance: Co 0. 6 Zn 0 .4 ( OH )F material

“…The main diffraction peaks are attributed to the (110), (210), (310), and (400) crystal planes compared with the standard card of Co(OH)F and Zn(OH)F between 10° and 40°. The addition of Zn ions caused a slightly shifted the peak from that of the standard card because of the different ionic radii of Co and Zn in the samples 24 . In addition, the main diffraction peaks are relatively sharp, which indicates high‐crystallinity of the sample.…”

“…The addition of Zn ions caused a slightly shifted the peak from that of the standard card because of the different ionic radii of Co and Zn in the samples. 24 In addition, the main diffraction peaks are relatively sharp, which indicates high-crystallinity of the sample. The EPR spectrum of the sample is shown in Figure 3B.…”

Effect of Oxygen-Containing Group on the Catalytic Performance of Zn/C Catalyst for Acetylene Acetoxylation

“…Moreover, Figure 4 b illustrates the energy spectra of the Zn 2p orbitals of the Zn/AC, Zn/AC-10, Zn/AC-30, and Zn/AC-60 catalysts. The Zn 2p 3/2 and 2p 1/2 peak positions of all the catalysts were clearly observed at 1021.8 and 1045.03 eV, respectively [ 9 , 32 ]. Thus, the binding energies of Zn 2p with different catalysts did not significantly deviate, and the introduction of OCGs did not change the electron cloud density of zinc significantly.…”